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Avaya Configuring SDLC Services User's Manual

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1. oO i o El IL z SDLC E H 3174 Front end processer Tog li 2 3174 SDLC LLC2 sets ee eae 46s Le ee b Dual switch DLSw network z E 3174 DL Tog Host muc emn Ii 3174 m SDLC o E o TAY e IP E backbone O 3174 m Front end processer E i i 3174 SDLC TCP IP LLC2 4 ee 4 ee DSW0024A Figure 1 2 Secondary SDLC Routers in a Single and b Dual Switch DLSw Networks 303540 A Rev 00 1 5 Configuring SDLC Services Secondary SDLC Limitations Bay Networks routers configured as secondary SDLC link stations function as PU 2 0 devices only Secondary SDLC Configuration The DLSw Mode parameter allows you to configure primary or secondary operations on DLSw interfaces and SDLC local devices Refer to Configuring DLSw Services for information on the DLSw Mode parameter Enhanced Synchronous Pass Through Using primary and secondary SDLC s
2. routers El sj c E 8174 Host um Ne LLL c L Z 3174 Front end Sharing processer E unit 3174 z 3174 LLC2 SDLC K E ooo see EE b Dual switch DLSw network 4 SDLC primary 91 4 ost router e i s c IP E 5 mum LH backbone Z 3174 Front end Sharing processer E unit 3174 3174 LLC2 TCP IP SDLC 4 eecl02 2 4je 2 SDL0003A Figure 1 1 Primary SDLC Routers in a Single and b Dual Switch DLSw Networks 303540 A Rev 00 1 3 Configuring SDLC Services Secondary SDLC Support A Bay Networks router acting as a secondary device on an SDLC link can Support a single SDLC link communicating to a front end processor FEP or similar SNA device Serve as a secondary PU 2 0 device on that link Coexist with other secondary SDLC devices PU 2 0 or PU 2 1 on the same SDLC link Allow SNA devices attached to multiple remote routers to share a single SDLC link to the FEP Attach to the FEP directly using a null modem cable or via a leased line Figure 1 2 illustrates DLSw single and dual switch networks where Bay Networks routers serve as secondary SDLC nodes 303540 A Rev 00 Synchronous Data Link Control Overview a Single switch DLSw network SDLC secondary routers EO T 3174 Host m diam tol f 3174 I io
3. 303540 A Rev 00 A acronyms xiii adding SDLC link stations 4 15 address field in SDLC frames 1 8 APPN link station types allowed 2 1 using with SDLC 1 9 BOFL Breath of Life parameter 2 2 C Cable Type parameter 3 5 Clock Source parameter 3 3 configuring SDLC link stations 4 15 connections physical 1 8 control field in SDLC frames 1 8 conventions text xi D defaults for SDLC parameters A 1 to A 4 deleting SDLC from the node 4 28 SDLC interfaces 4 15 DISC Retransmit Retry Limit parameter 4 27 DISC Retransmit Timer parameter 4 27 DLSw link station types allowed 2 1 using with SDLC 1 10 303540 A Rev 00 Index E editing SDLC global parameters 4 3 to 4 4 interface parameters 4 4 to 4 14 link station parameters 4 18 to 4 28 educational services xv Enable parameter 4 4 4 6 4 19 Enable Reject Frame parameter 4 12 Enable Stats Collection parameter 4 14 enabling SDLC 3 1 to 3 5 exchange identification XID 1 2 4 7 F Fast Contact Retry Limit parameter 4 26 Fast Contact Timer parameter 4 26 Fast Poll Count Limit parameter 4 23 Fast Poll Timer parameter 4 23 flag field in SDLC frames 1 8 formats for SDLC frames 1 8 frame formats 1 8 frame checking field in SDLC frames 1 8 full duplex transmission 1 8 configuring 4 11 G Group Address parameter 4 20 H half duplex transmission 1 8 configuring 4 11 Index 1 Idle Line Retry
4. For example if you are using a line with a 4800 baud rate increase the REPLY TO Timer parameter value in the SDLC Link Station Configuration window refer to Figure 4 4 to 60 tenths of a second Edit the REPLYTO Timer value whenever you adjust baud rate with the Internal Clock Speed parameter or the external modem baud rate Configurable Window Size In SDLC a window controls how many frames a link station sends before receiving an acknowledgment Window size depends on which modulo your network s implementation of SDLC uses Modulo 8 operation allows a maximum window size of 7 Modulo 128 a maximum of 127 For example with a window size of 7 a link station can transmit frames 0 through 6 before requiring acknowledgment from the receiving station The sending station will not send more frames until it receives an acknowledgment You edit this window size with the MAXOUT parameter described in Chapter 4 2 2 303540 A Rev 00 Chapter 3 Enabling SDLC Services This chapter describes how to enable SDLC services It assumes you have read Configuring and Managing Routers with Site Manager and 1 Opened a configuration file 2 Specified router hardware if this is a local mode configuration file 3 Selected the connector on which you are enabling SDLC labeled either COMI COM2 or MCTI When you enable SDLC services you are required to specify only a few parameters The Configuration Manager supplies default values for
5. Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Group Address 0 for APPN None for DLSw 0 through 254 Specifies the address of the group to which this link station belongs for secondary link stations only If the link station is not part of a group as is the case in a point to point topology accept the default If the link station is part of a group enter its group poll address 1 3 6 1 4 1 18 3 5 1 7 5 1 5 MAXDATA PDU2057 PDU265 PDU521 PDU1033 PDU2057 Specifies the maximum frame size SDLC supports This value includes the transmission header TH and request header RH Enter a maximum frame size equal to or larger than the largest frame size the station will receive 1 3 6 1 4 1 18 3 5 1 7 5 1 7 MAXOUT 7 through 127 Controls the maximum number of consecutive frames that an SDLC link station can send without acknowledgment Enter a value from 1 through 127 1 3 6 1 4 1 18 3 5 1 7 5 1 10 4 20 303540 A Rev 00 Editing SDLC Parameters Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID MAXIN 7 through 127 Controls the maximum number of unacknowledged frames that an S
6. Configuring SDLC Services BayRS Version 13 00 Site Manager Software Version 7 00 Part No 303540 A Rev 00 October 1998 CES Bay Networks Where Information Flows Bay Networks Where Information Flows 4401 Great America Parkway 8 Federal Street Santa Clara CA 95054 Billerica MA 01821 Copyright 1998 Bay Networks Inc All rights reserved Printed in the USA October 1998 The information in this document is subject to change without notice The statements configurations technical data and recommendations in this document are believed to be accurate and reliable but are presented without express or implied warranty Users must take full responsibility for their applications of any products specified in this document The information in this document is proprietary to Bay Networks Inc The software described in this document is furnished under a license agreement and may only be used in accordance with the terms of that license A summary of the Software License is included in this document Trademarks ACE AFN AN BCN BLN BN BNX CN FRE LN Optivity PPX Quick2Config and Bay Networks are registered trademarks and Advanced Remote Node ANH ARN ASN BayRS BaySecure BayStack BayStream BCC BCNX BLNX EZ Install EZ Internetwork EZ LAN FN IP AutoLearn PathMan RouterMan SN SPEX Switch Node System 5000 and the Bay Networks logo are trademarks of Bay Networks Inc Microsoft MS MS DOS Win32
7. 1 6 Enhanced Synchronous Pass Through cisions iaaiiai uan cube ane kk Ro da ci cdd 1 6 TUBING US I aI MISS m na a INE 1 8 SOLS Suppart Dvar METI LINKS Locus restera d i ar ara E Ru E e Fried go bra 1 8 gie Eg d rm a a N Feme PAME Ed 1 8 Using APPN Services wiih SDLC uae aite Ukt vc a a rt kk aaa a DX uL UAR 1 9 Using DLSw Services with SDLC ihn seu estos operc T seas TEE For More Intermatiogm about SDLG sirsenis rinas aA EN rt ccce E 1 10 303540 A Rev 00 V Chapter 2 SDLC Implementation Notes NI Scrip I Sm 2 1 Seve PCr ene Lipe PHISITIBIBES arriera dede avem RISE Vnd S adi PERRA Gant 2 1 SCA TANS mu TTE T TP ES iba ns MN 2 2 Conigurabie Window rr Meu 2 2 Chapter 3 Enabling SDLC Services Enabling SDLC on an niera Me 3 1 SDLC Lipe Parameter Desorplgiis x torneo vem ide auc garda rure NER TIU acta 3 3 Chapter 4 Editing SDLC Parameters Using the Parameter Desc EI saecu a aerae pete a een ax semenasenas anaes 4 1 Accessing SDLG PAAmMOTOTS auiusscacubcvazneiioa ando Seddulibe 2An IUE raa a IUUD pa A IE DEP Edd Asa co ix 4 2 Editing SDLG Global Parameters i2 tees caedi e rassegna acd Mn cain aad aS ML V Fac Gaga 4 3 Editing SDLG interlace Parameters sepe Gegen RU DAY EE Rd HL rapa ge Sa 4 4 SDLC Interface Parameter Descriptions icceccesisccnrersinponneeeisncenneessncteneessanenterasncense 4 08 Deleting an SDLG Merate T 4 15 Ad
