HSRP Help.

[rcasta]

Hello:

I've seen a couple of samples configuring HSRP,
rtr1
standby 100 ip 10.17.56.1
standby 100 priority 200
standby 100 preempt delay minimum 60

rtr2
standby 100 ip 10.17.56.1
standby 100 priority 100
standby 100 preempt

with the above config, I understand that "rtr1" will be the active router, though, my doubt is, how does the "preempt delay minimum 60" affect?, when it delays to 60secs? Is it useful to configure this?

kind regards,

 

[Makani]

The 60 seconds value will mean that you are giving the primary router one minute to settle down before sending LAN traffic down it again, once it has network connectivity to the outside world again.

I'd actually make the delay longer; about 180 seconds so that HSRP won't keep on going up and down if the primary router wan link is not entirely stable. The only time I wouldn't use preempt is if your secondary router (the standby) has a dial-up or low bandwidth connection which is impairing lan connectivity anyway.

 

[rcasta]

Ok, so, after Active router goes down, standby router takes control over, isn't it?

After Primary HSRP router recovers, it'll wait 60secs (or whatsoever delay is configured) to be active back again? is that it?

cheers, and thnx for your reply,