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Chapter 25
Advanced Features and Concepts
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
This configuration must be propagated to all switches in the fabric—be sure to configure the same value
Note
in all switches in the fabric.
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 FC timers, follow these steps:
Command
Step 1
switch# config t
switch(config)
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
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
To enable fctimer fabric distribution, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# fctimer distribute
switch(config)# no fctimer distribute
Committing fctimer Changes
When you commit the fctimer configuration changes, the effective database is overwritten by the
configuration changes in the pending database and all the switches in the fabric receive the same
configuration. When you commit the fctimer configuration changes without implementing the session
feature, the fctimer configurations are distributed to all the switches in the physical fabric.
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Chapter 5, "Using the CFS Infrastructure"
Purpose
Enters configuration mode.
Configures the D_S_TOV value
to be 6000 ms for VSAN 2.
Suspends the VSAN temporarily.
You have the option to end this
command, if required.
for more information on the CFS application.
Purpose
Enters configuration mode.
Enables fctimer configuration distribution to all
switches in the fabric. Acquires a fabric lock and
stores all future configuration changes in the pending
database.
Disables (default) fctimer configuration distribution to
all switches in the fabric.
Cisco MDS 9000 Family Configuration Guide
Fibre Channel Time Out Values
25-3
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