Verifying The Rscn Timer Configuration; Rscn Timer Configuration Distribution - Cisco MDS 9000 Series Configuration Manual

Verifying the RSCN Timer Configuration

To configure the RSCN timer, follow these steps:
Step 1
switch# config t
switch(config)#
Enters configuration mode.
Step 2 switch(config)# rscn distribute
Enables RSCN timer configuration distribution.
Step 3
switch(config)# rscn event-tov 300 vsan 10
Sets the event time-out value in milliseconds for the selected VSAN. In this example, the event time-out value is set to
300 milliseconds for VSAN 12. The range is 0 to 2000 milliseconds. Setting a zero (0) value disables the timer.
Step 4
switch(config)# no rscn event-tov 300 vsan 10
Reverts to the default value (2000 milliseconds for Fibre Channel VSANs or 1000 milliseconds for FICON VSANs).
Step 5
switch(config)# rscn commit vsan 10
Commits the RSCN timer configuration to be distributed to the switches in VSAN 10.
Verifying the RSCN Timer Configuration
You verify the RSCN timer configuration using the show rscn event-tov vsan command.
switch# show rscn event-tov vsan 10
Event TOV : 1000 ms

RSCN Timer Configuration Distribution

Because the timeout value for each switch is configured manually, a misconfiguration occurs when different
switches time out at different times. This means different N-ports in a network can receive RSCNs at different
times. Cisco Fabric Services (CFS) infrastructure alleviates this situation by automatically distributing the
RSCN timer configuration information to all switches in a fabric. This also reduces the number of SW-RSCNs.
Refer to the Cisco MDS 9000 Family NX-OS System Management Configuration Guide .
RSCN supports two modes, distributed and nondistributed. In distributed mode, RSCN uses CFS to distribute
configuration to all switches in the fabric. In nondistributed mode, only the configuration commands on the
local switch are affected.
Note
All configuration commands are not distributed. Only the rscn event-tov tov vsan vsan command is distributed.
Note
Only the RSCN timer configuration is distributed.
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
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Managing FLOGI, Name Server, FDMI, and RSCN Databases