HSRP between 2 ports on the same router (3825)

mayers · ‎07-29-2008

Can I configure HSRP to run between two ports on the same router? I want to implement port level Layer 3 redundancy. Typically this is done using two different routers (better) but we have a single router. I have 2 HWIC-1FE ports that will be connected to the same network. I want the devices at the other end to have a single virtual IP to point to so that when a port fails on the 3825 a new active port is elected and traffic continues to flow. I've been told that HSRP will only run on 2 or more routers.

Giuseppe Larosa · ‎07-29-2008

Hello,

you cannot use HSRP on two interfaces of a single router because you cannot put on them IP addresses of the same IP subent

you will get an error

adddress overlapping with ...

you can use IRB for this

bridge 1 route ip

int bvi1

ip address x.x.x.x y.y.y.y

int fas0/1

no ip address

bridge-group 1

int fas0/2

no ip address

bridge-group 1

this should give you redundancy with a single router

Hope to help

Giuseppe

redcoruna · ‎07-31-2008

Hello,

Also you can will do with etherchannel create a load balance and high available.

Look the follow:

http://www.xpresslearn.com/cisco/general/etherchannel-router-interfaces

Regards.