Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

EIGRP failover

We have two routers, A and B. THey both configure with HSRP so one is active and one is standby. If A down, B will be active. But I need help to configure EIGRP for failover. Let's say if only the circuit on Router A down but not the router, how can the router go through router B?

Thanks

Sai

3 REPLIES
Hall of Fame Super Silver

Re: EIGRP failover

Hello Sai,

>> Let's say if only the circuit on Router A down but not the router, how can the router go through router B?

This is exactly the job of a routing protocol like EIGRP no special config is needed.

You need to have EIGRP running on the link where HSRP is running.

If you want a further link between them with EIGRP running

EIGRP running on a link = network command for the IP subnet of the link under router eigrp

suppose your lan interfaces and serial links are in net 10.1.0.0/16:

You need on both routers:

router eigrp 100

network 10.1.0.0 0.0.255.255

!

Hope to help

Giuseppe

New Member

Re: EIGRP failover

Thanks Giuseppe. So after certian amount of age time, it will route to router B, if can not route to Router A?

Hall of Fame Super Silver

Re: EIGRP failover

Hello Sai,

yes EIGRP convergence is very fast in the order of few seconds (2-3) to be added to the time the router requires to detect its serial interface is down

(line protocol down needs to fail 3 keepalives :up to 30 seconds).

Notice that you can use HSRP tracking of the serial interface so that active router becomes router B if RA's serial interface fails

RA:

int fas0/0

standby 10 priority 105

standby 10 track ser0/0

standby 10 preempt

RB:

int fas0/0

standby 10 preempt

Hope to help

Giuseppe

363
Views
0
Helpful
3
Replies