How To Force HSRP Election Process

[CSCO12001340]

Hi !

Is there any way to force the HSRP election process ? I want to change the Standby router (A) to become Active. I am changing the priority value on B to 10 , but it is not falling over to Router B ?

Router A config

standby 1 ip 10.10.27.1

Router B config

standby 1 ip 10.10.27.1
standby 1 priority 120
standby 1 preempt
!

[Reza Sharifi]

Hi,

Since the priority is higher and preemption is enable router-b should take over.

Can you post the output of "sh standby" and the HSRP interface running configs from both routers?

HTH

[CSCO12001340]

Hi,

Currently Router B is active and Router A is standby

I know priority is higher so what i am doing is i am configuring Router B as :

standby 1 priority 10

But it is not failing over to Router A ?

[Reza Sharifi]

Is preemption enabled on router-A?

[CSCO12001340]

Nope...All standby configuration as shown above.

[Reza Sharifi]

If you want to fail over to router-A, you need to have preemption enabled

[CSCO12001340]

Hi Reza !

Oops I know it wrong ? I know what preempt is ;

For example If for any reason router B is down and preemption is enabled on router B, router A becomes Active. And when router B is back, that becomes active again.

So what you say is that I need to enable Router A for both router all the time then ?

[Reza Sharifi]

yes, you need preemption enbled

[Julio E. Moisa]

Hi

By default the priority is 100, (if you dont configure any priority it will set up 100). The active will be selected with the highest priority. 

If you want router A as active, you should have someting like:

Router A

interface f0/0
ip address 10.10.27.2 255.255.255.248
standby 1 priority 125
standby 1 preempt
standby 1 ip 10.10.27.1
no shut

Router B

interface f0/0
ip address 10.10.27.3 255.255.255.248
standby 1 priority 120
standby 1 preempt
standby 1 ip 10.10.27.1
no shut

*Take in consideration that this network should be in communication in order to activated the HSRP, it could be through routing protocols. 

Hope it is useful

:-)

[CSCO12001340]

Hi thanks but this is not what i really look for :) I am talking about in a live,production network. But anyway thanks !

[Jon Marshall]

Reza has given the answer ie. you need to enable preempt on router A.

Jon

[Julio E. Moisa]

That is correct, As Reza mentioned previously, if you configure preempt and highest priority (like 121 or more) Router A will be change the status to active. Remember this standby should has communication between them to work. In order to see the HSRP status you can execute:

show ip standby 1

I suggest change it during maintenance window and you can verify the proper functionability. 

:-)