From: swm@emanon.com
Date: Sun Apr 30 2006 - 22:09:31 GMT-3
Be careful with doing just that!
You'll get stuff originating in AS 1100, 2100, 3100, etc.
Look for "_100$" if you don't care how many other AS numbers it passed
through, but must originate in AS 100.
Scott
---- Message from "CCIE KH49279" <ccie_lab@inetiq.com> at 2006-04-30 19:23:43
------
>I would contend that you would use 100$ as your regexp.
>
>^ implies the beginning of the string so you would be looking for "100 ...."
>Instead of ".... 100"
>
>wayne
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
>Faryar Zabihi (fzabihi)
>Sent: Sunday, April 30, 2006 6:45 PM
>To: ccielab@groupstudy.com
>Subject: AS Path
>
>If the requirement is to match prefixes originated from AS 100 and after
>looking at the routing table the only ones that originate in 100 get
>directly sent to your AS. So a regexp of ^100$ would catch all
>prefixes. So as a a best lab practice, Should I use this regexp or make
>sure I cover the case of ASpath 500 400 100. It meets the requirement
>to match b/c it originated in 100 but the regexp wont catch it. Would
>proctors inject certain things into backbone routers while grading?
>
> Faryar
>
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