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Cisco Catalyst 5000 Series Manual

Configuring token ring lan emulation
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Configuring Token Ring LAN Emulation
Last Updated: December 4, 2012
This chapter describes how to configure Token Ring LAN emulation (LANE) on the Catalyst 5000
platform. This feature is supported on the following Catalyst 5000 series ATM modules:
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Support for the Token Ring LANE feature was first introduced in Cisco IOS Release 12.0(7)T.
Note
Beginning with Cisco IOS Release 11.3, all commands supported on the Cisco 7500 series routers are also
supported on the Cisco 7000 series.
For a complete description of the commands in this chapter, refer to the the Cisco IOS Switching Services
Command Reference. To locate documentation of other commands that appear in this chapter, use the
command reference master index or search online.
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Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats
and feature information, see
To find information about the features documented in this module, and to see a list of the releases in which
each feature is supported, see the feature information table at the end of this module.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support.
To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
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Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA
ATM Dual PHY OC-12 modules (WS-X5161 and WS-X5162)
ATM Dual OC-3 modules (WS-5167 and WS-X5168)
Restrictions, page 4
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and the release notes for your platform and software release.

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Summary of Contents for Cisco Catalyst 5000 Series

  • Page 1: Table Of Contents

    Beginning with Cisco IOS Release 11.3, all commands supported on the Cisco 7500 series routers are also supported on the Cisco 7000 series. For a complete description of the commands in this chapter, refer to the the Cisco IOS Switching Services Command Reference. To locate documentation of other commands that appear in this chapter, use the command reference master index or search online.

  • Page 2: Token Ring Lane On Atm

    By using Token Ring LANE, you can scale your networks to larger sizes while preserving your investment in LAN technology. Note The Catalyst 5000 series Cisco IOS Token Ring LANE software does not support Ethernet LANE or RFC 1483 permanent virtual connections (PVCs). LANE Token Ring Components LANE defines emulated LANs (ELANs).

  • Page 3: Network Support

    Note ELAN components coexist on one or more Cisco routers or Catalyst switches that contain an ATM module. On Cisco routers or Catalyst switches the LES and the BUS are combined into a single entity.

  • Page 4: Restrictions

    SRB, source-route transparent bridging (SRT), and source-route switching The Cisco implementation of LANE over IEEE 802.5 uses existing terminology and configuration options for Token Rings and provides for the IEEE 802.5 transport of Token Ring frames across an ATM switching fabric.

  • Page 5: Prerequisites

    The system recovers when the network break is repaired. Prerequisites Token Ring LANE requires that the Catalyst 5000 series switch contain one of the following ATM modules running ATM software Release 4.9b or later: •...

  • Page 6: Token Ring Lane Configuration Task List

    Note The ATM module uses a subset of the Cisco IOS software. Generally, the Cisco IOS software works the same on the ATM module as it does on routers. After configuring the ATM module, you are ready to implement LANE.

  • Page 7: Creating A Lane Plan And Worksheet

    Note The ATM module uses a subset of Cisco IOS software. Generally, Cisco IOS software works the same on the ATM module as it does on routers. To configure the ATM module, you must use the ATM configuration mode in the Cisco IOS software. To enter global configuration mode, enter the configure EXEC command at the privileged EXEC prompt (ATM#).

  • Page 8: Configuring The Atm Module From The Terminal

    Configuring the ATM Module from the Terminal Default LANE Configuration • Names of the ELANs that will have unrestricted membership. • Names of the ELANs that will have restricted membership. • Local segment ID for the ELAN. The local segment ID must be identical to the ring number of the TrCRF.

  • Page 9: Configuring The Atm Module From Nvram

    Configuring the Prefix on the LightStream 1010 Switch Before you configure LANE components on a Catalyst 5000 series switch ATM module, you must configure the Cisco LightStream 1010 switch with the ATM address prefix to be used by all LANE components in the switch cloud.

