Timer Configuration Across All Vsans; Timer Configuration Per-Vsan - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Fibre Channel Time Out Values
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

Timer Configuration Across All VSANs

You can modify Fibre Channel protocol related timer values for the switch.
The D_S_TOV, E_D_TOV, and R_A_ TOV values cannot be globally changed unless all VSANs in the
Caution
switch are suspended.
If a VSAN is not specified when you change the timer value, the changed value is applied to all VSANs
Note
in the switch.
To configure Fibre Channel timers across all VSANs, follow these steps:
Command
Step 1
switch# config t
switch(config)
Step 2
switch(config)# fctimer R_A_TOV 6000

Timer Configuration Per-VSAN

You can also issue the fctimer for a specified VSAN to configure different TOV values for VSANs with
special links like FC or IP tunnels. You can configure different E_D_TOV, R_A_TOV, and D_S_TOV
values for individual VSANs. Active VSANs are suspended and activated when their timer values are
changed.
You cannot perform a nondisruptive downgrade to any earlier version that does not support per-VSAN
Caution
FC timers.
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.
Cisco MDS 9000 Family CLI Configuration Guide
30-6
Chapter 30
Purpose
Enters configuration mode.
Configures the R_A_TOV value for all VSANs to be 6000
msec. This type of configuration is not permitted unless all
VSANs are suspended.
OL-18084-01, Cisco MDS NX-OS Release 4.x
Advanced Features and Concepts