15 Aug
2002
15 Aug
'02
9:30 p.m.
* ras@e-gerbil.net (Richard A Steenbergen) [Fri 16 Aug 2002, 03:01 CEST]: [..]
IMHO AS Path filters are useless and redundant if you have proper prefix-lists.
Did you ever run into that bug in IOS where if you had `ip as-path access-list 1 permit ^(1|2|3)+_$' (where 2 and 3 would be customers of AS1 who is one of your peers), and the third number is higher than the second number? IOS seemed to optimise that case out and reject AS paths of ^1_2$ if the filter was written as ^(1|3|2)+_$. This was several years ago though. -- Niels.