RE: AS PATH

From: Scott Morris (swm@emanon.com)
Date: Sat Jun 12 2004 - 10:36:05 GMT-3


If you want to take into account the pre-pending of an ACL, you would
associate the "+" character, which is "one or more of the preceding value".
Don't forget to create a character class though with ().

If you put 10+ by itself, that only treats the "0" as "one or more", so 10,
100, 1000, 10000 would match.

If you do (10)+ that will treat "10" as the thing to repeat. So whether my
as-path has 10 or 10 10 10 10 10 doesn't matter.

HTH,

 
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, CISSP,
JNCIP, et al.
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
swm@emanon.com/smorris@ipexpert.net
http://www.ipexpert.net
 
 

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Richard Dumoulin
Sent: Saturday, June 12, 2004 9:19 AM
To: 'ccielab@groupstudy.com'
Subject: AS PATH

Some time ago, someone posted a link where an example of as-path access-list
which embraced a neighbor AS plus its directed customers was shown.
This acl did take into account prepending from those AS's.

If anyone conserves this post would he send it again please ? I 've
searched the archives but in vane,

Thanks

--Richard

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