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Avaya Configuring LLC Services User's Manual

1. DLCI 100 PC Token ring Frame relay C I DLCI 101 DLSw Router A Router B lt lt Connection request Mapping Table for Router B DLCI Remote MAC Local MAC Source MAC smac virtual 100 400000000003 Destination MAC dmac 400000000003 101 400000000003 LLC0009A Figure 2 3 Frame Relay to Virtual MAC Topology 308635 15 1 Rev 00 2 7 Configuring LLC Services Physical MAC Address to Frame Relay DLCI Figure 2 4 illustrates a sample physical MAC address to frame relay DLCI mapping In this network the PC makes connection requests to hosts 1 and 2 The workstation administrator does not have control over the PC configuration and must use a configuration with real physical MAC addresses for the remote hosts At router B a mapping table maps hosts 1 and 2 to the DLCIs assigned to the hosts The connection request received at router A will have the source MAC address of the PC MAC and a destination MAC address of remote host 1 or 2 Configuration at PC Remote host 1 400000000001 Remote host 2 400000000002 PC MAC 400000000003 DLCI 100 Frame relay CE CE DLCI 101 mm DLSw E Router A Router B gt Connection request Mapping Table for Router B Remote MAC Local MAC orci Source MAC smac PC MAC 400000000001 100 Destination MAC dmac remote host 1 or 2 400000000002 101 LLC0010A
2. Add a serial interface on which you want to configure frame relay SRB LLC2 and DLSw box serial 3 1 serial 3 1 Configure frame relay on the serial interface serial 3 1 frame relay frame relay 3 1 Configure a service name for the frame relay interface frame relay 3 1 service service service servicel Configure SRB on the frame relay service service servicelt srb interface ring id 0x30 srb servicel 308635 15 1 Rev 00 Configuring LLC Services 11 Add LLC2 to the frame relay service 12 srb servicel Ile2 1l1c2 servicel Configure DLSw on the serial interface 1ll1c2 serviceis dlsw dlsw servicelt For complete information about configuring DLSw see Configuring DLSw Services Using Site Manager To enable DLSw and LLC2 over frame relay BAN complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window click on the synchronous connector on which you are enabling DLSw services The Add Circuit window opens Click on OK to accept the default circuit name The WAN Protocols window opens 3 Choose Frame Relay and click on OK The Select Protocols window opens 4 Choose DLSw When you choose DLSw you automatically choose LLC2 Click on OK The Frame Relay SNA Connection window opens Click on BAN PVC The DLSw Basic Global Parameters window opens Set the following p
3. Figure 2 4 Physical MAC to Frame Relay Topology 2 8 308635 15 1 Rev 00 LLC2 Routed over Frame Relay Frame Relay DLCI to Physical MAC Address Figure 2 5 illustrates a sample frame relay DLCI to physical MAC mapping In this network hosts 1 and 2 can make connection requests to the PC The workstation administrator does not have control over the PC configuration and must use a configuration with real physical MAC addresses for the remote hosts Router B requires a mapping table to map the DLCIs for hosts 1 and 2 to the PC MAC address Router B creates a connection request with the source MAC address equal to the virtual MAC address corresponding to the host 1 and 2 DLCIs Router B also creates a connection request with the destination MAC address equal to the local MAC address from the mapping table Router B always sets the source MAC address equal to the virtual MAC address even when a remote MAC address is configured in the mapping table Note This mapping does not work with applications that check the source MAC address against configured remote host addresses 308635 15 1 Rev 00 2 9 Configuring LLC Services Configuration at PC Remote host 1 400000000001 Remote host 2 400000000002 PC MAC 400000000003 DLCI 100 DLCI 101 Frame relay Router A Router B 4 Connection request Mapping Table for Router B Remote MAC Local MAC DLCI Source MAC smac
4. ace ceceen rinm e reet tnim A 6 LLC2 Frame Relay PVC Mapping Parameters sssssseeeeeeenmeenn A 8 LECZ Taal Paramstbre naso biis uerbi ht seus bns ER IER Por Ed bu fuss bai adu buphi UNES A 9 LLCZ Interface PSIESITISISER cd Rr er FE Rr bra pep TENORA pet Lap UU RE ecd A 10 308635 15 1 Rev 00 vii Appendix B Monitoring LLC Using the BCC show Commands Online Hel a Tor show Commando c H B 2 PS gl Ea athe ap nd sem A IE E te nace mica EE NEN cork aap NEU VODA E HER B 3 Cli d eue e TO NS DE B 5 SHOW pesi Mm Rm B 6 show llc2 interfaces euet tank crea xxu verde n Un tU E AREE MR XS RA A And ARRA Eada ankaa B 7 SHOW G2 ji icr EE B 8 isdem HY B 8 Index viii 308635 15 1 Rev 00 Figures Figure 1 1 Sample Frame Relay Network eesesessssseeseeeeeeeneee enne 1 4 Figure 1 2 LLC Sublayer in the IEEE 802 x and OSI Models ssssss 1 7 Figure 1a LLC PDU ren imini aeaiia oaa aaa EA EaR OEA ERREARI 1 11 Figure t4 DSAP Address FIBI uus eme rd p RR ELA DERE ER LEE FEAR LEER EE BR ERA 1 11 Figure Jo SAP Address Field ues oostzdosib ebrii e RM pRER etai et aaa 1 12 gU XL OEC I for LLG ClO sensi ceieciieeri nude ak 1 13 Figure 1 7 LLC PDU Control Field Format 0 0 0 ccccccecseceseeeeeeeneeeseeeeseeeeteeeeeeaees 1 15 Figure 2 1 Sample Frame Relay Network Using LLC2 seeeee 2 3 Figure 2 2 Virtual MAC to Frame Relay
5. virtual 400000000003 100 Destination MAC dmac 400000000003 400000000003 101 LLC0011A Figure 2 5 Frame Relay to Physical MAC Topology Frame Relay DLCI to Frame Relay DLCI Figure 2 6 illustrates a sample frame relay DLCI to frame relay DLCI mapping In this network the PC makes connection requests to both hosts 1 and 2 The workstation administrator has configured the PC with remote hosts 1 and 2 equal to the assigned DLCIs Router A requires a mapping table to map the remote host 1 and 2 DLCIs to a virtual MAC address corresponding to the host 1 or 2 DLCI Router A creates a connection request with the source MAC address equal to the virtual MAC address corresponding to the remote host 1 or 2 DLCI Router B creates a connection request with the destination MAC address equal to the local MAC address from the mapping table 2 10 308635 15 1 Rev 00 LLC2 Routed over Frame Relay Router A always sets the source MAC address equal to the virtual MAC address even if there is a remote MAC address configured in the mapping table Remote host 1 DLCI 102 Remote host 2 DLCI 103 DLCI 100 100 decimal 64 hex Frame relay Jl DLCI 101 Frame relay 101 decimal Router A lt m Router B 65 hex Connection request Mapping Table for Router A DLG Local MAC 102 400000FF0064 103 400000FF0065 No mapping Source MAC smac virtual Destination MAC
6. Bay Command Console BCC Using the Bay Command Console BCC Site Manager Configuring and Managing Routers with Site Manager These guides also describe generically how to create and modify a device configuration LLC2 Configuration Hierarchy Figure 3 1 shows the hierarchy of LLC objects and the relationship between objects The atm frame relay ethernet token ring and fddi objects are the interfaces on which you can configure LLC LLC0016A Figure 3 1 LLC2 Configuration Hierarchy continued next page 3 2 308635 15 1 Rev 00 Starting LLC Services atm lec service logical line frame relay default service service frame relay default service service frame relay default service LLC0017A Figure 3 1 LLC2 Configuration Hierarchy continued 308635 15 1 Rev 00 3 3 Configuring LLC Services Starting LLC2 on a LAN Interface When you configure an LLC2 interface on an 802 x LAN physical LAN attachment circuit you supply information required by the MAC and LLC sublayers You can use the BCC or Site Manager to start LLC2 on a LAN interface using default values for all parameters Using the BCC The following sections describe how to use the BCC to configure LLC2 on Ethernet token ring and FDDI interfaces When you add LLC2 to one interface LLC2 is automatically configured on the router Configuring LLC2 on an Ethernet Interface To configure LLC2 on an Et
7. Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Reject Timer Configuration Manager gt Protocols gt LLC2 gt Interfaces 1 s 1 to 30 Specifies the amount of time in seconds that the local LLC waits to receive a reply to a REJ PDU frame reject response PDU If the reject timer expires and no reply has been received for the REJ PDU sent by the local LLC the local reject timer restarts and LLC retransmits the REJ PDU The total number of times that a specific REJ PDU can be retransmitted depends on the setting of the Max Retry After TimeOut parameter Enter any valid value from 1 through 30 The default value 1 second works in most environments but may be too small if the LLC connection is over frame relay a source route network with multiple hops or if the end station responds slowly to I frames Choose a value that is appropriate for the applications that LLC2 supports 1 3 6 1 4 1 18 3 5 1 6 2 1 14 Busy Timer Configuration Manager gt Protocols gt LLC2 gt Interfaces 60 s 1 to 60 Specifies the amount of time in seconds that the local LLC waits for an indication from a remote LLC that it is ready to receive PDUs from the local LLC The busy condition at the remote LLC has been cleared If the remote busy timer expires and no indication has been received that the remote busy condition has been clea
8. Receive sequence number N R bit PDUs contain N R which is the sequence number of the PDU an LLC expects to receive next on the specified data link connection Poll final P F bit The P F bit solicits polls a response from the addressed LLC The final F bit indicates the response PDU sent as a result of a soliciting poll command 308635 15 1 Rev 00 Logical Link Control Overview Table 1 4 further defines the purpose of each command and response PDU Table 1 4 Command and Response PDU Names and Definitions Command Control Field Response PDU Value Definition Unnumbered 0x13 The Ul command PDU transports information to one or more information UI or LLCs Because this is a type 1 operation there is no 0x03 corresponding response reply PDU Exchange OxBF The XID command PDU conveys the following information to the identification XID or destination LLC OxAF e Types of LLC services that the source LLC supports e Receive window size that the source LLC supports per data link connection per virtual circuit The XID response PDU identifies the responding LLC and conveys to the source LLC Types of LLC services that the destination LLC supports e Receive window size that the destination LLC supports per data link connection per virtual circuit Test TEST OxF3 The TEST command PDU causes the destination LLC to respond or with the TEST response PDU it performs a loopback test of the
9. This command allows for the following command filter flag and argument interface circuit name Displays information about connections for the specified interface only The output includes the following information Name Circuit name assigned to the interface Dest MAC MAC address of the remote station Src MAC MAC address of the local station Dsap One or more destination SAPs for which the LLC PDU is intended Ssap Specific source SAP that initiated the PDU show llc2 summary The show Ilc2 summary command displays general information about LLC2 interfaces including current operational status and the maximum number of links configured This command also shows whether global LLC2 is enabled This command allows for the following command filter flag and argument interface circuit name Displays information about connections for the specified interface only The output includes the following information Name Circuit name assigned to the interface State State of the LLC service up down init initializing disabled or absent Max Links Maximum number of end to end connections per LLC service B 8 308635 15 1 Rev 00 A Ack Timer for Xmt parameter A 15 acronyms xv address mapping 2 4 to 2 11 address mask A 18 addresses real and virtual 2 4 ATM LANE configuring using BCC 3 8 configuring using Site Manager 3 9 BCC show
10. Using Site Manager Starting LLC Services In Site Manager you should not add LLC2 to an interface without also adding the DLSw APPN or LNM protocol To start LLC2 on a LAN interface complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window click on the Ethernet token ring or FDDI connector on which you want to enable LLC2 services The Add Circuit window opens Click on OK to accept the default circuit name In the Select Protocols window choose DLSw APPN or LNM Servers and click on OK When you select one of these items LLC2 is selected automatically On FDDI and token ring interfaces source routing is also selected automatically The Select Protocols window opens Depending on the protocol that you selected DLSw APPN or LNM a configuration window opens Enter the required information in the configuration windows Click on Help or see the configuration guide for DLSw APPN source route bridging or LNM 308635 15 1 Rev 00 Configuring LLC Services Starting LLC2 over ATM LANE The following sections describe how to configure LLC2 and DLSw over ATM LAN emulation LANE using the BCC or Site Manager Using the BCC To configure LLC2 and DLSw on an ATM LANE interface with default settings 1 2 In configuration mode navigate to the box or stack prompt Configure an ATM interface
11. 11c2 servicelt 308635 15 1 Rev 00 10 11 12 Starting LLC Services Configure the frame relay DLCI to which you are mapping the local or remote MAC address For example enter llc2 serviceist dlci 101 dlci 101 Configure a remote MAC address a local MAC address or both e If you configure a MAC address for a local end station incoming requests on this DLCI are mapped to the specified local MAC address e If you configure a MAC address for a remote MAC address outgoing requests specifying this MAC address are mapped to the DLCI For example to specify both a local and remote MAC address enter dlci 101 local mac 111111111111 remote mac 222222222222 dlci 101 Return to the llc2 prompt dlci 101 back llc2 servicel Configure DLSw on the serial interface 1lc2 servicel dlsw dlsw servicel For complete information about configuring DLSw see Configuring DLSw Services Using Site Manager To enable DLSw and LLC2 over a frame relay BNN interface using PVCs complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Add Circuit window opens click on the synchronous connector on which you are enabling DLSw services 2 Click on OK to accept the default circuit The WAN Protocols window opens name 3 Choose Frame Relay and click on OK The Select Protocols window opens continued 308635 1
12. 12 By default the SVC mapping type is set to local If you want to map the SVC to a remote MAC address enter the following command fr svc 1111111111114 mapping type remote fr svc 111111111111 amp For information about editing other parameters for LLC2 frame relay SVCs see Editing Frame Relay SVC Mappings on page 4 17 13 Return to the llc2 prompt fr svc 1111111111114 back 11c2 servicel 14 Configure DLSw on the serial interface llc2 serviceig dlsw dlsw servicel For complete information about configuring DLSw see Configuring DLSw Services Using Site Manager To enable DLSw and LLC2 over frame relay BNN using SVCs complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Add Circuit window opens click on the synchronous connector on which you are enabling DLSw services 2 Click on OK to accept the default circuit The WAN Protocols window opens name 3 Choose Frame Relay and click on OK The Select Protocols window opens 4 Choose DLSw When you choose DLSw you automatically choose LLC2 5 Click on OK The Frame Relay SNA Connection window opens 6 Click on BNN SVC The DLSw Basic Global Parameters window opens continued 308635 15 1 Rev 00 3 19 Configuring LLC Services Site Manager Procedure continued You do this System responds 7 Set the following para
13. LLC2 gt Frame Relay SVC Mapping Local Local Remote Specifies whether this is a remote or local mapping Accept the default Local or choose Remote 1 3 6 1 4 1 18 3 5 1 6 10 1 4 X121 Addr Configuration Manager gt Protocols gt LLC2 gt Frame Relay SVC Mapping None Any display string Specifies a WAN address for example X 121 or E 164 that is registered with frame relay to accept an incoming call if the mapping is local or to establish an SVC initiate the call to the configured number if the mapping is remote Enter the X 121 or E 164 address that you want 1 3 6 1 4 1 18 3 5 1 6 10 1 5 Sub Addr Configuration Manager gt Protocols gt LLC2 gt Frame Relay SVC Mapping None Any display string Specifies the outbound calling or called party subaddress which is also the inbound calling or called party subaddress Enter the number 1 3 6 1 4 1 18 3 5 1 6 10 1 6 A 4 308635 15 1 Rev 00 Site Manager Parameters Parameter Numbering Plan Path Configuration Manager gt Protocols gt LLC2 gt Frame Relay SVC Mapping Default X 121 Options E 164 X 121 Function Specifies whether this SVC uses the E 164 or X 121 number plan for addresses Instructions Choose the numbering plan that applies to your network MIB Object ID 1 3 6 1 4 1 18 3 5 1 6 10 1 7 Parameter Type of Number Path Configuration Manager gt Protocols gt LLC2 gt Frame Relay SVC Mapping Default International Options Un
