Restarting A Domain; About Domain Manager Fast Restart; Enabling Domain Manager Fast Restart - Cisco Nexus 5000 Series Configuration Manual

Configuring Domain Parameters
You can apply most of the configurations to their corresponding runtime values. Each of the following sections
provide further details on how the fcdomain parameters are applied to the runtime values.
The fcdomain restart command applies your changes to the runtime settings. Use the disruptive option to
apply most of the configurations to their corresponding runtime values, including preferred domain IDs.

Restarting a Domain

To restart the fabric disruptively or nondisruptively, perform this task:
SUMMARY STEPS
1. switch# configuration terminal
2. switch(config)# fcdomain restart vsan vsan-id
3. switch(config)# fcdomain restart disruptive vsan vsan-id
DETAILED STEPS
Command or Action
Step 1 switch# configuration terminal
Step 2 switch(config)# fcdomain restart vsan vsan-id
Step 3
switch(config)# fcdomain restart disruptive vsan
vsan-id

About Domain Manager Fast Restart

When a principal link fails, the domain manager must select a new principal link. By default, the domain
manager starts a build fabric (BF) phase, followed by a principal switch selection phase. Both of these phases
involve all the switches in the VSAN, and together take at least 15 seconds to complete. To reduce the time
required for the domain manager to select a new principal link, you can enable the domain manager fast restart
feature.
When fast restart is enabled and a backup link is available, the domain manager needs only a few milliseconds
to select a new principal link to replace the one that failed. Also, the reconfiguration required to select the
new principal link only affects the two switches that are directly attached to the failed link, not the entire
VSAN. When a backup link is not available, the domain manager reverts to the default behavior and starts a
BF phase, followed by a principal switch selection phase. The fast restart feature can be used in any
interoperability mode.

Enabling Domain Manager Fast Restart

To enable the domain manager fast restart feature, perform this task:
OL-xxxxx-xx
Purpose
Enters configuration mode.
Forces the VSAN to reconfigure without traffic
disruption.
Forces the VSAN to reconfigure with data traffic
disruption.
Cisco Nexus 5000 Series NX-OS SAN Switching Configuration Guide
Information About Fibre Channel Domains
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