Clearing Rscn Statistics; Configuring The Rscn Timer - Cisco Nexus 5500 Series NX-OS Configuration Manual

Managing FLOGI, Name Server, FDMI, and RSCN Databases
Procedure
Step 1
Step 2

Clearing RSCN Statistics

You can clear the counters and later view the counters for a different set of events. For example, you can keep
track of how many RSCNs or SW-RSCNs are generated on a particular event (such as ONLINE or OFFLINE
events). You can use these statistics to monitor responses for each event in the VSAN.
This 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. When a timeout occurs, all the events are
dequeued and coalesced RSCNs are sent to registered users. The default timer values minimize the number
of coalesced RSCNs that are sent to registered users. Some deployments require smaller event timer values
to track changes in the fabric.
Note The RSCN timer value must be the same on all switches in the VSAN.
Before performing a downgrade, make sure that you revert the RSCN timer value in your network to the
Note
default value. Failure to do so will disable the links across your VSANs and other devices.
You can configure the RSCN timer.
OL-30895-01
Command or Action
configure terminal
Example:
switch# configure terminal
switch(config)#
rscn suppress domain-swrscn vsan vsan-id
Example:
switch(config)# rscn suppress domain-swrscn
vsan 250
Cisco Nexus 5500 Series NX-OS SAN Switching Configuration Guide, Release 7.x
Purpose
Enters global configuration mode.
Suppresses transmission of domain format
SW-RSCNs for the specified VSAN.
RSCN
193