14. OxE3 LLC to LLC transmission paths The TEST command PDU also initiates the establishment of an LLC1 logical link across a network to another LLC entity The TEST response PDU confirms the establishment of an LLC1 link continued 308635 15 1 Rev 00 Configuring LLC Services Table 1 4 Command and Response PDU Names and Definitions continued Command Control Field Response PDU Value Definition Information I 6xxx0 The command PDU indicates to the destination LLC or xx even e Sequence number for each command PDU e PDU sequence number that the destination LLC expects next The command PDU also serves as an response PDU by indicating to the destination LLC that the source LLC received PDUs up to a designated number from that destination LLC Receiver ready 01xx The RR command PDU indicates that the source LLC is ready to RR receive an PDU The sending LLC then considers PDUs sent prior to the RR condition as acknowledged Receiver not ready 05xx The RNR command PDU notifies the destination LLC that the RNR originating LLC is busy and temporarily unable to receive PDUs RNRs combined with RRs control flow between source and destination LLC interfaces Reject 09xx The REJ command PDU conveys a request to the peer LLC to REJ retransmit PDUs starting with the PDU that the REJ command designates Set asynchronous 7F The SABME command PDU establishes an LLC2 connection to ba
15. You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose LLC2 Choose Interfaces The LLC2 menu opens The LLC2 Interface Configuration window opens Click on the interface that you want to customize Set the following parameters e Max Octets in UI e Max Octets in I Click on Help or see the parameter descriptions beginning on page A 12 6 Click on Apply 7 Click on Done You return to the Configuration Manager window Configuring Timers Four timers control how many seconds the local LLC waits to receive the following data Acknowledgment for an outstanding PDU Reply to a frame reject response PDU Indication from a remote LLC that it is ready to receive PDUs PDU soliciting the status of the remote LLC 308635 15 1 Rev 00 Configuring LLC Services Using the BCC To configure LLC2 timers navigate to the LLC2 interface prompt for example box ethernet 2 1 Ilc2 and enter one or more of the following commands ack xmt timer lt seconds gt reject timer lt seconds gt busy timer lt seconds gt poll cycle timer lt seconds gt For ack xmt timer seconds is 1 through 15 for reject timer and poll cycle timer seconds is 1 through 30 for busy timer seconds is 1 through 60 For example the following command changes the values for the ack xmt timer and reject timer parameters to 5 and the values
16. box atm 3 1 atm 3 1 Enable signaling on the ATM interface atm 3 1 signaling signaling 3 1 Return to the ATM interface prompt signaling 3 1 back atm 3 1 Create a LAN emulation client LEC service record for the interface For example to create a service record with the name servicel enter atm 3 1 lec service service1 lec service servicel Add LLC2 to the LEC service record lec service servicel llc2 1l1c2 servicel Add DLSw to the service record llc2 serviceis dlsw dlsw servicel For complete information about configuring DLSw see Configuring DLSw Services 3 8 308635 15 1 Rev 00 Using Site Manager Starting LLC Services To enable LLC2 and DLSw over ATM LANE complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window click on the ATM connector on which you are enabling LLC2 and DLSw services The Add Circuit window opens 5 Click on Service Attributes 2 Click on OK to accept the default circuit The Select Connection Type window name opens 3 Click on ATM The Initial ATM Signaling Config window opens 4 Click on OK The Edit ATM Connector window opens The ATM Service Records List window opens Configuration Manager window 6 Click on Add The ATM Service Record Parameters window opens 7 Click on OK The Select Protocols window opens In the Se
17. dmac 400000FF0064 or 400000FF0065 LLC0012A Figure 2 6 Frame Relay to Frame Relay Topology 308635 15 1 Rev 00 2 11 Configuring LLC Services LLC2 over Frame Relay Routed versus Bridged Figure 2 7 illustrates a SNA over frame relay with source route bridging and b SNA over frame relay in native mode including routing through SDLC and Ethernet The frame relay link can be part of an alternate route to the token ring or other link Dotted lines indicate the path of LLC which passes through bridging but terminates at the router for more flexible routing RFC 1490 bridging standard RFC 1490 routing standard SNA mainframe V VN NN V VN XS N SNA mainframe i IBM 3745 IBM 3745 6 communications communications controller controller running NCP running NCP 7 1 or higher I net i Frame relay l E network i IL Il Router removes E Nortel Networks router l FR headers with single switch DLSw I operating as FRAD t t Cc 1 Ethernet E SDLC it E E I I a F F Router encapsulates 2 I data in FR headers 1 To remote sites ER
18. operating within the router LLC Service Classes The 802 2 LLC recommendations support three service classes e Connectionless unacknowledged Class 1 or LLCI e Connection oriented Class 2 or LLC2 e Connectionless acknowledged Class 3 or LLC3 Note The Nortel Networks implementation of LLC does not support the LLC3 service class 308635 15 1 Rev 00 1 7 Configuring LLC Services LLC1 Connectionless Service LLCI is a datagram service that sends and receives LLC frames called link service data units LSDUs without requiring acknowledgment from the peer to assure delivery LLCI supports all forms of communication point to point multipoint multicast and broadcast LLCI service is appropriate for protocols that provide addressing routing recovery and sequencing services at a higher layer LLC2 Connection Oriented Service LLC2 secures point to point virtual circuit connections between link service access points LSAPs by acting as follows e Responds to a higher level protocol s request to open a connection through the data link layer e Notifies a higher level protocol that a connection through the data link layer has been established successfully Enables a higher level protocol to govern LSDU activity by Sending or receiving LSDUS over an established data link layer connection Sequencing LSDUs sent over a data link layer connection Controlling the flow of LSDUs over a data li
19. 6 1 4 1 18 3 5 1 6 2 1 25 A 18 308635 15 1 Rev 00 Site Manager Parameters Parameter FR Sap Translation Path Configuration Manager gt Protocols gt LLC2 gt Interfaces Default Disable Options Enable Disable Function Enables or disables the translation of multiple source MAC addresses and SAPs that are addressed to the same destination MAC to one virtual SAP If you configured frame relay BNN and DLSw on this interface and you enable this parameter multiple clients with different source MAC addresses can use the same frame relay SVC to send information to a specific destination MAC address To direct multiple client connection requests to a single destination MAC address over a single SVC frame relay maps the source MAC and source SAP to a unique virtual SAP Each SVC can support up to 63 connections SAPs If this maximum number of SAPs is reached a new SVC is created At the receiving side the virtual SAPs are converted and the source MAC address is automatically created Instructions Select Enable if you configured frame relay BNN SVC service and DLSw on this LLC2 interface and you want to direct multiple client connection requests for a single destination MAC address to a single SVC configured on this interface Otherwise accept the default Disable MIB Object ID 1 3 6 1 4 1 18 3 5 1 6 2 1 31 308635 15 1 Rev 00 A 19 Appendix B Monitoring LLC Using the BCC show Commands To display configuration
20. Apply 7 Click on Done You return to the Configuration Manager window Configuring LLC2 Inbound Traffic Filters For descriptive and procedural information about inbound traffic filters for LLC and any other protocols that support this capability refer to Configuring Traffic Filters and Protocol Prioritization Deleting LLC2 from an Interface The following sections describe how to remove LLC2 from an interface using the BCC or Site Manager Using the BCC To delete LLC2 from a router interface navigate to the LLC2 interface prompt for example box ethernet 2 1 llc2 and enter delete For example the following command removes LLC2 from a router interface 11c2 ethernet 2 184 delete ethernet 2 1H 308635 15 1 Rev 00 4 21 Configuring LLC Services Using Site Manager To delete an LLC2 interface from its associated physical circuit complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose LLC2 The LLC2 menu opens Choose Interfaces The LLC2 Interface Configuration window opens Select the LLC2 interface that you want to delete Click on Delete Site Manager deletes the LLC2 entry that you selected Click on Done You return to the Configuration Manager window Deleting LLC2 from the Router The following sect
21. Interfaces 255 logical connections 4 to 5000 Specifies the maximum number of logically independent end to end connections that the local LLC2 interface can allocate Enter any valid number of end to end connections from 4 through 5000 Choose an appropriate value for the aggregate performance requirements of all the applications that this LLC2 interface supports Be aware that higher settings reduce the amount of available memory 1 3 6 1 4 1 18 3 5 1 6 2 1 20 308635 15 1 Rev 00 Configuring LLC Services Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Frame Relay Virtual MAC Address Mask Configuration Manager gt Protocols gt LLC2 gt Interfaces 0x400000FF Octal string Specifies the upper 2 to 4 bytes of a virtual destination MAC address The lower remaining bytes specify the DLCI to be used Select a mask that is unique within your network The mask should be the upper 2 to 4 bytes of a standard MSB token ring MAC address 1 3 6 1 4 1 18 3 5 1 6 2 1 26 Virtual Ring Number hex Configuration Manager gt Protocols gt LLC2 gt Interfaces 0x0 0x0 to Oxfff Indicates a ring number for LLC to use if you configure APPN with source route bridging The ring number must be unique in the SRB network Select a hexadecimal number from 0x1 through Oxfff that is unique in your SRB network 1 3
22. LECI Connecionloss Serice arisini a dod pini a be ia T 1 8 LLC2 Connection Oriented Service ssssssseeeseeeeeeennennnns 1 8 LLG Operation TYPES e 1 9 Toe OPTA arr AE E AEE 1 9 THS d OPOE eT RIP 1 9 HRaSIt api PL 1 10 LEG Protocol Data Unit Formats sranie innsean a Rea Una a d acaba 1 11 Destinator SAP DSAP acsusqussutabh bti zebta euo a rbd ue ako ni ee 1 11 tQ de udo coil A 1 12 SAP Addressing Scheme ati ce std enc rica tia dues vare inated da RA d EL R c ADM ALBI REE 1 12 308635 15 1 Rev 00 V BETA 6 Ezio MN 1 14 One Field FOMA E S L0 T ES 1 16 aano eula M E 1 20 Chapter 2 LLC2 Routed over Frame Relay Compatibility nimi RFG TIIG socrii inaia a EaSI 2 1 Compatibility with IBM NCP 7 1 and Eater 1 d enr a 2 2 gua 3a ir jaee tete T ES 2 4 Mapping DLCIS to MAU Addresses 4c to baeo cbe indecent Hx ead boli enticed 2 4 Router Mapping Examples ee 2 5 Virtual MAC Address to Frame Relay DLCI 2 nhet tne enun 2 6 Frame Relay DLCI to Virtual MAC Address cccescceeesceeeeneeeeeeeeeeeeeteaeeeeteeesaes 2 7 Physical MAC Address to Frame Relay DLCI see 2 8 Frame Relay DLCI to Physical MAC Address esee 2 9 Frame Relay DECI ta Frame Relay DEG 1 creen hr comer es Siva etia cras 2 10 LLC2 over Frame Relay Routed versus Bridged sesessseeeeeese 2 12 Chapter 3 Starting LLC Services Stating MCN TERIS Lue voce di de
23. Modulo 128 operation allows a maximum window size of 127 For example with a window size of 7 a link station can transmit frames 0 through 6 before requiring acknowledgment from the receiving station The sending station will not send more frames until it receives an acknowledgment Specifying the Maximum Number of Received Information PDUs The following sections describe how to specify the maximum number of unacknowledged information PDUs that LLC can receive using the BCC or Site Manager Using the BCC To specify the maximum number of unacknowledged information PDUs that LLC can receive navigate to the LLC2 interface prompt for example box ethernet 2 1 Ilc2 and enter receive window lt PDUs gt PDUs is the maximum number of unacknowledged information PDUs that LLC can receive You can enter a value from 1 through 127 For example the following command changes the maximum number of unacknowledged information PDUs to 10 llc2 ethernet 2 184 receive window 10 llc2 ethernet 2 1H 4 4 308635 15 1 Rev 00 Customizing LLC Services Using Site Manager To specify the maximum number of unacknowledged information PDUs that LLC can receive complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose LLC2 The LLC2 menu opens 3 Choose Interfaces The LLC2 Interface Configuration window o
24. NetBIOS PCs use LLC when they establish sessions through a LAN topology SNA and NetBIOS need LLC2 connection oriented circuits to provide higher layer sequencing and error control in bridged LAN environments LLC2 works much like SDLC for packet sequencing and acknowledgment Unlike SDLC it does not impose unbalanced primary secondary relationships between communicating nodes Any LLC station can initiate a peer to peer conversation with any other LLC station Supported Connections You configure LLC2 on any interface requiring local termination including e APPN interfaces e DLSw interfaces When you connect over an IP backbone in dual switch DLSw configurations the interface attached to the IP backbone does not use LLC2 When you connect over an LLC2 backbone in DLSw single switch configurations the interface attached to the backbone uses LLC2 e Token ring interfaces running LNM 1 2 308635 15 1 Rev 00 Logical Link Control Overview You can enable LLC2 on any LAN or WAN interface that supports APPN DLSw and LNM including LAN interfaces Token ring Ethernet Other LAN media supporting source route bridging SRB including Fiber Distributed Data Interface FDDI WAN interfaces Frame relay Boundary Network Node BNN and Boundary Access Node BAN interfaces Any other WAN media supporting source route bridging traffic including Point to Point Protocol PPP Frame Relay Support Fig
25. address or both Incoming LLC2 packets such as LAN packets are checked against the entries in this table If a match occurs the router forwards the frame only to the DLCI specified If no entry is found then the information is not forwarded out this interface as a BNN packet 308635 15 1 Rev 00 3 13 Configuring LLC Services Using the BCC To configure DLSw and LLC2 on a frame relay BNN interface using PVCs you first configure DLSw global attributes Then you configure frame relay LLC2 and DLSw on that interface For example to configure DLSw and LLC2 on a frame relay BNN PVC interface over a Serial line with default settings 1 In configuration mode navigate to the box or stack prompt 2 Configure DLSw global attributes box disw dlsw 3 Specify a slot for the IP interface and the IP address to use for TCP connections based on this slot For example to configure slot 3 with an IP address of 1 1 1 3 enter dlswit slot ip 3 ip addr 1 1 1 3 slot ip 3 4 Return to the box or stack prompt slot ip 3 box box 5 Add aserial interface on which you want to configure frame relay LLC2 and DLSw box serial 3 1 serial 3 1 6 Configure frame relay on the serial interface serial 3 1 frame relay frame relay 3 1 7 Configure a service name on the frame relay interface frame relay 3 1 service service1 service servicel 8 Add LLC2 to the frame relay service service servicel llc2
26. breach of the license by Customer or in the event designated hardware or CFE is no longer in use Customer will promptly return the Software to Nortel Networks or certify its destruction Nortel Networks may audit by remote polling or other reasonable means to determine Customer s Software activation or usage levels If suppliers of third party software included in Software require Nortel Networks to include additional or different terms Customer agrees to abide by such terms provided by Nortel Networks with respect to such third party software 2 Warranty Except as may be otherwise expressly agreed to in writing between Nortel Networks and Customer Software is provided AS IS without any warranties conditions of any kind NORTEL NETWORKS DISCLAIMS ALL WARRANTIES CONDITIONS FOR THE SOFTWARE EITHER EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ANY WARRANTY OF NON INFRINGEMENT Nortel Networks is not obligated to provide support of any kind for the Software Some jurisdictions do not allow exclusion of implied warranties and in such event the above exclusions may not apply 3 Limitation of Remedies INNO EVENT SHALL NORTEL NETWORKS OR ITS AGENTS OR SUPPLIERS BE LIABLE FOR ANY OF THE FOLLOWING a DAMAGES BASED ON ANY THIRD PARTY CLAIM b LOSS OF OR DAMAGE TO CUSTOMER S RECORDS FILES OR DATA OR c DIRECT INDIRECT SPECIAL INCIDENTAL PUNITIVE
27. for LLC Clients SAP addresses are as follows Individual Designates a single SAP The individual address is usable as both an SSAP and a DSAP The individual SAP has an address designation bit value of 0 Group Designates a group of DSAPs The group DSAP has an address designation bit value of 1 Global Designates a group consisting of all DSAPs that the underlying MAC SAP addresses actively service The global DSAP has a value of all 1s Null Designates the SAP of the underlying MAC sublayer and does not identify any SAP to either the network layer or to an associated layer management function The null address is usable as both an SSAP and a DSAP The null SAP has a value of all Os 308635 15 1 Rev 00 Configuring LLC Services Control Field The control field consists of one or two octets that designate command and response functions It also contains sequence numbers when required The format of the control field of the LLC PDU defines the type of operation type 1 versus type 2 Information an I format PDU e Supervisory an S format PDU e Unnumbered a U format PDU Figure 1 7 shows the three control field formats 308635 15 1 Rev 00 Logical Link Control Overview 1 8 2 1 7 ad eR mH Send sequence number Receive sequence number format PDU information transfer commands responses S format PDU supervisory commands responses x lt U format PDU unnumbered comma
