Suppressing Domain Format Sw-Rscns; Clearing Rscn Statistics; Configuring The Rscn Timer - Cisco Nexus 5000 Series Configuration Manual

RSCN

Suppressing Domain Format SW-RSCNs

A domain format SW-RSCN is sent whenever the local switch name or the local switch management IP
address changes. This SW-RSCN is sent to all other domains and switches over the ISLs. The remote switches
can issue GMAL and GIELN commands to the switch that initiated the domain format SW-RSCN to determine
what changed. Domain format SW-RSCNs can cause problems with some non-Cisco SAN switches.
You can suppress the transmission of these SW-RSCNs over an ISL.
SUMMARY STEPS
1. configure terminal
2. rscn suppress domain-swrscn vsan vsan-id
DETAILED STEPS
Command or Action
Step 1
configure terminal
Example:
switch# configure terminal
switch(config)#
Step 2 rscn suppress domain-swrscn vsan vsan-id
Example:
switch(config)# rscn suppress domain-swrscn vsan 250

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.
Cisco Nexus 5000 Series NX-OS SAN Switching Configuration Guide, Release 5.2(1)N1(1)
208
Managing FLOGI, Name Server, FDMI, and RSCN Databases
Purpose
Enters global configuration mode.
Suppresses transmission of domain format
SW-RSCNs for the specified VSAN.
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