CLI Guide

Switch Management Commands 2281
User Guidelines
This command forces a warm restart of the stack. The backup unit takes over
as the new management unit without clearing the hardware state on any of
the stack members. The original management unit reboots. If the system is
not ready for a warm restart, for example because no backup unit has been
elected or one or more members of the stack do not support nonstop
forwarding, the command fails with a warning message. Use the standby
command to select a specific unit to act as the backup unit. Use the show nsf
command to check the NSF state. If the switch shows Warm Restart Ready as
Yes, then the master switch state is synchronized with the standby switch.
Examples
Example-No Stack Port Errors
console(config-stack)#initiate failover ?
<cr> Press enter to execute the command.
console(config-stack)#initiate failover
Management unit will be reloaded.
Are you sure you want to failover to the backup unit? (y/n) y
Example-Stack Port Errors
console(config-stack)#initiate failover
Warning! Stack errors detected on the following interfaces:
Interface Error Count
---------------- ----------------
Gi1/0/1 12
Gi1/0/3 22
NSF Status: Not synchronized
Stack port errors or lack of NSF synchronization may indicate a non-redundant
stack topology exists. Fail-over on a non-redundant topology may cause the
stack to split!
Management unit will be reloaded.
Are you sure you want to failover to the backup unit? (y/n)