28. for the busy timer and the poll cycle timer parameters to 25 llc2 ethernet 2 1 ack xmt timer 5 reject timer 5 busy timer 25 poll cycle timer 25 Using Site Manager To configure LLC2 timers complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose LLC2 The LLC2 menu opens 3 Choose Interfaces The LLC2 Interface Configuration window opens 4 Click on the interface that you want to customize 5 Set the following parameters e Ack Timer for Xmt Reject Timer Busy Timer Inactivity Timer Click on Help or see the parameter descriptions beginning on page A 15 6 Click on Apply 7 Click on Done You return to the Configuration Manager window 308635 15 1 Rev 00 Customizing LLC Services Specifying the Maximum Number of PDU Retries After Timeout The following sections describe how to specify the maximum number of times that a PDU can be sent following expiration of a transmit acknowledgment or reject timer You can complete these tasks using the BCC or Site Manager Using the BCC To specify the maximum number of times that a PDU can be sent following expiration of the transmit acknowledgment timer or the reject timer navigate to the LLC2 interface prompt for example box ethernet 2 1 Ilc2 and enter n2 number of retransmissions number of retran
29. ip routes but not both This guide uses the following acronyms ANSI APPN ATM BAN BNI BNN DLCI DLSw DM DNA DSAP DSPU FDDI FEP FR FRAD FRMR American National Standards Institute Advanced Peer to Peer Networking asynchronous transfer mode Boundary Access Node Boundary Node Identifier Boundary Network Node data link connection identifier data link switching disconnected mode data network address destination service access point downstream physical unit Fiber Distributed Data Interface front end processor frame relay Frame Relay Access Device frame reject 308635 15 1 Rev 00 XV Configuring LLC Services TEEE IP ISO ITU T LAN LANE LEC LLC LNM LSAP LSDU MAC MSB NCP NetBIOS OSI PDU PPP PVC RFC RNR RR SABME SAP SDLC SNA SR SRB Institute of Electrical and Electronic Engineers Internet Protocol International Organization for Standardization International Telecommunication Union Telecommunication Standardization sector formerly CCITT local area network LAN emulation LAN emulation client Logical Link Control LAN Network Manager link service access point link service data unit media access control most significant byte Network Communications Program Network Basic Input Output System Open Systems Interconnection protocol data unit Point to Point Protocol permanent virtual circuit Request for Comments receiver not ready receiver ready set asy
30. or TEST command PDU For example the following command changes the maximum number of SAPs allowed on the LLC2 interface to 100 1l1c2 ethernet 2 14 max saps 100 308635 15 1 Rev 00 Customizing LLC Services Customizing LLC2 over Frame Relay The following section describes how to customize LLC2 over frame relay using the BCC or Site Manager Configuring the Frame Relay Virtual MAC Address Mask The frame relay virtual MAC address mask specifies the upper 2 to 4 bytes of a virtual destination MAC address The lower remaining bytes specify the DLCI to be used Using the BCC To configure the frame relay virtual MAC address mask navigate to the LLC2 interface prompt for example box serial 3 1 frame relay service service1 Ilc2 and enter fr virtual mask lt mask gt mask specifies the upper 2 to 4 bytes of a virtual destination MAC address The lower remaining bytes specify the DLCI to be used Select a mask that is unique within your network The mask should be the upper 2 to 4 bytes of a standard MSB token ring MAC address For example to set a mask of 0x400000FF enter 11c2 serviceis fr virtual mask 0x400000FF llc2 servicelts 308635 15 1 Rev 00 4 13 Configuring LLC Services Using Site Manager To configure the frame relay virtual MAC address mask complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Pro
31. source route bridging see Configuring Bridging Services Navigate to the box or stack prompt and configure a token ring interface For example enter srb box box token ring slot 3 connector 1 token ring 3 1 Add source route bridging SRB to the interface For example enter token ring 3 1 srb interface ring id 0x1 srb token ring 3 1 Add LLC2 to the interface srb token ring 3 1 llc2 11c2 token ring 3 14 308635 15 1 Rev 00 3 5 Configuring LLC Services Configuring LLC2 on an FDDI Interface To configure LLC2 on an FDDI interface with default values 1 In configuration mode navigate to the box or stacks prompt 2 If source route bridging is not yet configured on the router you must configure it globally before you can add LLC2 to an FDDI interface For example the following command enables source routing services on the router with a bridge ID value of 0x10 and a LAN ID value of 0x100 stack srb bridge id 0x10 internal lan id 0x100 srb Note For complete information about how to configure source route bridging see Configuring Bridging Services 3 Navigate to the box or stack prompt and configure an FDDI interface For example enter stack fddi slot 4 connector 1 fddi 4 1 4 Add SRB to the interface For example enter fddi 4 1 srb interface ring id 0x1 srb fddi 4 1 5 Add LLC2 to the interface srb fddi 4 1 Ile2 11 c2 ddi 4 1 3 6 308635 15 1 Rev 00
32. starting 3 4 LLC2 over ATM Lane starting 3 8 Local MAC parameter A 8 Logical Link Control LLC and SNA protocols 1 2 classes of service in 1 7 to 1 9 functionality of 1 10 overview of 1 1 protocols requiring 1 1 Site Manager parameter descriptions A 1 types of operations in 1 9 MAC Address parameter A 3 MAC addresses real and virtual 2 4 mapping DLCIs to MAC addresses 2 4 to 2 11 Mapping Type parameter A 4 mask for frame relay MAC address A 18 Max Links parameter A 17 Max Octets in I parameter A 12 Max Octets in UI parameter A 12 Max Retry After TimeOut parameter A 14 NCP compatibility 2 2 Numbering Plan parameter A 5 308635 15 1 Rev 00 O operation types numbered acknowledged type 2 1 9 unnumbered unacknowledged type 1 1 9 overview of LLC services supported 1 1 P parameters Ack Timer for Xmt A 15 Busy Timer A 16 descriptions A 1 DLCI A 7 Enable global A 10 Enable interface A 11 Frame Relay Virtual MAC Address Mask A 18 Inactivity Timer A 17 Local MAC A 8 MAC Address A 3 Mapping Type A 4 Max Links A 17 Max Octets in I A 12 Max Octets in UI A 12 Max Retry After TimeOut A 14 Numbering Plan A 5 Receive Window A 13 Reject Timer A 16 Remote MAC A 8 Send Window A 14 Sub Addr A 4 Type of Number A 5 Virtual Ring Number A 18 X121 Addr A 4 PDU formats SAP addressing scheme for 1 11 to 1 13 physical MAC to frame relay addressing 2 8 product s
33. that is appropriate for the applications that LLC2 supports Refer to the various MAC descriptions to determine the precise value that you should specify for the given medium All MACs must be capable of accommodating I format PDUs with information fields up to 5128 octets in length 1 3 6 1 4 1 18 3 5 1 6 2 1 9 308635 15 1 Rev 00 Site Manager Parameters Parameter Receive Window Path Configuration Manager gt Protocols gt LLC2 gt Interfaces Default 7 PDUs Options 1 to 127 Function Specifies the maximum number of unacknowledged information PDUs that LLC can receive LLC drops frames it receives outside this window and recovers them via timers Instructions Enter any valid value from 1 through 127 LLC PDUs For sessions that do not negotiate XIDs SNA PU 2 0 and NetBIOS set the router receive window to the largest end station s send window If the receive window is too small the router discards frames it receives outside this window Timers recover these frames and dropping these frames degrades performance On a mainframe s front end processor the Max Out parameter in the NCP controls the front end s transmit window Therefore if the Max Out parameter in the NCP is set to 127 you should set the router Receive Window parameter to 127 For sessions that negotiate XIDs SNA PU 2 1 the receive window is set dynamically during connection establishment The router uses the value specified here as an upper lim
34. 0 LLC2 Routed over Frame Relay SNA host a jw W E IBM communications controller with NCP No router required Frame relay network Nortel Networks router with DLSw or APPN LLC007A Figure 2 1 Sample Frame Relay Network Using LLC2 308635 15 1 Rev 00 2 3 Configuring LLC Services FRAD like Functionality Token ring Ethernet and SDLC end stations communicate with a frame relay attached host via Frame Relay Access Devices FRADs The Nortel Networks router with DLSw operating in single switch mode has FRAD like capability supporting token ring Ethernet and SDLC end stations The router performs the following actions e Terminates the data link control level sessions e Strips the link level header off the SNA packet e Puts an RFC 1490 LLC header on the SNA packet e Sends packets into the frame relay network Mapping DLCIs to MAC Addresses The frame relay network provides a number of permanent virtual circuits PVCs that connect devices attached to the same frame relay network Each virtual circuit is uniquely identified at each frame relay interface by a DLCI The frame relay interface allows either group or direct single assignment of DLCIs Group assignment allows many DLCIs per circuit direct assignment allows only one The system administrator or frame relay provider ass
35. 00 1 11 Configuring LLC Services Source SAP SSAP The SSAP address field identifies the specific service access point that initiated the PDU The SSAP field contains 7 bits of actual address and 1 command response identifier bit to indicate that the LLC PDU is a command C PDU or a response R PDU as shown in Figure 1 5 Command response identifier bit SSSSSSS C R Figure 1 5 SSAP Address Field LLC0004A A value of 0 for the command response identifier bit indicates that the PDU is a command PDU A value of 1 for the command response identifier bit indicates that the PDU is a response PDU SAP Addressing Scheme All 802 2 LLC protocols provide a SAP addressing scheme that lets multiple applications and protocol entities in a single machine share a MAC address Popular network protocols such as LAN Network Manager NetBIOS and SNA all have published SAP addresses but any application can use a SAP to send or receive data via the LLC sublayer The LLC SAP function sorts frames coming up from the MAC layer and directs them to the appropriate application or protocol software entity Figure 1 6 illustrates some SAPs published for NetBIOS and SNA The xx in the last column denotes all other published and unpublished SAPs 308635 15 1 Rev 00 Logical Link Control Overview SNA NetBIOS path control LAN network managemt For LAN Used by DLSw attached devices and APPN LLC0005A Figure 1 6 SAPs
36. 15 configuring using BCC and SVCs 3 17 3 18 Index 1 DLSw and LLC2 over Frame Relay BNN continued configuring using Site Manager and PVCs 3 15 3 16 configuring using Site Manager and SVCs 3 19 with PVCs 3 13 with SVCs 3 17 E Edit LLC2 Global Parameters window A 9 Enable global parameter A 10 Enable interface parameter A 11 F FRAD frame relay access device use of in LLC2 2 2 2 4 frame relay 1 3 to 1 6 frame relay mappings editing 4 17 4 19 frame relay to frame relay addressing 2 10 frame relay to physical MAC addressing 2 9 frame relay to virtual MAC addressing 2 7 Frame Relay Virtual MAC Address Mask parameter A 18 IBM NCP compatibility 2 2 Inactivity Timer parameter A 17 inbound traffic filters editing 4 21 information field formats 1 20 interface parameters Ack Timer for Xmt A 15 Busy Timer A 16 Enable interface A 11 Frame Relay Virtual MAC Address Mask A 18 Inactivity Timer A 17 Max Links A 17 Max Octets in I A 12 Max Octets in UI A 12 Max Retry After TimeOut A 14 Receive Window A 13 Reject Timer A 16 Send Window A 14 Index 2 Virtual Ring Number A 18 L LECZ show llc2 commands B 1 LLC2 Configuration Hierarchy 3 2 LLC2 Frame Relay PVC Mapping Add window A 7 LLC2 Frame Relay PVC Mappings window A 9 LLC2 Frame Relay SVC Mapping Add window A 3 LLC2 Frame Relay SVC Mappings window A 6 LLC2 Interface Configuration window A 11 LLC2 on a router
37. 3 4 92 966 968 800 4NORTEL or 800 466 7835 61 2 9927 8800 Europe Middle East and Africa North America Asia Pacific China 800 810 5000 n OA l MUM 308635 15 1 Rev 00 xvii Configuring LLC Services Additional information about the Nortel Networks Technical Solutions Centers is available from the www nortelnetworks com help contact global URL An Express Routing Code ERC is available for many Nortel Networks products and services When you use an ERC your call is routed to a technical support person who specializes in supporting that product or service To locate an ERC for your product or service go to the http www 130 nortelnetworks com cgi bin eserv common essContactUs jsp URL xviii 308635 15 1 Rev 00 Chapter 1 Logical Link Control Overview LLC is a standard protocol within the ITU T formerly CCITT 8802 2 and IEEE 802 x family of LAN standards Connection oriented protocols including IBM Systems Network Architecture SNA and NetBIOS use LLC services Connection oriented protocols do not have a network layer address such as an IP subnet to route information Instead before any information transfer occurs a device on the network sends a broadcast or explorer frame to locate the session partner From this broadcast the network establishes a path for the data transfer LLC2 traffic is generally sensitive to excessive network delays causing probl
38. 308635 15 1 Rev 00 4 19 Configuring LLC Services Configuring the LLC Virtual Ring Number for APPN with SRB If an LLC interface is configured for APPN with source route bridging you may need to specify the virtual ring number for LLC to use The ring number must be unique in the SRB network Using the BCC To specify a ring number for LLC to use if you configure APPN with source route bridging navigate to the LLC2 interface prompt for example box ethernet 2 1 Ilc2 and enter srb ring id ring D ring ID is the ring number from 0x1 through Oxfff For example the following command sets the ring number for this LLC2 interface to 0x10 llc2 ethernet 2 1 Srb ring id 0x10 llc2 ethernet 2 1 Using Site Manager To specify a ring number for LLC to use if you configure APPN with source route bridging complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose LLC2 The LLC2 menu opens 3 Choose Interfaces The LLC2 Interface Configuration window opens 4 Click on the interface that you want to customize 5 Setthe Virtual Ring Number hex parameter Click on Help or see the parameter description on page A 18 continued 4 20 308635 15 1 Rev 00 Customizing LLC Services Site Manager Procedure continued You do this System responds 6 Click on
39. 5 1 Rev 00 3 15 Configuring LLC Services Site Manager Procedure continued You do this 4 Choose DLSw When you choose DLSw you automatically choose LLC2 System responds 5 Click on OK The Frame Relay SNA Connection window opens 6 Click on BNN PVC The DLSw Basic Global Parameters window opens 7 Set the following parameters e DLSw RFC Version e DLSw Virtual Ring ID hex DLSw Peer IP Address dual switch networks only Click on Help or see Configuring DLSw Services for parameter descriptions 8 Click on OK The DLSw Basic Interface Parameters window opens 9 Set the DLSw Slot IP Address parameter Click on Help or see Configuring DLSw Services for parameter descriptions 10 Click on OK The LLC2 Frame Relay PVC Mappings window opens 11 Click on Add The LLC2 Frame Relay PVC Mapping Add window opens 12 Set the following parameters DLCI Remote MAC Local MAC Click on Help or see the parameter descriptions beginning on page A 7 13 Click on OK You return to the LLC2 Frame Relay PVC Mappings window 14 Click on Done You return to the Configuration Manager window 308635 15 1 Rev 00 Starting LLC Services Starting DLSw and LLC2 on a Frame Relay BNN SVC Interface If you use SVCs to connect two devices over the network you do not configure virtual circuits An SVC is created only when there is data to transfer For SVCs the frame relay
40. 64 64 hex 100 decimal Remote host 2 400000FF0065 65 hex 101 decimal PC MAC 400000000003 Frame relay O S DLSw Router A Router B Connection request Source MAC smac PC MAC Destination MAC dmac remote host 1 or 2 Figure 2 2 Virtual MAC to Frame Relay Topology DLCI 100 LLC0008A 2 6 308635 15 1 Rev 00 LLC2 Routed over Frame Relay Frame Relay DLCI to Virtual MAC Address Figure 2 3 illustrates a sample frame relay DLCI to virtual MAC address mapping In this network hosts 1 and 2 can make connection requests to the PC The workstation administrator has control over the PC configuration and has configured the remote host addresses as virtual MAC addresses corresponding to the DLCIS assigned to the hosts At router B a mapping table maps the DLCIs for hosts 1 and 2 to the PC MAC address Router B first creates a connection request with the source MAC addresses equal to the virtual MAC address corresponding to the DLCIs for hosts 1 and 2 Router B then creates a connection request with the destination MAC equal to the local MAC address from the mapping table Router B always sets the source MAC address equal to the virtual MAC address even when a remote MAC address is configured in the mapping table Configuration at PC Remote host 1 400000FF0064 64 hex 100 decimal Remote host 2 400000FF0065 65 hex 101 decimal PC MAC 400000000003
