You cannot perform a nondisruptive downgrade to any earlier version that does not support per-VSAN FC
timers.
Caution
This configuration must be propagated to all switches in the fabric—be sure to configure the same value in
all switches in the fabric.
Note
If a switch is downgraded to Cisco MDS SAN-OS Release 1.2 or 1.1 after the timer is configured for a VSAN,
an error message is issued to warn against strict incompatibilities. Refer to the Cisco MDS 9000 Family
Troubleshooting Guide.
To configure per-VSAN Fiber Channel timers, follow these steps:
Step 1 switch# config terminal
switch(config)#
Enters configuration mode.
Step 2 switch(config)# fctimer D_S_TOV 6000 vsan 2
Warning: The vsan will be temporarily suspended when updating the timer value This configuration
would impact whole fabric. Do you want to continue? (y/n) y
Since this configuration is not propagated to other switches, please configure the same value in all
the switches
Configures the D_S_TOV value to be 6000 msec for VSAN 2. Suspends the VSAN temporarily. You have the option to
end this command, if required.
About fctimer Distribution
You can enable per-VSAN fctimer fabric distribution for all Cisco MDS switches in the fabric. When you
perform fctimer configurations, and distribution is enabled, that configuration is distributed to all the switches
in the fabric.
You automatically acquire a fabric-wide lock when you issue the first configuration command after you
enabled distribution in a switch. The fctimer application uses the effective and pending database model to
store or commit the commands based on your configuration.
Refer to the Cisco MDS 9000 Family NX-OS System Management Configuration Guide for more information
on the CFS application.
Enabling fctimer Distribution
To enable or disable fctimer fabric distribution, follow these steps:
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
301
Advanced Features and Concepts
About fctimer Distribution
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