8. 1 through 64000 where 1 causes the switch to the Slow Contact Timer after the first Fast Contact Timer expires Enter 64000 for an infinite number of retries 1 3 6 1 4 1 18 3 5 1 7 5 1 17 Slow Contact Timer 4000 milliseconds 1 through 64000 Allows contact polling to continue using this timer when the Fast Contact Retry Limit expires This prevents leased multidrop links from being overwhelmed by poll frames for absent stations This parameter operates with the Slow Contact Retry Limit parameter Enter a value from 1 through 64000 1 3 6 1 4 1 18 3 5 1 7 5 1 18 4 26 303540 A Rev 00 Editing SDLC Parameters Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Slow Contact Retry Limit 8 1 through 65535 Controls the number of times to transmit a contact frame for example SNRM before sending an outage message to the SDLC device This parameter operates with the Slow Contact Timer parameter Enter a value from 1 through 65535 where 1 causes an outage after the first Slow Contact Timer expires and 65535 specifies an unlimited number of retries 1 3 6 1 4 1 18 3 5 1 7 5 1 19 DISC Retransmit Timer 4000 milliseconds 1 through 64000 Controls the length of time before retransmitting an unacknowledged Disconnect DISC command This
9. 19 2 Kb sec while V 35 interfaces can operate at speeds up to 64 Kb sec Frame Format SDLC sends and receives three types of frames e Supervisory frames transmit ready or busy status control polling and request retransmission when an error occurs or when frames arrive out of sequence Information frames transmit data e Unnumbered frames control initialization and status reporting 1 8 303540 A Rev 00 Synchronous Data Link Control Overview Figure 1 4 illustrates the format of SDLC frames Information Frame Flag Address field Control field field checking field Flag Figure 1 4 SDLC Frame Format Each frame begins with a one byte flag that alerts the receiver to the frame s presence The address field is a one byte field that identifies the secondary link station that communicates with the primary link station In a poll the Address field identifies the station being polled In a response this field identifies the transmitting secondary station The control field is one or two bytes long and identifies the function of the frame This field defines the frame format supervisory information or unnumbered The optional information field is a variable length field the length must be a multiple of eight bits A two byte frame checking field lets the receiving station check the received frame for errors A one byte flag ends the frame Using APPN Services with SDLC You
10. 6 1 4 1 18 3 4 5 1 88 Cable Type RS232 Null RS232 RS422 v35 X21 Specifies the cable interface to the network Click on Values and select the installed cable interface type 1 3 6 1 4 1 18 3 4 5 1 83 RTS Enable Disable Enable Disable Controls the toggling of the Request to Send RTS signal on the interface Click on Values and select Enable or Disable For manual dial modems 2 wire set this parameter to Enable For leased modems 4 wire set this parameter to Disable 1 3 6 1 4 1 18 3 4 5 1 16 303540 A Rev 00 3 5 Using the Chapter 4 Editing SDLC Parameters Use the Configuration Manager to access configure and edit SDLC e Global parameters Interface parameters e Link station parameters To edit SDLC parameters you need to configure one SDLC interface If you have not yet configured an SDLC interface refer to Chapter 3 You may want to customize parameters for DLSw or APPN as well since they use SDLC services on the router For information on DLSw refer to Configuring DLSw Services for APPN refer to Configuring APPN Services Parameter Descriptions For each SDLC parameter this chapter provides the following information e Default setting parameter value that the system software sets APPN and DLSw configurations may affect some SDLC default settings during operation e All valid options e Function Instructions for setting the parameter value e Management information b
11. Configuration Manager window refer to Figure 4 1 select Protocols gt SDLC gt Link Stations The SDLC Link Station Configuration window appears refer to Figure 4 4 Select the address of the link station Edit the link station parameter values For information refer to the parameter descriptions in the next section Click on Apply to save your changes Click on Done to exit 4 18 303540 A Rev 00 Editing SDLC Parameters SDLC Link Station Parameter Descriptions Use the following descriptions as guidelines when you configure the parameters in the SDLC Link Station Configuration window Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Enable Enable Enable Disable Enables or disables the link station on the port Enter Enable to enable the link station on the port otherwise enter Disable 1 3 6 1 4 1 18 3 5 1 7 5 1 2 PU Name APPN link station name or the NAME portion of the NETID NAME DLSw adjacent link station name Any valid 8 byte ASCII name Specifies the physical unit PU name of the adjacent link station This name uniquely identifies the adjacent link station for statistics and Alert messages Enter the 8 byte ASCII link station name 1 3 6 1 4 1 18 3 5 1 7 5 1 32 303540 A Rev 00 4 19 Configuring SDLC Services Parameter Default Range Function
12. Windows and Windows NT are registered trademarks of Microsoft Corporation All other trademarks and registered trademarks are the property of their respective owners Restricted Rights Legend Use duplication or disclosure by the United States Government is subject to restrictions as set forth in subparagraph c 1 i1 of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 Notwithstanding any other license agreement that may pertain to or accompany the delivery of this computer software the rights of the United States Government regarding its use reproduction and disclosure are as set forth in the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 Statement of Conditions In the interest of improving internal design operational function and or reliability Bay Networks Inc reserves the right to make changes to the products described in this document without notice Bay Networks Inc does not assume any liability that may occur due to the use or application of the product s or circuit layout s described herein Portions of the code in this software product may be Copyright O 1988 Regents of the University of California AII rights reserved Redistribution and use in source and binary forms of such portions are permitted provided that the above copyright notice and this paragraph are duplicated in all such forms and that any documentation advertising materials and other material
13. derivative works from the Software or user manuals or any copy in whole or in part Except as expressly provided in this Agreement Licensee may not copy or transfer the Software or user manuals in whole or in part The Software and user manuals embody Bay Networks and its licensors confidential and proprietary intellectual property Licensee shall not sublicense assign or otherwise disclose to any third party the Software or any information about the operation design performance or implementation of the Software and user manuals that is confidential to Bay Networks and its licensors however Licensee may grant permission to its consultants subcontractors and agents to use the Software at Licensee s facility provided they have agreed to use the Software only in accordance with the terms of this license 3 Limited warranty Bay Networks warrants each item of Software as delivered by Bay Networks and properly installed and operated on Bay Networks hardware or other equipment it is originally licensed for to function substantially as described in its accompanying user manual during its warranty period which begins on the date Software is first shipped to Licensee If any item of Software fails to so function during its warranty period as the sole remedy Bay Networks will at its discretion provide a suitable fix patch or workaround for the problem that may be included in a future Software release Bay Networks further warrants to Licensee th
14. for command keywords and arguments Enter only one of the choices Do not type the vertical line when entering the command Example If the command syntax is show ip alerts routes you enter either show ip alerts or show ip routes but not both Access Node Advanced Peer to Peer Communications Advanced Peer to Peer Networking Access Stack Node Control Point Data Link Switching front end processor Institute of Electrical and Electronic Engineers local area network logical link control Media Access Control Multichannel T1 Network Basic Input Output System non return to zero non return to zero inverted protocol data unit physical unit Request for Comments 303540 A Rev 00 xiii Configuring SDLC Services SAP service access point SDLC Synchronous Data Link Control SNA Systems Network Architecture IBM XID exchange identification Bay Networks Technical Publications You can now print Bay Networks technical manuals and release notes free directly from the Internet Go to support baynetworks com library tpubs Find the Bay Networks product for which you need documentation Then locate the specific category and model or version for your hardware or software product Using Adobe Acrobat Reader you can open the manuals and release notes search for the sections you need and print them on most standard printers You can download Acrobat Reader free from the Adobe Systems Web site www adobe com You
