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ONTAP MetroCluster

Add, remove, or change ISL ports nondisruptively on Cisco IP switches

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You might need to add, remove, or change ISL ports on Cisco IP switches. You can convert dedicated ISL ports to shared ISL ports, or change the speed of ISL ports on a Cisco IP switch.

About this task

If you are converting dedicated ISL ports to shared ISL ports, ensure the new ports meet the Requirements for shared ISL ports.

You must complete all the steps on both switches to ensure ISL connectivity.

The following procedure assumes you are replacing a 10-Gb ISL connected at switch port Eth1/24/1 with two 100-Gb ISLs that are connected to switch ports 17 and 18.

Note If you are using a Cisco 9336C-FX2 switch in a shared configuration connecting NS224 shelves, changing the ISLs might require a new RCF file. You do not require a new RCF file if your current and new ISL speed is 40Gbps and 100Gbps. All other changes to ISL speed requires a new RCF file. For example, changing the ISL speed from 40Gbps to 100Gbps does not require a new RCF file, but changing the ISL speed from 10Gbps to 40Gbps requires a new RCF file.
Before you begin

Refer to the Switches section of the NetApp Hardware Universe to verify the supported transceivers.

Steps

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

    Note You only need to disable the current ISL ports if you are moving them to a different port, or the speed of the ISL is changing. If you are adding an ISL port with the same speed as the existing ISLs, go to Step 3.

    You must enter only one configuration command for each line and press Ctrl-Z after you have entered all the commands, as shown in the following example:

    switch_A_1# conf t
switch_A_1(config)# int eth1/24/1
switch_A_1(config-if)# shut
switch_A_1(config-if)#
switch_A_1#

switch_B_1# conf t
switch_B_1(config)# int eth1/24/1
switch_B_1(config-if)# shut
switch_B_1(config-if)#
switch_B_1#

  2. Remove the existing cables and transceivers.

  3. Change the ISL port as required.

    Note If you are using Cisco 9336C-FX2 switches in a shared configuration connecting NS224 shelves, and you need to upgrade the RCF file and apply the new configuration for the new ISL ports, follow the steps to upgrade the RCF files on MetroCluster IP switches.

    Option

    Step

    To change the speed of an ISL port…​

    Cable the new ISLs to the designated ports according to their speeds. You must ensure that these ISL ports for your switch are listed in the MetroCluster IP Installation and Configuration.

    To add an ISL…​

    Insert QFSPs into the ports you are adding as ISL ports. Ensure they are listed in the MetroCluster IP Installation and Configuration and cable them accordingly.

  4. Enable all ISL ports (if not enabled) on both switches in the fabric beginning with the following command:

    switch_A_1# conf t

    You must enter only one configuration command per line and press Ctrl-Z after you have entered all the commands:

    switch_A_1# conf t
switch_A_1(config)# int eth1/17
switch_A_1(config-if)# no shut
switch_A_1(config-if)# int eth1/18
switch_A_1(config-if)# no shut
switch_A_1(config-if)#
switch_A_1#
switch_A_1# copy running-config startup-config

switch_B_1# conf t
switch_B_1(config)# int eth1/17
switch_B_1(config-if)# no shut
switch_B_1(config-if)# int eth1/18
switch_B_1(config-if)# no shut
switch_B_1(config-if)#
switch_B_1#
switch_B_1# copy running-config startup-config

  5. Verify that the ISLs and port channels for the ISLs are established between both switches:

    switch_A_1# show int brief

    You should see the ISL interfaces in the command output as shown in the following example:

    Switch_A_1# show interface brief
--------------------------------------------------------------------------------
Ethernet        VLAN    Type Mode   Status  Reason                 Speed     Port
Interface                                                                    Ch #
--------------------------------------------------------------------------------
Eth1/17         1       eth  access down    XCVR not inserted        auto(D) --
Eth1/18         1       eth  access down    XCVR not inserted        auto(D) --

------------------------------------------------------------------------------------------
Port-channel VLAN    Type Mode   Status  Reason                              Speed   Protocol
Interface
------------------------------------------------------------------------------------------
Po10         1       eth  trunk  up      none                                a-100G(D)  lacp
Po11         1       eth  trunk  up      none                                a-100G(D)  lacp

  6. Repeat the procedure for fabric 2.