[30674] in North American Network Operators' Group
Re: Community NO-EXPORT
daemon@ATHENA.MIT.EDU (Kai Schlichting)
Wed Aug 23 10:05:54 2000
Message-Id: <4.3.2.7.2.20000823100042.032977c0@mail.conti.nu>
Date: Wed, 23 Aug 2000 10:03:21 -0400
To: "Brett Frankenberger" <rbf@rbfnet.com>,
dcahill@salesforce.com (Dave Cahill)
From: Kai Schlichting <kai@pac-rim.net>
Cc: nanog@merit.edu
In-Reply-To: <200008222336.SAA06706@rbfux.rbfnet.com>
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Errors-To: owner-nanog-outgoing@merit.edu
At Tuesday 07:36 PM 8/22/00, Brett Frankenberger wrote:
>Absent filtering, AS2 would send all three routes to it's BGP peers,
>but your NO EXPORT community will cause the two /17s to be filtered, so
>only the /16 will make it beyond AS2.
>
>
Correct me if I'm wrong, but isn't there a synchronization issue here
as well? E.g.: AS2 is transit provider, probably has bgp synchronization
on (default), and will only propagate routes to other AS's that have
made it into their IGP. The question then is: have all 3 routes made
it into AS2's IGP successfully? Only if the answer is yes, will it
actually propagate that /16.
