Cisco Nexus 5000 Series Switch CLI Software Configuration Guide (OL-16597-01, July 2009)

The following example shows how to clear the RSCN statistics for the specified VSAN:
switch# clear rscn statistics vsan 1
After clearing the RSCN statistics, you can view the cleared counters by entering the show rscn statistics
command:
switch# show rscn statistics vsan 1
Configuring the RSCN Timer
RSCN maintains a per VSAN event list queue, where the RSCN events are queued as they are generated.
When the first RSCN event is queued, a per VSAN timer starts. Upon time-out, all the events are dequeued
and coalesced RSCNs are sent to registered users. The default timer values minimize the number of coalesced
RSCNs sent to registered users. Some deployments require smaller event timer values to track changes in the
fabric.
The RSCN timer value must be the same on all switches in the VSAN.Note
Before performing a downgrade, make sure that you revert the RCSN timer value in your network to the
default value. Failure to do so will disable the links across your VSANs and other devices.
Note
To configure the RSCN timer, perform this task:
Procedure
PurposeCommand or Action
Enters configuration mode.switch# configuration terminal
Step 1
Enables RSCN timer configuration distribution.switch(config)# rscn distribute
Step 2
Sets the event time-out value in milliseconds for the
specified VSAN. The range is 0 to 2000 milliseconds.
Setting a zero (0) value disables the timer.
switch(config)# rscn event-tov timeout
vsan vsan-id
Step 3
Reverts to the default value (2000 milliseconds for
Fibre Channel VSANs).
switch(config)# no rscn event-tov
timeout vsan vsan-id
Step 4
Commits the RSCN timer configuration to be
distributed to the switches in the specified VSAN.
switch(config)# rscn commit vsan
vsan-id
Step 5
Verifying the RSCN Timer Configuration
You verify the RSCN timer configuration using the show rscn event-tov vsan command. The following
example shows how to clear the RSCN statistics for VSAN 10:
switch# show rscn event-tov vsan 10
Event TOV : 1000 ms
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
598 OL-16597-01
Managing FLOGI, Name Server, FDMI, and RSCN Databases
Configuring the RSCN Timer