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Cisco Systems IC-23 User's Manual

1. Router config interface fastethernet 3 1 Router config if bridge group 10 Router config if cut through Router config if no shutdown Router config if exit Router config SLINEPROTO 5 UPDOWN Line protocol on Interface Fast Ethernet3 1 changed state to up SLINK 3 UPDOWN Interface Fast Ethernet3 1 changed state to up Cisco 10S Interface Configuration Guide i Configuring LAN Interfaces Hi LAN Interface Configuration Examples Router config interface ethernet 3 2 Router config if bridge group 20 Router config if cut through Router config if no shutdown Router config if exit Router config SLINEPROTO 5 UPDOWN Line protocol on Interface Ethernet3 2 changed state to up SLINK 3 UPDOWN Interface Ethernet3 2 changed state to up Router config interface ethernet 3 3 Router config if bridge group 20 Router config if cut through Router config if no shutdown Router config if exit Router config SLINEPROTO 5 UPDOWN Line protocol on Interface Ethernet3 3 changed state to up SLINK 3 UPDOWN Interface Ethernet3 3 changed state to up The following example shows integrated routing and bridging enabled on the bridge groups Bridge group 10 is assigned an IP address and subnet mask and the shutdown state is changed to up Bridge group 10 is configured to route IP Router config bridge irb Router config interface bvi 10 Router config i
2. When there is a problem with the LAN Extender a user at the remote site should contact you and report the condition of the LEDs located on the front panel of the LAN Extender You can then use this information to diagnose or verify the operation of the system Table 4 explains the LEDs Table 4 LED Trouble Indicators LED Condition Meaning POWER On Steady Indicates that 12 V DC is being supplied to the LAN Extender Off Indicates that power is not reaching the unit To correct the problem make sure the power supply is plugged into the wall receptacle and that the cable from the power supply is connected to he unit Cisco IOS Interface Configuration Guide IC 56 Configuring LAN Interfaces Configuring a LAN Extender Interface W Table 4 LED Trouble Indicators continued SYSTEM OK On Steady Lights when the unit passes the power on diagnostics This indicates proper operation Blinking Blinks while running startup diagnostics then goes on steady Blinking after the start up diagnostics indicates that a system error has been encountered Contact your system administrator who will have you disconnect and then reconnect the power to recycle your LAN Extender If the blinking continues check your WAN connection and the RX and TX LEDs Off An error condition has occurred Contact your system administrator who will ask you to disconnect the power cord and then reconnect it to re establish power
3. Configuring LAN Interfaces Hi LAN Interface Configuration Examples SNMP Illegal Address Trap Enablement for Hub Port Example The following example specifies the gateway IP address and enables an SNMP trap to be issued to the host 172 69 40 51 when a MAC address violation is detected on hub ports 2 3 or 4 It specifies that interface Ethernet 0 is the source for all traps on the router The community string is defined as the string public and the read write parameter is set ip route 0 0 0 0 0 0 0 0 172 22 10 1 snmp server community public rw snmp server trap source ethernet 0 snmp server host 172 69 40 51 public hub ethernet 0 2 4 snmp trap illegal address LAN Extender Enablement Interface Example The following simple example configures and creates a LAN Extender interface In this example the MAC address of the LAN Extender is 0000 0c00 0001 interface serial 4 encapsulation ppp interface lex 0 lex burned in address 0000 0c00 0001 ip address 131 108 172 21 255 255 255 0 LAN Extender Interface Access List Examples This section provides these examples of LAN extender interface configuration e MAC Address Filtering Example e Ethernet Type Code Filtering Example MAC Address Filtering Example The following is an example that controls which traffic from Macintosh computers on the remote Ethernet LAN reaches the core router access list 710 permit 0800 0298 0000 0000 0000 FFFF access list 710 deny 0800 0276 2917 0
4. If you do not assign a static MAC address on the port channel interface the Cisco IOS software automatically assigns a MAC address If you assign a static MAC address and then later remove it the Cisco IOS software automatically assigns a MAC address interface Port channell ip address 1 1 1 10 255 255 255 0 interface Port channel1 1 encapsulation isl 100 interface Fast Ethernet0 0 0 mac address 00e0 1476 7600 no ip address channel group 1 interface Fast Ethernet0 1 0 mac address 00e0 1476 7600 no ip address channel group 1 interface Fast Ethernet1 0 0 mac address 00e0 1476 7600 no ip address channel group 1 interface Fast Ethernet1 1 0 mac address 00e0 1476 7600 no ip address channel group 1 FDDI Frames Configuration Example The following example shows how to configure the FDDI interface to transmit four frames per token capture Enter global configuration mode 4700 configure terminal Enter interface configuration mode 4700 config interface fddid Show the ddi command options 4700 config if fddi encapsulate Enable FDDI Encapsulation bridging frames per token Maximum frames to transmit per service opportunity tl min time Line state transmission time token rotation time Set the token rotation timer valid transmission time Set transmission valid timer Show fddi frames per token command options 4700 config if fddi frames per token lt 1 10 gt Numbe
5. Purpose fddi valid transmission time microseconds Sets the FDDI valid transmission timer Controlling the Transmission Timer You can set the FDDI control transmission timer to control the FDDI TL Min time which is the minimum time to transmit a Physical Sublayer or PHY line state before advancing to the next Physical Connection Management or PCM state as defined by the X3T9 5 specification To do so use the following command in interface configuration mode Command Purpose fddi tl min time microseconds Sets the FDDI control transmission timer Modifying the C Min Timer You can modify the C Min timer on the PCM from its default value of 1600 microseconds by using the following command in interface configuration mode Command Purpose fddi c min microseconds Sets the C Min timer on the PCM Cisco 10S Interface Configuration Guide Configuring LAN Interfaces W Configuring a Fiber Distributed Data Interface Modifying the TB Min Timer You can change the TB Min timer in the PCM from its default value of 100 ms To do so use the following command in interface configuration mode Command Purpose fddi tb min milliseconds Sets TB Min timer in the PCM Modifying the FDDI Timeout Timer You can change the FDDI timeout timer in the PCM from its default value of 100 ms To do so use the following command in interface configuration mode Command Purpose fddi t
6. and a single contiguous data buffer A particle packet has the same packet type control structure but also maintains a queue of particle type structures each of which manages its own block Cisco 10S Interface Configuration Guide Bic Configuring LAN Interfaces W Configuring a Fiber Distributed Data Interface The scatter gather architecture used by particle based switching provides the following advantages e Allows drivers to use memory more efficiently especially when using media that has a large maximum transmission unit MTU For example Token Ring buffers could be 512 bytes rather than 16 KB e Allows concurrent use of the same region of memory For example on IP multicast a single packet is received and sent out on multiple interfaces simultaneously e Allows insertion or deletion of memory at any location in a packet not just at the beginning or end For information about configuring SRB over FDDI refer to the Configuring Source Route Bridging chapter of the Cisco IOS Bridging and IBM Networking Configuration Guide Using Connection Management Information Connection management CMT is an FDDI process that handles the transition of the ring through its various states off on active connect and so on as defined by the X3T9 5 specification The FIP provides CMT functions in microcode A partial sample output of the show interfaces fddi command follows along with an explanation of how to interpre
7. count Preallocates buffers to handle bursty FDDI traffic Configuring a Hub Interface The Cisco 2500 series routers includes routers that have hub functionality for an Ethernet interface The hub is a multiport repeater The advantage of an Ethernet interface over a hub is that the hub provides a star wiring physical network configuration while the Ethernet interface provides 1 OBASE T physical network configuration The router models with hub ports and their configurations are as follows e Cisco 2505 1 Ethernet 8 ports and 2 serial e Cisco 2507 1 Ethernet 16 ports and 2 serial e Cisco 2516 1 Ethernet 14 ports 2 serial and 1 ISDN BRI We provide SNMP management of the Ethernet hub as specified in RFC 1516 Definitions of Managed Objects for IEEE 802 3 Repeater Devices To configure hub functionality on an Ethernet interface perform the tasks in the following sections e Enabling a Hub Port Required e Disabling or Enabling Automatic Receiver Polarity Reversal Optional e Disabling or Enabling the Link Test Function Optional e Enabling Source Address Control Optional e Enabling SNMP Illegal Address Trap Optional For configuration examples see the Hub Configuration Examples section Cisco IOS Interface Configuration Guide Configuring LAN Interfaces Configuring a Hub Interface W Enabling a Hub Port To enable a hub port use the following commands in global configuration mode C
8. is as if you had defined an access lists with only a permit all entry All traffic passes across the interface Filtering by MAC Address and Vendor Code You can create access lists to administratively filter MAC addresses These access lists can filter groups of MAC addresses including those with particular vendor codes There is no noticeable performance loss in using these access lists and the lists can be of indefinite length You can filter groups of MAC addresses with particular vendor codes by creating a vendor code access list and then by applying an access list to an interface To create a vendor code access list use the following command in global configuration mode Command Purpose access list access list number Creates an access list to filter frames by canonical Ethernet ordered MAC permit deny address mask address amp Note Token Ring and FDDI networks swap their MAC address bit ordering but Ethernet networks do not Therefore an access list that works for one medium might not work for others E Cisco IOS Interface Configuration Guide Configuring LAN Interfaces Configuring a LAN Extender Interface W Once you have defined an access list to filter by a particular vendor code you can assign this list to a particular LAN Extender interface so that the interface will then filter based on the MAC source addresses of packets received on that LAN Extender interface To apply the acc
9. supports Station Management SMT Version 7 3 of the X3T9 5 FDDI specification offering a single MAC dual attach interface that supports the fault recovery methods of the dual attachment stations DASs The mid range platforms also support single attachment stations SASs Refer to the Cisco Product Catalog for specific information on platform and interface compatibility For installation and configuration information refer to the installation and configuration publication for the appropriate interface card or port adapter Source Route Bridging over FDDI on Cisco 4000 M Cisco 4500 M and Cisco 4700 M Routers Source route bridging SRB is supported on the FDDI interface to the Cisco 4000 M Cisco 4500 M and Cisco 4700 M routers For instructions on configuring autonomous FDDI SRB or fast switching SRB over FDDI refer to the Configuring Source Route Bridging chapter of the Cisco IOS Bridging and IBM Networking Configuration Guide Particle Based Switching of Source Route Bridge Packets on Cisco 7200 Series Routers Source route bridging SRB is supported over Fiber Distributed Data Interface FDDI Particle based switching is supported for SRB packets over FDDI and Token Ring by default Particle based switching adds scatter gather capability to SRB to improve performance Particles represent a communications data packet as a collection of noncontiguous buffers The traditional Cisco IOS packet has a packet type control structure
