EIGRP Stub Help

[boshardy1]

We are moving our retail environment to a frame relay DS-3. All our stores will be sub-interfaces. On the remote end (store side) we want to take advantage of EIGRP stubbing. I have enabled this at some test locations and still see a full routing table even though the stub looks like its working.

router eigrp 100

passive-interface default

no passive-interface Serial0/0.90

network 10.63.141.0 0.0.0.255

no auto-summary

eigrp stub summary

And the routing table for this router:

Gateway of last resort is 10.63.141.249 to network 0.0.0.0

10.0.0.0/8 is variably subnetted, 22 subnets, 3 masks

D 10.1.2.0/24 [90/10514432] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.81.179.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.81.182.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.81.181.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.81.180.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.81.128.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

C 10.63.141.248/30 is directly connected, Serial0/0.90

D 10.63.167.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.63.179.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.63.178.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.88.111.248/30

[90/10516992] via 10.63.141.249, 00:01:41, Serial0/0.90

D 10.81.114.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.88.126.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.81.118.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.81.123.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.64.106.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.88.115.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.88.112.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.64.105.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

D 10.88.117.248/30

[90/10516992] via 10.63.141.249, 00:33:55, Serial0/0.90

C 10.63.253.41/32 is directly connected, Loopback0

D 10.255.255.254/32

[90/10639872] via 10.63.141.249, 00:33:55, Serial0/0.90

D*EX 0.0.0.0/0 [170/10512128] via 10.63.141.249, 00:33:55, Serial0/0.90

I am getting my injected default route care of the stub but why do I see all the other WAN routes, stub should hide these from my readings?

[Aaron Harrison]

Hi

EIGRP stub doesn't prevent routes being advertised into the stub area - it prevents routes being advertised out of the stub area to the hub (as well as preventing the stub being queried for routes by the hub).

See this link:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s15/eigrpstb.htm#wp1021949

Below fig 1 it explains this.

It often makes sense to strip down the routing tables a little - you can use a distribute list to allow just the routes you want (maybe just a default) to be advertised to the stubs.

Regards

Aaron

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