EIGRP ACL

Unanswered Question
Nov 12th, 2008

Hello,

I want to block the redistribution of the 172.16.0.0/16 to the neighbor routers. Important is that I only wnat to block the 172.16.0.0/16 (supernet) but not subnets like 172.16.1.0/24, 172.16.2.0/24 and so on.

I am not quite sure which acl statement to use.

router eigrp 1111

distribute-list out 20

access-list 20 deny 172.16.0.0 0.0.0.0

access-list 20 permit any

Will this do the intented?

thank you for your help in advance.

Best regards,

Andreas

I have this problem too.
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Edison Ortiz Wed, 11/12/2008 - 18:38

Andreas,

To take into account subnet information, I much rather use prefix-list over ACL.

ip prefix-list NET172 deny 172.16.0.0/16

ip prefix-list NET172 permit 0.0.0.0/0 le 32

HTH,

__

Edison.

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andreas.plaul Mon, 11/17/2008 - 17:26

Hello,

thank you for your input and I managed to do it with the access lists.

Best regards,

Andreas

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