Re: [nsp] HSRP timers

From: Dennis Opacki (dopacki@adotout.com)
Date: Wed Feb 28 2001 - 10:05:00 EST


On Wed, 28 Feb 2001, Edward S. Desouza wrote:

> Hi Martin,
> HSRP works fine with the following timers :
> hello 1 sec
> holdtime 2 sec
>
> I have seen the standby router take over with a max of
> 3 ping drops .
>
> With a hello of 1 sec and a holdtime also of 1 sec,
> HSRP active and standby router election occurs even
> when the active router is not down. This results in
> packet losses.
> Thus the minimum configurable time that I have seen to
> work is :
> Hello 1 holdtime 2
>
>
> Rgds,
>
> Edward

Be careful, however, and do thorough lab testing prior to putting such low
hello/hold times into production. I have seen situations where a busy
switch has caused wild thrashing of HSRP pairs with low timer values.

-Dennis



This archive was generated by hypermail 2b29 : Sun Aug 04 2002 - 04:12:30 EDT