15. parameter operates with the DISC Retransmit Retry Limit parameter for primary SDLC link stations only Enter a value from 1 through 64000 1 3 6 1 4 1 18 3 5 1 7 5 1 20 DISC Retransmit Retry Limit 4 1 through 65535 Controls the number of times to transmit a Disconnect DISC command This parameter operates with the DISC Retransmit Timer parameter Enter a value from 1 through 65535 where 1 causes an outage after the first DISC Retransmit Timer expires and 65535 specifies an unlimited number of retries 1 3 6 1 4 1 18 3 5 1 7 5 1 21 303540 A Rev 00 4 27 Configuring SDLC Services Parameter Poll Bit Set In I Frame Default TRUE Options TRUE FALSE Function Specifies whether this link station sends the poll bit on an Information frame Certain SDLC implementations do not handle receipt of I frames carrying the poll bit Instructions Enter TRUE if this link station can send the poll bit on an Information frame MIB Object ID 1 3 6 1 4 1 18 3 5 1 7 5 1 31 Deleting SDLC from the Router To delete all SDLC interfaces from the router begin at the Configuration Manager window refer to Figure 4 1 and complete the following steps 1 Select Protocols SDLC Delete SDLC 2 Click on OK in the confirmation window Site Manager deletes the SDLC interfaces from the router 4 28 303540 A Rev 00 Appendix A SDLC Default Parameter Settings Tables A 1 through A 3 give the default settings for
16. see 4 17 303540 A Rev 00 vii Tables Table A 1 SDLG Line Parameters estre rot tn E ortu eo xke torpet pida ER EE A 1 Table A 2 SDLC Interface Parameters AC2 Table A 3 SDLG Link Staton Parameters 2e ire dec actp esiti paci o eeu accede usse cds A 3 303540 A Rev 00 ix Preface This guide describes Synchronous Data Link Control SDLC services and what you do to start and customize SDLC services on a Bay Networks router Before You Begin Before using this guide you must complete the following procedures e Open a configuration file e Specify the router hardware if this is a local mode configuration file e Select the connector on which you are enabling SDLC Refer to Configuring and Managing Routers with Site Manager for instructions Text Conventions This guide uses the following text conventions angle brackets lt gt bold text Indicate that you choose the text to enter based on the description inside the brackets Do not type the brackets when entering the command Example If the command syntax is ping ip address you enter ping 192 32 10 12 Indicates text that you need to enter and command names and options Example Enter show ip alerts routes Example Use the dinfo command 303540 A Rev 00 xi Configuring SDLC Services braces brackets ellipsis points italic text Screen text Indicate required elements in syntax descri
17. 303540 A Rev 00 Editing SDLC Parameters Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Link Connection Retry Limit 10 1 through 65535 Specifies the number of times the link has been tested for a connection before it fails the pending Activate Port Request The maximum value for this parameter specifies an infinite number of times This parameter operates with the Link Connection Timer parameter Accept the default This parameter is reserved for future enhancements 1 3 6 1 4 1 18 3 5 1 7 2 1 17 Primary Full Duplex FALSE TRUE FALSE Specifies whether the primary SDLC link station supports full duplex data transmission Enter TRUE if the primary SDLC station supports full duplex data transmission Enter FALSE if the primary station supports half duplex transmission 1 3 6 1 4 1 18 3 5 1 7 2 1 18 Secondary Full Duplex FALSE TRUE FALSE Specifies whether the secondary SDLC link station supports full duplex data transmission Enter TRUE if the secondary SDLC station supports full duplex data transmission Enter FALSE if the secondary station supports half duplex transmission 1 3 6 1 4 1 18 3 5 1 7 2 1 19 303540 A Rev 00 Configuring SDLC Services Parameter Default Options Function Instructions MIB
18. 8 8 continued 303540 A Rev 00 SDLC Default Parameter Settings Table A 2 SDLC Interface Parameters continued Default Setting Default Setting Parameter with APPN with DLSw Receive Buffer Pool Size 7 7 Initial Flow Control Credit 7 7 Enable Stats Collection True True Table A 3 SDLC Link Station Parameters Default Setting Default Setting Parameter with APPN with DLSw Enable Enable Enable PU Name Configured APPN Configured DLSw Link Station Name or Adjacent Link Station NAME portion of the Name APPN NETID NAME Group Address 0 None MAXDATA PDU2057 PDU2057 MAXOUT 7 7 MAXIN 7 7 Response Timer 400 ms None RNR Timer 3 min 3 min RNR Retry Limit 4 4 303540 A Rev 00 REPLYTO Timer 30 tenths of a 30 tenths of a second second REPLYTO Retry Limit 10 10 Fast Poll Timer 400 ms 400 ms Fast Poll Count Limit 16 16 continued A 3 Configuring SDLC Services Table A 3 SDLC Link Station Parameters continued Default Setting Default Setting Parameter with APPN with DLSw Slow Poll Timer 1000 ms 1000 ms Slow Poll Count Limit 65535 65535 Pre Activation Contact Frame XID XID Fast Contact Timer 4000 ms 4000 ms Fast Contact Retry Limit 4 4 Slow Contact Timer 4000 ms 4000 ms Slow Contact Retry Limit 8 8 DISC Retransmit Timer 4000 ms 4000 ms DISC Retransmit Retry Limit 4 4 Poll Bit Set In I Frame True True
19. AXIN 7 Figure 4 4 SDLC Link Station Configuration Window 2 Click on Add A window prompts you for the address of the link station Figure 4 5 4 16 303540 A Rev 00 Editing SDLC Parameters Link Station Address hex Figure 4 5 Link Station Configuration Window 3 Enter the link station address Refer to the parameter description that follows this procedure 4 Click on OK to save your changes and exit the window The SDLC Link Station Configuration window reappears refer to Figure 4 4 with the new entry added to the list of existing link stations Complete the procedure in the next section Editing SDLC Link Station Parameters to define the configuration information for the link station you just added Note If you are using SDLC with DLSw you must configure a local device for each SDLC link station you add For information refer to Configuring DLSw Services 303540 A Rev 00 4 17 Configuring SDLC Services Parameter Default Options Function Instructions MIB Object ID Link Station Address hex None Any valid hexadecimal link station address from 0x01 to OxFE Specifies the address of the link station Type Ox followed by the link station address None Editing SDLC Link Station Parameters To edit SDLC link station parameters complete the following steps If you just completed the procedure in Adding an SDLC Link Station go to Step 3 1 In the
20. DIES AND ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING WITHOUT LIMITATION ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE Licensee is responsible for the security of 303540 A Rev 00 iii its own data and information and for maintaining adequate procedures apart from the Software to reconstruct lost or altered files data or programs 4 Limitation of liability IN NO EVENT WILL BAY NETWORKS OR ITS LICENSORS BE LIABLE FOR ANY COST OF SUBSTITUTE PROCUREMENT SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES RESULTING FROM INACCURATE OR LOST DATA OR LOSS OF USE OR PROFITS ARISING OUT OF OR IN CONNECTION WITH THE PERFORMANCE OF THE SOFTWARE EVEN IF BAY NETWORKS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES IN NO EVENT SHALL THE LIABILITY OF BAY NETWORKS RELATING TO THE SOFTWARE OR THIS AGREEMENT EXCEED THE PRICE PAID TO BAY NETWORKS FOR THE SOFTWARE LICENSE 5 Government Licensees This provision applies to all Software and documentation acquired directly or indirectly by or on behalf of the United States Government The Software and documentation are commercial products licensed on the open market at market prices and were developed entirely at private expense and without the use of any U S Government funds The license to the U S Government is granted only with restricted rights and use duplication or disclosure by the U S Government is subject to the restrictions set
21. DLC link station can receive Enter a value from 1 through 127 1 3 6 1 4 1 18 3 5 1 7 5 1 9 Response Timer 400 milliseconds for APPN none for DLSw 100 through 64000 Specifies the length of time that SDLC waits before turning the poll bit around when it has no work to do Enter a value from 100 through 64000 1 3 6 1 4 1 18 3 5 1 7 5 1 28 RNR Timer 3 minutes 1 through 90 Controls the length of time that an SDLC link station allows its adjacent link station to remain in a busy RNR state before declaring it inoperative This parameter operates with the RNR Retry Limit parameter Enter a value from 1 through 90 1 3 6 1 4 1 18 3 5 1 7 5 1 15 303540 A Rev 00 4 21 Configuring SDLC Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID RNR Retry Limit 4 1 through 64000 Used with the RNR Timer parameter to provide the overall timeout before sending an outage message to a device Enter a value from 1 through 64000 where 1 causes SDLC to generate an outage after the first RNR Timer expires and 64000 specifies an infinite number of retries 1 3 6 1 4 1 18 3 5 1 7 5 1 27 REPLYTO Timer 30 tenths of a second 1 through 600 Specifies the maximum length of time a primary link station waits for a response frame after sending a frame with a poll bit before trying to poll another station This timer st