10. switching is supported for SRB packets over FDDI and Token Ring by default Particle based switching adds scatter gather capability to SRB to improve performance Particles represent a communications data packet as a collection of noncontiguous buffers The traditional Cisco IOS packet has a packet type control structure and a single contiguous data buffer A particle packet has the same packet type control structure but it also maintains a queue of particle type structures each of which manages its own block The scatter gather architecture used by particle based switching provides the following advantages e Allows drivers to use memory more efficiently especially when using media that has a large maximum transmission unit MTU For example Token Ring buffers could be 512 bytes rather than 16 KB e Allows concurrent use of the same region of memory For example on IP multicast a single packet is received and sent out on multiple interfaces simultaneously e Allows insertion or deletion of memory at any location in a packet not just at the beginning or end For information about configuring SRB over FDDI refer to the Configuring Source Route Bridging chapter of the Cisco IOS Bridging and IBM Networking Configuration Guide Cisco IOS Interface Configuration Guide Configuring LAN Interfaces Configuring a Token Ring Interface W Dedicated Token Ring Port Adapter Token Ring In The Dedicated Token Ring port a
11. the show interfaces command to verify the interface s transmission mode Cisco IOS Interface Configuration Guide Configuring LAN Interfaces amp Configuring an Ethernet or Fast Ethernet Interface W Note If you use the full duplex and the half duplex commands to change the transmission mode of the first two PA 12E 2FE interfaces port 0 and port 1 the transmission speed of the two PA 12E 2FE interfaces automatically defaults to 100 Mbps The first two PA 12E 2FE interfaces only operate at 10 Mbps when the interfaces are autosensing and autonegotiating the proper connection speed 10 Mbps or 100 Mbps with an attached device To configure the PA 12E 2FE port adapter perform the tasks in the following sections e Configuring the PA 12E 2FE Port Adapter Required e Monitoring and Maintaining the PA 12E 2FE Port Adapter Optional e Configuring Bridge Groups Using the 12E 2FE VLAN Configuration WebTool Optional Note If you plan to use a PA 12E 2FE interface to boot from a network using TFTP ensure that the interface is configured for a loop free environment an IP address is configured for the interface s bridge group virtual interface and system boot image 11 2 10 P is installed on your router use the show version command to view your router s system boot image Then before booting from the network server use the bridge group bridge group number spanning disabled command to disable the Spanning Tree
12. 00 Mbps transmission over UTP cables The PA 12E 2FE port adapter offloads Layer 2 switching from the host CPU by using store and forward or cut through switching technology between interfaces within the same virtual LAN VLAN on the PA 12E 2FE port adapter The PA 12E 2FE port adapter supports up to four VLANSs bridge groups Note The PA 12E 2FE port adapter is a dual width port adapter which means it occupies two horizontally aligned port adapter slots when installed in a Cisco 7200 series router Single width port adapters occupy individual port adapter slots in a Cisco 7200 series router All interfaces on the PA 12E 2FE port adapter support autosensing and autonegotiation of the proper transmission mode half duplex or full duplex with an attached device The first two PA 12E 2FE interfaces port 0 and port 1 also support autosensing and autonegotiation of the proper connection speed 10 Mbps or 100 Mbps with an attached device If an attached device does not support autosensing and autonegotiation of the proper transmission mode the PA 12E 2FE interfaces attached to the device automatically enter half duplex mode Use the show system running config command to determine if a PA 12E 2FE interface is autosensing and autonegotiating the proper transmission mode with an attached device Use the full duplex and the half duplex commands to change the transmission mode of a PA 12E 2FE interface After changing the transmission mode use
13. 000 0000 0000 access list 710 permit 0800 0000 0000 0000 FFFF FFFF interface lex 0 lex input address list 710 The first line of this access list permits traffic from any Macintosh whose MAC address starts with 0800 0298 The remaining two octets in the MAC address can be any value because the mask for these octets is FFFF don t care bits The second line specifically rejects all traffic originating from a Macintosh with the MAC address of 0800 0276 2917 Note that none of the mask bits are don t care bits The third line specifically permits all traffic from other Macintoshes whose MAC addresses start with 0800 Note that in the mask the don t care bits are the rest of the address At the end of the list is an implicit deny everything entry meaning that any address that does not match an address or address group on the list is rejected Cisco IOS Interface Configuration Guide Configuring LAN Interfaces LAN Interface Configuration Examples W Ethernet Type Code Filtering Example Using the same configuration as in the previous section you could allow only the Macintosh traffic by Ethernet type code with the following access list access list 220 permit 0x809B 0x0000 interface lex 0 lex input type list 220 This access list permits only those messages whose protocol number matches the masked protocol number in the first line The implicit last entry in the list is a deny everything en
14. Configuring Fast EtherChannel section Ethernet and Fast Ethernet Interface Configuration Task List Perform the tasks in the following sections to configure features on an Ethernet or Fast Ethernet interface e Specifying an Ethernet or Fast Ethernet Interface Required e Specifying an Ethernet Encapsulation Method Optional e Specifying Full Duplex Operation Optional e Specifying the Media and Connector Type Optional e Extending the 1OBASE T Capability Optional e Configuring Fast Ethernet 1OOBASE T Optional e Configuring PA 12E 2FE Port Adapter Optional e Configuring the 100VG AnyLAN Port Adapter Optional Cisco IOS Interface Configuration Guide Configuring LAN Interfaces Configuring an Ethernet or Fast Ethernet Interface W Specifying an Ethernet or Fast Ethernet Interface To specify an Ethernet interface and enter interface configuration mode use one of the following commands in global configuration mode Command Purpose interface ethernet number Begins interface configuration interface ethernet slot port Begins interface configuration for the Cisco 7200 and Cisco 7500 series routers interface ethernet slot port adapter port Begins interface configuration for Cisco 7500 series routers interface fastethernet number Begins interface configuration for the Cisco 4000 series with a Fast Ethernet NIM installed interface fastethernet slot port Specifies a Fa
15. Configuring LAN Interfaces Use the information in this chapter to configure LAN interfaces supported on Cisco routers and access servers This chapter describes the processes for configuring LAN interfaces in the following sections e Configuring an Ethernet or Fast Ethernet Interface e Configuring Fast EtherChannel e Configuring a Fiber Distributed Data Interface e Configuring a Hub Interface e Configuring a LAN Extender Interface e Configuring a Token Ring Interface For examples of configuration tasks see the LAN Interface Configuration Examples section For hardware technical descriptions and information about installing interfaces refer to the hardware installation and configuration publication for your product For a complete description of the LAN interface commands used in this chapter refer to the Interface Commands chapter of the Cisco IOS Interface Command Reference To locate documentation of other commands that appear in this chapter use the command reference master index or search online Configuring an Ethernet or Fast Ethernet Interface Cisco supports both 10 Mbps Ethernet and 100 Mbps Fast Ethernet Support for the 10 Mbps and 100 Mbps Ethernet interface is supplied on various Ethernet network interface cards or systems The Fast Ethernet NP 1FE module for example provides the following benefits e VLAN routing Virtual LAN VLAN support enables network managers to group users logically rather than by p
16. EtherChannel and routers attached to Fast EtherChannel links can provide full multiprotocol routing with support for host standby using Host Standby Router Protocol HSRP The port channel consisting of up to four Fast Ethernet interfaces is treated as a single interface Port channel is used in the Cisco IOS software to maintain compatibility with existing commands on the Catalyst 5000 switch You create the Fast EtherChannel by using the interface port channel interface configuration command You can assign up to four Fast Ethernet interfaces to a port channel by using the channel group interface configuration command Fast EtherChannel also supports the following two features e Support for host standby using Host Standby Router Protocol HSRP For more information about configuring HSRP refer to the Configuring IP Services chapter in the Cisco IOS IP and IP Routing Configuration Guide e Support for Cisco Express Forwarding CEF and distributed CEF dCEF For more information about configuring CEF refer to the Cisco Express Forwarding chapter in the Cisco IOS Switching Services Configuration Guide For information on how to configure Ethernet or Fast Ethernet see the tasks listed in the Configuring an Ethernet or Fast Ethernet Interface section Fast EtherChannel Configuration Task List Perform the tasks in the following sections to configure Fast EtherChannel To configure Fast EtherChannel perform the following
17. Interface S a SO 2 LAN Extender Core router MAC Address 00 00 0c 01 00 05 Serial Available LAN MAC Interface Extender Interfaces Address SO 0 00 00 0c 00 00 01 S1 1 00 00 0c 00 01 03 S2 2 00 00 0c 01 00 05 PPP 1 S1 gt negotiation i S0 E S2 Core router LAN Extender 2 lt My MAC address 00 00 0c 01 00 05 00 00 0c 01 00 05 corresponds to 3 LAN Extender interface 2 on serial interface 2 So Core router aa LAN Extender eu ET v 2922 LAN Extender interface 2 and hence LAN extender is bound to serial interface 2 Cisco 10S Interface Configuration Guide Configuring LAN Interfaces WE Configuring a LAN Extender Interface LAN Extender Interface Configuration Task List To configure a LAN Extender interface perform the tasks described in the following sections e Configuring and Creating a LAN Extender Interface Required e Defining Packet Filters Optional e Controlling Priority Queueing Optional e Controlling the Sending of Commands to the LAN Extender Optional e Shutting Down and Restarting the LAN Extender s Ethernet Interface Optional e Restarting the LAN Extender Optional e Downloading a Software Image to the LAN Extender Optional e Troubleshooting the LAN Extender Optional To monitor the LAN Extender interface see the Monitoring and Maintaining the Interface section in the Interface Configuration Overview chapter For configuratio
