Configuring Timers Per-VSAN

You can also issue the fctimer command for a specified VSAN to configure different TOV values for VSANs with special links like FC or IP tunnels. You can configure different E_D_TOV, R_A_TOV, and D_S_TOV values for individual VSANs. Active VSANs are suspended or activated when their timer values are changed.

Caution You cannot perform a nondisruptive downgrade to any earlier version which does not support per-VSAN FC timers.
Note This configuration must be propagated to all switches in the fabric--be sure to configure the same value in all switches in the fabric.

If a switch is downgraded to SAN-OS Release 1.2(x) or 1.1(x) after the timer is configured for a VSAN, an error message is issued to warn the user about strict incompatibilities. Refer to the Cisco MDS 9000 Family Troubleshooting Guide for further information.