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jsinsabaugh
Beginner

Change the AD of an EIGRP default route

Could anyone give me some advice for changing the AD of only an EIGRP distributed default route? I've tried setting up an access list but I end up changing the AD of all routes under the EIGRP process.

2 ACCEPTED SOLUTIONS

Accepted Solutions

Hello

One example, to manipulate eigrp admin distance is if you have dual paths to the same network, if is what your  asking please see example?

R1 has two routes to network 2.2.2.2  advertised by 10.1.1.2 & 10.1.1.3 routers.

sh ip route eigrp

     2.0.0.0/32 is subnetted, 1 subnets

D       2.2.2.2 [90/156160] via 10.1.1.3, 00:01:24, FastEthernet0/0

                [90/156160] via 10.1.1.2, 00:01:24, FastEthernet0/0

access-list 10 permit 2.2.2.2


router eigrp 100

distance 91 10.1.1.3 0.0.0.0 10

R1#sh ip route eigrp

     2.0.0.0/32 is subnetted, 1 subnets

D       2.2.2.2 [90/156160] via 10.1.1.2, 00:16:43, FastEthernet0/0

 

res

Paul

Please don't forget to rate any posts that have been helpful.

Thanks.



kind regards
Paul

Please rate and mark posts accordingly if you have found any of the information provided useful.
It will hopefully assist others with similar issues in the future

View solution in original post

Hello,

You could use bgp backdoor command to increase AD of eBGP prefix to 200.

http://www.ccietalk.com/2008/07/23/bgp-backdoor-routes

Best Regards

Please rate all helpful posts and close solved questions

Best Regards Please rate all helpful posts and close solved questions

View solution in original post

5 REPLIES 5
blau grana
Rising star

Hello,

You can change distance on per prefix basis for internal EIGRP routes, but this is NOT possible for EIGRP external routes. Foer external routes, you can change distance for all prefixes or none.

I assume that default route is EXTERNAL route.

Best Regards

Please rate all helpful posts and close solved questions

Best Regards Please rate all helpful posts and close solved questions

Hello

One example, to manipulate eigrp admin distance is if you have dual paths to the same network, if is what your  asking please see example?

R1 has two routes to network 2.2.2.2  advertised by 10.1.1.2 & 10.1.1.3 routers.

sh ip route eigrp

     2.0.0.0/32 is subnetted, 1 subnets

D       2.2.2.2 [90/156160] via 10.1.1.3, 00:01:24, FastEthernet0/0

                [90/156160] via 10.1.1.2, 00:01:24, FastEthernet0/0

access-list 10 permit 2.2.2.2


router eigrp 100

distance 91 10.1.1.3 0.0.0.0 10

R1#sh ip route eigrp

     2.0.0.0/32 is subnetted, 1 subnets

D       2.2.2.2 [90/156160] via 10.1.1.2, 00:16:43, FastEthernet0/0

 

res

Paul

Please don't forget to rate any posts that have been helpful.

Thanks.



kind regards
Paul

Please rate and mark posts accordingly if you have found any of the information provided useful.
It will hopefully assist others with similar issues in the future

View solution in original post

Thanks Paul - I was doing my access list incorrectly

Here was the solution

access-list 10 permit 0.0.0.0

router eigrp 10

network 10.192.5.0 0.0.0.255

network 172.22.0.8 0.0.0.3

distance 15 172.22.0.9 0.0.0.0 10

#show ip route eigrp

D*    0.0.0.0/0 [15/26880512] via 172.22.0.9, 00:06:15, Tunnel113

I just wanted to bring down the AD of that route to beat the one BGP is advertising. Thanks again.

Hello,

You could use bgp backdoor command to increase AD of eBGP prefix to 200.

http://www.ccietalk.com/2008/07/23/bgp-backdoor-routes

Best Regards

Please rate all helpful posts and close solved questions

Best Regards Please rate all helpful posts and close solved questions

View solution in original post

Could anyone please tell me what is the different between these two commands under the router eigrp section?

summary-metric 0.0.0.0/0 distance 250
distance 250 0.0.0.0 255.255.255.255

Thank you very much.