22. Limit parameter 4 9 Idle Line Timer parameter 4 9 Inbound Link Station Limit parameter 4 13 information field in SDLC frames 1 8 information frames 1 8 Initial Flow Control Credit parameter 4 14 Internal Clock Speed parameter 3 4 L Link Connection Retry Limit parameter 4 11 Link Connection Timer parameter 4 10 Link Station Address parameter 4 7 4 18 Link Station Role parameter 4 7 link stations adding 4 15 configuration considerations 2 1 editing 4 18 to 4 28 types 1 2 local acknowledgment 1 6 Max Frame Retransmit Count parameter 4 8 Max Frame Size parameter 4 12 Max XID Size parameter 4 12 MAXDATA parameter 4 20 MAXIN parameter 4 21 MAXOUT parameter 2 2 4 20 MCTI support 1 8 multipoint topology 1 2 negotiable link stations 1 2 configuring 2 1 4 7 Non productive Retry Limit parameter 4 8 Non productive Timer parameter 4 8 Index 2 O Outbound Link Station Limit parameter 4 13 P parameters global 4 3 parameters SDLC default settings A 1 to A 4 interface 4 4 to 4 14 line 3 3 to 3 5 link station 4 18 to 4 28 physical connections 1 8 point to point topology 1 2 Poll Bit Set In I Frame parameter 4 28 Port Name parameter 4 6 Port Write Retry Limit parameter 4 10 Port Write Timer parameter 4 10 Pre Activation Contact Frame parameter 4 25 Primary Full Duplex parameter 4 11 primary link stations 1 2 configuring 2 1 4 7 Primary SDLC operations 1 2 produ
23. N configurations PU 2 1 devices only a Bay Networks router supports negotiable link stations where the two link stations exchange XIDs to negotiate which one will be primary and which secondary Primary SDLC Support A Bay Networks router configured as a primary device on an SDLC link can e Control the data link e Issue commands Initiate error recovery procedures The primary link station addresses and sends command frames to any or all secondary link stations on the network Each frame carries the individual group or broadcast address of the station or stations to which the frame is directed A secondary link station receives commands and responds to primary link station polls 303540 A Rev 00 Synchronous Data Link Control Overview Figure 1 1 illustrates DLSw single and dual switch networks where Bay Networks routers perform as primary SDLC nodes a Single switch DLSw network SDLC primary
24. Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Enable Reject Frame TRUE TRUE FALSE Specifies whether SDLC can send a reject REJ command upon receiving an out of sequence Information frame If the REJ command is not used SDLC requests retransmission of frames through Receiver Ready RR Receiver Not Ready RNR or Information frames The REJ command is useful only with full duplex transmission Enter TRUE to use REJ commands for out of sequence Information frames otherwise enter FALSE 1 3 6 1 4 1 18 3 5 1 7 2 1 20 Max XID Size 256 2 through 256 Specifies the maximum XID size that will be sent or received on this link Enter a value from 2 through 256 1 3 6 1 4 1 18 3 5 1 7 2 1 22 Max Frame Size PDU2057 PDU265 PDU521 PDU1033 PDU2057 Specifies the maximum frame size SDLC supports This value includes the transmission header TH and request header RH Enter a frame size that is equal to or larger than the largest frame size that will be received 1 3 6 1 4 1 18 3 5 1 7 2 1 24 303540 A Rev 00 Editing SDLC Parameters Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Total Link Station Limit 16 1 t
25. SDLC link station supports negotiable connections over APPN networks Enter TRUE if the SDLC link station supports negotiable connections otherwise enter FALSE 1 3 6 1 4 1 18 3 5 1 7 2 1 33 303540 A Rev 00 4 7 Configuring SDLC Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Max Frame Retransmit Count 5 through 7 Specifies the maximum number of times to retransmit a frame or group of frames Enter a value from 1 through 7 1 3 6 1 4 1 18 3 5 1 7 2 1 23 Non productive Timer 2000 milliseconds 1 through 65535 Specifies the time allowed for receipt of a valid frame from the primary link station This parameter operates with the Non productive Retry Limit parameter It is intended for secondary SDLC routers SDLC primarily uses this timer to produce an outage when a secondary station produces continuous frames without setting the F bit Final bit In large configurations with many SDLC connections you should increase this value to allow more time for the primary link station to respond Enter a value from 1 through 65535 1 3 6 1 4 1 18 3 5 1 7 2 1 12 Non productive Retry Limit 15 1 through 65535 Used with the Non productive Timer parameter to provide the overall time before SDLC sends an outage message to th
26. SDLC parameters Use the Configuration Manager to edit any of the Site Manager default settings shown here Note that some SDLC parameters assume different defaults in Site Manager depending on whether you are configuring APPN or DLSw Table A 1 SDLC Line Parameters Default Setting Default Setting Parameter with APPN with DLSw Clock Source Internal Internal Internal Clock Speed 19 2 KB 19 2 KB Sync Line Coding NRZ NRZ Cable Type RS232 RS232 RTS Enable Disable Disable 303540 A Rev 00 A 1 Configuring SDLC Services Table A 2 SDLC Interface Parameters Default Setting Default Setting Parameter with APPN with DLSw Enable Enable Enable Port Name APPN port name Circuit name Link Station Role Negotiate Primary Link Station Address 4 None Support Negotiable Connection True False Max Frame Retransmit Count 5 5 Non productive Timer 2000 ms 2000 ms Non productive Retry Limit 15 15 Idle Line Timer 6000 ms 6000 ms Idle Line Retry Limit 20 20 Port Write Timer 3000 ms 3000 ms Port Write Retry Limit 10 10 Link Connection Timer 3000 ms 3000 ms Link Connection Retry Limit 10 10 Primary Full Duplex False False Secondary Full Duplex False False Enable Reject Frame True True Max XID Size 256 256 Max Frame Size PDU2057 PDU2057 Total Link Station Limit 16 16 Inbound Link Station Limit 8 8 Outbound Link Station Limit
27. XTERNAL from the other device The parameter specifies the origin of the synchronous timing signals If you set this parameter to Internal this router supplies the required timing signals If you set this parameter to External an external network device supplies the required timing signals Use this parameter when connecting the SNA equipment directly to the router Either the router or the SNA equipment can define the speed of the SDLC link You must configure one device to internal clocking and the other device to external clocking Instructions For direct connection to a control unit such as an IBM 3174 set to Internal For connection to a modem set to External For direct connection to an IBM 3745 either the router or the IBM 3745 can provide the clock source If the IBM 3745 does not provide clocking set to Internal MIB Object ID 1 3 6 1 4 1 18 3 4 5 1 13 303540 A Rev 00 3 3 Configuring SDLC Services Parameter Default Options Function Instructions MIB Object ID Internal Clock Speed 19200 KB 1200 B 2400 Bl 4800 B 7200 B 9600 B 19200 B 32000 B 38400 B 56 KB 64 KB 125 KB 230 KB 420 KB 625 KB 833 KB 1 25 MB 2 5 MB 5 MB Sets the clock speed of an internally supplied clock when Clock Source is set to Internal Attached devices must be capable of operating at the specified speed Some of the more common allowed speeds for IBM products are as follows An IBM 3274 w
28. arts when a frame without the F bit is received and stops only when a frame with an F bit is received Enter a value from one tenth of a second through 600 tenths of a second You should set the timeout value to be no less than the result of the following formula 2 MAXOUT x MAXDATA x 8 x 10 line speed in bits sec Edit the REPLYTO Timer value whenever you adjust baud rate with the Internal Clock Speed parameter or the external modem baud rate For example if you are using a line with a 4800 baud rate increase the REPLYTO Timer parameter to 60 tenths of a second 1 3 6 1 4 1 18 3 5 1 7 5 1 8 4 22 303540 A Rev 00 Editing SDLC Parameters Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID REPLYTO Retry Limit 10 1 through 64000 Controls the number of times an adjacent secondary link station fails to respond before the primary link station sends an outage message Enter a value from 1 through 64000 where 1 causes SDLC to generate an outage after the first REPLYTO Timer expires and 64000 specifies an infinite number of retries 1 3 6 1 4 1 18 3 5 1 7 5 1 26 Fast Poll Timer 400 milliseconds 1 through 64000 Controls the timeout required before reinserting an adjacent secondary link station into the polling list after the adjace