18. Protocol configured on the interface to keep the TFTP server from timing out and closing the session For detailed information about booting from a network using TFTP loading a system image from a network server and configuring the Spanning Tree Protocol on your Cisco 7200 series router refer to the PA 12E 2FE Ethernet Switch Port Adapter book that accompanies the hardware and to the Cisco IOS Bridging and IBM Networking Configuration Guide For information on other commands that can be used to configure a PA 12E 2FE port adapter refer to the Interfaces Commands chapter in the Cisco IOS Interface Command Reference For information on bridging refer to the Configuring Transparent Bridging chapter in the Cisco IOS Bridging and IBM Networking Configuration Guide For PA 12E 2FE port adapter configuration examples see the PA 12E 2FE Port Configuration Examples section Configuring the PA 12E 2FE Port Adapter This section provides instructions for a basic configuration You might also need to enter other configuration commands depending on the requirements for your system configuration and the protocols you plan to route on the interface For complete descriptions of configuration commands and the configuration options available refer to the other configuration guides in the Cisco IOS documentation set Cisco 10S Interface Configuration Guide Configuring LAN Interfaces WE Configuring an Ethernet or Fast Ethe
19. Selects SAP Ethernet encapsulation encapsulation snap Selects SNAP Ethernet encapsulation For an example of selecting Ethernet encapsulation for IP see the Ethernet Encapsulation Enablement Example section Cisco 10S Interface Configuration Guide Configuring LAN Interfaces WE Configuring an Ethernet or Fast Ethernet Interface Specifying Full Duplex Operation The default is half duplex mode on the FEIP2 DSW 2FX To enable full duplex mode on the FEIP2 DSW 2FX for a maximum aggregate bandwidth of 200 Mbps use either of the following commands in interface configuration mode Command Purpose ull duplex Enables full duplex on the Fast Ethernet interface of the FEIP2 DSW 2FX or no half duplex For an example to enable full duplex mode on Fast Ethernet see the Full Duplex Enablement Operation Example section A Caution To prevent system problems do not configure both FEIP2 DSW 2FX interfaces for full duplex operation at the same time amp Note The FEIP2 DSW 2TX supports half duplex only and should not be configured for full duplex Specifying the Media and Connector Type You can specify that the Ethernet network interface module NIM on the Cisco 4000 series routers use either the default of an AUI and a 15 pin connector or 10BASE T and an RJ 45 connector To do so use one of the following commands in interface configuration mode Command Purpose
20. _Configuring LAN Interfaces Configuring a LAN Extender Interface W Configuring a LAN Extender Interface The Cisco 1001 and Cisco 1002 LAN Extenders are two port chassis that connect a remote Ethernet LAN to a core router at a central site see Figure 3 The LAN Extender is intended for small networks at remote sites Overview information for LAN extender interfaces is provided in these sections e Connecting a LAN Extender to a Core Router e Installing a LAN Extender at a Remote Site e Discovering the MAC Address e Upgrading Software for the LAN Extender e Configuring the LAN Extender For examples of LAN Extender interface configuration tasks see the LAN Extender Interface Configuration Task List section Connecting a LAN Extender to a Core Router The remote site can have one Ethernet network The core router can be a Cisco 2500 series Cisco 4000 series Cisco 4500 series Cisco 4700 series Cisco 7500 series or AGS router running Cisco IOS Release 10 2 2 and later which support the LAN Extender host software Figure 3 shows the connection between the LAN Extender and the core router via a short leased serial line typically a 56 kbps or 64 kbps line However the connection can also be via T1 or E1 lines Figure 3 Cisco 1000 Series LAN Extender Connection to a Core Router SO y Other Oa Remote networks LAN Core router LAN Extender 2921 Expanded View of the Connection to a Core Router Figure 4 is an expa
21. a different MAC address cause the port to be disabled The port is enabled again after 1 minute and the MAC address of incoming packets is checked again To enable source address control on a per port basis use the following command in hub configuration mode Command Purpose source address mac address Enables source address control If you omit the optional MAC address the hub remembers the first MAC address it receives on the selected port and allows only packets from the learned MAC address See the examples of establishing source address control in the Hub Configuration Examples section Enabling SNMP Illegal Address Trap To enable the router to issue an SNMP trap when an illegal MAC address is detected on an Ethernet hub port use the following commands in hub configuration mode Command Purpose Step1 hub ethernet number port end port Specifies the hub number and the hub port or range of hub ports and enters hub configuration mode Step2 snmp trap illegal address Enables the router to issue an SNMP trap when an illegal MAC address is detected on the hub port You may need to set up a host receiver for this trap type snmp server host for a Network Management System NMS to receive this trap type The default is no trap For an example of configuring a SNMP trap for an Ethernet hub port see the Hub Configuration Examples section Cisco IOS Interface Configuration Guide
22. ching and source route bridging Layer 2 switching on a per protocol basis For example IP traffic could be routed while SNA traffic is bridged Routing features enhance source route bridges The Token Ring MIB variables support the specification in RFC 1231 IEEE 802 5 Token Ring MIB The mandatory Interface Table and Statistics Table are implemented but the optional Timer Table of the Token Ring MIB is not The Token Ring MIB has been implemented for the Token Ring Interface Processor TRIP Use the show interfaces show controllers token and show controllers cbus EXEC commands to display the Token Ring numbers These commands provide a report for each ring that Cisco IOS software supports Note If the system receives an indication of a cabling problem from a Token Ring interface it puts that interface into a reset state and does not attempt to restart it It functions this way because periodic attempts to restart the Token Ring interface drastically affect the stability of routing tables Once you have again plugged the cable into the MAU restart the interface by using the clear interface tokenring command where the number argument is the interface number By default the Token Ring interface uses the SNAP encapsulation format defined in RFC 1042 It is not necessary to define an encapsulation method for this interface Particle Based Switching of Source Route Bridge Packets on Cisco 7200 Series Routers Particle based
23. dapter PA 4R DTR is available on Cisco 7500 series routers Cisco 7200 series routers and Cisco 7000 series routers with the 7000 Series Route Switch Processor RSP7000 and 7000 Series Chassis Interface RSP7000CI The PA 4R DTR provides up to four IBM Token Ring or IEEE 802 5 Token Ring interfaces Each Token Ring interface can be set for 4 Mbps or 16 Mbps half duplex or full duplex operation and can operate as a standard Token Ring station or as a concentrator port The default for all interfaces is Token Ring station mode with half duplex 16 Mbps operation The PA 4R DTR connects over Type lobe or Type 3 lobe cables with each interface providing an RJ 45 receptacle terface Configuration Task List Perform the tasks in the following sections to configure a Token Ring interface e Specifying a Token Ring Interface Required e Enabling Early Token Release Optional e Configuring PCbus Token Ring Interface Management Optional e Enabling Token Ring Concentrator Port Optional e Monitoring and Maintaining the Port Optional Specifying a Token Ring Interface To specify a Token Ring interface and enter interface configuration mode use one of the following commands in global configuration mode Command Purpose interface tokenring number Begins interface configuration interface tokenring slot port Begins interface configuration for the Cisco 7200 or Cisco 7500 series routers interface tokenring slot port adapter port B
24. e To support this new feature the media type interface command has been modified The media type interface command now supports two options e 100basex Specifies an RJ 45 100BASE X physical connection e mii Specifies a media independent interface Second generation Fast Ethernet Interface Processors FEIP2 DSW 2TX and FEIP2 DSW 2FX are available on Cisco 7500 series routers and on Cisco 7000 series routers with the 7000 Series Route Switch Processor RSP7000 and 7000 Series Chassis Interface RSP7000CI The FEIP2 DSW is a dual port fixed configuration interface processor that provides two 100 Mbps Fast Ethernet FE interfaces Each interface on the FEIP2 DSW supports half duplex only for a maximum aggregate bandwidth of 200 Mbps Refer to the Cisco Product Catalog for specific platform and hardware compatibility information Use the show interfaces show controllers mci and show controllers cbus EXEC commands to display the Ethernet port numbers These commands provide a report for each interface supported by the router or access server Use the show interface fastethernet command to display interface statistics and use the show controller fastethernet to display the information about the Fast Ethernet controller chip The output shows Statistics including information about initialization block information transmit ring receive ring and errors For information on how to configure Fast EtherChannel see the tasks listed in the
25. e machine The ten bits of CMT information are transmitted and received in the Signal State The NEXT state is used to separate the signaling performed in the Signal State Therefore in the preceding sample output the NEXT state was entered 11 times Note The display line showing transition states is not generated if the FDDI interface has been shut down or if the cmt disconnect command has been issued or if the fddi if cmt command has been issued The fddi if emt command applies to the Cisco 7500 series routers only Cisco IOS Interface Configuration Guide Configuring LAN Interfaces Configuring a Fiber Distributed Data Interface W The CFM state is through A in the sample output which means this interface s Phy A has successfully completed CMT with the Phy B of the neighbor and Phy B of this interface has successfully completed CMT with the Phy A of the neighbor The display or nondisplay of the upstream and downstream neighbor does not affect the ability to route data Since the upstream neighbor is also its downstream neighbor in the sample there are only two stations in the ring the network server and the router at address 0800 2008 C52E FDDI Configuration Task List Perform the tasks in the following sections to configure an FDDI interface Specifying a FDDI Specifying a FDDI Required Enabling FDDI Bridging Encapsulation Optional Enabling Full Duplex Mode on the FDDI Optional Setting the Tok
26. eed to auto negotiates speed only and setting duplex to auto negotiates duplex only Table 3 describes the access server s performance for different combinations of the duplex and speed command options The specified duplex command option plus the specified speed command option produces the resulting system action Cisco 10S Interface Configuration Guide Configuring LAN Interfaces W Configuring an Ethernet or Fast Ethernet Interface Table 3 Relationship Between Duplex and Speed Command Options Duplex Command Speed Command Resulting System Actions duplex auto speed auto Autonegotiates both speed and duplex modes duplex auto speed 100 Or speed 10 Autonegotiates both speed and duplex modes duplex half speed auto Autonegotiates both speed and duplex modes or duplex full duplex half speed 10 Forces 10 Mbps and half duplex duplex full speed 10 Forces 10 Mbps and full duplex duplex half speed 100 Forces 100 Mbps and half duplex duplex full speed 100 Forces 100 Mbps and full duplex Configuring PA 12E 2FE Port Adapter amp The PA 12E 2FE Ethernet switch port adapter provides Cisco 7200 series routers with up to twelve 10 Mbps and two 10 100 Mbps switched Ethernet 10BASE T and Fast Ethernet 100BASE TX interfaces for an aggregate bandwidth of 435 Mbps full duplex The PA 12E 2FE port adapter supports the Ethernet IEEE 802 3 and IEEE 802 3u specifications for 10 Mbps and 1
