From: tom cheung (tkc9789@xxxxxxxxxxx)
Date: Fri Dec 28 2001 - 15:55:37 GMT-3
Community is the right answer. You will set community to no-export for this
route on AS1 for neighbor AS2. Of course you'll need to send this community
as well. This route will carry the no-export attribute in AS2 and
consequently will not be advertised to AS3.
>From: xujing@31942.org
>Reply-To: xujing@31942.org
>To: ccielab <ccielab@groupstudy.com>
>Subject: BGP non-transit question
>Date: Sat, 29 Dec 2001 1:53:40 +0800
>
>Hi, ccielab#!
>
>My student asked a bgp question. It's difficult for me. The following is
>topology:
>
>AS1---AS2---AS3
>
>He said that a bgp routing information(such as: 1.1.1.0/24) in AS1 can send
>into AS2, and can not send to AS3 from AS2. I said that you must use the
>community to complete it. But he said if AS2&AS3 are ISP and can not let
>you set "send community" in their AS, how can you do? I can not give him an
>answer. I do not think there are any solution about it. Who have more exp
>on BGP transit control?
>
>Thanks a lot!!!
>
>Best Regards!!!
>XuJing
>xujing@e-ccsi.org
>2001-12-29
>
>**********************
>CCSI:21130
>CCNP/CCDP/CNE4/CLP
>**********************
>
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