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)
  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)