41. BayRS Version 15 1 Part No 308635 15 1 Rev 00 October 2001 600 Technology Park Drive Billerica MA 01821 4130 Configuring LLC Services NORTEL NETWORKS Copyright 2001 Nortel Networks All rights reserved October 2001 The information in this document is subject to change without notice The statements configurations technical data and recommendations in this document are believed to be accurate and reliable but are presented without express or implied warranty Users must take full responsibility for their applications of any products specified in this document The information in this document is proprietary to Nortel Networks Inc The software described in this document is furnished under a license agreement and may only be used in accordance with the terms of that license The software license agreement is included in this document Trademarks Nortel Networks the Nortel Networks logo the Globemark and Unified Networks are trademarks of Nortel Networks Adobe and Acrobat Reader are trademarks of Adobe Systems Incorporated Advanced Peer to Peer Networking APPN IBM and NetView are trademarks of International Business Machines Corporation The asterisk after a name denotes a trademarked item Restricted Rights Legend Use duplication or disclosure by the United States Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFA
42. C2 it is no longer available on the router Using the BCC To disable LLC2 on the router navigate to the global LLC2 prompt and enter disable To reenable LLC2 navigate to the global LLC2 prompt and enter enable 308635 15 1 Rev 00 4 1 Configuring LLC Services For example the following command sequence disables and reenables LLC2 on the router box Ile2 11c24 disable 11 c2 info state disabled 11c24 enable 11c2 info state enabled llc2 Using Site Manager To disable or reenable LLC2 on the router complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose LLC2 The LLC2 menu opens 3 Choose Global The Edit LLC2 Global Parameters window opens 4 Setthe Enable parameter Click on Help or see the parameter description on page A 10 5 Click on OK You return to the Configuration Manager window Customizing an LLC2 Interface You customize LLC2 interface parameters for specific clients such as DLSw and LAN Network Manager LNM You can configure these and other LLC2 clients on the same physical circuits and therefore they can share the same LLC interfaces In such cases you can devise a profile of LLC2 parameter settings that satisfy the combined recommendations of the LLC2 clients 308635 15 1 Rev 00 Customizing LLC Services Disabling an
43. ED WARRANTIES INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE In addition the program and information contained herein are licensed only pursuant to a license agreement that contains restrictions on use and disclosure that may incorporate by reference certain limitations and notices imposed by third parties ii 308635 15 1 Rev 00 Nortel Networks Inc Software License Agreement This Software License Agreement License Agreement is between you the end user Customer and Nortel Networks Corporation and its subsidiaries and affiliates Nortel Networks PLEASE READ THE FOLLOWING CAREFULLY YOU MUST ACCEPT THESE LICENSE TERMS IN ORDER TO DOWNLOAD AND OR USE THE SOFTWARE USE OF THE SOFTWARE CONSTITUTES YOUR ACCEPTANCE OF THIS LICENSE AGREEMENT If you do not accept these terms and conditions return the Software unused and in the original shipping container within 30 days of purchase to obtain a credit for the full purchase price Software is owned or licensed by Nortel Networks its parent or one of its subsidiaries or affiliates and is copyrighted and licensed not sold Software consists of machine readable instructions its components data audio visual content such as images text recordings or pictures and related licensed materials including all whole or partial copies Nortel Networks grants you a license to use the Software only in the country wh
44. Enable Disable Function Enables or disables the LLC2 interface added previously to this physical circuit Instructions Select Enable if you disabled this LLC2 interface previously and now want to reenable the interface on its associated physical circuit Select Disable if you want to disable this LLC2 interface on its associated physical circuit MIB Object ID 1 3 6 1 4 1 18 3 5 1 6 2 1 2 308635 15 1 Rev 00 Configuring LLC Services Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Max Octets in UI Configuration Manager gt Protocols gt LLC2 gt Interfaces 5128 octets 1 to 5128 Specifies in octets the maximum size of an unnumbered information UI PDU that this LLC2 interface sends or receives Enter a valid value from 1 octet 8 bits to 5128 octets Choose a value that is appropriate for the applications that LLC2 supports The LLC sublayer imposes no restrictions However all MAC sublayers must be capable of accommodating UI PDUs with information fields up to 128 octets in length 1 3 6 1 4 1 18 3 5 1 6 2 1 6 Max Octets in I Configuration Manager gt Protocols gt LLC2 gt Interfaces 5128 octets 1 to 5128 Specifies in octets the size of an information I PDU that this LLC2 interface sends or receives Enter any valid value from 1 octet 8 bits to 5128 octets Choose a value
45. I I SR over FR End station End station LLC0013A Figure 2 7 RFC 1490 Bridging and Routing Standards for SNA 2 12 308635 15 1 Rev 00 Chapter 3 Starting LLC Services This chapter describes how to create a basic LLC configuration by specifying values for required parameters only and accepting default values for all other parameters When you start LLC2 over frame relay with APPN and DLSw you must specify the frame relay mapping parameters the Configuration Manager sets default values for all other parameters Topic Page Starting Configuration Tools 3 2 LLC2 Configuration Hierarchy 3 2 Starting LLC2 on a LAN Interface 3 4 Starting LLC2 over ATM LANE 3 8 Starting DLSw and LLC2 over Frame Relay 3 10 Starting APPN and LLC2 over Frame Relay 3 21 For background information about LLC see Chapter 1 Logical Link Control Overview and Chapter 2 LLC2 Routed over Frame Relay After you create an initial configuration you can customize LLC parameters as described in Chapter 4 Customizing LLC Services 308635 15 1 Rev 00 3 1 Configuring LLC Services Starting Configuration Tools Before you configure LLC services refer to the following user guides for instructions on how to start and use the Nortel Networks configuration tool of your choice Configuration Tool User Guide
46. Ilc2 command B 1 Boundary Access Node BAN 1 6 Boundary Network Node BNN 1 5 PVC support 1 5 SVC support 1 5 Busy Timer parameter A 16 C classes of service 1 7 to 1 9 connection oriented class 2 1 8 to 1 9 connectionless class 1 1 8 command PDUs disconnect DISC 1 19 exchange identification XID 1 17 frame reject FRMR 1 19 information I 1 18 receiver not ready RNR 1 18 receiver ready RR 1 18 reject REJ 1 18 set asynchronous balanced mode extended SABME 1 18 test TEST 1 17 unnumbered information UI 1 17 308635 15 1 Rev 00 Index configuring parameters in PDU control field 1 14 to 1 16 control field formats information I 1 14 to 1 16 supervisory S 1 14 to 1 16 unnumbered U 1 14 to 1 16 control field parameters poll final bit 1 15 1 16 receive sequence number bit 1 15 1 16 send sequence number bit 1 15 1 16 conventions text xiv customer support xvii D deleting LLC2 from a single interface using BCC 4 22 using Site Manager 4 22 from all interfaces using BCC 4 22 using Site Manager 4 22 disabling LLC2 services using BCC 4 1 using Site Manager 4 2 DLCI parameter A 7 DLCIs mapping to MACs 2 4 to 2 11 DLSw and LLC2 over Frame Relay BAN configuring using BCC 3 10 3 11 configuring using Site Manager 3 12 3 13 DLSw and LLC2 over Frame Relay BNN and local mapping 3 17 and remote mapping 3 17 configuring using BCC and PVCs 3 13 to 3
47. OR CONSEQUENTIAL DAMAGES INCLUDING LOST PROFITS OR SAVINGS WHETHER IN CONTRACT TORT OR OTHERWISE INCLUDING NEGLIGENCE ARISING OUT OF YOUR USE OF THE SOFTWARE EVEN IF NORTEL NETWORKS ITS AGENTS OR SUPPLIERS HAVE BEEN ADVISED OF THEIR POSSIBILITY The forgoing limitations of remedies also apply to any developer and or supplier of the Software Such developer and or supplier is an intended beneficiary of this Section Some jurisdictions do not allow these limitations or exclusions and in such event they may not apply 308635 15 1 Rev 00 iii General a If Customer is the United States Government the following paragraph shall apply All Nortel Networks Software available under this License Agreement is commercial computer software and commercial computer software documentation and in the event Software is licensed for or on behalf of the United States Government the respective rights to the software and software documentation are governed by Nortel Networks standard commercial license in accordance with U S Federal Regulations at 48 C F R Sections 12 212 for non DoD entities and 48 C F R 227 7202 for DoD entities Customer may terminate the license at any time Nortel Networks may terminate the license if Customer fails to comply with the terms and conditions of this license In either event upon termination Customer must either return the Software to Nortel Networks or certify its destruction Customer is responsible for paym
48. Protocols menu opens 2 Choose LLC2 The LLC2 menu opens 3 Choose Interfaces The LLC2 Interface Configuration window opens 4 Click on the interface that you want to customize 5 Setthe Send Window parameter Click on Help or see the parameter description on page A 14 6 Click on Apply 7 Click on Done You return to the Configuration Manager window Specifying the Unnumbered Information and Information PDU Sizes Using the BCC The following sections describe how to specify the UI and I PDU sizes using the BCC or Site Manager To specify the UI and I PDU sizes navigate to the LLC2 interface prompt for example box ethernet 2 1 Ilc2 and enter the following commands max ui size ui size max info size info size ui sizeis the maximum size in octets of an unnumbered information PDU this LLC2 interface sends or receives You can enter a value from 1 through 5128 4 6 308635 15 1 Rev 00 Customizing LLC Services info_size is the maximum size in octets of an information PDU that this LLC2 interface sends or receives You can enter a value from 1 through 5128 For example the following command changes the maximum size of the UI PDUs and I PDUs to 4000 and 3000 respectively 11c2 ethernet 2 14 max ui size 4000 max info size 3000 Using Site Manager To specify the UI PDU and I PDU size complete the following tasks Site Manager Procedure
49. RS 252 227 7013 Notwithstanding any other license agreement that may pertain to or accompany the delivery of this computer software the rights of the United States Government regarding its use reproduction and disclosure are as set forth in the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 Statement of Conditions In the interest of improving internal design operational function and or reliability Nortel Networks Inc reserves the right to make changes to the products described in this document without notice Nortel Networks Inc does not assume any liability that may occur due to the use or application of the product s or circuit layout s described herein Portions of the code in this software product may be Copyright 1988 Regents of the University of California All rights reserved Redistribution and use in source and binary forms of such portions are permitted provided that the above copyright notice and this paragraph are duplicated in all such forms and that any documentation advertising materials and other materials related to such distribution and use acknowledge that such portions of the software were developed by the University of California Berkeley The name of the University may not be used to endorse or promote products derived from such portions of the software without specific prior written permission SUCH PORTIONS OF THE SOFTWARE ARE PROVIDED AS IS AND WITHOUT ANY EXPRESS OR IMPLI
50. Topology eeeeeemee 2 6 Figure 2 3 Frame Relay to Virtual MAC Topology seeeeeem 2 7 Figure 2 4 Physical MAC to Frame Relay Topology eeeenmmm 2 8 Figure 2 5 Frame Relay to Physical MAC Topology seem 2 10 Figure 2 6 Frame Relay to Frame Relay Topology esee 2 11 Figure 2 7 RFC 1490 Bridging and Routing Standards for SNA 2 12 Figure 3 1 LLC2 Configuration HIBCBICNV au ic reader ata eausa cuu hn REA egi ckan Rn 3 2 Figure A 1 LLC2 Frame Relay SVC Mapping Add Window eeseses A 3 Figure A 2 LLC2 Frame Relay SVC Mappings Window seen A 6 Figure A 3 LLC2 Frame Relay PVC Mapping Add Window eseees A 7 Figure A 4 LLC2 Frame Relay PVC Mappings Window eem A 9 Figure A 5 Edit LLC2 Global Parameters Window sseeeseeeeeennene A 9 Figure A 6 LLC2 Interface Configuration Window eseseeeneeeee ACT 308635 15 1 Rev 00 ix Tables Table 1 1 DEC Command PILIS 22 outs terse a eles pr eevee lees 1 10 Table 1 2 PDU Format and EOPODON 1i oiu ete dist eec da uds Rod uat ede ne chu Ed 1 16 Table 1 3 Control Field Bits and PUMCUGINE derit inas 1 16 Table 1 4 Command and Response PDU Names and Definitions 1 17 Table 4 1 BCC Fine Tuning Parameters for LLC2 Int
51. and statistical data about LLC2 from the management information base MIB use the BCC show llc2 command This appendix includes descriptions of the following show commands Command Page show Ilc2 all B 3 show Ilc2 dici B 5 show llc2 fr svc B 6 show llc2 interfaces B 7 show llc2 links B 8 show llc2 summary B 8 308635 15 1 Rev 00 B 1 Configuring LLC Services Online Help for show Commands To display a list of command options enter show Ilc2 at any BCC prompt To learn more about any show llc2 command option and its syntax use the question mark command as follows Example bcc show llc2 all dlci fr svc interfaces links summary bcc show llc2 interfaces show llc2 interfaces enabled arg interface lt arg gt bcc show llc2 interfaces interface S21 show llc2 interfaces interface S21 Oct 12 2001 04 26 51 EDT LLC2 Interfaces Max Receive Transmit Name State Links Window Window Encapsulation S21 down 255 7 7 fr B 2 308635 15 1 Rev 00 show Ilc2 all Monitoring LLC Using the BCC show Commands The show llc2 all command shows all the information that you can display using the other show llc2 commands The output includes the following information LLC2 Interfaces Name Circuit name assigned to the interface State State of the LLC service up down init initializing disabled or absent Max Links Maximum number of end to end connectio
52. arameters e DLSw RFC Version SR Internal LAN ID e DLSw Virtual Ring ID hex e DLSw Peer IP Address dual switch networks only Click on Help or see Configuring DLSw Services for parameter descriptions continued 308635 15 1 Rev 00 Starting LLC Services Site Manager Procedure continued You do this System responds 8 Click on OK The DLSw Basic Interface Parameters window opens 9 Set the following parameters SR Interface Ring ID e DLSw Slot IP Address Click on Help or see Configuring DLSw Services for parameter descriptions 10 Click on OK You return to the Configuration Manager window Starting DLSw and LLC2 over Frame Relay BNN Because the BNN format does not carry the destination MAC address incoming LAN frames are delivered to the host in one of two ways e Using permanent virtual circuits PVCs e Using switched virtual circuits SVCs Starting DLSw and LLC2 on a Frame Relay BNN PVC Interface If you use PVCs to connect two devices over the network the router retrieves the destination MAC address from a frame relay mapping table The table has these fields e DLCI Represents a frame relay PVC e Remote MAC Represents the destination MAC address Local MAC Represents a source MAC address Each physical frame relay interface has one frame relay PVC mapping table Each table entry must have a value specified for the local MAC address the remote MAC
53. configured on the default service record the circuit name is displayed MAC Address Address of the local or remote end station to be mapped to this SVC Mapping Type Specifies whether this is a remote or local mapping Plan Specifies whether this SVC uses the E 164 or X 121 X121 Address number plan for address WAN address registered with frame relay to accept an incoming call if the mapping is local or to establish an SVC to the configured number if the mapping is remote Sub Address Outbound or inbound calling or called party subaddress Type of Number Specifies the type of number that the remote or local caller uses international or unknown 308635 15 1 Rev 00 Monitoring LLC Using the BCC show Commands show llc2 dici The show llc2 dici command displays information about the DLCIs configured for LLC2 on frame relay interfaces This command allows for the following command filters flags and arguments dici d ci number Displays information for the specified DLCI only interface circuit name Displays information for the specified frame relay service record or interface only The output includes the following information Name Name of the frame relay service record on which the DLCI is configured If the DLCI is configured on the default service record the circuit name is displayed Dici Num Configured DLCI number to which you are mapping the l
