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ONTAP MetroCluster

Changing speed of ISL ports on a Cisco FC switch

Contributors netapp-aoife
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You might need to change the speed of ISL ports on a switch to improve the quality of the ISL. ISLs traveling greater distances might need their speed lowered to improve quality.

About this task

  • Complete all the steps on both switches to ensure ISL connectivity.

  • Enable console logging before performing this task.

Steps

  1. Disable the ISL ports of the ISLs that you want to change the speed of on both switches in the fabric:

    FC_switch_A_1# config t

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

     FC_switch_A_1(config)# interface fc1/36
	FC_switch_A_1(config-if)# shut
	FC_switch_A_1(config)# end

  2. Change the speed of the ISL ports on both switches in the fabric:

    FC_switch_A_1# config t

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

     FC_switch_A_1(config)# interface fc1/36
	FC_switch_A_1(config-if)# switchport speed 16000
    Note Speeds for ports are 16 = 16,000 Gbps, 8 = 8,000 Gbps, 4 = 4,000 Gbps.

    Ensure that these ISL ports for your switch are listed in the Fabric-attached MetroCluster Installation and Configuration Guide.

  3. Enable all ISL ports (if not enabled) on both switches in the fabric:

    FC_switch_A_1# config t

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

     FC_switch_A_1(config)# interface fc1/36
	FC_switch_A_1(config-if)# no shut
	FC_switch_A_1(config)# end

  4. Verify the ISLs are established between both switches:

    show topology isl

    --------------------------------------------------------------------------------
	__________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

  5. Repeat the procedure for the second switch fabric.