The router is configured to preempt, which means that when the local router has a Hot Standby priority higher than the current active router, the local router should attempt to assume control as the active router. If preempt is not configured, the local router assumes control as the active router only if it receives info indicating that there is no router currently in the active state(acting as the designated router).
ex. If priority 50 router does not get notified by Active priority 150 router (link between the 2 routers cut or complete power failure) the non-active priority 50 router does not become active and your HSRP implementation worthless and/or your job.
Tom Trygar
Chris Gore wrote:
Why would you have both Routers as "Preempt"? I thought that only the
primary should have this command so that it would become the primary after
coming back on line.Chris
""Hughes, Nicholas"" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Mary,
>
> Here is a correct HSRP config
>
>
> Router A
>
> interface FastEthernet2/0
> ip address 10.10.52.66 255.255.255.240
> no ip redirects
> no ip directed-broadcast
> standby 17 priority 150
> standby 17 preempt
> standby 17 ip 10.10.52.65
>
> Router B
>
> interface FastEthernet2/0
> ip address 10.10.52.67 255.255.255.240
> no ip redirects
> no ip directed-broadcast
> standby 17 priority 200
> standby 17 preempt
> standby 17 ip 10.10.52.65
>
>
> Hope this helps
>
> Nick
>
>
>
> -----Original Message-----
> From: Mary Smith [mailto:[EMAIL PROTECTED]]
> Sent: Friday, May 26, 2000 3:02 PM
> To: [EMAIL PROTECTED]
> Subject: HSRP question
>
>
> I have 2 routers . Router B is set up for Hot Standby
> Router A is 2524, Router B is 2620:
>
> Router A configuration:
> .
> .
> int e0
> ip address 209.49.216.241 255.255.255.248
> standby 1 ip 209.49.216.245
> standby 1 preempt
> standby 1 priority 110
> no ip directed-broadcast
> !
> int s0
> ip address 206.181.61.66 255.255.255.252
> encapsulation ppp
> no fair-queue
> .
> .
> .
>
>
> Roouter B configuration:
>
> .
> .
> int f0/0
> ip address 209.49.216.245 255.255.255.248
> standby 1 ip
> standby 1 preempt
> no ip directed-broadcast
> !
> int s0/0
> ip address 206.181.61.66 255.255.255.252
> encapsulation ppp
> no fair-queue
> .
> .
>
> My questions are:
> (1). Is the above configuration correct ?
> (2). If router A go down, router B should up instantly
> ?
> (3). Can I use sam serial ip address on both router ?
>
> Thanks
>
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