From: Nick Shah (nshah@xxxxxxxxxxxxxx)
Date: Tue Jul 09 2002 - 01:43:02 GMT-3
There are a more than couple of ways to do this... I will quote one
Say RtrA (AS1)---- RtrB (AS2)----- RtrC(AS3)
You dont want RtrB to be a transit AS for prefixes advertised from RtrA,
essentially send prefixes from RtrA with a no-export Community.
Basic idea is *not advertising* RtrA's prefixes to RtrC (and the other way
around), so you can sure find more than this way to acheive this. (Let me
know if you have any difficulty)
rgds
Nick
----- Original Message -----
From: "John White" <jan_white7@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Tuesday, July 09, 2002 1:59 PM
Subject: As Transit
> Hi Guys,
> I'm doing Cisco Aset lab.One of question is to prevent our AS from
becoming
> Transit AS, but your not allowed to use AS path filtering.
> Learning routes from outside shuould be still possible.
> Somehow I can't think of anything else. Distribution list?Community list?
> Thanks.
> Jan
>
>
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