Eigrp summary advertisement

[mazhar mahadik]

Hi,

i have a wan router as shown   s1-----ospf------R1----eigrp-------s2.

ospf is running on s1 interface and eigrp on s2 interface. i m learning many network from ospf domain ,but i m advertising  eigrp summary as default route(default route 0.0.0.0/0) to eigrp domain.

My question is can we track ospf interface before advertising eigrp summary? , eg- if s1 interface is down then eigrp will not advertise default summary route on s2 interface.

Thanks in advance.

[jgtheodor]

Hi,

Try to configure a default static route pointing out the S1 interface and then redistribute only this static route with a relevant  ROUTE MAP in the EIGRP instance. If the s1 interface is down the default route will not been inserted in routing table and will not been advertised to EIGRP domain.

I have already tried this and it works!

Of course you can use the default route with object tracking for more accurate results!

Take a look below:

router eigrp 90
redistribute static route-map DEFAULT-ROUTE

!

!

ip route 0.0.0.0 0.0.0.0 s1

!

ip access-list standard DEFAULT-ROUTE
permit 0.0.0.0
deny   any

!

!

route-map DEFAULT-ROUTE permit 10
match ip address DEFAULT-ROUTE

Hope help!

[mazhar mahadik]

Thanks John , this is execllent solution.