BGP route filters

From: balaji.balakrishnan (balaji.balakrishnan@swift.com)
Date: Tue Feb 11 2003 - 15:51:30 GMT-3

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Hi Group,

This is about using extended access-list to filter bgp routes instead of prefix-list . For
example, if you want to permit only 10.132.0.0/16 and filter more specific routes, I believe the access-list should be

permit ip 10.132.0.0 0.0.255.255 host 255.255.0.0

But, can anyone explain me, how to interpret the following access-list entries,
permit ip 10.0.0.0 0.255.255.255 host 255.255.255.255
permit ip host 172.12.10.208 host 255.255.255.252
deny ip 172.12.10.0 0.0.0.255 any

Rgds,
Bala.
.

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