From: blodwick (blodwick@columbus.rr.com)
Date: Mon Mar 06 2006 - 23:09:00 GMT-3
_200$ says originated in AS 200
^200$ says originated in AS 200, and says it will not accept routes that
must go thru another AS before arriving at AS 200. Since AS 200 is
directly connected to AS 100 in your example this one works too.
Brian L.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
jnkmail4eva@yahoo.com
Sent: Monday, March 06, 2006 5:41 PM
To: ccielab@groupstudy.com
Subject: BGP path filtering
I have two routers A and B running EBGP,
A in domain 100 and B in domain 200.
What is the correct expression on router A to only allow routes
origianting in 200.
There are two possible answers and I wasn't sure as they both look right
..
ip as-path access-list 1 permit ^200$
or
ip as-path access-list 1 permit _200$
please correct me if I am wrong.
This archive was generated by hypermail 2.1.4 : Sat Apr 01 2006 - 10:07:38 GMT-3