27. egins interface configuration for the Cisco 7500 series routers Enabling Early To Command ken Release Cisco Token Ring interfaces support early token release a method whereby the interface releases the token back onto the ring immediately after transmitting rather than waiting for the frame to return This feature can help to increase the total bandwidth of the Token Ring To configure the interface for early token release use the following command in interface configuration mode Purpose early token release Enables early token release Cisco 10S Interface Configuration Guide E Configuring LAN Interfaces Hi LAN Interface Configuration Examples Configuring PCbus Token Ring Interface Management The Token Ring interface on the AccessPro PC card can be managed by a remote LAN manager over the PCbus interface Currently the LanOptics Hub Networking Management software running on an IBM compatible PC is supported To enable LanOptics Hub Networking Management of a PCbus Token Ring interface use the following command in interface configuration mode Command Purpose local 1nm Enables PCbus LAN management Enabling Token Ring Concentrator Port To enable an interface to operate as a concentrator port use the following command in interface configuration mode Command Purpose port Specifies concentrator port operation Monitoring and Maintaining the Port To monitor the Tok
28. en Ring Concentrator Port use one or more of the following commands in EXEC mode Command Purpose show controllers token Displays internal state information about the Token Ring interfaces in the system show interface token Displays high level statistics for a particular interface LAN Interface Configuration Examples This section provides examples to illustrate configuration tasks described in this chapter The following examples are included e Ethernet Encapsulation Enablement Example e Full Duplex Enablement Operation Example e PA 12E 2FE Port Configuration Examples e PA VG100 Port Adapter Configuration Example e Fast EtherChannel Configuration Examples e FDDI Frames Configuration Example e Hub Configuration Examples e LAN Extender Enablement Interface Example e LAN Extender Interface Access List Examples Cisco 10S Interface Configuration Guide Configuring LAN Interfaces LAN Interface Configuration Examples W Ethernet Encapsulation Enablement Example These commands enable standard Ethernet Version 2 0 encapsulation on the Ethernet interface processor in slot 4 on port 2 of a Cisco 7500 series routers interface ethernet 4 2 encapsulation arpa Full Duplex Enablement Operation Example The following example assigns an IP address and subnet mask specifies an MII Ethernet connector and enables full duplex mode on Fast Ethernet interface port 0 in slot 1 port adapter 0 Router Router Route
29. en Rotation Time Optional Setting the Transmission Valid Timer Optional Controlling the Transmission Timer Optional Modifying the C Min Timer Optional Modifying the TB Min Timer Optional Modifying the FDDI Timeout Timer Optional Controlling SMT Frame Processing Optional Enabling Duplicate Address Checking Optional Setting the Bit Control Optional Controlling the CMT Microcode Optional Starting and Stopping FDDI Optional Setting FDDI Frames Per Token Limit Optional Controlling the FDDI SMT Message Queue Size Optional Preallocating Buffers for Bursty FDDI Traffic Optional To specify an FDDI interface and enter interface configuration mode use one of the following commands in global configuration mode Command Purpose interface fddi number Begins interface configuration interface fddi slot port Begins interface configuration for the Cisco 7200 or Cisco 7500 series routers Cisco 10S Interface Configuration Guide E Configuring LAN Interfaces W Configuring a Fiber Distributed Data Interface Enabling FDDI Bridging Encapsulation Command Cisco FDDI by default uses the SNAP encapsulation format defined in RFC 1042 It is not necessary to define an encapsulation method for this interface when using the FIP FIP fully supports transparent and translational bridging for the following configurations e FDDI to FDDI e FDDI to Ethernet e FDDI to Token Ring Enabling FDDI bridging encaps
30. ender interface use the following command in interface configuration mode Command Purpose lex priority group group Assigns a priority list to a LAN Extender interface which activates priority output queueing on the LAN Extender Controlling the Sending of Commands to the LAN Extender Each time the core router sends a command to the LAN Extender the LAN Extender responds with an acknowledgment The core router waits for the acknowledgment for a predetermined amount of time If it does not receive an acknowledgment in this time period the core router sends the command again By default the core router waits 2 seconds for an acknowledgment from the LAN Extender You might want to change this interval if your connection to the LAN Extender requires a different amount time To determine whether commands to the LAN Extender are timing out use the debug lex remd privileged EXEC command To change this interval use the following command in interface configuration mode Command Purpose lex timeout milliseconds Sets the amount of time that the core router waits to receive an acknowledgment from the LAN Extender By default the core router sends each command ten times before giving up The core router displays an error message when it gives up sending commands to the LAN Extender To change this default use the following command in interface configuration mode Command Purpose lex retry count number Sets the number of time
31. er E t E cer cer cer cer cer cer Cer cer cer cer Ethernet 0 Ethernet 0 Ethernet 1 Ethernet 1 1 configure con con con con con con con con con con fig i fig i fig fig i fig i fFig i fig fFig i fig i con con con con fig i fig fFig i fig i con con con con fig i fig fFig i fig i con con con con fig i fig fFig i fig i 1 i 0 1 T i 0 i fig if fig e con con terminal no shutdown exit nterface port channel ip address 1 1 1 10 exit nterface fastethernet no ip address channel group 1 added as member 1 to exit nterface fastethernet no ip address channel group 1 added as member 2 to exit nterface fastethernet no ip address channel group 1 added as member 3 to exit nterface fastethernet no ip address channel group 1 added as member 4 to exit xit fig interface port channel 1 1 1 255 255 255 0 encapsulation isl 100 0 0 0 port channell 0 1 0 port channell 1 0 0 port channell 1 1 0 port channell Cisco 10S Interface Configuration Guide Configuring LAN Interfaces Hi LAN Interface Configuration Examples The following is a partial example of a configuration file The MAC address is automatically added to the Fast Ethernet interface when the interfaces are added to the Fast EtherChannel Note
32. ess list to an interface use the following command in interface configuration mode Command Purpose lex input address list Assigns an access list to an interface for filtering by MAC source addresses access list number For an example of creating an access list and applying it to a LAN Extender interface see the LAN Extender Interface Access List Examples section Filtering by Protocol Type amp You can filter by creating a type code access list and applying it to a LAN Extender interface The LAN Extender interface can filter only on bytes 13 and 14 of the Ethernet frame In Ethernet packets these two bytes are the type field For a list of Ethernet type codes refer to the Ethernet Type Codes appendix in the Cisco IOS Bridging and IBM Networking Command Reference Volume I In 802 3 packets these two bytes are the length field You can filter by protocol type by creating a protocol type access list and then applying the access list to an interface Note Command Type code access lists can have an impact on system performance therefore keep the lists as short as possible and use wildcard bit masks whenever possible To create a protocol type access list use the following command in global configuration mode Purpose access list access list number Creates an access list to filter frames by protocol type permit deny type code wild mask Command To apply an access list to an
33. f ip address 1 1 15 1 255 255 255 0 Router config if no shutdown Router config if exit Router config SLINEPROTO 5 UPDOWN Line protocol on Interface BVI10 changed state to up Router config bridge 10 route ip Router config exit Router PA VG100 Port Adapter Configuration Example The following is an example of a basic configuration for the PA VG100 port adapter interface in slot 1 on a Cisco 7500 series router In this example IP routing is enabled on the router so an IP address and subnet mask are assigned to the interface configure terminal interface vg anylan 1 0 0 ip address 1 1 1 10 255 255 255 0 no shutdown exit exit Cisco 10S Interface Configuration Guide Configuring LAN Interfaces LAN Interface Configuration Examples Fast EtherChannel Configuration Examples Figure 10 shows four point to point Fast Ethernet interfaces that are aggregated into a single Fast EtherChannel interface Figure 10 ka t 200 Mbps Fast Ethernet Interfaces Aggregated into a Fast EtherChannel FE0 0 Fast EtherChannel 1 FE0 1 also called a port channel FE1 0 FE1 1 A 200 Mbps 400 Mbps 800 Mbps U S6697 The following is an example of how to create a Fast EtherChannel port channel interface with four Fast Ethernet interfaces In this example ISL is enabled on the Fast EtherChannel and an IP address is assigned to the subinterface cer c
34. filter packets by MAC address including vendor code and by Ethernet type code To define filters on the LAN Extender interface perform the tasks described in one or both of the following sections e Filtering by MAC Address and Vendor Code e Filtering by Protocol Type When setting up administrative filtering remember that there is virtually no performance penalty when filtering by vendor code but there can be a performance penalty when filtering by protocol type When defining access lists keep the following points in mind e You can assign only one vendor code access list and only one protocol type access list to an interface e The conditions in the access list are applied to all outgoing packets from the LAN Extender e The entries in an access list are scanned in the order you enter them The first entry that matches the outgoing packet is used e An implicit deny everything entry is automatically defined at the end of an access list unless you include an explicit permit everything entry at the end of the list This means that unless you have an entry at the end of an access list that explicitly permits all packets that do no match any of the other conditions in the access list these packets will not be forwarded out the interface e All new entries to an existing list are placed at the end of the list You cannot add an entry to the middle of a list e If you do not define any access lists on an interface it
35. hese protocols be routed whenever possible Enabling Full Duplex Mode on the FDDI Command To enable full duplex mode on the PA F FD SM and PA F FD MM port adapters use one of the following commands in interface configuration mode Purpose full duplex or no half duplex Enables full duplex on the FDDI interface of the PA F FD SM and PA F FD MM port adapter E Cisco IOS Interface Configuration Guide Configuring LAN Interfaces Setting the Token Rotation Time Configuring a Fiber Distributed Data Interface W You can set the FDDI token rotation time to control ring scheduling during normal operation and to detect and recover from serious ring error situations To do so use the following command in interface configuration mode Command Purpose fddi token rotation time microseconds Sets the FDDI token rotation time The FDDI standard restricts the allowed time to be greater than 4000 microseconds and less than 165 000 microseconds As defined in the X3T9 5 specification the value remaining in the token rotation timer TRT is loaded into the token holding timer THT Combining the values of these two timers provides the means to determine the amount of bandwidth available for subsequent transmissions Setting the Transmission Valid Timer You can set the transmission timer to recover from a transient ring error by using the following command in interface configuration mode Command
