Standby Router

Unanswered Question
Aug 4th, 2008

Is it possible to connect two routers, for redundancy purposes,with the same T1, each router having a mirror configuration. One of the routers should be actively using the T1 while the other is on standby waiting for the active to fail.

I have this problem too.
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rkhalil Mon, 08/04/2008 - 09:02

You must use HSRP:

Config example:

Router A(active):

hostname RouterA

!

interface ethernet 0

ip address 1.0.0.2 255.255.255.0

standby 1 ip 1.0.0.1

standby 1 preempt

standby 1 priority 200

standby track serial 0

!

interface serial 0

ip address 4.2.2.1 255.255.255.252

!

Router B(stand by):

hostname RouterB

!

interface ethernet 0

ip address 1.0.0.3 255.255.255.0

standby 1 ip 1.0.0.1

standby 1 preempt

standby 1 priority

standby track serial 0

!

interface serial 0

ip address 4.1.1.1 255.255.255.252

!

Router A and B ethernet interface must be connected in the same segment.

When Serial0 fail the router B take the control and publish the virutal ip.

For more information visite:

http://www.cisco.com/en/US/docs/internetworking/case/studies/cs009.html

--

Regards,

Raul

(please rate helpful posts)

hipohoneywell Mon, 08/04/2008 - 10:31

Raul, your example doesn't help, because I need the routers to have the same IP address (mirror)on the Serial interfaces. A Y cable coming from the smart jack will go to both Serial ports.

Any other idea please?

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