Forcing A Failover - Cisco ACE-4710-K9 Administration Manual

Configuring Redundancy

Forcing a Failover

Cisco 4700 Series Application Control Engine Appliance Administration Guide
7-24
You may need to cause a switchover when you want to make a particular context
the standby (for example, for maintenance or a software upgrade on the currently
active context). If the standby group member can statefully becoming the active
member of the FT group, a switchover occurs.
To cause a switchover, use the ft switchover command in Exec mode. To use this
command, you must disable preemption by using the no preempt command. For
information on the preempt command, see the
section.
The syntax of the ft switchover command is:
ft switchover [group_id] [force]
The arguments and options are:
group_id—(Optional) Identifier of the FT group. Enter the ID of an existing
•
FT group as an integer from 1 to 20.
force—(Optional) Causes a switchover while ignoring the state of the
•
standby member. Use this option only when the FT VLAN is down.
The ft switchover command exhibits the following behavior, depending on
whether you enter the command from the Admin context or a user context:
Admin context—If you specify an FT group ID, then the FT group specified
•
by the group ID switches over. If you do not specify a group ID, then the
Admin context switches over.
User context—Because you cannot specify an FT group ID in a user context,
•
the context in which you enter the command switches over.
For example, to cause a failover from the active appliance to the standby appliance
of FT group1, enter:
host1/Admin# ft switchover 1
This command will cause card to switchover (yes/no)? [no] yes
host1/Admin#
Chapter 7 Configuring Redundant ACE Appliances
"Configuring Preemption"
OL-11157-01