36. hysical location The high performance of the underlying Cisco 4700 combined with the feature rich NP 1FE makes it an ideal combination for a low density higher performance application such as inter VLAN routing e High speed interconnections The Fast Ethernet interface enables network managers to implement Fast Ethernet routing solutions for optimal cost and performance across a wide range of applications including campus or enterprise backbones and data centers It is also a low cost way to provide Fast Ethernet access to traditional low speed WAN services e Local area network aggregation The Cisco 4500 or the Cisco 4700 series routers can support as many as 12 Ethernet 4 Token Ring or 1 FDDI segment ISDN interfaces are also supported Cisco 10S Interface Configuration Guide om Configuring LAN Interfaces W Configuring an Ethernet or Fast Ethernet Interface With the Catalyst 3000 or Catalyst 5000 system the Fast Ethernet processor can be used to aggregate up to twelve 10 Mbps LANs and give them high speed access to such Layer 3 routing services as providing firewalls and maintaining access lists Cisco 7200 series routers support an I O controller with an RJ 45 interface You can configure the optional Fast Ethernet port for use at 100 Mbps full duplex or half duplex operation half duplex is the default The Fast Ethernet port is equipped with either a single MII receptacle or an MII receptacle and an RJ 45 receptacl
37. interface use the following command in interface configuration mode Purpose lex input type list access list number Adds a filter for Ethernet and SNAP encapsulated packets on input For an example of creating an access list and applying it to a LAN Extender interface see the LAN Extender Interface Access List Examples section Controlling Priority Queueing Priority output queueing is an optimization mechanism that allows you to set priorities on the type of traffic passing through the network Packets are classified according to various criteria including protocol and subprotocol type Packets are then queued on one of four output queues Cisco 10S Interface Configuration Guide Configuring LAN Interfaces WE Configuring a LAN Extender Interface To control priority queueing on a LAN Extender interface perform the following tasks e Set the priority by protocol type e Assign a priority group to an interface To establish queueing priorities based on the protocol type use one of the following commands in global configuration mode Command Purpose priority list list protocol protocol Establishes queueing priorities based on the protocol type high medium normal low or priority list list protocol bridge high medium normal low list list number You then assign a priority list to an interface You can assign only one list per interface To assign a priority list to a LAN Ext
38. ly improves your throughput when you have heavy or very bursty traffic To configure the FDDI interface to transmit a maximum number of frames per token capture use the following commands Command Purpose Step1 configure terminal Enters global configuration mode Step2 interface fddid Enters interface configuration mode Step3 fddi Shows fddi command options Step4 fddi frames per token Shows fddi frames per token command options Step5 fddi frames per token number Specifies the maximum number of frames to be transmitted per token capture Cisco 10S Interface Configuration Guide Configuring LAN Interfaces W Configuring a Hub Interface Controlling the FDDI SMT Message Queue Size You can set the maximum number of unprocessed FDDI Station Management SMT frames that will be held for processing Setting this number is useful if the router you are configuring gets bursts of messages arriving faster than the router can process them To set the number of frames use the following command in global configuration mode Command Purpose smt queue threshold number Sets SMT message queue size Preallocating Buffers for Bursty FDDI Traffic The FCI card preallocates three buffers to handle bursty FDDI traffic for example NFS bursty traffic You can change the number of preallocated buffers by using the following command in interface configuration mode Command Purpose fddi burst
39. media type aui Selects a 15 pin Ethernet connector media type 10baset Selects an RJ 45 Ethernet connector The default media connector type is an RJ 45 or SC fiber optic connector You can specify that the interface uses either an MII connector or an RJ 45 or SC fiber optic connector this is the default To do so use one of the following commands in interface configuration mode Command Purpose media type mii Selects an MII Ethernet connector media type 100basex Selects an RJ 45 Ethernet connector for the FEIP2 DSW 2TX or an SC connector for the FEIP2 DSW 2FX amp Note When using the I O controller that is equipped with an MII receptacle and an RJ 45 receptacle only one receptacle can be configured for use at a time E Cisco IOS Interface Configuration Guide Configuring LAN Interfaces Configuring an Ethernet or Fast Ethernet Interface Ml Extending the 10BASE T Capability Command On a Cisco 4000 series or Cisco 4500 series routers you can extend the twisted pair 1 OBASE T capability beyond the standard 100 meters by reducing the squelch signal cutoff time This feature applies only to the LANCE controller 1OBASE T interfaces LANCE is the AMD controller chip for the Cisco 4000 and Cisco 4500 Ethernet interface amp Note Does not apply to the Fast Ethernet interface To reduce squelch use the first command in the following table in interface configuration mode You can late
40. n it runs the software image that is shipped with the unit You can download a new software image from a TFTP server or from Flash memory on the core router to the LAN Extender To download a software image to the LAN Extender use one of the following commands in privileged EXEC mode Command Purpose copy tftp lex number Downloads a software image from a TFTP server copy flash lex number Downloads a software image from Flash memory Cisco 10S Interface Configuration Guide E Configuring LAN Interfaces WE Configuring a LAN Extender Interface Troubleshooting the LAN Extender The primary means of troubleshooting the LAN Extender is by using the light emitting diodes LEDs that are present on the chassis This section will help you assist the remote user at the LAN Extender site who can observe the LEDs The key to problem solving is to try to isolate the problem to a specific subsystem By comparing what the system is doing to what it should be doing the task of isolating a problem is greatly simplified The Cisco 1000 series LAN Extender uses multiple LEDs to indicate its current operating condition By observing the LEDs any fault conditions that the unit is encountering can be observed The system LEDs are located on the front panel of your LAN Extender see Figure 9 Figure 9 LAN Extender LEDs H2561 PO WER sys TEM ISDN ISDN LAN OK LAN eae LINK TX RX OK
41. n examples see the LAN Extender Enablement Interface Example and the LAN Extender Interface Access List Examples sections Configuring and Creating a LAN Extender Interface Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 To configure and create a LAN Extender interface you configure the LAN Extender interface itself and the serial interface to which the LAN Extender is physically connected The order in which you configure these two interface interfaces does not matter However you must first configure both interfaces in order for the LAN Extender interface to bind associate to the serial interface To create and configure a LAN Extender interface use the following commands starting in interface configuration mode Command Purpose interface lex number interface lex slot port Configures a LAN Extender interface in global configuration mode and enters interface configuration mode or Configures a LAN Extender on a Cisco 7000 series routers lex burned in address icee address Assigns the burned in MAC address from your LAN Extender to the LAN Extender interface ip address ip address mask Assigns a protocol address to the LAN Extender interface exit Returns to global configuration mode interface serial number Configures a serial interface in global configuration mode and enters interface configuration mode encapsulation ppp Enables PPP encapsulatio
42. n on the serial interface in interface configuration mode Ctrl Z Exits interface configuration mode copy system running config nvram startup config Saves the configuration to memory Note that there is no correlation between the number of the serial interface and the number of the LAN Extender interface These interfaces can have the same or different numbers E Cisco IOS Interface Configuration Guide _Configuring LAN Interfaces Configuring a LAN Extender Interface W amp Note Do not configure the MTU to a value other than the default value when you are configuring a LAN Extender interface Defining Packet Filters You can configure specific administrative filters that filter frames based on their source MAC address The LAN Extender forwards packets between a remote LAN and a core router It examines frames and transmits them through the internetwork according to the destination address and it does not forward a frame back to its originating network segment You define filters on the LAN Extender interface in order to control which packets from the remote Ethernet LAN are permitted to pass to the core router see Figure 7 These filters are applied only on traffic passing from the remote LAN to the core router Filtering on the LAN Extender interface is actually performed in the LAN Extender not on the core router This means that the filtering is done using the LAN Extender CPU thus offloading
43. nded view of Figure 3 that shows all the components of the LAN Extender connection to acore router On the left is the core router which is connected to the LAN Extender as well as to other networks In the core router you configure a LAN Extender interface which is a logical interface that connects the core router to the LAN Extender chassis In the core router you also configure a serial interface which is the physical interface that connects the core router to the LAN Extender You then bind or associate the LAN Extender interface to the physical serial interface Figure 4 shows the actual physical connection between the core router and the LAN Extender The serial interface on the core router is connected by a leased serial line to a serial port on the LAN Extender This creates a virtual Ethernet connection which is analogous to having inserted an Ethernet interface processor into the core router Cisco 10S Interface Configuration Guide E Configuring LAN Interfaces WE Configuring a LAN Extender Interface Figure 4 Expanded View of Cisco 1000 Series LAN Extender Connection Remote LAN Other ox networks B Ethernet LAN Extender Virtual Ethernet connection i Core Router LEX A Serial 2979 Management of the LAN Extender Interface Although there is a physical connection between the core router and the LAN Extender what you actually manage is a remote Ethernet LAN Figure 5 shows the connection y
44. nection Online including the Technical Assistance Center TAC 2 tac cisco com e mail the TAC 3 1 800 553 2447 or 1 408 526 7209 phone the TAC 4 cs html cisco com e mail the HTML interface development group B All Cisco routers running Cisco IOS Release 11 0 or later have a home page All Cisco router home pages are password protected Contact your network administrator if you do not have the name or password for your Cisco 7200 series router If your router has an installed PA 12E 2FE port adapter the 12E 2FE VLAN Configuration WebTool shown in Figure 2 can be accessed from the router s home page using a Java enabled web browser E Cisco IOS Interface Configuration Guide Configuring LAN Interfaces Configuring Fast EtherChannel W Configuring the 100VG AnyLAN Port Adapter The 100VG AnyLAN port adapter PA 100VG is available on Cisco 7200 series routers and on Cisco 7500 series routers The PA 100VG provides a single interface compatible with and specified by IEEE 802 12 to support 100 Mbps over Category 3 or Category 5 unshielded twisted pair UTP cable with RJ 45 terminators The PA 100VG supports 802 3 Ethernet packets and can be monitored with the IEEE 802 12 Interface MIB To configure the PA 100VG port adapter use the following commands beginning in global configuration mode Command Purpose Step1 interface vg anylan Specifies a 1OOVG AnyLAN interface and enters interface slot
