Network OS Administration Guide

Supporting Network OS 6.0.1a

Part Number: 53-1003768-04

Configuring a long-distance ISL

To configure a long-distance ISL, perform the following steps in privileged EXEC mode. Each long-distance ISL port of a VCS must be connected to a long-distance ISL port on the remote VCS.

  1. Verify that the default standard-distance ISL configuration is correct by using the show running-config command.
    switch# show running-config interface tengigabitethernet 51/0/1
    interface TenGigabitEthernet 51/0/1
    fabric isl enable
    fabric trunk enable	
    no shutdown
  2. Set the port to support Metro VCS up to 30 km by using the long-distance-isl command.
    switch# interface tengigabit 51/0/1
    switch(conf-if-te-51/0/1)# long-distance-isl 30000
  3. Perform the same long-distance ISL configuration on the interface of the peer RBridge on the remote sites of the Metro VCS.
  4. Verify that the long-distance ISL is correctly formed by using the show fabric isl and show fabric islports command.
    switch(conf-if-te-51/0/1)# do show fabric isl
    Rbridge-id: 51   #ISLs: 1
     Src       Src           Nbr       Nbr
    Index   Interface       Index   Interface               Nbr-WWN           BW   Trunk  Nbr-Name
    ----------------------------------------------------------------------------------------------
    4       Te 51/0/1        4      Te 53/0/1       10:00:00:05:33:65:3B:50   10G   Yes   "VCS3-53"
    switch(conf-if-te-51/0/1)# do show fabric islports
    Name:       VCS3-51
    Type:       131.4
    State:      Online
    Role:       Fabric Principal
    VCS Id:     3
    Config Mode:Local-Only
    Rbridge-id: 51
    WWN:        10:00:00:05:33:e5:d0:4b
    FCF MAC:    00:05:33:e5:d0:cf
     Index   Interface      State   Operational State
    ===================================================================
      0     Fo 51/0/49        Down
      1     Fo 51/0/50        Down
      2     Fo 51/0/51        Down
      3     Fo 51/0/52        Down
      4     Te 51/0/1         Up    ISL 10:00:00:05:33:65:3B:50 "VCS3-53" (Trunk Primary)
    <Truncated>
  5. Use the show ip interface brief command to confirm the configuration, making sure that Status is "up" and Protocol is "LD ISL," as in the following example output.
    switch# show ip interface brief
    
    Interface                    IP_Address     VRF              Status         Protocol
    =========================    ===========    =============    ===========    =============
    TenGigabitEthernet 51/0/1    unassigned     default-vrf      up             up (LD ISL)