29. ase MIB object ID 303540 A Rev 00 4 1 Configuring SDLC Services The Technician Interface lets you modify parameters by issuing set and commit commands with the MIB object ID This process is equivalent to modifying parameters using Site Manager For more information about using the Technician Interface to access the MIB refer to Using Technician Interface Software Caution The Technician Interface does not verify that the value you enter for a parameter is valid Entering an invalid value can corrupt your configuration Accessing SDLC Parameters To access and edit SDLC parameters begin at the Configuration Manager window and select Protocols SDLC to display the SDLC options submenu Figure 4 1 Configuration Hodei Em Deecription LtEnnmzturg Figure 4 1 Configuration Manager Window 4 2 303540 A Rev 00 Editing SDLC Parameters Editing SDLC Global Parameters SDLC has only one configurable parameter Enable visible at the global level To change the setting of the global parameter begin at the Configuration Manager window and proceed as follows 1 Select Protocols SDLC Global The Edit SDLC Global Parameters window appears Figure 4 2 Edit SDLC Global Parameters Figure 4 2 Edit SDLC Global Parameters Window 2 Change the setting of the Enable parameter if necessary Refer to the description of the parameter that follows this procedure 3 Click on OK to save your change
30. at the media on which the Software is provided will be free from defects in materials and workmanship under normal use for a period of 90 days from the date Software is first shipped to Licensee Bay Networks will replace defective media at no charge if it is returned to Bay Networks during the warranty period along with proof of the date of shipment This warranty does not apply if the media has been damaged as a result of accident misuse or abuse The Licensee assumes all responsibility for selection of the Software to achieve Licensee s intended results and for the installation use and results obtained from the Software Bay Networks does not warrant a that the functions contained in the software will meet the Licensee s requirements b that the Software will operate in the hardware or software combinations that the Licensee may select c that the operation of the Software will be uninterrupted or error free or d that all defects in the operation of the Software will be corrected Bay Networks is not obligated to remedy any Software defect that cannot be reproduced with the latest Software release These warranties do not apply to the Software if it has been i altered except by Bay Networks or in accordance with its instructions ii used in conjunction with another vendor s product resulting in the defect or iii damaged by improper environment abuse misuse accident or negligence THE FOREGOING WARRANTIES AND LIMITATIONS ARE EXCLUSIVE REME
31. can configure any SDLC interface for APPN services APPN nodes can communicate with adjacent nodes using SDLC links over point to point and multipoint configurations For information on the APPN node types and how to configure APPN see Configuring APPN Services 303540 A Rev 00 1 9 Configuring SDLC Services Using DLSw Services with SDLC You can configure any SDLC interface for DLSw services For information on DLSw see Configuring DLSw Services For More Information about SDLC For more information about SDLC and IBM SNA refer to the following IBM publications IBM Synchronous Data Link Control Concepts GA27 3093 IBM System Network Architecture Technical Overview GC30 30723 IBM System Network Architecture Concepts and Products GC30 3072 e Systems Network Architecture APPN Architecture Reference SC30 3422 3 e APBN Architecture and Product Implementations Tutorial GG24 3669 Data Link Switching Switch to Switch Protocol RFC 1434 Data Link Switching Switch to Switch Protocol RFC 1795 1 10 303540 A Rev 00 Chapter 2 SDLC Implementation Notes Keep the following implementation notes in mind when you configure SDLC services Link Stations With DLSw you can configure SDLC as a primary or secondary link station only With APPN you can configure primary secondary and negotiable link stations You set up SDLC link stations as follows Primary link stations configure the adjacent li
32. can purchase Bay Networks documentation sets CDs and selected technical publications through the Bay Networks Collateral Catalog The catalog is located on the World Wide Web at support baynetworks com catalog html and is divided into sections arranged alphabetically The CD ROMs section lists available CDs e The Guides Books section lists books on technical topics e The Technical Manuals section lists available printed documentation sets Make a note of the part numbers and prices of the items that you want to order Use the Marketing Collateral Catalog description link to place an order and to print the order form xiv 303540 A Rev 00 Preface How to Get Help For product assistance support contracts or information about educational services go to the following URL http www baynetworks com corporate contacts Or telephone the Bay Networks Technical Solutions Center at 800 2LANWAN 303540 A Rev 00 XV Chapter 1 Synchronous Data Link Control Overview This chapter describes the following Synchronous Data Link Control SDLC features and services e SDLC networking Link station roles Primary SDLC support Secondary SDLC support Enhanced synchronous pass through Transmission capabilities SDLC support over MCTI links Physical connections Frame format e Using APPN and DLSw services with SDLC Read this chapter if you are configuring Advanced Peer to Peer Network
33. ce 1 License Grant Bay Networks Inc Bay Networks grants the end user of the Software Licensee a personal nonexclusive nontransferable license a to use the Software either on a single computer or if applicable on a single authorized device identified by host ID for which it was originally acquired b to copy the Software solely for backup purposes in support of authorized use of the Software and c to use and copy the associated user manual solely in support of authorized use of the Software by Licensee This license applies to the Software only and does not extend to Bay Networks Agent software or other Bay Networks software products Bay Networks Agent software or other Bay Networks software products are licensed for use under the terms of the applicable Bay Networks Inc Software License Agreement that accompanies such software and upon payment by the end user of the applicable license fees for such software 2 Restrictions on use reservation of rights The Software and user manuals are protected under copyright laws Bay Networks and or its licensors retain all title and ownership in both the Software and user manuals including any revisions made by Bay Networks or its licensors The copyright notice must be reproduced and included with any copy of any portion of the Software or user manuals Licensee may not modify translate decompile disassemble use for any competitive analysis reverse engineer distribute or create
34. ct support xv PU Name parameter 4 19 publications Bay Networks xiv R Receive Buffer Pool Size parameter 4 14 REPLYTO Retry Limit parameter 4 23 REPLYTO Timer parameter 2 2 4 22 Response Timer parameter 4 21 RNR Retry Limit parameter 4 22 RNR Timer parameter 4 21 RTS Enable parameter 2 1 3 5 303540 A Rev 00 S SDLC deleting from router 4 28 enabling 3 1 to 3 5 4 4 interfaces deleting 4 15 editing parameters 4 4 link stations adding 4 15 defined 1 2 editing 4 18 over MCTI connections 1 8 overview 1 1 to 1 9 parameters defaults A 1to A 4 editing 4 1 to 4 28 publications about 1 10 timers 2 2 Secondary Full Duplex parameter 4 11 secondary link stations 1 2 configuring 2 1 4 7 secondary SDLC configuring 1 6 limitations 1 6 operations 1 4 size window configuring 2 2 4 20 Slow Contact Retry Limit parameter 4 27 Slow Contact Timer parameter 4 26 Slow Poll Count Limit parameter 4 24 Slow Poll Timer parameter 4 24 supervisory frames 1 8 Support Negotiable Connection parameter 4 7 support Bay Networks xv Sync Line Coding parameter 3 5 synchronous line parameters 3 3 to 3 5 synchronous passthrough with primary and secondary SDLC 1 6 303540 A Rev 00 T technical publications xiv technical support xv text conventions xi timers SDLC 2 2 topologies 1 2 Total Link Station Limit parameter 4 13 transmission capabilities 1 8 U unnumbered frames 1 8 W