45. ng LAN Interfaces WE Configuring Fast EtherChannel Configuring the Fast Ethernet Interfaces To assign the Fast Ethernet interfaces to the Fast EtherChannel use the following commands beginning in global configuration mode Command Purpose Step1 interface fastethernet Creates or modifies an existing Fast Ethernet interface and enters interface slot port adapter port configuration mode Step2 no ip address Disables the IP address before performing the next step if the Fast Ethernet interface already exists and has an IP address assigned Step3 channel group channel number Assigns the Fast Ethernet interfaces to the Fast EtherChannel The channel number is the same as the channel number you specified when you created the port channel interface Step4 exit Exits interface configuration mode Repeat Steps through 4 to add up to four Fast Ethernet interfaces to the Fast EtherChannel Step5 end Optional Enables other supported interface commands to execute and exits when they have finished Step6 show interface port channel Displays information about the Fast Ethernet interface so you can verify the configuration A Caution The port channel interface is the routed interface Do not enable Layer 3 addresses on the physical Fast Ethernet interfaces Do not assign bridge groups on the physical Fast Ethernet interfaces because it creates loops Also you must disable spanning tree To remove a Fast E
46. nnel even if the line protocol goes down This can result in unpredictable behavior The implementation of the Port Aggregation Protocol in a subsequent release of this feature will remove the dependency on keepalives See the LAN Interface Configuration Examples section for configuration examples You can monitor the status of the Fast EtherChannel interface by using the show interfaces port channel EXEC command Configuring a Fiber Distributed Data Interface The Fiber Distributed Data Interface FDDI is an ANSI defined standard for timed 100 Mbps token passing over fiber optic cable FDDI is not supported on access servers An FDDI network consists of two counter rotating token passing fiber optic rings On most networks the primary ring is used for data communication and the secondary ring is used as a hot standby The FDDI standard sets a total fiber length of 200 kilometers The maximum circumference of the FDDI network is only half the specified kilometers because of the wrapping or looping back of the signal that occurs during fault isolation The FDDI standard allows a maximum of 500 stations with a maximum distance between active stations of two kilometers when interconnecting them with multimode fiber or ten kilometers when interconnected via single mode fiber both of which are supported by our FDDI interface controllers The FDDI frame can contain a minimum of 17 bytes and a maximum of 4500 bytes Our implementation of FDDI
47. nnel interface the Cisco IOS software automatically assigns a MAC address If you assign a static MAC address and then later remove it the Cisco IOS software automatically assigns a MAC address end Optional Enables other supported interface commands to execute and exits when they have finished show interface port channel Displays information about the port channel interface so you can verify the configuration N Note If you want to use the Cisco Discovery Protocol CDP you must configure it on the physical Ethernet Fast Ethernet or GigabitEthernet interface not on the port channel interface A Caution With Release 11 1 20 CC and later Fast EtherChannel supports CEF dCEF We recommend that you clear all explicit ip route cache distributed commands from the Fast Ethernet interfaces before enabling dCEF on the port channel interface Doing this gives the port channel interface proper control of its physical Fast Ethernet links When you enable CEF dCEF globally all interfaces that support CEF dCEF are enabled When CEF dCEF is enabled on the port channel interface it is automatically enabled on each of the Fast Ethernet interfaces in the channel group However if you have previously disabled CEF dCEF on the Fast Ethernet interface CEF dCEF is not automatically enabled In this case you must enable CEF dCEF on the Fast Ethernet interface Cisco 10S Interface Configuration Guide Configuri
48. oint to Point Protocol PPP Before you can configure the LAN Extender from the core router you must first enable PPP encapsulation on the serial interface to which the LAN Extender is connected Cisco 10S Interface Configuration Guide EZ _Configuring LAN Interfaces Configuring a LAN Extender Interface W Configuring the LAN Extender You configure the LAN Extender from the core router either a Cisco 4000 series or Cisco 7000 series router as if it were simply a network interface board The LAN Extender cannot be managed or configured from the remote Ethernet LAN or via a Telnet session To configure the LAN Extender you configure a logical LAN Extender interface on the core router and assign the MAC address from your LAN Extender to that interface Subsequently during the PPP negotiation on the serial line the LAN Extender sends its preconfigured MAC address to the core router The core router then searches for an available preconfigured LAN Extender interface seeking one to which you have already assigned that MAC address If the core router finds a match it binds or associates that LAN Extender interface to the serial line on which that MAC address was negotiated At this point the LAN Extender interface is created and is operational If the MAC address does not match one that is configured the connection request is rejected Figure 6 illustrates this binding process Figure 6 Binding a Serial Line to a LAN Extender
49. ommand Purpose Step1 hub ethernet number port end port Specifies the hub number and the hub port or range of hub ports and enters hub configuration mode Step2 no shutdown Enables the hub ports Disabling or Enabling Automatic Receiver Polarity Reversal Command On Ethernet hub ports only the hub ports can invert or correct the polarity of the received data if the port detects that the received data packet waveform polarity is reversed due to a wiring error This receive circuitry polarity correction allows the hub to repeat subsequent packets with correct polarity When enabled this function is executed once after reset of a link fail state Automatic receiver polarity reversal is enabled by default To disable this feature on a per port basis use the following command in hub configuration mode Purpose no auto polarity Disables automatic receiver polarity reversal To enable automatic receiver polarity reversal on a per port basis use the following command in hub configuration mode Command Purpose auto polarity Enables automatic receiver polarity reversal Disabling or Enabling the Link Test Function Command The link test function applies to Ethernet hub ports only The Ethernet ports implement the link test function as specified in the 802 3 10BASE T standard The hub ports will transmit link test pulses to any attached twisted pair device if the port has been inactive for mo
50. ou are managing which is a LAN Extender interface connected to an Ethernet network The virtual Ethernet connection the serial interface and LAN Extender has been removed from the figure and points A and B which in Figure 4 were separated by the virtual Ethernet connection are now adjacent All LAN Extender interface configuration tasks described in this chapter apply to the interface configuration shown in Figure 5 Figure 5 LAN Extender Interface Connected to an Ethernet Network Other gt Remote networks aaa LAN Core Router LEX A B Ethernet 2980 Installing a LAN Extender at a Remote Site To install a LAN Extender at a remote site refer to the Cisco 1000 Series Hardware Installation publication Discovering the MAC Address After the LAN Extender has been installed at the remote site you need to obtain its MAC address Each LAN Extender is preconfigured with a permanent burned in MAC address The address is assigned at the factory you cannot change it The MAC address is printed on the LAN Extender s packing box If necessary you can also display the MAC address with the debug ppp negotiation command The first three octets of the MAC address the vendor code are always the hexadecimal digits 00 00 0C Upgrading Software for the LAN Extender You can upgrade software for the LAN Extender on the host router with a TFTP server that is local to the host router The LAN Extender and core router communicate using the P
51. out milliseconds Sets the timeout timer in the PCM Controlling SMT Frame Processing You can disable and enable SMT frame processing for diagnostic purposes To do so use one of the following commands in interface configuration mode Command Purpose no fddi smt frames Disables SMT frame processing fddi smt frames Enables SMT frame processing Enabling Duplicate Address Checking You can enable the duplicate address detection capability on the FDDI If the FDDI finds a duplicate address it displays an error message and shuts down the interface To enable duplicate address checking use the following command in interface configuration mode Command Purpose fddi duplicate address check Enables duplicate address checking capability Setting the Bit Control You can set the FDDI bit control to control the information transmitted during the Connection Management CMT signaling phase To do so use the following command in interface configuration mode Command Purpose fddi cmt signal bits signal bits phy a phy b Sets the FDDI bit control Cisco IOS Interface Configuration Guide Configuring LAN Interfaces Configuring a Fiber Distributed Data Interface i Controlling the CMT Microcode Command You can control whether the CMT onboard functions are on or off The FIP provides CMT functions in microcode These functions are separate from those provided on the processor card and are acces
52. port adapter port configuration Cisco 7500 or interface vg anylan slot port Cisco 7200 Step2 ip address ip address mask Specifies the IP address and subnet mask to the interface Step3 frame type ethernet Configures the frame type Currently only Ethernet frames are supported The frame type defaults to Ethernet amp Note The port number for the 100VG AnyLAN port adapter is always 0 Configuring the PA 100VG interface is similar to configuring an Ethernet or Fast Ethernet interface To display information about the 100VG AnyLAN port adapter use the show interfaces vg anylan EXEC command Configuring Fast EtherChannel amp The Fast EtherChannel feature allows multiple Fast Ethernet point to point links to be bundled into one logical link to provide bidirectional bandwidth of up to 800 Mbps Fast EtherChannel builds on standards based 802 3 full duplex Fast Ethernet to provide fault tolerant high speed links between switches routers and servers This feature can be configured between Cisco 7500 series routers and Cisco 7000 series routers with the 7000 Series Route Switch Processor RSP7000 and 7000 Series Chassis Interface RSP7000CI or between a Cisco 7500 series router or a Cisco 7000 series router with the RSP7000 and RSP700CI and a Catalyst 5000 switch Note Using the Fast EtherChannel feature on a Catalyst 5000 switch requires a hardware upgrade Contact your local sales representative for upgrade detail
