From: MADMAN (dave@interprise.com)
Date: Thu May 08 2003 - 15:31:04 GMT-3
lg01 wrote:
> Hello Group,
>
> If I have 2 ethernet interfaces routers configured with HSRP, is it necessary to have the "preempt" option on the 2nd (lower priority router)?
>
> Say RouterA
>
> int eth0
> ip address 192.168.1.1 255.255.255.0
> standby 1 ip 192.168.1.10
> standby 1 priority 200
> standby 1 authentication cisco
> standby 1 preempt
>
>
> And on RouterB
>
> int eth0
> ip address 192.168.1.2 255.255.255.0
> standby 1 ip 192.168.1.10
> standby 1 priority 150
> standby 1 authentication cisco
> standby 1 preempt ----- Is this needed?
>
> The logic I am thinking is that since RouterB has a lower HSRP priority, if RouterA is offline, it will become the primary router. But if RouterA is online, it will always be on Standby anyway, so I'm not sure whether there is any need for this.
>
> Any input / advice would be greatly appreciated.
>
There is where you are incorrect. Without preempt once the higher
priority link comes back online it will not switchover. Preempt is nice
so that you know who is active when everything is normal.
dave
> Regards,
> H.
>
>
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-- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367"Government can do something for the people only in proportion as it can do something to the people." -- Thomas Jefferson
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