Changing the default configuration speed of a stretch MetroCluster configuration

The distance between your nodes and the FC-VI adapter speed dictates the default configuration speed of your stretch MetroCluster configuration. If the distance between the nodes is greater than what is supported with the default configuration speed, you must change the default configuration speed of the FC-VI adapter.

The stretch MetroCluster system's default configuration speed must conform to the stretch MetroCluster system setup requirements and restrictions.

You must perform these steps at both the nodes in a MetroCluster configuration if they are configured at different speeds.
  1. At the storage console prompt, halt the storage system by entering the following command: halt -f
  2. Reset the configuration speed by entering the following commands.
    If you want to set the speed to... Then...
    8 Gbps
    Note: You can set the speed to 8 Gbps if you have 16G FC-VI card with 16 G SFP.
    1. Enter the following command:setenv ispfcvi-force-8G-only? True
    2. Verify that your storage system is configured for 8 Gbps by entering the following command:printenv ispfcvi-force-8G-only?
      The storage system console displays output similar to the following:
      Variable Name        	 Value
      -------------------- --------------
      ispfcvi-force-8G-only? 	 true
    3. If you have modified the speed to 4 or 2 Gbps, undo the modified speed setting by entering the following command:unsetenv ispfcvi-force-4G-only?unsetenv ispfcvi-force-2G-only?
    4. Verify that your system is unconfigured for 4 or 2 Gbps by entering the following command:printenv ispfcvi-force-4G-only?printenv ispfcvi-force-2G-only?
      The storage system console displays output similar to the following:
      Variable Name        	  Value
      -------------------- --------------
      ispfcvi-force-4G-only?  *** Undefined ***
    4 Gbps
    1. Enter the following command:setenv ispfcvi-force-4G-only? True
    2. Verify that your storage system is configured for 4 Gbps by entering the following command:printenv ispfcvi-force-4G-only?
      The storage system console displays output similar to the following:
      Variable Name        	 Value
      -------------------- --------------
      ispfcvi-force-4G-only? 	 true
    3. If you previously modified the speed to 2 or 8 Gbps, undo the modified speed setting entering the following command:unsetenv ispfcvi-force-2G-only?unsetenv ispfcvi-force-8G-only?
    4. Verify that your system is unconfigured for 2 or 8 Gbps by entering the following command:printenv ispfcvi-force-2G-only?printenv ispfcvi-force-8G-only?
      The storage system console displays output similar to the following:
      Variable Name        	  Value
      -------------------- --------------
      ispfcvi-force-2G-only?  *** Undefined ***
    2 Gbps
    1. Enter the following command:setenv ispfcvi-force-2G-only? True
    2. Verify that your storage system is configured for 2 Gbps by entering the following command:printenv ispfcvi-force-2G-only?
      If your storage system is configured correctly, the system console displays output similar to the following:
      Variable Name            Value
      -------------------- --------------------
      ispfcvi-force-2G-only?   true
    3. If you previously modified the default speed to 4 or 8 Gbps, undo the modified speed setting by entering the following command:unsetenv ispfcvi-force-4G-only?unsetenv ispfcvi-force-8G-only?
    4. Verify that your storage system is unconfigured for 4 or 8 Gbps by entering the following command:printenv ispfcvi-force-4G-only?printenv ispfcvi-force-8G-only?
      The storage system console displays output similar to the following:
      Variable Name            Value
      -------------------- ------------------
      ispfcvi-force-4G-only?   *** Undefined ***
  3. Boot the storage system by entering the following command:boot_ontap