53. r Router Router Router config interface fastethernet 1 0 0 config if ip address 1 1 1 10 255 255 255 0 config if full duplex config if media type mii config if exit config exit PA 12E 2FE Port Configuration Examples The following is an example of a configuration for the PA 12E 2FE port adapter interface Bridge groups 10 20 and 30 use IEEE Spanning Tree Protocol The first four interfaces of a PA 12E 2EF port adapter in port adapter slot 3 use bridge groups 10 and 20 Each interface is assigned to a bridge group and the shutdown state is set to up The PA 12E 2FE port adapter supports store and forward or cut through switching technology between interfaces within the same bridge group store and forward is the default In the following example the cut through command is used to configure each interface for cut through switching of received and transmitted data Router configure terminal Enter configuration commands one per line End with CNTL Z Router config bridge 10 protocol ieee Router config bridge 20 protocol ieee Router config bridge 30 protocol ieee Router config interface fastethernet 3 0 Router config if bridge group 10 Router config if cut through Router config if no shutdown Router config if exit Router config SLINEPROTO 5 UPDOWN Line protocol on Interface Fast Ethernet3 0 changed state to up SLINK 3 UPDOWN Interface Fast Ethernet3 0 changed state to up
54. r of frames per token default 3 Specify 4 as the maximum number of frames to be transmitted per token 4700 config if fddi frames per token 4 Cisco IOS Interface Configuration Guide Configuring LAN Interfaces LAN Interface Configuration Examples W Hub Configuration Examples The following sections provide examples of hub configuration e Hub Port Startup Examples e Source Address for an Ethernet Hub Port Configuration Examples e Hub Port Shutdown Examples e SNMP Illegal Address Trap Enablement for Hub Port Example Hub Port Startup Examples The following example configures port 1 on hub 0 of Ethernet interface 0 hub ethernet 0 1 no shutdown The following example configures ports 1 through 8 on hub 0 of Ethernet interface 0 hub ethernet 0 1 8 no shutdown Source Address for an Ethernet Hub Port Configuration Examples The following example configures the hub to allow only packets from MAC address 1111 2222 3333 on port 2 of hub 0 hub ethernet 0 2 source address 1111 2222 3333 The following example configures the hub to remember the first MAC address received on port 2 and allow only packets from that learned MAC address hub ethernet 0 2 source address Hub Port Shutdown Examples The following example shuts down ports 3 through 5 on hub 0 hub ethernet 0 3 5 shutdown The following example shuts down port 3 on hub 0 hub ethernet 0 3 shutdown Cisco 10S Interface Configuration Guide Bi
55. r restore the squelch by using the second command Purpose squelch reduced Reduces the squelch squelch normal Returns squelch to normal Configuring Fast Ethernet 100BASE T Step 1 Step 2 Step 3 Step 4 Step 5 You must configure the Fast Ethernet 100BASE T interface on a Cisco AS5300 so that it can be recognized as a device on the Ethernet LAN The Fast Ethernet interface supports 10 and 100 Mbps speeds with the 1OOBASE T and 1OBASE T routers hubs and switches To configure the interface use the following commands beginning in privileged EXEC mode Command Purpose configure terminal Enters global configuration mode interface fastethernet number Enters Fast Ethernet interface configuration mode ip address address subnet mask Assigns an IP address and subnet mask to the interface speed 10 100 auto Assigns a speed to the interface The default is 100 Mbps For relationship between duplex and speed command options see Table 3 duplex full half auto Sets up the duplex configuration on the Fast Ethernet interface The default is half duplex For relationship between duplex and speed command options see Table 3 1 The auto option automatically negotiates the speed based on the speed and the peer router hub or switch media To use the auto negotiation capability that is to detect speed and duplex modes automatically you must set both speed and duplex to auto Setting the sp
56. re than 8 to 17 ms If a hub port does not receive any data packets or link test pulses for more than 65 to 132 ms and the link test function is enabled for that port that port enters link fail state and cannot transmit or receive The hub port is enabled again when it receives four consecutive link test pulses or a data packet The link test function is enabled by default To allow the hub to interoperate with 10BASE T twisted pair networks that do not implement the link test function the hub s link test receive function can be disabled on a per port basis To do so use the following command in hub configuration mode Purpose no link test Disables the link test function Cisco 10S Interface Configuration Guide E Configuring LAN Interfaces W Configuring a Hub Interface To enable the link test function on a hub port connected to an Ethernet interface use the following command in hub configuration mode Command Purpose link test Enables the link test function Enabling Source Address Control On an Ethernet hub port only you can configure a security measure such that the port accepts packets only from a specific MAC address For example suppose your workstation is connected to port 3 on a hub and source address control is enabled on port 3 Your workstation has access to the network because the hub accepts any packet from port 3 with your workstation s MAC address Any packets arriving with
57. required steps 1 Create a port channel interface and assign an IP address 2 Assign the Fast Ethernet interfaces up to four to the port channel interface For information on other configuration tasks for the Fast EtherChannel see the Configuring an Ethernet or Fast Ethernet Interface section For information on other commands that can be used by the Fast EtherChannel refer to the other configuration guides in the Cisco IOS documentation set Cisco 10S Interface Configuration Guide Configuring LAN Interfaces Configuring Fast EtherChannel W Configuring the Port Channel Interface Step 1 Step 2 Step 3 Step 4 Step 5 To configure the port channel interface use the following commands beginning in global configuration mode Command Purpose interface port channel channel number Creates the port channel interface and enters interface configuration mode The channel number can be to 4 ip address ip address mask Assigns an IP address and subnet mask to the Fast EtherChannel If you configure ISL you must assign the IP address to the subinterface for example interface port channel 1 1 an IP address per VLAN and you must specify the encapsulation with VLAN number under that subinterface for example encapsulation isl 100 mac address ieee address Optional Assigns a static MAC address to the Fast EtherChannel If you do not assign a static MAC address on the port cha
58. rnet Interface Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 To configure the interfaces on the PA 12E 2FE port adapter use the following commands in global configuration mode Command Purpose bridge bridge group protocol ieee Specifies the type of Spanning Tree Protocol The PA 12E 2FE port adapter supports DEC and IEEE Spanning Tree Protocols however we recommend using the IEEE protocol when configuring bridge groups interface fastethernet slot port ports 0 and 1 interface ethernet slot port ports 2 through 13 Enters the interface you want to configure bridge group bridge group Assigns a bridge group to the interface cut through receive transmit Optional Configures the interface for cut through switching technology The default is store and forward that is no cut through full duplex Optional Configures the transmission mode for full duplex if an attached device does not support autosensing or autonegotiation The default is half duplex no shutdown Restarts the interface exit Returns to configuration mode Repeat Steps 1 through 7 for each interface copy system running config nvram startup config Saves the new configuration to memory To enable integrated routing and bridging on the bridge groups use the following command
59. s Fast EtherChannel provides higher bidirectional bandwidth redundancy and load sharing Up to four Fast Ethernet interfaces can be bundled in a port channel and the router or switch can support up to four port channels The Fast EtherChannel feature is capable of load balancing traffic across the Fast Ethernet Cisco 10S Interface Configuration Guide Configuring LAN Interfaces WE Configuring Fast EtherChannel links Unicast broadcast and multicast traffic is distributed across the links providing higher performance and redundant parallel paths In the event of a link failure traffic is redirected to remaining links within the Fast EtherChannel without user intervention In this release of the Fast EtherChannel feature IP traffic is distributed over the port channel interface while traffic from other routing protocols is sent over a single link Bridged traffic is distributed based on the Layer 3 information in the packet If the Layer 3 information does not exist in the packet the traffic is sent over the first link Fast EtherChannel supports all features currently supported on the Fast Ethernet interface You must configure these features on the port channel interface rather than on the individual Fast Ethernet interfaces Fast EtherChannel connections are fully compatible with Cisco IOS virtual LAN VLAN and routing technologies The Inter Switch Link ISL VLAN trunking protocol can carry multiple VLANs across a Fast
60. s beginning in global configuration mode Command Purpose bridge irb Enables integrated routing and bridging interface bvi bridge group Enables a virtual interface on a bridge group ip address address mask Assigns an IP address and subnet mask to the bridge group virtual interface no shutdown Restarts the interface exit Returns to configuration mode Repeat Steps 1 through 5 for each bridge group bridge bridge group route protocol Specifies the protocol for each bridge group exit Exits configuration mode copy system running config nvram startup config Saves the new configuration to memory Cisco IOS Interface Configuration Guide Configuring LAN Interfaces Configuring an Ethernet or Fast Ethernet Interface W Monitoring and Maintaining the PA 12E 2FE Port Adapter After configuring the new interface you can display its status and verify other information To display information about the PA 12E 2FE port adapter use the following commands in EXEC mode Command Purpose show version Displays the configuration of the system hardware the software version the names and sources of configuration files and the boot image show controllers Displays all current port adapters and their interfaces show interface fastethernet slot port ports 0 and 1 or show interface ethernet slot port ports 2 through 13 Displays
61. s the core router sends a command to the LAN Extender before giving up Cisco IOS Interface Configuration Guide Configuring LAN Interfaces Configuring a LAN Extender Interface W Shutting Down and Restarting the LAN Extender s Ethernet Interface From the core router you can shut down the LAN Extender s Ethernet interface This stops traffic on the remote Ethernet LAN from reaching the core router but leaves the LAN Extender interface that you created intact Note There are no commands that allow you to shut down the serial interface on the LAN Extender To shut down the LAN Extender s Ethernet interface use the following command in interface configuration mode Command Purpose shutdown Shuts down the LAN Extender s Ethernet interface To restart the LAN Extender s Ethernet interface use the following command in interface configuration mode Command Purpose no shutdown Restarts the LAN Extender s Ethernet interface Restarting the LAN Extender To reboot the LAN Extender and reload the software use one of the following commands in privileged EXEC mode Command Purpose clear controller lex number prom Halts operation of the LAN Extender and initiates a cold restart clear controller lex slot port prom Halts operation of the LAN Extender on a Cisco 7000 series routers Downloading a Software Image to the LAN Extender When the LAN Extender is powered o