  • Page 10: Setting Up The Signalling Pvc

    Note On the Cisco LightStream 1010 switch, the ATM address prefix is called the node ID. Prefixes must be 26 digits long. If you provide fewer than 26 digits, zeros are added to the right of the specified value to fill it to 26 digits.

  • Page 11: Displaying Lane Default Addresses

    Entering the LECS ATM Address on the LightStream 1010 Switch You must enter the LECS ATM address into each ATM switch (such as a Cisco LightStream 1010 ATM switch) connected to an ATM module in your LANE network and save the address permanently so that the value will not be lost when the switch is reset or powered off.

  • Page 12: Configuring The Lecs Database

    Setting Up the Database for Restricted-Membership ELANs, page 15 Setting Up the Database for the Default ELAN When you configure a Catalyst 5000 series switch ATM module as the LECS for one default ELAN, you need to provide the following information:...
  • Page 13 Configuring the LECS Database Setting Up the Database for the Default ELAN • A name for the database • The ATM address of the LES for the ELAN • A default name for the ELAN In addition, you indicate that the LECS’s ATM address is to be computed automatically. The default ELAN cannot be a restricted-membership ELAN.
  • Page 14 Configuring the LECS Database Setting Up the Database for Unrestricted-Membership ELANs Command or Action Purpose Step 3 ATM(lane-config-database)# Assigns a segment number to the emulated Token Ring LAN in the configuration database. nameelan -namelocal-seg- idsegment-number The segment number you specify for the local-seg-id keyword must remain the same for each entry you add and it must also be identical to the ring number of the TrCRF.
  • Page 15 Configuring the LECS Database Setting Up the Database for Restricted-Membership ELANs DETAILED STEPS Command or Action Purpose Step 1 ATM(config)# lane Enters database configuration mode for the LANE database that you specify. databasedatabase-name Step 2 ATM(lane-config-database)# Binds the name of the first ELAN to the ATM address of the LES/BUS for that ELAN nameelan-name1server-atm- in the configuration database.
  • Page 16 Configuring the LECS Database Setting Up the Database for Restricted-Membership ELANs Those client database entries specify which clients are allowed to join the ELAN. When a client requests to join an ELAN, the LECS consults its database and then assigns the client to the ELAN specified in the LECS’s database.

  • Page 17: Binding The Lecs To The Atm Interface

    Binding the LECS to the ATM Interface Setting Up the Database for Restricted-Membership ELANs Command or Action Purpose Step 5 ATM(lane-config-database)# Assigns a segment number to the second emulated Token Ring LAN in the configuration database. nameelan -name2local-seg- idsegment-number The segment number you specify for the local-seg-id keyword must be identical to the ring number of the TrCRF.

  • Page 18: Setting Up A Les Bus And A Lec

    Setting Up a LES BUS and a LEC For each Catalyst 5000 series switch ATM module that will participate in LANE, set up the necessary servers and clients for each ELAN and then display and record the server and client ATM addresses. Be sure to keep track of the switch ATM interface where the LECS will eventually be located.
  • Page 19 • Setting Up the Token Ring VLAN on a LEC, page 22 Guidelines for Setting Up a LEC The Catalyst 5000 series Token Ring LANE requires the following software: • Catalyst 5000 series supervisor engine software Release 4.3(1a) and later •...
  • Page 20 Setting Up a LES BUS and a LEC Guidelines for Setting Up a LEC interface configuration command or the set vlan 12 name crf12 type trcrf ring 0x12 parent 100 interface configuration command. When defining a corresponding LEC, you could enter name crf12 local-seg-id 0x12 or name crf12 local- seg-id 18 because 18 is the decimal equivalent of 0x12.
  • Page 21 Setting Up a LES BUS and a LEC Creating a Token Ring VLAN example shows an LECS database configuration that specifies marktng as the ELAN name for VLAN 1003: lane database test name marktng server-atm-address 47.0091810000000061705B8301.00400B020011.01 interface ATM0 no ip address no ip route-cache atm pvc 1 0 5 qsaal atm pvc 2 0 16 ilmi...