35. ding an SDLC Onk SrA uarie b exe ra es conn a DRE ERE cx UR Cu RE cA 4 15 Editing SDLC Link Station ParaleterB sec isapbo ere rid ait en seo o Lora RR SXK E Ero sposi o teta diee te seis aa E SDLC Link Station Parameter Descriptions 12 dert rrr xeu ERO need re E nain 4 19 Deleting SDLC from the ROUET ise ecc enc cR ELS DX tERba ERR RUNE be K Ra ile A ERE Usa 4 28 Appendix A SDLC Default Parameter Settings Index vi 303540 A Rev 00 Figures Figure 1 1 Primary SDLC Routers in a Single and b Dual Switch DLSw MiesbWOIKS 1 sient ba iepr rp Erit Reed AX nr EX RA REEUA 1 3 Figure 1 2 Secondary SDLC Routers in a Single aid b Dual Switch DLSw Networks L1 cantar kr ek AK Phe 1 5 Figure 1 3 Locally Acknowledged Synchronous Pass Through in a j Single and ibi Dual Swit h DLSw Networks uisu ceci te c aanp ern kl renia ari cuiua 1 7 Figure RE MENDA CIE mL 1 9 Figure 3 1 SDLC Line Parameters Window 1er nere rmt tenda 3 2 Figure dos Select Protocole WIFID Lisceccissesk tese ri at beri donante thin GE na NAE Figure 4 1 Configuration Manager Window 2 ccccceceeeeeeeeeeeeceeeaeeeeeeeeeeaaeeseneees 4 2 Figure 4 2 Edit SDLC Global Parameters Window sse 4 3 Figure 4 3 SDLC Interface Configuration Window sseeeeeeess 405 Figure 4 4 SDLC Link Station Configuration Window eeeseeeeee 4 16 Figure 4 5 Link Station Configuration Window
36. e device Enter a value from 1 through 65535 where 1 causes SDLC to generate an outage after the first Non productive Timer expires and 65535 specifies an unlimited retry count 1 3 6 1 4 1 18 3 5 1 7 2 1 13 4 8 303540 A Rev 00 Editing SDLC Parameters Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Idle Line Timer 6000 milliseconds 1 through 65535 Specifies the overall time used to determine whether a line is completely inactive This parameter operates with the Idle Line Retry Limit parameter It is intended for primary SDLC routers Enter a value from 1 through 65535 Enter the maximum value 65535 if you never want to terminate sessions on the line even if it is completely inactive If you enter a smaller value the timer expires when no activity occurs on the line for the specified number of milliseconds In large configurations with many SDLC connections you should increase this value to allow more time for data exchange 1 3 6 1 4 1 18 3 5 1 7 2 1 10 Idle Line Retry Limit 20 1 through 65535 Specifies the number of times to run the Idle Line Timer before failure This parameter operates with the Idle Line Timer parameter to provide the overall idle timeout period Enter a value from 1 through 65535 where 1 causes SDLC to generate an outage after the first Idle Line Timer expires and 65535 specif
37. er the name of the port you want to assign to this SDLC interface You can use any combination of alphanumeric characters We recommend you use the same name assigned to the circuit on which you added SDLC for example S51 1 3 6 1 4 1 18 3 5 1 7 2 1 4 4 6 303540 A Rev 00 Editing SDLC Parameters Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Link Station Role PRIMARY for DLSw networks NEGOTIATE for APPN networks PRIMARY SECONDARY NEGOTIATE Defines the link station role With DLSw you can configure only primary and secondary SDLC link stations With APPN you can configure primary secondary and negotiable link stations Enter PRIMARY or SECONDARY if you want to assign a specific role to the link station Enter NEGOTIATE if you want the link station to exchange XIDs with another negotiable link station to determine which will be primary and which secondary 1 3 6 1 4 1 18 3 5 1 7 2 1 27 Link Station Address 4 for APPN networks None for DLSw networks 1 through 254 Specifies the port address if the link station role is secondary or negotiable Enter a value from 1 through 254 1 3 6 1 4 1 18 3 5 1 7 2 1 29 Support Negotiable Connection TRUE for APPN networks FALSE for DLSw networks TRUE FALSE Specifies whether this
38. ervices a network can transport existing SDLC traffic over a router based topology that Enables existing SDLC traffic to use a high speed multiprotocol backbone network e Simplifies the migration to a router based network by incorporating SDLC traffic into the multiprotocol backbone without converting the existing endstations e Provides local acknowledgment of the SDLC protocol at each side of the router based network eliminating polling and acknowledgment traffic from the network backbone e Allows high speed links into the FEP improving response time Figure 1 3 illustrates locally acknowledged synchronous pass through using single and dual switch services 1 6 303540 A Rev 00 Synchronous Data Link Control Overview a Single switch DLSw network Secondary operations Primary operations Host a a CN m SDLC E E SDLC L3 L Z Zo 3174 Front end proc
39. esser H 3174 Z 3174 SDLC SDLC ge ee a e b Dual switch DLSw network SDLC SDLC primary secondary routers Host router local acknowledgment m E S E S c E IP 3174 backbone c DES Front end processer E SL ZZ im 3174 L 3174 SDLC TCP IP SDLC 4 gt 4 4 DSW0025A Figure 1 3 Locally Acknowledged Synchronous Pass Through in a Single and b Dual Switch DLSw Networks 303540 A Rev 00 1 7 Configuring SDLC Services Transmission Capabilities SDLC supports full and half duplex transmissions over leased lines Full duplex data transmissions can occur in both directions between primary and secondary link stations at the same time Half duplex transmissions can occur in only one direction at a time SDLC Support over MCT1 Links Version 11 0 supports SDLC over Multichannel T1 MCT1 links connectors labeled MCT1 for SNA transmission over DLSw wide areas The router must contain at least one MCT1 link module and you must select SDLC from the WAN Protocols window For more information on configuring MCT1 refer to Configuring WAN Line Services Physical Connections SDLC communicates with attached SNA SDLC devices using V 24 RS 232 V 35 and X 21 nonswitched connections SDLC supports line speeds up to 64 Kb sec depending on the physical connection For example V 24 interfaces can operate at speeds up to
40. forth in subparagraph c 1 of the Commercial Computer Software Restricted Rights clause of FAR 52 227 19 and the limitations set out in this license for civilian agencies and subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause of DFARS 252 227 7013 for agencies of the Department of Defense or their successors whichever is applicable 6 Use of Software in the European Community This provision applies to all Software acquired for use within the European Community If Licensee uses the Software within a country in the European Community the Software Directive enacted by the Council of European Communities Directive dated 14 May 1991 will apply to the examination of the Software to facilitate interoperability Licensee agrees to notify Bay Networks of any such intended examination of the Software and may procure support and assistance from Bay Networks 7 Term and termination This license is effective until terminated however all of the restrictions with respect to Bay Networks copyright in the Software and user manuals will cease being effective at the date of expiration of the Bay Networks copyright those restrictions relating to use and disclosure of Bay Networks confidential information shall continue in effect Licensee may terminate this license at any time The license will automatically terminate if Licensee fails to comply with any of the terms and conditions of the license Upon termination for any rea
41. from the SDLC station it then establishes a DLSw connection with the host This minimizes the logging of unavailable or nonresponding SDLC stations You should use SNRM whenever the router is communicating with a remote LAN gateway such as a 3174 11R with the LAN gateway feature Additionally use SNRM whenever you use group polling e Use DISC SNRME and TEST only if your network requires one of these options 1 3 6 1 4 1 18 3 5 1 7 5 1 30 303540 A Rev 00 4 25 Configuring SDLC Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Fast Contact Timer 4000 milliseconds 1 through 64000 Controls the timeout required before retransmitting an unacknowledged contact frame SNRM or XID For primary SDLC link stations only this parameter operates with the Fast Contact Retry Limit parameter and is also used for special pre activation polling Enter a value from 1 through 64000 The value you enter must be greater than the REPLYTO Timer value described earlier 1 3 6 1 4 1 18 3 5 1 7 5 1 16 Fast Contact Retry Limit 4 1 through 64000 Controls the number of times to transmit a contact frame for example SNRM before switching to the Slow Contact Timer This parameter operates with the Fast Contact Timer parameter Enter a value from
42. hrough 254 Specifies the total link station activation limit Enter the number of link stations from 1 through 254 that you want to reserve for inbound and outbound activation on this port 1 3 6 1 4 1 18 3 5 1 7 2 1 30 Inbound Link Station Limit 8 through 254 Specifies the inbound link station activation limit Enter the number of link stations from 1 through 254 that you want to reserve for inbound activation on this port 1 3 6 1 4 1 18 3 5 1 7 2 1 31 Outbound Link Station Limit 8 1 through 254 Specifies the outbound link station activation limit Enter the number of link stations from 1 through 254 that you want to reserve for outbound activation on this port 1 3 6 1 4 1 18 3 5 1 7 2 1 32 303540 A Rev 00 4 13 Configuring SDLC Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Receive Buffer Pool Size 7 1 through 255 Sets the receive buffer pool size that is the number of buffers you want to preallocate for receiving frames from the line Enter the number of buffers you want for the receive buffer pool You can enter a value from through 255 however we recommend that you accept the default because increasing the receive buffer pool size uses up more memory 1 3 6 1 4 1 18 3 5 1 7 2 1 34 Init