62. sable and bring up enable PA 12E 2FE interfaces e View the bridge group status of each PA 12E 2FE interface Cisco 10S Interface Configuration Guide Configuring LAN Interfaces WE Configuring an Ethernet or Fast Ethernet Interface You can access the 12E 2FE VLAN Configuration WebTool from your router s home page For complete procedures on how to use the VLAN Configuration WebTool refer to the PA 12E 2FE Ethernet Switch Port Adapter book that accompanies the hardware Figure 2 Example Home Page for a Cisco 7200 Series Router Cisco 7206 Shown Netscape corenm7206 3 Home Page File Edit View Go Bookmarks Options Directory Window Help ej A 2 Q 9 Back Forward Home Edit Reload Images Location Jhttp corenm 206 3 Open j What s New What s Cool Destinations Net Search People Software Cisco Systems Accessing Cisco 7206 corenm7206 3 Telnet to the router Show interfaces display the status of the interfaces Show diagnostic log display the diagnostic log Monitor the router HTML access to the command line interface Connectivity test ping the nameserver Platform platform utilities Send comments to cs html below VLAN Configuration WebTool Send comments to cs html below Show tech support display information commonly needed by tech support Help resources 1 CCO at www cisco com Cisco Con
63. sed through EXEC commands The default is for the FIP CMT functions to be on A typical reason to disable is when you work with new FDDI equipment and have problems bringing up the ring If you disable the CMT microcode the following actions occur e The FIP CMT microcode is disabled e The main system code performs the CMT function while debugging output is generated To disable the CMT microcode use the following command in interface configuration mode Purpose no fddi if cmt Disables the FCIT CMT functions Starting and Stopping FDDI In normal operation the FDDI interface is operational once the interface is connected and configured You can start and stop the processes that perform the CMT function and allow the ring on one fiber to be stopped To do so use either of the following commands in EXEC mode Command Purpose emt connect interface name phy a phy b Starts CMT processes on FDDI ring emt disconnect interface name phy a phy b Stops CMT processes on FDDI ring Do not use either of the preceding commands during normal operation of FDDI they are used during interoperability tests Setting FDDI Frames Per Token Limit The FDDI interface is able to transmit multiple frames per token on a Cisco 4000 Cisco 4500 and a Cisco 4700 series routers instead of only a single frame at a time You can specify the maximum number of frames to be transmitted with each token capture This significant
64. st Ethernet interface and enters interface configuration mode on the Cisco 7200 series routers interface fastethernet slot port adapter port Specifies a Fast Ethernet interface and enters interface configuration mode on the Cisco 7500 series routers Use the show interfaces fastethernet command to display the Fast Ethernet slots and ports The Fast Ethernet NIM and the FEIP default to half duplex mode Specifying an Ethernet Encapsulation Method Currently there are three common Ethernet encapsulation methods e The standard ARPA Ethernet Version 2 0 encapsulation which uses a 16 bit protocol type code the default encapsulation method e SAP IEEE 802 3 encapsulation in which the type code becomes the frame length for the IEEE 802 2 LLC encapsulation destination and source Service Access Points and a control byte e The SNAP method as specified in RFC 1042 Standard for the Transmission of IP Datagrams Over IEEE 802 Networks which allows Ethernet protocols to run on IEEE 802 2 media The encapsulation method you use depends upon the routing protocol you are using the type of Ethernet media connected to the router or access server and the routing or bridging application you configure Establish Ethernet encapsulation of IP packets by using one of the following commands in interface configuration mode Command Purpose encapsulation arpa Selects ARPA Ethernet encapsulation encapsulation sap
65. t the CMT information in the output Phy A state is active neighbor is B cmt signal bits 08 20C status ALS Phy B state is active neighbor is A cmt signal bits 20C 08 status ILS CFM is thru A token rotation 5000 usec ring operational 0 01 42 Upstream neighbor 0800 2008 C52E downstream neighbor 0800 2008 C52E The show interfaces fddi example shows that Physical A Phy A completed CMT with its neighbor The state is active and the display indicates a Physical B type neighbor The sample output indicates CMT signal bits 08 20C for Phy A The transmit signal bits are 08 Looking at the PCM state machine 08 indicates that the port type is A the port compatibility is set and the LCT duration requested is short The receive signal bits are 20C which indicate the neighbor type is B port compatibility is set there is a MAC on the port output and so on The neighbor is determined from the received signal bits as follows Bit Positions 98 76543210 Value Received 10000031100 Interpreting the bits in the diagram above the received value equals 0x20C Bit positions 1 and 2 0 1 indicate a Physical B type connection The transition states displayed indicate that the CMT process is running and actively trying to establish a connection to the remote physical connection The CMT process requires state transition with different signals being transmitted and received before moving on to the state ahead as indicated in the PCM stat
66. the function from the core router This process also saves bandwidth on the WAN because only the desired packets are forwarded from the LAN Extender to the core router Whenever possible you should perform packet filtering on the LAN Extender Figure 7 Packet Filtering on the LAN Extender Remote Other networks es Packet flow a LAN Ethernet Core router LAN Extender Packet filters A Filters applied by lex input address list and lex a input type list commands D You can also define filters on the core router to control which packets from the LAN Extender interface are permitted to pass to other interfaces on the core router see Figure 8 You do this using the standard filters available on the router This means that all packets are sent across the WAN before being filtered and that the filtering is done using the core router s CPU Figure 8 Packet Filtering on the Core Router Filters applied by standard router input filters y LEX Input packet filters uas Packet flow Core router LEX Output packet filters LAN Extender Filters applied by standard router output filters 2982 Cisco 10S Interface Configuration Guide B ics Configuring LAN Interfaces WE Configuring a LAN Extender Interface Note The major reason to create access lists on a LAN Extender interface is to prevent traffic that is local to the remote Ethernet LAN from traversing the WAN and reaching the core router You can
67. the interfaces so you can verify that they have the correct slot number and that the interface and line protocol are in the correct state show bridge group Displays all bridge groups and their interfaces show interface ethernet slot port irb ports 2 through 13 or show interface fastethernet slot port irb ports 0 and 1 Displays the routed protocol so you can verify that it is configured correctly for each interface show protocols Displays the protocols configured for the entire system and specific interfaces show pas eswitch addresses fastethernet Slot port ports 0 and 1 or show pas eswitch addresses ethernet slot port ports 2 through 13 Displays the Layer 2 learned addresses for each interface more system running config Displays the running configuration file more nvram startup config Displays the configuration stored in NVRAM Configuring Bridge Groups Using the 12E 2FE VLAN Configuration WebTool The 12E 2FE VLAN Configuration WebTool shown in Figure 2 is a web browser based Java applet that displays configured interfaces and bridge groups for PA 12E 2FE port adapters installed in Cisco routers With the WebTool you can perform the following tasks e Create and delete bridge groups also referred to as VLANs e Add and remove PA 12E 2FE interfaces from bridge groups e Assign colors to bridge groups and PA 12E 2FE interfaces e Administratively shut down di
68. thernet interface from a Fast EtherChannel use the following commands beginning in global configuration mode Command Purpose Step1 interface fastethernet Specifies the Fast Ethernet interface and enters interface configuration mode slot port adapter port Step2 no channel group Removes the Fast Ethernet interface from the channel group Step3 end Optional Enables other supported interface commands to execute and exits when they have finished The Cisco IOS software automatically removes a Fast Ethernet interface from the Fast EtherChannel if the interface goes down and the software automatically adds the Fast Ethernet interface to the Fast EtherChannel when the interface is back up Currently Fast EtherChannel relies on keepalives to detect whether the line protocol is up or down Keepalives are enabled by default on the Fast Ethernet interfaces If the line protocol on the interface goes down because it did not receive a keepalive signal the Fast EtherChannel detects that the line protocol is down and removes the interface from the Fast EtherChannel However if the line protocol remains up because keepalives are disabled on the Fast Ethernet interface the Fast EtherChannel cannot detect this link failure other than a cable disconnect and does not remove the interface from the Fast Cisco IOS Interface Configuration Guide Configuring LAN Interfaces Configuring a Fiber Distributed Data Interface W EtherCha
69. to your LAN Extender LED Condition Meaning ISDN Bland Flicker The serial line is transmitting and receiving packets ISDN B2 normally Blinking A line fault has been detected The LEDs will go on for several seconds and then they will blink a certain number of times to indicate a particular error The LEDs will blink at a rate of one to two blinks per second The following are the errors that can be encountered 1 blink The serial line is down 2 blinks No clock signal was received 3 blinks An excessive number of cyclic redundancy check CRC errors has been received 4 blinks The line is noisy 5 blinks A loopback condition has occurred 6 blinks The PPP link has failed Contact your system administrator LAN TX and Flicker The Ethernet LAN connection is transmitting and receiving LAN RX data normally COLLISION Detects data collisions LINK OK Steady Indicates that the serial link is up and functioning For more complete network troubleshooting information refer to the Troubleshooting Internetworking Systems publication Cisco 10S Interface Configuration Guide B ics Configuring LAN Interfaces W Configuring a Token Ring Interface Configuring a Token Ring Interface Cisco supports various Token Ring interfaces Refer to the Cisco Product Catalog for information about platform and hardware compatibility The Token Ring interface supports both routing Layer 3 swit
70. try Cisco 10S Interface Configuration Guide Bic Configuring LAN Interfaces Hi LAN Interface Configuration Examples Cisco 10S Interface Configuration Guide
71. ulation places the FIP into encapsulation mode when doing bridging In transparent mode the FIP interoperates with earlier versions of encapsulating interfaces when performing bridging functions on the same ring When using the FIP you can specify the encapsulation method by using the following command in interface configuration mode Purpose fddi encapsulate Specifies the encapsulation method for the FIP amp When you are doing translational bridging use routing for routable protocols and use translational bridging for the rest such as LAT Note Bridging between dissimilar media presents several problems that can prevent communications These problems include bit order translation using MAC addresses as data maximum transfer unit MTU differences frame status differences and multicast address usage Some or all of these problems might be present in a multimedia bridged LAN and might prevent communication These problems are most prevalent in networks that bridge between Token Rings and Ethernet networks or between Token Rings and FDDI because of the different ways Token Ring is implemented by the end nodes We are currently aware of problems with the following protocols when bridged between Token Ring and other media AppleTalk DECnet IP Novell IPX Phase IV VINES and XNS Further the following protocols might have problems when bridged between FDDI and other media Novell IPX and XNS We recommend that t

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