Adding lSLs to a Cisco switch

You might need to add ISLs to a switch if you are adding or upgrading hardware such as additional or faster controllers or faster switches.

Before you begin

Steps that are completed on one switch must also be completed on the other to ensure ISL connectivity.

Procedure

  1. Disable the ISL ports of the ISLs to be added on both switches in the fabric:
    FC_switch_A_1#config t

    Enter the configuration commands, one per line. End with CTRL-Z after all the configuration commands have been entered.

    	FC_switch_A_1(config)# interface fc1/36
    	FC_switch_A_1(config-if)# shut
    	FC_switch_A_1(config)# end
  2. Insert SFPs into the ports you are adding as ISL ports, and cable them according to the Installation and Configuration Guide.
    Ensure that these ports are listed in the Installation and Configuration Guide for the switch you are adding them to.
  3. Configure the ISL ports in accordance with the Installation and Configuration Guide.
  4. Enable all ISL ports (if not enabled) on both switches in the fabric: FC_switch_A_1# config t

    Enter the configuration commands, one per line. End with CTRL-Z.

     FC_switch_A_1# interface fc1/36
    	FC_switch_A_1(config-if)# no shut
    	FC_switch_A_1(config)# end
  5. Verify the ISLs are established between both switches: show topology isl
  6. Repeat the procedure on the second fabric:
    --------------------------------------------------------------------------------
    	__________Local_________ _________Remote_________ VSAN Cost I/F  PC    I/F  Band
    	 PC Domain SwName   Port  Port   SwName Domain PC          Stat Stat Speed width
    	--------------------------------------------------------------------------------
    	  1   0x11 cisco9 fc1/36  fc1/36 cisco9 0xbc    1    1   15 up   up    16g   64g
    	  1   0x11 cisco9 fc1/40  fc1/40 cisco9 0xbc    1    1   15 up   up    16g   64g
    	  1   0x11 cisco9 fc1/44  fc1/44 cisco9 0xbc    1    1   15 up   up    16g   64g
    	  1   0x11 cisco9 fc1/48  fc1/48 cisco9 0xbc    1    1   15 up   up    16g   64g