43. ial Flow Control Credit 7 1 through 50 Regulates the flow of data from the SDLC device to the SDLC interface Accept the default This parameter is reserved for future enhancements 1 3 6 1 4 1 18 3 5 1 7 2 1 9 Enable Stats Collection TRUE TRUE FALSE Turns statistics collection on or off for this port Enter TRUE to enable statistics collection otherwise enter FALSE 1 3 6 1 4 1 18 3 5 1 7 2 1 35 303540 A Rev 00 Editing SDLC Parameters Deleting an SDLC Interface To delete an SDLC interface from its associated physical circuit 1 Inthe SDLC Interface Configuration window refer to Figure 4 3 select the interface you want to delete 2 Click on Delete The system deletes the SDLC entry you selected and the entry disappears from the list of interfaces in the SDLC Interface Configuration window To simultaneously delete all SDLC interfaces from the node follow the steps in the section Deleting SDLC from the Router at the end of this chapter Adding an SDLC Link Station To add an SDLC link station 1 Inthe SDLC Interface Configuration window refer to Figure 4 3 select Link Station The SDLC Link Station Configuration window appears Figure 4 4 303540 A Rev 00 4 15 Configuring SDLC Services E SDLC Link Station Configuration j Done 551 Ox04 Add Delete Apply Values Help C Enable ENABLE PU Name ONE Group Address 0 MAXDATA PDU2057 MAXOUT 7 M
44. ies an unlimited retry count 1 3 6 1 4 1 18 3 5 1 7 2 1 11 303540 A Rev 00 4 9 Configuring SDLC Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Port Write Timer 3000 milliseconds 1 through 65535 Specifies the maximum amount of time allowed to transmit a complete frame This parameter operates with the Port Write Retry Limit parameter Enter a value from 1 through 65535 1 3 6 1 4 1 18 3 5 1 7 2 1 14 Port Write Retry Limit 10 1 through 65535 Used with the Port Write Timer parameter to provide the overall time allowed to transmit a complete frame before SDLC sends an outage message to the device Enter a value from 1 through 65535 where 1 causes SDLC to generate an outage after the first Port Write Timer expires and 65535 specifies an unlimited retry count 1 3 6 1 4 1 18 3 5 1 7 2 1 15 Link Connection Timer 3000 milliseconds 1 through 65535 Used with the Link Connection Retry Limit parameter to provide the time interval after which SDLC fails to activate a port because it has not received a Data Set Ready DSR response This feature is for switched lines only and is not currently implemented Accept the default This parameter is reserved for future enhancements 1 3 6 1 4 1 18 3 5 1 7 2 1 16 4 10
45. ing APPN or Data Link Switching DLSw networks SDLC parameter settings can influence APPN and DLSw performance SDLC Networking SDLC is the synchronous bit oriented link control protocol in the IBM Systems Network Architecture SNA SDLC s connection oriented protocol operates with the Data Link Switching DLSw protocol and the Advanced Peer to Peer Networking APPN architecture 303540 A Rev 00 1 1 Configuring SDLC Services SDLC supports point to point and multipoint topologies In point to point topologies only one SDLC device connects to the SDLC port In multipoint topologies several SDLC devices connect to the SDLC port via a modem sharing type device SDLC Features You can configure most of the following features using the SDLC parameters described in Chapter 4 Link Station Roles A link station is a logical connection between adjacent nodes where one node is a primary link station and the other a secondary link station Only one link station on an SDLC line can be the primary station all others must be secondary SDLC supports primary secondary and negotiable link stations In DLSw configurations a Bay Networks router must be configured as either a primary or secondary link station When primary the router communicates with downstream PU 2 0 and PU 2 1 nodes when secondary with front end processors and similar communications controllers A secondary router functions as a PU 2 0 device In APP
46. ith an V 24 RS 232 interface supports up to 9600 b s Some support speeds up to 19200 b s An IBM 3274 with a V 35 interface supports up to 64 Kb s An IBM 3174 with a V 24 RS 232 interface supports up to 19200 b s An IBM 3174 with a V 35 interface and running Licensed Internal Code C supports up to 256 Kb s Click on Values and set the clock speed for the internal clock to the desired data transmission rate across the synchronous line This parameter is unavailable when Clock Source is set to External 1 3 6 1 4 1 18 3 4 5 1 14 3 4 303540 A Rev 00 Enabling SDLC Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Sync Line Coding NRZ NRZ NRZI NRZI Mark Sets the same line coding value for all devices attached to the same SDLC link You can change the value of this parameter to match the line coding of a device at the other end of the line This parameter is relevant only for the AN and ASN routers and the Octal Sync module Other Bay Networks router platforms use NRZ encoding NRZ Indicates Non Return to Zero encoding NRZI Indicates Non Return to Zero Inverted encoding NRZI Mark Indicates Non Return to Zero Inverted Mark encoding Select NRZ or NRZI NRZI Mark is not generally used for SDLC 1 3
47. nk Station Role PRIMARY Link Station Address Support Negotiable Connection Max Frame Retransmit Count Figure 4 3 SDLC Interface Configuration Window 2 Select the interface you want to customize The parameter values for that interface appear in the parameter value windows Click on Values to display the valid range of values for any parameter 3 Edit the parameters you want to change Refer to the parameter descriptions in the next section 4 Click on Apply to save your changes Repeat Steps 2 through 4 for each interface you want to edit 5 Click on Done to exit the SDLC Interface Configuration window 303540 A Rev 00 4 5 Configuring SDLC Services SDLC Interface Parameter Descriptions Use the following parameter descriptions to edit SDLC interface parameters Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Enable Enable Enable Disable Enables or disables the SDLC interface to this WAN physical circuit Select Enable if you disabled this SDLC interface and now want to re enable it on its associated WAN physical circuit Select Disable if you want to disable this SDLC interface on its associated WAN physical circuit 1 3 6 1 4 1 18 3 5 1 7 2 1 2 Port Name APPN port name or DLSw circuit name Any valid port name Defines the port name you want to assign to this SDLC interface Ent
48. nk station s parameters Secondary link stations configure the station s own link station parameters Negotiable link stations configure the station s own link station as well as a potential adjacent link station Refer to Chapter 4 for information on configuring SDLC link stations Synchronous Line Parameters When you add SDLC to a synchronous line Site Manager opens the SDLC Line Parameters window and you can then edit the following parameters Clock Source Internal Clock Speed Sync Line Coding Cable Type RTS Enable 303540 A Rev 00 2 1 Configuring SDLC Services Chapter 3 describes how to complete the SDLC Line Parameters To view or change synchronous line parameters that do not appear in the SDLC Line Parameters window edit the line parameters of the desired circuit For information on editing other synchronous line parameters refer to Configuring WAN Line Services Note The BOFL Breath of Life parameter enables proprietary BOFL messages to travel over a point to point connection between the local router and a remote peer If this parameter is enabled set it to Disable so that these messages do not interfere with SDLC frames SDLC Timers SDLC uses timers to manage traffic over SDLC links You should edit the timer values whenever you adjust the speed of the line If you configure SDLC on a link with a slow baud rate the default values for SDLC timer parameters may not be adequate for the line
49. nt secondary station has been removed for no response This parameter operates with the Fast Poll Count Limit parameter Enter a value from 1 through 64000 Although the timer value is in milliseconds you should specify a value so that the timer runs for seconds 1 3 6 1 4 1 18 3 5 1 7 5 1 22 Fast Poll Count Limit 16 1 through 65535 Controls the number of times a link station is removed from the polling list on the normal poll timer before SDLC switches to the Slow Poll Timer This parameter operates with the Fast Poll Timer parameter Enter a value from 1 through 65535 where 1 causes SDLC to switch to the Slow Poll Timer after the first Fast Poll Timer expires and 65535 specifies an infinite number of retries 1 3 6 1 4 1 18 3 5 1 7 5 1 23 303540 A Rev 00 4 23 Configuring SDLC Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Slow Poll Timer 1000 milliseconds 1 through 64000 Allows polling to continue using this timer when the Fast Poll Count Limit expires This parameter operates with the Slow Poll Count Limit parameter Enter a value from 1 through 64000 1 3 6 1 4 1 18 3 5 1 7 5 1 24 Slow Poll Count Limit 65535 1 through 65535 Controls the number of times a link station is removed from the polling list before sending an outage message to a device This parameter operates with the Slo
