Standby Preempt - Cisco Catalyst 6500 Series Command Reference Manual

Chapter 2 Commands for the Catalyst 6500 Series SSL Services Module

standby preempt

To configure HSRP preemption and preemption delay, use the standby preempt command. Use the no
form of this command to restore the default values.
Syntax Description
group-number
delay
minimum delay
reload delay
sync delay
Defaults
The defaults are as follows:
•
•
Command Modes Subinterface configuration submode
Command History Release
SSL Services Module
Release 2.1(1)
SSL Services Module
Release 3.1(1)
Usage Guidelines The delay argument causes the local router to postpone taking over the active role for delay (minimum)
seconds since that router was last restarted.
When you use this command, the router is configured to preempt, which means that when the local router
has a hot standby priority that is higher than the current active router, the local router should attempt to
assume control as the active router. If you do not configure preemption, the local router assumes control
as the active router only if it receives information indicating no router is in the active state (acting as the
designated router).
When a router first comes up, it does not have a complete routing table. If you configure the router to
preempt, it becomes the active router, but it cannot provide adequate routing services. You can configure
a delay before the preempting router actually preempts the currently active router.
OL-9105-01
standby [group-number] preempt [delay{minimum delay | reload delay | sync delay}]
no standby [group-number] preempt [delay{minimum delay | reload delay | sync delay}]
(Optional) Group number on the interface to which the other arguments in
this command apply.
(Optional) Required if either the minimum, reload, or sync keywords are
specified.
(Optional) Specifies the minimum delay in delay seconds; valid values are
from 0 to 3600 seconds (1 hour).
(Optional) Specifies the preemption delay after a reload only.
(Optional) Specifies the maximum synchronization period in delay seconds.
group-number is 0.
delay is 0 seconds; the router preempts immediately. By default, the router that comes up later
becomes the standby router.
Modification
Support for this command was introduced on the Catalyst 6500 series
switches.
The command mode for this command was changed from Proxy-VLAN to
Subinterface.
Catalyst 6500 Series Switch SSL Services Module Command Reference
standby preempt
2-105