54. d Reenabling an LLC2 Interface The following sections describe how to disable and enable LLC2 on an interface using the BCC or Site Manager Using the BCC To disable or reenable LLC2 on an interface navigate to the LLC2 interface prompt for example box ethernet 2 1 Ilc2 and enter the following command disable enable For example the following command sequence disables LLC2 on an Ethernet interface ethernet 2 1 llc2 1llc2 ethernet 2 1 disable llc2 ethernet 2 1 Using Site Manager To disable or reenable LLC2 on a router interface complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose LLC2 The LLC2 menu opens 3 Choose Interfaces The LLC2 Interface Configuration window opens Select the interface that you want to disable or enable Set the Enable parameter Click on Help or see the parameter description on page A 11 6 Click on Apply 7 Click on Done You return to the Configuration Manager window 308635 15 1 Rev 00 4 3 Configuring LLC Services Configuring the Window Size In LLC a window controls how many frames a link station sends before receiving an acknowledgment The window size depends on which modulo your network s implementation of LLC uses Modulo 8 operation allows a maximum window size of 7
55. destination MAC address to a single SVC configured on this interface navigate to the LLC2 interface prompt for example box serial 3 1 frame relay service service1 llc2 and enter fr sap translation enabled disabled For example the following command enables translation of multiple source MAC addresses and SAPs to a virtual SAP 11c2 service1 fr sap translation enabled llc2 servicel Using Site Manager To enable or disable translation of multiple source MAC addresses and SAPs to a virtual SAP complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose LLC2 The LLC2 menu opens 3 Choose Interfaces The LLC2 Interface Configuration window opens 4 Click on the interface that you want to customize 5 Set the FR Sap Translation parameter Click on Help or see the parameter description on page A 19 6 Click on Apply 7 Click on Done You return to the Configuration Manager window 308635 15 1 Rev 00 4 15 Configuring LLC Services Editing Frame Relay PVC Mappings After you create a DLCI for the frame relay BNN PVC implementation you can change the remote and local addresses associated with the DLCI However you cannot change the DLCI number itself you must delete the existing DLCI and create a new one For instructions on creating a DLCI for
56. dy RR Receiver not ready RNR Receiver not ready RNR Reject REJ Reject REJ Set asynchronous balanced mode extended SABME Unnumbered acknowledgment UA Disconnect DISC Disconnected mode DM No command Frame reject FRMR 308635 15 1 Rev 00 Logical Link Control Overview Type 1 operations do not include definition of an acknowledgment PDU Type 2 operations do not include a command PDU counterpart for the FRMR response PDU LLC Protocol Data Unit Formats The LLC PDU contains fields for addressing control and data as shown in Figure 1 3 This section describes each field of the LLC PDU DSAP SSAP Control Information field 8 bits 8 bits 8 or 16 bits Variable 8 bits each packet Figure 1 3 LLC PDU Structure Destination SAP DSAP The DSAP address field identifies one or more service access points SAPs for which the LLC PDU is intended The DSAP field contains 7 bits of actual address and 1 address designation bit to indicate an individual I destination address or a group G destination address as shown in Figure 1 4 Address designation bit DDDDDDD VG LLCO0003A Figure 1 4 DSAP Address Field A value of 0 for the address designation bit indicates that the PDU is destined for an individual SAP A value of 1 for the address designation bit indicates that the PDU is destined for a group level SAP 308635 15 1 Rev
57. e to the box or stack prompt 2 Configure DLSw global attributes box disw dlsw 308635 15 1 Rev 00 3 17 Configuring LLC Services 10 11 Specify a slot for the IP interface and the IP address to use for TCP connections based on this slot For example to configure slot 3 with an IP address of 1 1 1 3 enter dlswit slot ip 3 ip addr 1 1 1 3 slot ip 3 Return to the box or stack prompt slot ip 3 box box Specify a serial interface on which you want to configure frame relay LLC2 and DLSw box Serial 3 1 serial 3 1 Configure frame relay on the serial interface serial 3 1 frame relay frame relay 3 1 Configure a service name for the frame relay interface frame relay 3 1 service service1 service servicel Configure an SVC on the frame relay service service servicelst SVC Options svc name svc1 Svc options svcli Add LLC to the frame relay service svc options svc1 llc2 llc2 servicelds Configure the local or remote MAC address of the end station to be mapped to the SVC 1lc2 servicel fr svc 111111111111 fr svc 11111111111148 Configure the WAN address that will accept an incoming call if the mapping is local or initiate the call if the mapping is remote For example to configure a phone number that will map to the SVC enter the following command fr svc 1111111111114 X121 addr 9195551212 fr svc 1111111111114 3 18 308635 15 1 Rev 00 Starting LLC Services
58. ecifies the type of number that the remote or local caller uses You can enter international the default value or unknown x121 addr x121 adar x121 adar specifies a WAN address that is registered with frame relay to accept an incoming call if the mapping is local or to establish an SVC to the configured number if the mapping is remote For example the following command sequence changes the mapping type from local to remote and configures a number used to initiate the call and establish an SVC with the remote MAC address fr svc 1234567890124 mapping type remote fr svc 1234567890124 x121 addr 9785551212 fr svc 123456789012 4 18 308635 15 1 Rev 00 Using Site Manager Customizing LLC Services To edit and delete frame relay SVC mappings complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose LLC2 The LLC2 menu opens Choose Frame Relay SVC Mapping The LLC2 Frame Relay SVC Mappings window opens Click on the SVC for the MAC address that you want to edit Set one or more of the following parameters Mapping Type e X121 Addr Sub Addr e Numbering Plan Type of Number Click on Help or see the parameter descriptions beginning on page A 4 Click on Apply Click on Done You return to the Configuration Manager window
59. ect Disable to force every LLC2 interface existing on this node into the inoperative down state Select Enable only when an existing LLC2 interface is in the Disabled state 1 3 6 1 4 1 18 3 5 1 6 1 2 LLC2 Interface Parameters The LLC2 Interface Configuration window Figure A 6 lets you customize LLC2 interface parameters for specific clients such as DLSw and LAN Network Manager These and other LLC2 clients can be configured on the same physical circuits and therefore share the same LLC interfaces In such cases you can determine a compromise profile of LLC2 parameter settings that satisfy the combined recommendations of the LLC2 clients Note The Edit LLC2 Interface window has the same parameters as the LLC Interface Configuration window The Edit LLC2 Interface window shows only the circuit that you highlighted in the Circuit Definition window Refer to Configuring and Managing Routers with Site Manager for information about editing circuits A 10 308635 15 1 Rev 00 Site Manager Parameters EI LLC2 Interface Configuration E41 11c2 j Hons E42 11c2 Delete 51 11c2 S52 11c2 Apply Values Help Lo NNNM 7 Enable ENABLE Max Octets in UI 5128 Max Octets in I 5128 Receive Window 7 Send Window 7 Max Retry After TimeOut 10 Figure A 6 LLC2 Interface Configuration Window Parameter Enable Path Configuration Manager gt Protocols gt LLC2 gt Interfaces Default Enable Options
60. elay interface receives connection requests Usually only local workstation nodes will request a connection so you configure only the remote MAC address Router Mapping Examples Some sample network configurations with associated mapping tables follow including e Virtual MAC to frame relay e Frame relay to virtual MAC e Physical MAC to frame relay e Frame relay to physical MAC Frame relay to frame relay Although these network configurations illustrate topologies with two routers the same principles apply to DLSw operating in single switch mode Instead of configuring a single interface on each router you configure two interfaces on a single router 308635 15 1 Rev 00 2 5 Configuring LLC Services Virtual MAC Address to Frame Relay DLCI Figure 2 2 illustrates a sample virtual MAC address to frame relay DLCI mapping In this network the PC makes connection requests to hosts 1 and 2 The workstation administrator has control over the PC configuration and has configured the remote host addresses as virtual MAC addresses corresponding to the DLCIS assigned to the hosts Configuring the PC in this way simplifies the router configuration because a mapping table is not necessary in the frame relay attached router B The connection request received at router A will have a source MAC address equal to the PC MAC address and a destination MAC address equal to remote host 1 or 2 Configuration at PC Remote host 1 400000FF00
61. ems with SNA and NetBIOS sessions Data link switching DLSw and Advanced Peer to Peer Networking APPN resolve these problems by locally terminating the LLC2 session at the router and by providing a local acknowledgment to SNA NetBIOS workstations The LLC2 subsystem provides these services The Nortel Networks implementation of the LLC protocol consists of LLC Class 1 LLC1 a connectionless service and LLC Class 2 LLC2 a connection oriented service The subsystems that require LLC2 services are as follows e DLSw e APPN LAN Network Manager LNM Most other protocols use LLC1 or connectionless delivery services 308635 15 1 Rev 00 1 1 Configuring LLC Services In general there is no need to change the LLC2 default settings You can however tune the network by changing these default settings In Site Manager you should not add LLC2 to an interface without also adding the DLSw APPN or LNM protocol Using LLC2 with SNA and NetBIOS SNA requires a connection oriented data link layer for end to end packet sequencing and error control Over wide area networks WANs the Synchronous Data Link Control SDLC protocol has traditionally met this need However in a LAN environment front end processors FEPs controllers and NetBIOS client server stations commonly use an LLC2 layer for this purpose To support communication among these devices you can add LLC2 interfaces to a router configuration SNA devices and
62. ent of any taxes including personal property taxes resulting from Customer s use of the Software Customer agrees to comply with all applicable laws including all applicable export and import laws and regulations Neither party may bring an action regardless of form more than two years after the cause of the action arose The terms and conditions of this License Agreement form the complete and exclusive agreement between Customer and Nortel Networks This License Agreement is governed by the laws of the country in which Customer acquires the Software If the Software is acquired in the United States then this License Agreement is governed by the laws of the state of New York 308635 15 1 Rev 00 Contents Preface Berre WBE an erty emer neon C D DIE xiii page Mr eR E Oo a ae asad xiv PODES EEEE E nema AEE E eo a re Eee XV Hard CGopy Technical NINA e TR xvii For Pcr HI e bts deca a a tua ee aeaiiai xvii Chapter 1 Logical Link Control Overview Using LLE2 with SNA and NetBIOS cates ces pa de EPpIS DNE REM ERES tana DUAE REF PAX ERE FEX IRE RUP AERE 1 2 m espccES au s e T 1 2 rae RER eitis o LEER RETE UE TT 1 3 Boundary cu cen dlc qe 1 5 P SD ausu denen duit c dar etos PROV pd On ben dS EH RR eR SEE t edd 1 5 DuC SUAS EOL auc deep aep ten a prb beet bo bt Ep OE On ams 1 5 Boundaty Access N dE A 1 6 Bde e nee e E a teen E E E EAEE TT 1 6 LEC Sarmice CREOS ncm 1 7
63. er gt Protocols gt LLC2 gt Interfaces 10 retransmissions 1 to 10 Specifies the maximum number of times that a PDU can be sent following expiration of the acknowledgment timer the inactivity timer or the reject timer Enter a valid value from 1 through 10 retransmissions Choose a value that is appropriate for the applications that LLC2 supports 1 3 6 1 4 1 18 3 5 1 6 2 1 11 308635 15 1 Rev 00 Site Manager Parameters Parameter Ack Timer for Xmt Path Configuration Manager gt Protocols gt LLC2 gt Interfaces Default 1 s Options 1 to 15 Function Specifies the amount of time in seconds that the local LLC waits to receive An acknowledgment for one or more outstanding I PDUs sent during the timer window A response PDU for an unnumbered command PDU sent during the timer window e A response PDU with the F bit set Instructions Enter a valid value from 1 through 15 The default value 1 second works in most environments but may be too small if the LLC connection is over frame relay a source route network with multiple hops or if the end station responds slowly to I frames Choose a value that is appropriate for the applications that LLC2 supports If you increase the value of the Ack Timer for Xmt parameter then you should consider decreasing the value of the Inactivity Timer parameter MIB Object ID 1 3 6 1 4 1 18 3 5 1 6 2 1 13 308635 15 1 Rev 00 A 15 Configuring LLC Services Parameter Path
64. ere you acquired the Software You obtain no rights other than those granted to you under this License Agreement You are responsible for the selection of the Software and for the installation of use of and results obtained from the Software 1 Licensed Use of Software Nortel Networks grants Customer a nonexclusive license to use a copy of the Software on only one machine at any one time or to the extent of the activation or authorized usage level whichever is applicable To the extent Software is furnished for use with designated hardware or Customer furnished equipment CFE Customer is granted a nonexclusive license to use Software only on such hardware or CFE as applicable Software contains trade secrets and Customer agrees to treat Software as confidential information using the same care and discretion Customer uses with its own similar information that it does not wish to disclose publish or disseminate Customer will ensure that anyone who uses the Software does so only in compliance with the terms of this Agreement Customer shall not a use copy modify transfer or distribute the Software except as expressly authorized b reverse assemble reverse compile reverse engineer or otherwise translate the Software c create derivative works or modifications unless expressly authorized or d sublicense rent or lease the Software Licensors of intellectual property to Nortel Networks are beneficiaries of this provision Upon termination or
65. erfaces ssse 4 12 308635 15 1 Rev 00 xi Preface This guide describes Logical Link Control LLC services and what you do to start and customize LLC services on a Nortel Networks router By customizing your router for LLC services you open your network to LAN Network Manager LNM servers data link switching DLSw services and Advanced Peer to Peer Networking APPN You can use the Bay Command Console BCC or Site Manager to configure LLC on a router In this guide you will find instructions for using both the BCC and Site Manager Before You Begin Before using this guide you must complete the following procedures For a new router e Install the router see the installation guide that came with your router e Connect the router to the network and create a pilot configuration file see Quick Starting Routers Configuring Remote Access for AN and Passport ARN Routers or Connecting ASN Routers to a Network Make sure that you are running the latest version of Nortel Networks BayRS and Site Manager software For information about upgrading BayRS and Site Manager see the upgrading guide for your version of BayRS 308635 15 1 Rev 00 xiii Configuring LLC Services Text Conventions This guide uses the following text conventions angle brackets lt gt bold text braces italic text screen text Indicate that you choose the text to enter based on the description in
66. es or a token ring interface and a frame relay BAN interface on a DLSw single switch the traffic between the two interfaces uses SRB not DLSw Using the BCC To configure DLSw and LLC2 on a frame relay BAN interface you first configure SRB and DLSw global attributes Then you configure frame relay SRB LLC2 and DLSw on that interface For example to configure DLSw and LLC2 on a frame relay BAN interface over a serial line with default settings 1 In configuration mode navigate to the box or stacks prompt 2 Configure DLSw global attributes box disw dlsw 3 Specify a slot for the IP interface and the IP address to use for TCP connections based on this slot 3 10 308635 15 1 Rev 00 Starting LLC Services For example to configure slot 3 with an IP address of 1 1 1 3 enter dlswit slot ip 3 ip addr 1 1 1 3 slot ip 3 Return to the box or stack prompt slot ip 3 box box If source route bridging is not yet configured on the router you must configure it globally before you can add DLSw and LLC2 to a frame relay BAN interface For example the following command enables source routing services on the router with a bridge ID value of 0x10 and a LAN ID value of 0x100 box Srb bridge id 0x10 internal lan id 0x100 srb Note For complete information about how to configure source route bridging see Configuring Bridging Services 10 Return to the box or stack prompt srb box box