50. ptions where there is more than one option You must choose only one of the options Do not type the braces when entering the command Example If the command syntax is show ip alerts routes you must enter either show ip alerts or show ip routes Indicate optional elements in syntax descriptions Do not type the brackets when entering the command Example If the command syntax is show ip interfaces alerts you can enter either show ip interfaces or show ip interfaces alerts Indicate that you repeat the last element of the command as needed Example If the command syntax is ethernet 2 1 lt parameter gt value you enter ethernet 2 1 and as many parameter value pairs as needed Indicates file and directory names new terms book titles and variables in command syntax descriptions Where a variable is two or more words the words are connected by an underscore Example If the command syntax is show at valid route valid route is one variable and you substitute one value for it Indicates system output for example prompts and system messages Example Set Bay Networks Trap Monitor Filters xii 303540 A Rev 00 Preface Acronyms separator gt vertical line AN APPC APPN ASN CP DLSw FEP TEEE LAN LLC MAC MCTI NetBIOS NRZ NRZI PDU PU RFC Shows menu paths Example Protocols IP identifies the IP option on the Protocols menu Separates choices
51. rnia Should you have any questions concerning this Agreement contact Bay Networks Inc 4401 Great America Parkway P O Box 58185 Santa Clara California 95054 8185 LICENSEE ACKNOWLEDGES THAT LICENSEE HAS READ THIS AGREEMENT UNDERSTANDS IT AND AGREES TO BE BOUND BY ITS TERMS AND CONDITIONS LICENSEE FURTHER AGREES THAT THIS AGREEMENT IS THE ENTIRE AND EXCLUSIVE AGREEMENT BETWEEN BAY NETWORKS AND LICENSEE WHICH SUPERSEDES ALL PRIOR ORAL AND WRITTEN AGREEMENTS AND COMMUNICATIONS BETWEEN THE PARTIES PERTAINING TO THE SUBJECT MATTER OF THIS AGREEMENT NO DIFFERENT OR ADDITIONAL TERMS WILL BE ENFORCEABLE AGAINST BAY NETWORKS UNLESS BAY NETWORKS GIVES ITS EXPRESS WRITTEN CONSENT INCLUDING AN EXPRESS WAIVER OF THE TERMS OF THIS AGREEMENT iv 303540 A Rev 00 Contents Preface Before YOU NBO usd ousate seta i EO dades Sa Dx oA IR ERR ER FENCE UR A ERR RAO NOSE RO MMC ed xi M uper yn aci T xi POPU NE seces iss Um EU xiii Bay Networks Technical Publications 42 in tht tik tk RA rk bL nk ik ean o INE as Aic XV Chapter 1 Synchronous Data Link Control Overview BDLEC NEORI raisata aaee ae Aaa 1 1 SDLC PSU pgina a E A 1 2 Link Stalon BDIOS scisco PEET P EL Pomary SDLC SUPPONI E M 1 2 ECON SE ODLO UCIT ricsina eaa ana Saka araa anaana EANG 1 4 Secondary SDLC LinltstioflB xcxiccusleneidesniiacadecsedecsieuninedcon indiana Secondary SDLG COBIIGUISfl saison re i a et dt ar ee tian d
52. s and exit the window 303540 A Rev 00 4 3 Configuring SDLC Services Parameter Enable Default Enable Options Enable Disable Function Enables or disables the system software mechanisms that use the SDLC interface on a synchronous circuit The system software also performs the following actions when you choose a setting Disable Switches every SDLC interface enabled on the router to the disabled inactive state Enable Reinitializes every SDLC interface on the router based on The current setting of the associated interface Enable parameter e The current state of the associated circuit Instructions Select Disable to switch every SDLC interface existing on the node to the inactive state Select Enable only when an existing SDLC interface is in the disabled state You can choose Enable to globally reinitialize all SDLC interfaces configured on the node Then each interface maintains the most recent setting of its own interface Enable parameter MIB Object ID 1 3 6 1 4 1 18 3 5 1 7 1 2 Editing SDLC Interface Parameters To access and edit the SDLC interface parameters begin at the Configuration Manager window refer to Figure 4 1 and proceed as follows 1 Select Protocols SDLC Interfaces The SDLC Interface Configuration window appears Figure 4 3 4 4 303540 A Rev 00 Editing SDLC Parameters EI SDLC Interface Configuratic Done Delete Enable ENABLE Port Name Sot Li
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54. son Licensee will immediately destroy or return to Bay Networks the Software user manuals and all copies Bay Networks is not liable to Licensee for damages in any form solely by reason of the termination of this license 8 Export and Re export Licensee agrees not to export directly or indirectly the Software or related technical data or information without first obtaining any required export licenses or other governmental approvals Without limiting the foregoing Licensee on behalf of itself and its subsidiaries and affiliates agrees that it will not without first obtaining all export licenses and approvals required by the U S Government 1 export re export transfer or divert any such Software or technical data or any direct product thereof to any country to which such exports or re exports are restricted or embargoed under United States export control laws and regulations or to any national or resident of such restricted or embargoed countries or ii provide the Software or related technical data or information to any military end user or for any military end use including the design development or production of any chemical nuclear or biological weapons 9 General If any provision of this Agreement is held to be invalid or unenforceable by a court of competent jurisdiction the remainder of the provisions of this Agreement shall remain in full force and effect This Agreement will be governed by the laws of the state of Califo
55. the rest If you want to edit these parameters see Chapter 4 Enabling SDLC on an Interface To enable SDLC on an interface 1 Select SDLC in the WAN Protocols window The Configuration Manager displays the SDLC Line Parameters window Figure 3 1 303540 A Rev 00 3 1 Configuring SDLC Services Cancel OK Values Help Clock Source INTERNAL Internal Clock Speed 19200 Sync Line Coding NRZ Cable Type RS232 RTS Enable MISABLE Figure 3 1 SDLC Line Parameters Window 2 Configure the parameters Refer to the parameter descriptions in this chapter to configure the synchronous line parameters 3 Click on OK The Select Protocols window opens Figure 3 2 Select Protocols Protocols O DLSw O APPN OK Cancel Figure 3 2 Select Protocols Window 3 2 303540 A Rev 00 Enabling SDLC Services 4 Select either DLSw or APPN to run on the SDLC circuit Site Manager then displays the appropriate windows from which you enable DLSw or APPN For information on enabling DLSw and APPN refer to Configuring DLSw Services and Configuring APPN Services SDLC Line Parameter Descriptions Use the following parameter descriptions to configure the SDLC line parameters Figure 3 1 Parameter Clock Source Default Internal on COMI COM2 and so on External on MCTI Options External Internal Function Identifies whether the router provides clocking INTERNAL or receives clocking E
56. w Poll Timer parameter Enter a value from 1 through 65535 where 1 causes SDLC to generate an outage after the first Slow Poll Timer expires and 65535 specifies an infinite number of retries 1 3 6 1 4 1 18 3 5 1 7 5 1 25 4 24 303540 A Rev 00 Editing SDLC Parameters Parameter Default Options Function Instructions MIB Object ID Pre Activation Contact Frame XID XID DISC SNRM SNRME TEST Specifies the frame to use for pre activation polling Pre activation sets up the router connection table so that DLSw connects to the host before connecting to the SDLC station or the reverse The frames include XID Exchange Identification DISC Disconnect SNRM Set Normal Response Mode SNRME Set Normal Response Mode Extended TEST Test The XID default setting causes the router to establish a connection with the host before connecting to the SDLC link station The line activates and the router sends the SNRM frame to the SDLC station Selecting a value other than XID causes the router to send that value to the SDLC station before attempting to connect to the host Click on Values and select one of the parameter settings as follows e Accept the XID default setting to establish a DLSw connection with the host When the connection succeeds the router sends an SNRM frame to the SDLC station e Select SNRM to establish a connection to the SDLC station first When the router receives a response
57. window size 2 2 configuring 4 20 X XID exchange identification 1 2 4 7 Index 3

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