Cisco Systems 6500 manual Standby preempt, 105

Chapter 2 Commands for the Catalyst 6500 Series SSL Services Module

standby preempt

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.

standby [group-number]preempt [delay{minimum delay reload delay sync delay}] no standby [group-number]preempt [delay{minimum delay reload delay sync delay}]

Syntax Description	group-number	(Optional) Group number on the interface to which the other arguments in
		this command apply.
	delay	(Optional) Required if either the minimum, reload, or sync keywords are
		specified.
	minimum delay	(Optional) Specifies the minimum delay in delay seconds; valid values are
		from 0 to 3600 seconds (1 hour).
	reload delay	(Optional) Specifies the preemption delay after a reload only.
	sync delay	(Optional) Specifies the maximum synchronization period in delay seconds.
Defaults	The defaults are as follows:

•group-number is 0.

•delay is 0 seconds; the router preempts immediately. By default, the router that comes up later becomes the standby router.

Command Modes

Command History

Subinterface configuration submode

Release	Modification
SSL Services Module	Support for this command was introduced on the Catalyst 6500 series
Release 2.1(1)	switches.
SSL Services Module	The command mode for this command was changed from Proxy-VLAN to
Release 3.1(1)	Subinterface.

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.

	Catalyst 6500 Series Switch SSL Services Module Command Reference
OL-9105-01		2-105