From: Larson, Chris (CLarson@usaid.gov)
Date: Thu May 08 2003 - 14:00:58 GMT-3
If you use preempt, the HSRP router with the lower priority will assume the
primary gateway role from any other HSRP gateways in the same group when it
comes online again. Without it, once an HSRP router has assumed the role of
primary gateway it will stay that way until another outage cause it to flip
again.
> -----Original Message-----
> From: lg01 [SMTP:lg01@myway.com]
> Sent: Thursday, May 08, 2003 11:37 AM
> To: ccielab@groupstudy.com
> Subject: HSRP question
>
> 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.
>
> Regards,
> H.
>
>
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