RE: bgp community list in AS path format

From: David Luyer (david_luyer@pacific.net.au)
Date: Wed Jan 12 2005 - 20:12:23 GMT-3


> I came across the following community list in AS path format ... Do
> anybody know how to interpret them??
>
> What is the difference between..
>
> ip community-list 111 permit _64621:101_.*64621:250_ and
>
> ip community-list 111 permit _64621:101_.*_64621:250_

Actually nothing, but the second is better.

If the AS didn't have 5 digits in it there would be a difference.

eg:

  ip community-list 111 permit _4621:101_.*4621:250_ vs

  ip community-list 111 permit _4621:101_.*_4621:250_

The first would also match 4621:101 64621:250 as it doesn't have
the _ marking the 'edge' of the second community. The second
wouldn't.

David.



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