67. ete frame relay mappings that you previously configured A 8 308635 15 1 Rev 00 Site Manager Parameters S41 DLCI 7 Es Delete Apply Values Help pu rj Remote MAC 0x123456789012 Local MAC 0x111111111111 Figure A 4 LLC2 Frame Relay PVC Mappings Window LLC2 Global Parameters The Edit LLC2 Global Parameters window LLC2 on the router A 5 lets you enable or disable Edit LLC2 Global Parameters Cancel Enable Figure A 5 Edit LLC2 Global Parameters Window 308635 15 1 Rev 00 A 9 Configuring LLC Services Parameter Path Default Options Instructions MIB Object ID Function Enable Configuration Manager gt Protocols gt LLC2 gt Global Enable Enable Disable Globally enables or disables the system software mechanisms that in turn allow or do not allow users to add an LLC2 interface to a physical circuit You can configure only one LLC2 interface per physical circuit Other significant actions that the system software performs when you choose a setting for the LLC Enable parameter include Disable Forces every LLC2 interface on this node into the inoperative down state Enable Reinitializes every LLC2 interface on this node with each interface maintaining the most recent setting of its own interface Enable parameter The actual operating state of each interface further depends on the current up down state of the associated physical circuit Sel
68. figuration similar to a standalone Frame Relay Access Device FRAD Compatibility with IBM NCP 7 1 and Later LLC2 routed over a frame relay BNN network is fully compatible with IBM NCP 7 1 and later and with existing or new IBM equipment The service has passed IBM interoperability testing You can use it without upgrading your LAN based downstream physical units DSPUs or network type such as APPN or IP DSPUs attached to the router retain full visibility for IBM NetView management The router passes through all NetView commands for the DSPUs and any alerts generated by the DSPUs You can configure a network without a router at the host if the communications controller is directly attached to a frame relay network Some terminals can also connect directly to the frame relay network without a router Frame relay networks eliminate the expense of leased lines Additional savings accrue because one port on a communications controller can support hundreds of data link connection identifiers DLCIs Nortel Networks interoperates with NCP 7 1 and later with software only eliminating the need for any new hardware or upgrades to existing SNA terminals or router equipment Figure 2 1 illustrates the connection of an SNA host through a frame relay network in a configuration with multiprotocol traffic to other locations In addition to APPN token ring and IP traffic LLC can also route SDLC and Ethernet traffic 2 2 308635 15 1 Rev 0
69. formation and Information PDU Sizes 4 6 COBROLDUDSOI TWN acids orsa dumque iae Doeiue decane Ida Ka ta Gi exp not cleus eiue UU cop 4 7 Specifying the Maximum Number of PDU Retries After Timeout 4 9 Setting the Maximum Number of LLC2 Interface Connections 4 10 Fine Tuning LLO2 Interface Parameters eicere tttm rendum eee n 4 12 Customizing LLC2 over Frame Relay 4 13 Configuring the Frame Relay Virtual MAC Address Mask sss 4 13 Enabling Frame Relay MAC Address Translation to a Virtual SAP 4 14 Editing Frame Relay PVG Mappings pax p ne eh re eR en DA ROREM aloes 4 16 Editing Frame Relay SVC Mappings esessseeeseseeeeeeeenneen nnne 4 17 Configuring the LLC Virtual Ring Number for APPN with SRB 4 20 Configuring LEGS Inbound Traffic FIEBES 12a epe tace repere Er RR ERE pee neci 4 21 Deleting LEGS from an Interface sigirini naanakan hi 4 21 Deleting LLC2 from ihe OWEN iui o rd ce inn Rei obe UR Ead Hadr te dia le ela 4 22 Appendix A Site Manager Parameters rec c M LLC PARAM rl e A 2 Add LLC2 Frame Relay SVC Mapping Parameters ssessseeeeeeneee A 2 LLC2 Frame Relay SVC Mapping Parameters sessssssseeseeeeeeennneenn A 5 Add LLC2 Frame Relay PVC Mapping Parameters 1
70. guration Manager menu path Default setting Valid parameter options Parameter function Instructions for setting the parameter Management information base MIB object ID 308635 15 1 Rev 00 Configuring LLC Services The Technician Interface allows you to modify parameters by issuing set and commit commands with the MIB object ID This process is equivalent to modifying parameters using Site Manager For more information about using the Technician Interface to access the MIB see Using Technician Interface Software E Caution The Technician Interface does not verify that the value you enter for a parameter is valid Entering an invalid value can corrupt your configuration Accessing LLC Parameters After you enable LLC services on one or more interfaces you can access and edit LLC parameters To display LLC parameter windows begin at the Configuration Manager window and select Protocols LLC2 The LLC2 menu opens You can access and edit the parameters for a specific LLC2 interface by clicking on the circuit and choosing Edit Circuit from the Edit Connector window If you are editing a frame relay interface click on Services Then open the Protocols menu and choose Edit LLC2 to display the LLC2 menu Add LLC2 Frame Relay SVC Mapping Parameters The LLC2 Frame Relay SVC Mapping Add window Figure A 1 contains the following parameters MAC Address address of the end station to be mapped e Mapping Type specifies
71. hernet interface with default values 1 In configuration mode navigate to the box or stacks prompt 2 Configure an Ethernet interface For example enter box amp ethernet slot 2 connector 1 ethernet 2 1 3 Add LLC2 to the interface ethernet 2 1 llc2 1llc2 ethernet 2 1 4 Display the default settings for LLC2 interface parameters 11c2 ethernet 2 14 info ack xmt timer 1 busy timer 60 dup addr check disabled dynamic window enabled encapsulation default fr virtual mask lt not_set gt high water reset normal idle timer 120 local response acktimer 10 max info size 5128 max links 255 max retries 2 max saps 255 max ui size 5128 n2 10 n3 1 poll cycle timer 30 8 4 308635 15 1 Rev 00 Starting LLC Services receive window 7 reject timer 1 srb ring id 0x0 state enabled transmit window 7 ui ackwait timer 30 llc2 ethernet 2 1 Configuring LLC2 on a Token Ring Interface To configure LLC2 on a token ring interface with default values 1 2 In configuration mode navigate to the box or stack prompt If source route bridging is not yet configured on the router you must configure it globally before you can add LLC2 to a token ring interface For example the following command enables source routing services on the router with a bridge ID value of 0x10 and a LAN ID value of 0x100 box Srb bridge id 0x10 internal lan id 0x100 srb Note For complete information about how to configure
72. igns DLCIs To communicate with an IBM host you must associate the MAC address of your DSPU with a DLCI You can accomplish this task in one of two ways e Create a virtual MAC address formed by preceding the DLCI address such as 100 decimal with a unique mask such as 0x400000FF to make a valid MAC address for example 400000FF0064 Decimal 100 is 64 hexadecimal When the router receives an LLC frame from the DLSw network with a destination MAC dmac starting with the virtual MAC mask it can automatically translate it into a DLCI so no mapping table is needed at the frame relay interface 2 4 308635 15 1 Rev 00 LLC2 Routed over Frame Relay e Use the end station s physical or locally configured MAC address In this case be aware that if you change your hardware or end station configuration you must reconfigure the DLCI mapping table When the router receives an LLC frame from the DLSw network with a dmac that does not start with the virtual MAC mask the mapping table at the frame relay interface translates the dmac into a DLCI SDLC single switched over LLC does not require address mapping if a virtual MAC address is used to access the host But you still must define DLCIs In general you configure only the remote MAC address in the mapping table setting it equal to the remote host MAC address A host may be an IBM mainframe You must configure the local MAC address in the mapping table only if the frame r
73. ions describe how to remove LLC2 from a router entirely using the BCC or Site Manager Using the BCC To delete LLC2 services from the router entirely navigate to the LLC2 global prompt and enter delete For example the following command removes LLC2 from the router 11c2 delete box 4 22 308635 15 1 Rev 00 Using Site Manager To delete LLC2 from a router entirely Customizing LLC Services Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens 2 Choose LLC2 The LLC2 menu opens Choose Delete LLC2 A confirmation window opens 4 Click on OK You return to the Configuration Manager window 308635 15 1 Rev 00 4 23 Appendix A Site Manager Parameters This appendix contains the Site Manager parameter descriptions for LLC services You can display the same information using Site Manager online Help This appendix contains the following information Topic Page Accessing LLC Parameters A 2 Add LLC2 Frame Relay SVC Mapping Parameters A 2 LLC2 Frame Relay SVC Mapping Parameters A 5 Add LLC2 Frame Relay PVC Mapping Parameters A 6 LLC2 Frame Relay PVC Mapping Parameters A 8 LLC2 Global Parameters A 9 LLC2 Interface Parameters A 10 For each parameter this appendix provides the following information Parameter name Confi
74. it 5 Set one or both of the following parameters Remote MAC e Local MAC Click on Help or see the parameter descriptions beginning on page A 8 6 Click on Apply and then click on Done You return to the Configuration Manager window Editing Frame Relay SVC Mappings After you create an SVC for the frame relay BNN SVC implementation you can change the parameters associated with the SVC However you cannot change the MAC address associated with the SVC you must delete the SVC and create a new one for the new MAC address For instructions on creating an SVC for use with frame relay BNN SVC see Starting DLSw and LLC2 on a Frame Relay BNN SVC Interface on page 3 17 308635 15 1 Rev 00 4 17 Configuring LLC Services Using the BCC To edit frame relay SVC mappings for LLC2 navigate to the LLC2 SVC prompt for example box serial 3 1 frame relay service service1 llc2 fr svc 111111111111 and set one or more of the following parameters mapping type local remote Specifies whether this is a remote or local mapping The default value is local sub addr sub addr sub addr specifies the outbound calling or called party subaddress which is also the inbound calling or called party subaddress svc plan e164 x121 Specifies whether this SVC uses the E 164 or X 121 number plan for addresses You can enter e164 or x121 the default value type of number international unknown Sp
75. it and negotiates downward Choose a value that is appropriate for the applications that LLC2 supports MIB Object ID 1 3 6 1 4 1 18 3 5 1 6 2 1 22 308635 15 1 Rev 00 A 13 Configuring LLC Services Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Send Window Configuration Manager gt Protocols gt LLC2 gt Interfaces 7 PDUs 1 to 127 Specifies the maximum number of information PDUs that can be outstanding sent or transmitted at any given time This value serves as a default send window size when no other size has been set by an XID information exchange procedure Enter any valid value from 1 through 127 LLC PDUs For sessions that do not negotiate XIDs SNA PU 2 0 and NetBIOS set the router send window to the minimum end station s receive window If the send window is too large end stations discard frames that they receive outside their receive window Timers recover these frames and dropping these frames degrades performance For sessions that negotiate XIDs SNA PU 2 1 the send window is set dynamically during connection establishment The router uses the value specified here as an upper limit and negotiates downward Choose a value that is appropriate for the requirements of the applications that LLC2 supports 1 3 6 1 4 1 18 3 5 1 6 2 1 23 Max Retry After TimeOut Configuration Manag
76. known International Function Specifies the type of number that the remote or local caller uses Instructions To allow the caller to use an international type accept the default International MIB Object ID Otherwise choose Unknown 1 3 6 1 4 1 18 3 5 1 6 10 1 8 LLC2 Frame Relay SVC Mapping Parameters The LLC2 Frame Relay SVC Mappings window Figure A 2 allows you to edit and delete frame relay SVC mappings that you previously configured 308635 15 1 Rev 00 A 5 Configuring LLC Services Mapping Type LOCAL X121 Addr Sub Addr Numbering Plan Type of Number INTERNATIONAL Figure A 2 LLC2 Frame Relay SVC Mappings Window Add LLC2 Frame Relay PVC Mapping Parameters The LLC2 Frame Relay PVC Mapping Add window Figure A 3 contains the following parameters e DLCI number of the virtual circuit to which you map the local or remote MAC address e Remote MAC address that maps outgoing requests to the DLCI value e Local MAC address that maps incoming requests on this DLCI to this address A 6 308635 15 1 Rev 00 Site Manager Parameters LLC2 Frame Relay Mapping Add Cancel OK Values Help DLCI 101 Remote MAC 400000F F0064 Local MAC 4000000000038 Figure A 3 LLC2 Frame Relay PVC Mapping Add Window Parameter DLCI Path Configuration Manager gt Edit Circuit gt Services gt Protocols gt Edit LLC2 gt Frame Relay PVC Mapping gt Add Default None Options Standa
77. lanced mode or the destination LLC The connection operates in asynchronous extended SABME 6F balanced mode If the destination LLC receives from its network layer a data link connect request the destination LLC responds to the SABME PDU with a UA PDU If the destination LLC receives from its network layer a data link disconnect request it does not send a UA PDU continued 308635 15 1 Rev 00 Logical Link Control Overview Table 1 4 Command and Response PDU Names and Definitions continued Command Conirol Field Response PDU Value Definition Disconnect DISC 53 The DISC response PDU closes an open connection by initiating a or SABME command The DISC PDU informs the destination LLC 43 that the source LLC is suspending the data link connection and the destination LLC should assume the disconnected mode Prior to acting on the DISC command the destination LLC must confirm the acceptance of the DISC command PDU by sending a UA response PDU PDUs sent previously but not acknowledged remain unacknowledged Unnumbered 73 The UA response PDU acknowledges the receipt and acceptance acknowledgment or of a SABME or DISC command PDU relating to a specific data link UA 63 connection to be opened or closed as appropriate for the type of command PDU it received Disconnected mode 1F The DM response PDU indicates that the LLC sending the DM or response is logically disconnected from the data link connectio
78. lect Protocols window choose The DLSw Basic Global Parameters DLSw When you choose DLSw LLC2 is window opens selected automatically 9 Setthe following parameters e DLSw RFC Version e DLSw Virtual Ring ID hex DLSw Peer IP Address dual switch networks only Click on Help or see Configuring DLSw Services for parameter descriptions 10 Click on OK The DLSw Basic Interface Parameters window opens 11 Set the DLSw Slot IP Address parameter Click on Help or see Configuring DLSw Services for parameter descriptions 12 Click on OK You return to the ATM Service Records List window 13 Click on Done until you return to the 308635 15 1 Rev 00 Configuring LLC Services Starting DLSw and LLC2 over Frame Relay For the configuration of DLSw over frame relay IBM provides two types of frame relay support e Boundary Access Node BAN bridged format e Boundary Network Node BNN RFC 1490 or Routed SNA When you configure a frame relay interface for DLSw using Site Manager a message prompts you to select BAN PVC BNN PVC or BNN SVC Starting DLSw and LLC2 over Frame Relay BAN BAN frames use a standard RFC 1490 Bridged 802 5 over frame relay format Because this frame is source routed you must enable SRB on a frame relay BAN interface The following sections describe how to configure DLSw and LLC2 over frame relay BAN using the BCC or Site Manager Note If you configure two token ring interfac
79. meters e DLSw RFC Version e DLSw Virtual Ring ID hex e DLSw Peer IP Address dual switch networks only Click on Help or see Configuring DLSw Services for parameter descriptions 8 Click on OK The DLSw Basic Interface Parameters window opens 9 Set the DLSw Slot IP Address parameter Click on Help or see Configuring DLSw Services for parameter descriptions 10 Click on OK The LLC2 Frame Relay SVC Mappings window opens 11 Click on Add The LLC2 Frame Relay SVC Mapping Add window opens 12 Set the following parameters MAC Address Mapping Type X121 Addr Sub Addr Numbering Plan Type of Number Click on Help or see the parameter descriptions beginning on page A 2 13 Click on OK You return to the LLC2 Frame Relay SVC Mappings window 14 Click on Done You return to the Configuration Manager window 3 20 308635 15 1 Rev 00 Starting LLC Services Starting APPN and LLC2 over Frame Relay To start APPN and LLC2 over frame relay complete the following steps Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Add Circuit window opens click on the synchronous connector on which you are enabling APPN 2 Click on OK to accept the default circuit The WAN Protocols window opens name 3 Choose Frame Relay and click on OK The Select Protocols window opens 4 Choose APPN When you choose APPN y