  • Page 22: Configuring Redundant Lane Services

    Configuring Redundant LANE Services The LANE protocol does not specify where any of the ELAN server entities should be located, but for the purpose of reliability and performance, Cisco implements these server components on its routers and LAN switches. With Phase I LANE, only one LECS, capable of serving multiple ELANs, and only one LES per ELAN could exist for an ATM cloud.
  • Page 23 LES/BUS and LECS redundancy works only with Cisco LECS and LES combinations. Third-party LANE server components continue to interoperate with the LECS and LES/BUS function of Cisco routers and switches, but cannot take advantage of the redundancy features.
  • Page 24 Configuring Redundant LANE Services Enabling ILMI Keepalive Timeout Enabling ILMI Keepalive Timeout If enabled, ILMI sends keepalive messages on an ongoing basis on the active physical (PHY) to the switch, and the switch responds. If the response is not obtained for the last four polls, the ILMI timer times out and the Dual PHY changes from active PHY to backup PHY.
  • Page 25 Configuring Redundant LANE Services Configuring Fast SSRP for Redundant LANE Services • You must first configure the redundant LES/BUS pairs on subinterfaces for that ELAN. • You must then enter the ATM addresses of the redundant LES/BUS pairs into the LECS database for the ELAN.
  • Page 26 Configuring Redundant LANE Services Configuring Fast SSRP for Redundant LANE Services ATM(config-subif)# interface atm0.2 ATM(config-subif)# lane server-bus tokenring Eng_ELAN ATM(config-subif)# ^Z ATM# show lane server LE Server ATM0.1 ELAN name: default Admin: up State: operational type: tokenring Max Frame Size: 4472 ATM address: 47.00918100000000E04FACB401.00100DAACC41.01 LECS used: 47.007900000000000000000000.00A03E000001.00 NOT yet connected LE Server ATM0.2...

  • Page 27: Verifying The Lane Setup

    Enter the show lane EXEC command on each Catalyst 5000 series switch to verify the LANE setup before you set up the LECs on the next Catalyst 5000 series switch. Print the display or make a note of these ATM addresses so that you can use it when you set up the LECS database.

  • Page 28: Token Ring Lane Configuration Example

    Cisco IOS Switching Services Command Reference . Token Ring LANE Configuration Example This section provides a configuration example composed of two Catalyst 5000 series switches and a Cisco LightStream 1010 ATM switch as shown in the figure below.
  • Page 29 Catalyst 5000 series switches with the ATM modules installed are running ATM software Release 4.9b or later. • Catalyst 5000 series switch 1 runs the LES/BUS and LECS on interface atm0 and the LEC on interface atm0.1. • Catalyst 5000 series switch 2 runs LEC on interface atm0.1.

  • Page 30: Console> (Enable) Session

    9. Save the configuration in NVRAM by entering the write memory command, as follows: 10. Start and bind the LECS on the Catalyst 5000 series switch 1 by entering the interface atm0, the lane config database database_name interface configuration command, and the lane config auto-config-atm- address interface configuration commands at the ATM prompt.
  • Page 31 ATM# write memory Step 6 Start a LES/BUS pair on Catalyst 5000 series switch 1 by entering the interface atm0 and the lane server-bus tokenring commands in global configuration mode. On the console of Catalyst 5000 series switch 1, enter the...
  • Page 32 ATM# write memory Step 10 Start and bind the LECS on the Catalyst 5000 series switch 1 by entering the interface atm0, the lane config database database_name interface configuration command, and the lane config auto-config-atm-address interface configuration commands at the ATM prompt. You see the following display:...
  • Page 33 Step 12 Start the LEC on the Catalyst 5000 series switches 1 and 2 by entering the interface atm0.1 command and the lane client tokenring 112 crf112 interface configuration command in configuration mode on the consoles of switches 1 and 2.

This manual is also suitable for:

Ws-x5161Ws-5167Ws-x5162Ws-x5168

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