ip summary address eigrp not sending summary route
Hi. I have the following problem. I have my internet router redistributing the default route via EIGRP with a redistribute static. (Neighbors learn it as an external of course). Then I have a remote site, to which I only wish to send a default route as a summary address in the tunnel interface, but it seems to be ignoring the summary route, and instead learns the redistributed route with an AD of 170. Do you have any idea about this? Why is it preffering the external route? No eigrp distances have been changed in the EIGRP process.
interface Tunnel1001 description *remote site ip address 10.95.3.58 255.255.255.252 tunnel source x.x.x.x tunnel destination x.x.x.x end
Remote Site routing Table
remote_site#SHOW IP ROUTE Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route
Gateway of last resort is 10.95.3.57 to network 0.0.0.0
*omited output* D*EX 0.0.0.0/0 [170/1763328] via 10.95.3.57, 1d00h, Tunnel1001
I think the AD (250) that u given in the summary statement is the problem. Because it is higher than the AD 170 of external eigrp route. Ther router will always consider lower AD as the preferable route.
I don´t think that´s the problem. Cisco states about summary route: "anything summirized with ip summary-address eigrp AD is added with that AD into local table; and it is advertised as EIGRP 90". Thank you anyway!!!
When you redistribute routes to the same autonomous system, EIGRP ignores Administrative distance. If you check your EIGRP routing topology on your remote site, you will find a default route probably with higher metric which is generated by IP summary.
sh ip eigrp topology (on remote site to check ip summary)
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