80. mids sped Plndupdidet dese scudo sa pA eau bab Rub nian 3 2 LLC2 Connguration Hierarchy ee EE 3 2 Staring LLCZ on a LAN IMETA CE as e ae d open o virer er ER RR DA PUE Lr URL 3 4 Configuring LLC2 on an Ethernet Interface sseseseeseeeeeeeee 3 4 Configuring LLC2 on a Token Ring Interface eoe nte theta 3 5 Configuring LLC2 on an FDDI Interface eaaet ermita 3 6 Sisnng LLO oval ATM LANE siririn einari R a 3 8 Starting DLSw and LLC2 over Frame Relay sis contin x i ER exe RE denis 3 10 Starting DLSw and LLC2 over Frame Relay BAN sss 3 10 Starting DLSw and LLC2 over Frame Relay BNN eese 3 13 Starting DLSw and LLC2 on a Frame Relay BNN PVC Interface 3 13 Starting DLSw and LLC2 on a Frame Relay BNN SVC Interface 3 17 Starting APPN and LLC over Frame Relay uci cats cise iii 3 21 vi 308635 15 1 Rev 00 Chapter 4 Customizing LLC Services Disabling and Reenabling LLC2 on the Router cccceceeceseeeeeeeeeeeseneeeeeneeeeeneeeteeeeeae 4 1 Customizing am LECZ GAC c reet robur pbi anni duran ene 4 2 Disabling and Reenabling an LLC2 Interface sssssseeeneeeeee 4 3 Contguring th Window IS oireann cies eet a AE EAR Ea AEEA RS 4 4 Specifying the Maximum Number of Received Information PDUs 4 4 Specifying the Maximum Number of Outstanding Information PDUs 4 5 Specifying the Unnumbered In
81. n OF Frame reject 97 The FRMR command PDU reports to the sending LLC that an FRMR or uncorrectable condition was detected in a received frame The 87 FRMR PDU includes an information field that indicates the reason for the PDU rejection The LLC receiving the FRMR PDU responds as follows Initiates the appropriate mode setting e Initiates corrective action by reinitializing transmission in both directions on the data link connection using the SABME and DISC command PDUs as appropriate 308635 15 1 Rev 00 Configuring LLC Services Information Field The contents of the information field depend on the type of PDU it appears in as follows The information field of an I format PDU contains only user data The information field of a UI command response PDU also contains only user data The information field of a TEST command response PDU is optional and contains a test pattern used for LLC loopback testing The information field of an XID command response PDU contains An 8 bit XID format identifier field A 16 bit parameter field encoded to identify the LLC services supported plus the maximum receive window size The information field of an FRMR PDU contains the reason for PDU rejection by an LLC For more details on the FRMR PDU refer to ISO 8802HEEE Std 802 2 1989 1 20 308635 15 1 Rev 00 Chapter 2 LLC2 Routed over Frame Relay LLC2 connection oriented service in a Nortel Networks
82. n and source MAC addresses in the network packets the BNN format carries the fewest number of bits per packet and yields low network overhead Therefore you must explicitly define a permanent virtual circuit PVC or a switched virtual circuit SVC to carry a packet to its destination PVC Support To configure PVCs for LLC2 you create the LLC2 frame relay mapping table The mapping table consists of three fields e DLCI frame relay PVC Remote MAC destination MAC address e Local MAC source MAC address For each entry in the table you must specify the remote MAC the local MAC or both A packet that matches this entry is then forwarded to the specified data link connection identifier DLCI SVC Support The use of a switched virtual circuit SVC is very similar to the BNN PVC over frame relay implementation However rather than requiring PVCs to always be available you use an SVC to connect only when there is data to transfer 308635 15 1 Rev 00 1 5 Configuring LLC Services The following features are supported with the BNN SVC implementation Providing a connection only after a client requests a session for example through sending a test poll e Disconnecting when an SVC is not in use e Mapping remote and local MAC addresses to E 164 or X 121 addresses Directing multiple client connection requests to a single destination MAC address over a single SVC by modifying the source local service access poi
83. nchronous balanced mode extended service access point Synchronous Data Link Control Systems Network Architecture source routing source route bridging xvi 308635 15 1 Rev 00 Preface SSAP source service access point SVC switched virtual circuit UA unnumbered acknowledgment UI unnumbered information WAN wide area network XID exchange identification Hard Copy Technical Manuals You can print selected technical manuals and release notes free directly from the Internet Go to the www nortelnetworks com documentation URL Find the product for which you need documentation Then locate the specific category and model or version for your hardware or software product Use Adobe Acrobat Reader to open the manuals and release notes search for the sections you need and print them on most standard printers Go to Adobe Systems at the www adobe com URL to download a free copy of the Adobe Acrobat Reader You can purchase selected documentation sets CDs and technical publications through the Internet at the www1 fatbrain com documentation nortel URL How to Get Help If you purchased a service contract for your Nortel Networks product from a distributor or authorized reseller contact the technical support staff for that distributor or reseller for assistance If you purchased a Nortel Networks service program contact one of the following Nortel Networks Technical Solutions Centers Technical Solutions Center Telephone 3
84. nds responses Supervisory function bit Modifier function bit Reserved and set to zero Poll final bit LLCO006A Figure 1 7 LLC PDU Control Field Format 308635 15 1 Rev 00 1 15 Configuring LLC Services Control Field Formats Table 1 2 further defines the purpose of the three PDU types where the specific format in the PDU control field determines the type Table 1 2 PDU Format and Function Format Function Information The format PDU performs a numbered information transfer in type transfer 2 operation Except for the UI TEST FRMR and XID command format I response PDUs the I format PDU is the only LLC PDU that can contain an information field See Information Field on page 1 20 for more details Supervisory The S format PDU performs data link supervisory control functions in format S type 2 operation such as acknowledging format PDUs requesting retransmission of format PDUs and requesting temporary suspension of format PDU transmission Unnumbered The U format PDU is available for type 1 or type 2 operations and format U provides additional data link control functions and unsequenced information transfer Table 1 3 further defines the purpose of parameter bits in the PDU control field Table 1 3 Control Field Bits and Functions Bit Function Send sequence number N S bit Only I PDUs contain N S which is the sequence number of the PDU being transmitted
85. nk layer connection LLC2 also performs the following services e Responds to a request from a higher level protocol to reset a connection to its initially connected state e Responds to a request from a higher level protocol to close an established connection e Notifies a higher level protocol that a connection previously established has been closed successfully Because the connection occurs in the data link layer rather than in higher layers LLC2 performs frame sequencing flow control and error recovery services for the data link layer 1 8 308635 15 1 Rev 00 Logical Link Control Overview LLC Operation Types LLC supports two operation types Unnumbered unacknowledged type 1 Numbered acknowledged type 2 LLCI supports only type 1 operations LLC2 supports both type 1 and type 2 operations Type 1 Operations Type 1 operations have the following characteristics LLCs exchange protocol data units PDUs without establishing a data link connection The peer does not acknowledge the PDUs it receives There are no mechanisms for PDU sequencing flow control or error recovery because higher level protocols perform these services Type 2 Operations Type 2 operations have the following characteristics The LLC and its peer must establish a data link layer virtual circuit connection prior to any exchange of data The source and destination are peer LLCs in an asynchronous balanced data link connecti
86. ns per Receive Window LLC service Maximum number of unacknowledged information PDUs that LLC can receive Transmit Window Maximum number of information PDUs that can be outstanding at any given time Encapsulation DLCI Mapping Table The encapsulation technique that should be used by LLC default fr token ring csmacd or source routing Name Name of the frame relay service record on which the DLCI is configured If the DLCI is configured on the default service record the circuit name is displayed Dici Num Configured DLCI number to which you are mapping the local or remote MAC address Local MAC MAC address of the local end station to be mapped to this DLCI Incoming requests on this DLCI will be mapped to the specified local MAC address Remote MAC MAC address of the remote end station to be mapped to this DLCI Outgoing requests specifying this MAC address will be mapped to the DLCI LLC2 Connections Table Circuit Name Circuit name assigned to the interface Dest MAC MAC address of the remote station Src MAC MAC address of the local station Dsap One or more destination SAPs for which the LLC PDU is intended Ssap Specific source SAP that initiated the PDU continued 308635 15 1 Rev 00 B 3 Configuring LLC Services LLC2 FR SVC Mapping Table Name Name of the frame relay service record on which the SVC is configured If the SVC is
87. nt SAP SAPs are created at the receiving side and source MAC addresses are automatically created Boundary Access Node The Boundary Access Node BAN is an IBM router enhancement BAN refers to the RFC 1490 specification for bridged SNA over frame relay The associated IBM NCP 7 3 enhancement is called the Boundary Node Identifier BNI Because BAN carries the destination and source MAC addresses in the network packets this format carries more bits per packet than BNN and requires less configuration Standard BAN uses the source route bridging frame format with local termination Nortel Networks routers select BAN when you configure the frame relay network with source route encapsulation LLC 8802 802 2 Standards The LLC protocols comply with the ITU T 8802 2 standard and operate within the IEEE Project 802 x protocol stack Figure 1 2 compares LLC s location in the 802 x protocol stack to its equivalent position in the ISO OSI model 1 6 308635 15 1 Rev 00 Logical Link Control Overview ISO OSI model Application ee 802 2 LLC Data link MAC Physical Physical LLC0002A Figure 1 2 LLC Sublayer in the IEEE 802 x and OSI Models You can add an IEEE 802 2 compliant LLC interface to any physical circuit attached directly to an 8802 x 802 x LAN segment Each interface services higher level clients networking protocols and applications and is serviced by lower level protocols MAC and physical layers
88. ocal LLC2 interface can allocate navigate to the LLC2 interface prompt for example box ethernet 2 1 Ilc2 and enter max links lt max_links gt max_links is the number of end to end connections from 4 through 5000 For example the following command changes the number of end to end connections to 1000 11c2 ethernet 2 148 max links 1000 llc2 ethernet 2 1 4 10 308635 15 1 Rev 00 Using Site Manager Customizing LLC Services To specify the maximum number of logically independent end to end connections that the local LLC2 interface can allocate complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The Protocols menu opens Choose LLC2 The LLC2 menu opens Choose Interfaces Click on the interface that you want to customize The LLC2 Interface Configuration window opens Set the Max Links parameter Click on Help or see the parameter description on page A 17 6 Click on Apply 7 Click on Done You return to the Configuration Manager window 308635 15 1 Rev 00 Configuring LLC Services Fine Tuning LLC2 Interface Parameters Using the BCC you can further fine tune the LLC2 configuration of an interface Table 4 1 describes these parameters In general you can accept the default values for these parameters Table 4 1 BCC Fine Tuning Paramete
89. ocal or remote MAC address Local MAC MAC address of the local end station to be mapped to this DLCI Incoming requests on this DLCI will be mapped to the specified local MAC address Remote MAC MAC address of the remote end station to be mapped to this DLCI Outgoing requests specifying this MAC address will be mapped to the DLCI 308635 15 1 Rev 00 B 5 Configuring LLC Services show llc2 fr svc The show Ilc2 fr svc command displays information about the SVCs configured for LLC2 on frame relay interfaces This command allows for the following command filters flags and arguments mac address mac address interface circuit name Displays information for the specified MAC address only Displays information for the specified frame relay service record or interface only The output includes the following information Name Name of the frame relay service record on which the SVC is configured If the SVC is configured on the default service record the circuit name is displayed MAC Address Address of the local or remote end station to be mapped to this SVC Mapping Type Specifies whether this is a remote or local mapping Plan Specifies whether this SVC uses the E 164 or X 121 number plan for address X121 Address WAN address registered with frame relay to accept an incoming call if the mapping is local or to establish an SVC to the configured number if the map
90. on The source and destination LLCs control traffic by means of a numbering scheme for the sequential transfer of PDUs The PDUs for each virtual circuit connection have independent sequence numbering schemes The destination LLC acknowledges data PDUs that the source LLC sends by informing the source LLC of the next sequence number expected 308635 15 1 Rev 00 Configuring LLC Services LLC Functionality The LLC protocols generate and interpret command packets or frames called protocol data units PDUs The LLC sublayer which can support multiple logical links concurrently uses the following types of PDUs e Initiates and terminates control signal interchange with XID TEST SABME and DISC PDUs e Organizes data flow with UI I and UA PDUs The level of organization differs between type 1 and type 2 operations e Interprets command PDUs that it receives and generates appropriate response PDUs which differ between type 1 and type 2 operations and between LLC1 and LLC2 service e Manages error control and recovery with the REJ RR RNR and FRMR PDUs Table 1 1 lists type 1 and type 2 command PDUs and their counterpart response PDUs Table 1 1 LLC Command PDUs Operation Type Command Response Type 1 Unnumbered information UI No response Exchange identification XID Exchange identification XID Test TEST Test TEST Type 2 Information I Information I Receiver ready RR Receiver rea
91. ou automatically choose LLC2 5 Click on OK A window opens asking whether you want to use source route encapsulation 6 Click on No to select native routed frame The APPN Local Node Name relay for LLC2 Configuration window opens 7 Setthe Local Node Name NETID NAME parameter Click on Help or see Configuring APPN Services for a parameter description 8 Click on OK The APPN FR Configuration window opens 9 Setthe following parameters e DLCI Address SAP hex Click on Help or see Configuring APPN Services for parameter descriptions 10 Click on OK You return to the Configuration Manager window 308635 15 1 Rev 00 3 21 Chapter 4 Customizing LLC Services When you start LLC on the router as described in Chapter 3 Starting LLC Services default values are in effect for all parameters Depending on the requirements of your network you may want to change some of these values This chapter includes the following information Topic Page Disabling and Reenabling LLC2 on the Router 4 1 Customizing an LLC2 Interface 4 2 Customizing LLC2 over Frame Relay 4 13 Configuring the LLC Virtual Ring Number for APPN with SRB 4 20 Configuring LLC2 Inbound Traffic Filters 4 21 Deleting LLC2 from an Interface 4 21 Deleting LLC2 from the Router 4 22 Disabling and Reenabling LLC2 on the Router When you configure LLC2 LLC2 is automatically enabled on the router If you disable LL
92. pens 4 Click on the interface that you want to customize 5 Setthe Receive Window parameter Click on Help or see the parameter description on page A 13 6 Click on Apply 7 Click on Done You return to the Configuration Manager window Specifying the Maximum Number of Outstanding Information PDUs The following sections describe how to specify the maximum number of information PDUs that can be outstanding at any given time using the BCC or Site Manager Using the BCC To specify the maximum number of information PDUs that can be outstanding sent at any given time navigate to the LLC2 interface prompt for example box ethernet 2 1 Ilc2 and enter transmit window lt PDUs gt PDUS is the maximum number of information PDUS that can be outstanding at any given time The value serves as a default send window size when no other size has been set by an XID information exchange procedure You can enter a value from 1 through 127 308635 15 1 Rev 00 4 5 Configuring LLC Services Using Site Manager For example the following command changes the maximum number of outstanding information PDUs to 10 11c2 ethernet 2 14 transmit window 10 To specify the maximum number of information PDUs that can be outstanding at any given time complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window choose Protocols The
