From: Laidlaw, Patrick A. (Patrick.Laidlaw@wwt.com)
Date: Wed Dec 12 2007 - 17:45:07 ART
Mohammad the real questions is the route permitted to traverse through
other AS's or does AS 100 need to be directly connected.
The _100$ will match anything sourced from AS 100 but will allow these
routes to traverse other AS's.
The ^100$ will match anything sourced from AS 100 but will not allow
these routes to contain any other AS's. So if prepending happens IE
100 100 100 or it traverse's another as 5 10 100 then these learned
routes will be dropped.
Patrick Laidlaw
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Mohammad Saeed
Sent: Wednesday, December 12, 2007 12:04 PM
To: Cisco certification
Subject: _100$ OR ^100$
Hi,
If I have R1 in AS 50 peering with R2 in AS 100. if I want R1 to learn
routes only originated in AS100 only from R2, which as-path acl will be
correct?
ip as-path access-list 1 match _100$
OR
ip as-path access-list 1 match ^100$
route-map FIL permit 10
match as-path 1
on R1 I apply this route-map incoming to R2
Regards,
Mohammad Zahed Saeed
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