93. ping is remote Sub Address Outbound or inbound calling or called party subaddress Type of Number Specifies the type of number that the remote or local caller uses international or unknown 308635 15 1 Rev 00 show llc2 interfaces Monitoring LLC Using the BCC show Commands The show llc2 interfaces command displays information about LLC2 interfaces including the current operational status and interface type This command allows for the following command filters flags and arguments enabled enabled disabled interface lt circuit_name gt Displays information for enabled or disabled interfaces only Displays information for the specified interface only The output includes the following information Receive Window Transmit Window Name Circuit name assigned to the interface State State of the LLC service up down init initializing disabled or absent Max Links Maximum number of end to end connections per LLC service Maximum number of unacknowledged information PDUs that LLC can receive Maximum number of information PDUs that can be outstanding at any given time Encapsulation Encapsulation technique that LLC should use default fr token ring csmacd source routing 308635 15 1 Rev 00 Configuring LLC Services show llc2 links The show llc2 links command displays general information about connections on the router
94. rd data link connection identifier number Function Provides the number of the virtual circuit to which you are mapping the local or remote MAC address Instructions Enter a decimal DLCI number assigned by your system administrator or frame relay provider MIB Object ID 1 3 6 1 4 1 18 3 5 1 6 9 1 3 308635 15 1 Rev 00 A 7 Configuring LLC Services Parameter Remote MAC Path Configuration Manager gt Protocols gt LLC2 gt Frame Relay PVC Mapping Default None Options Standard MSB token ring MAC addresses Function Provides the remote MAC address mapping outgoing requests to the DLCI value The remote MAC address must be unique with only DLCI mapping for a specific MAC address Instructions If you need to specify the real hardware address of the host enter it as an octal MIB Object ID string 1 3 6 1 4 1 18 3 5 1 6 9 1 5 Parameter Local MAC Path Configuration Manager Protocols LLC2 Frame Relay PVC Mapping Default None Options Standard MSB token ring MAC addresses Function Provides the local MAC address mapping incoming requests on this DLCI to that address The local MAC address must be unique with only DLCI mapping for a specific MAC address Instructions If the incoming connections are valid enter the MAC address of the recipient MIB Object ID 1 3 6 1 4 1 18 3 5 1 6 9 1 4 LLC2 Frame Relay PVC Mapping Parameters The LLC2 Frame Relay PVC Mappings window Figure A 4 allows you to edit and del
95. red the remote busy timer restarts and LLC waits again either for the remote busy cleared indication or for expiration of the remote busy timer interval Enter any valid value from 1 through 60 Choose a value that is appropriate for the applications that LLC2 supports 1 3 6 1 4 1 18 3 5 1 6 2 1 15 A 16 308635 15 1 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters Inactivity Timer Configuration Manager gt Protocols gt LLC2 gt Interfaces 30 s 1 to 30 Specifies the amount of time in seconds that the local LLC waits to receive a PDU soliciting the status of the remote LLC If the inactivity timer expires the local LLC sends an S format PDU with the P bit set to solicit the status of the remote LLC It initiates the acknowledgment timer to handle retries Enter any valid value from 1 through 30 This timer detects when an end station no longer responds The router uses the following formulas to recognize a nonresponsive LLC end station Inactivity Timer Ack Timer for Xmt Max Retry After TimeOut Defaults 30 1 10 40 seconds If you increase the Ack Timer for Xmt parameter value then you should consider decreasing the Inactivity Timer parameter value 1 3 6 1 4 1 18 3 5 1 6 2 1 18 Max Links Configuration Manager gt Protocols gt LLC2 gt
96. router supports frame relay with both data link switching DLSw and Advanced Peer to Peer Networking APPN based on RFC 1490 This chapter includes the following topics Topic Page Compatibility with RFC 1490 2 1 Compatibility with IBM NCP 7 1 and Later 2 2 FRAD like Functionality 2 4 Mapping DLCIs to MAC Addresses 2 4 Router Mapping Examples 2 5 LLC2 over Frame Relay Routed versus Bridged 2 12 Compatibility with RFC 1490 RFC 1490 describes an encapsulation method for carrying internetworking traffic over a frame relay backbone The description covers both bridging and routing standards The Nortel Networks router implementation of LLC exceeds RFC 1490 SNA encapsulation in frame relay only by complying with the Frame Relay Forum Frame Relay Multiprotocol Encapsulation Implementation Agreement FRE3 2 The latter description not only defines how routed SNA traffic traverses a frame relay network but also adds RFC 1490 support for frame relay to DLSw and APPN 308635 15 1 Rev 00 2 1 Configuring LLC Services This feature allows native SNA traffic originating from SDLC token ring or Ethernet attached devices to communicate over public or private frame relay networks directly with IBM 3745 or 3746 communications controllers It operates on all Nortel Networks routers that include a frame relay interface Devices can communicate with intermediate routing nodes or in a single switch con
97. rs for LLC2 Interfaces Parameter Values Function dup addr check enabled or Enables or disables a flag to force checking for duplicate disabled default addresses dynamic window enabled default or disabled Enables or disables the dynamic window encapsulation default tring csmacd srb fr Indicates the encapsulation method that LLC uses When you configure LLC2 over frame relay the default value is fr for other interfaces it is default high water reset normal default or reset Setting this parameter to reset sets HiWaterLinks to CurrentLinks idle timer integer 1 through 120 default 120 Specifies the idle time in seconds local response integer 1 through Specifies the local response timer for remote transmit window or 2 acktimer 10 default 10 rotation response in seconds max retries integer 1 Specifies the maximum number of times that an XID or TEST or 2 default command PDU is sent after the response timer runs out max saps integer 4 through Specifies the maximum number of SAPs per LLC service 255 default 255 n3 integer 1 default Specifies the maximum number of information PDUS that this LLC2 interface can receive before sending a local acknowledgment to the transmitter ui ackwait timer integer 1 through 30 default 30 Specifies the amount of time in seconds that LLC waits to receive an acknowledgment to a sent unnumbered XID
98. side the brackets Do not type the brackets when entering the command Example If the command syntax is ping ip address you enter ping 192 32 10 12 Indicates command names and options and text that you need to enter Example Enter show ip alerts routes Example Use the dinfo command Indicate required elements in syntax descriptions where there is more than one option You must choose only one of the options Do not type the braces when entering the command Example If the command syntax is show ip alerts routes you must enter either show ip alerts or show ip routes but not both Indicates new terms book titles and variables in command syntax descriptions Where a variable is two or more words the words are connected by an underscore Example If the command syntax is show at lt valid_route gt valid_route is one variable and you substitute one value for it Indicates system output for example prompts and system messages Example Set Trap Monitor Filters xiv 308635 15 1 Rev 00 separator gt vertical line Acronyms Preface Shows menu paths Example Protocols IP identifies the IP option on the Protocols menu Separates choices for command keywords and arguments Enter only one of the choices Do not type the vertical line when entering the command Example If the command syntax is show ip alerts routes you enter either show ip alerts or show
99. smissions is the maximum number of times that a PDU can be sent following expiration of the ack xmt timer or the reject timer You can enter a value from 1 through 10 For example the following command changes the maximum number of PDU retries to 5 llc2 ethernet 2 14 n25 llc2 ethernet 2 1H Using Site Manager To specify the maximum number of times that a PDU can be sent following the expiration of the Ack Timer for Xmt or the Reject Timer complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose LLC2 The LLC2 menu opens 3 Choose Interfaces The LLC2 Interface Configuration window opens 4 Click on the interface that you want to customize continued 308635 15 1 Rev 00 4 9 Configuring LLC Services Site Manager Procedure continued You do this 5 Set the Max Retry After TimeOut parameter Click on Help or see the parameter description on page A 14 System responds 6 Click on Apply 7 Click on Done You return to the Configuration Manager window Setting the Maximum Number of LLC2 Interface Connections The following sections describe how to set the maximum number of LLC2 interface connections using the BCC or Site Manager Using the BCC To specify the maximum number of logically independent end to end connections that the l
100. switch assigns the DLCI number on a per call basis The destination MAC address is mapped to a data network address X 121 or E 164 number address subaddress numbering plan and type of number You configure the numbering plan numbers for example X 121 or E 164 Each record contains one mapping and mapping type either local or remote Remote Mapping Use remote mapping to map a remote MAC address to a remote data network address DNA for outgoing calls If you configure only remote mappings the router can initiate an SVC setup but it cannot accept incoming calls The router accepts incoming calls from any MAC address to the destination MAC address configured in the mapping and establishes the SVC Local Mapping Local mapping maps the called DNA in the incoming setup message to the local MAC address The router accepts the local DNA from the frame relay SVC configured in the mapping and establishes the SVC The local DNA from the frame relay SVC configuration serves as the source DNA If you configure only local mappings the router can accept incoming calls but it cannot initiate calls Using the BCC To configure DLSw and LLC2 on a frame relay BNN interface using SVCs you first configure DLSw global attributes Then you configure frame relay LLC2 and DLSw on that interface For example to configure DLSw and LLC2 on a frame relay BNN SVC interface over a serial line with default settings 1 In configuration mode navigat
101. tocols menu opens choose Protocols 2 Choose LLC2 The LLC2 menu opens 3 Choose Interfaces The LLC2 Interface Configuration window opens 4 Click on the interface that you want to customize 5 Setthe Frame Relay Virtual MAC Address Mask parameter Click on Help or see the parameter description on page A 18 6 Click on Apply 7 Click on Done You return to the Configuration Manager window Enabling Frame Relay MAC Address Translation to a Virtual SAP If you configure frame relay BNN SVC and DLSw on an interface you can enable the translation of multiple source MAC addresses and SAPs that are addressed to the same destination MAC to one virtual SAP When you enable this feature multiple clients with different source MAC addresses can use the same frame relay SVC configured on this interface to send information to a specific destination MAC address By default this feature is disabled To direct multiple client connection requests to a single destination MAC address over a single SVC frame relay maps the source MAC and source SAP to a unique virtual SAP Each SVC can support up to 63 connections SAPs If this maximum number of SAPs is reached a new SVC is created At the receiving side the virtual SAPs are converted and the source MAC address is automatically created 308635 15 1 Rev 00 Customizing LLC Services Using the BCC To direct multiple client connection requests for a single
102. upport xvii publications hard copy xvii PVC support 1 5 R Receive Window parameter A 13 Reject Timer parameter A 16 308635 15 1 Rev 00 Remote MAC parameter A 8 response PDUs disconnected mode DM 1 19 exchange identification XID 1 17 information T 1 18 receiver ready RR 1 18 test TEST 1 17 RFC 1490 frame relay standard 1 5 2 1 router omitting with mainframe and DSPUs 2 2 used as FRAD 2 2 2 4 S SAP addressing scheme global 1 13 group 1 13 individual 1 13 null 1 13 source SAP SSAP field in 1 12 Send Window parameter A 14 show llc2 commands B 1 source SAP SSAP field 1 12 Starting APPN and LLC2 over frame relay 3 21 Starting LLC2 over ATM LANE 3 8 starting LLC2 services and APPN over frame relay 3 21 using Site Manager 3 7 Sub Addr parameter A 4 support Nortel Networks xvii supported media Ethernet 1 2 FDDI 1 2 native frame relay 1 2 source route bridging 1 2 synchronous 1 2 token ring 1 2 SVC support 1 5 1 6 T technical publications xvii technical support xvii Technician Interface A 2 Index 3 text conventions xiv Type of Number parameter A 5 types of operations numbered and unnumbered 1 9 V virtual MAC address mask A 18 virtual MAC to frame relay mapping 2 6 Virtual Ring Number parameter A 18 X X121 Addr parameter A 4 Index 4 308635 15 1 Rev 00
103. ure 1 1 illustrates the connection of a host through a frame relay network in a configuration with multiprotocol traffic to other locations 308635 15 1 Rev 00 Configuring LLC Services Host Frame relay network Single switch DLSw DLSw Nortel Networks router Nortel Networks router Client Client LLCOOISA Figure 1 1 Sample Frame Relay Network Nortel Networks provides two ways to communicate directly with an SNA processor such as an IBM 3745 or AS 400 over frame relay e Boundary Network Node BNN e Boundary Access Node BAN 1 4 308635 15 1 Rev 00 Logical Link Control Overview Boundary Network Node The Boundary Network Node refers to the RFC 1490 specification for routed SNA over frame relay This implementation of LLC2 also complies with the Frame Relay Forum Frame Relay Multiprotocol Encapsulation Implementation Agreement FRE 3 2 which defines how SNA traffic traverses a frame relay network BNN allows native SNA traffic originating from SDLC LAN or WAN attached devices to communicate over public or private frame relay networks directly with an SNA processor Devices can communicate with intermediate routing nodes or in a single switch configuration function as a Frame Relay Access Device FRAD Because BNN does not carry the destinatio
104. use with frame relay BNN PVC see Starting DLSw and LLC2 on a Frame Relay BNN PVC Interface on page 3 13 Using the BCC To edit frame relay PVC mappings that you previously configured navigate to the LLC2 DLCI prompt for example box serial 3 1 frame relay service service1 Ilc2 dici 101 and enter local mac ocal mac remote mac remote mac local mac is a standard MSB token ring MAC address that maps incoming requests on this DLCI to that address The local MAC address must be unique with only DLCI mapping for a specific MAC address remote mac is a standard MSB token ring MAC address that maps outgoing requests to the DLCI The remote MAC address must be unique with only DLCI mapping for a specific MAC address For example the following command changes the local and remote MAC addresses associated with DLCI 101 to 111111111111 and 222222222222 dlci 101 local mac 111111111111 remote mac 222222222222 dlci 101 4 16 308635 15 1 Rev 00 Customizing LLC Services Using Site Manager To edit and delete frame relay PVC mappings that you previously configured complete the following tasks Site Manager Procedure You do this System responds 1 In the Configuration Manager window The Protocols menu opens choose Protocols 2 Choose LLC2 The LLC2 menu opens 3 Choose Frame Relay PVC Mapping The LLC2 Frame Relay PVC Mappings window opens 4 Click on the DLCI that you want to ed
105. whether this is a remote or local mapping e X121 Addr address that is registered with frame relay to accept an incoming call if the mapping is local or to establish an SVC to the configured number if the mapping is remote e Sub Addr outbound or inbound calling or called party subaddress e Numbering Plan specifies whether this SVC uses the E 164 or X 121 number plan for address e Type of Number specifies the type of number the remote or local caller uses A 2 308635 15 1 Rev 00 Parameter Path Default Options Function Instructions MIB Object ID Site Manager Parameters MAC Address Mapping Type LOCAL X121 Addr Sub Addr Numbering Plan Type of Number INTERNATIONAL Figure A 1 LLC2 Frame Relay SVC Mapping Add Window MAC Address Configuration Manager gt Edit Circuit gt Services gt Protocols gt Edit LLC2 gt Frame Relay SVC Mapping gt Add None Standard MSB token ring MAC address Specifies the local or remote MAC address of the end station to be mapped Enter the MAC address that you want to use 1 3 6 1 4 1 18 3 5 1 6 10 1 3 308635 15 1 Rev 00 A 3 Configuring LLC Services Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Parameter Path Default Options Function Instructions MIB Object ID Mapping Type Configuration Manager gt Protocols gt

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