[94179] in North American Network Operators' Group
Re: 4 Byte AS tested
daemon@ATHENA.MIT.EDU (Geoff Huston)
Thu Jan 11 15:36:12 2007
Date: Fri, 12 Jan 2007 07:16:24 +1100
To: Todd Underwood <todd-nanog@renesys.com>
From: Geoff Huston <gih@apnic.net>
Cc: nanog@merit.edu
In-Reply-To: <20070111175930.GA27754@renesys.com>
Errors-To: owner-nanog@merit.edu
At 04:59 AM 12/01/2007, Todd Underwood wrote:
>all,
>
>we (renesys) saw as23456 adjacent to both 1221 (expected) and 65001
>(not), originating two prefixes:
>
>203.10.62.0/24
>and
>203.10.63.0/24
>
>paths looked like:
>
><peer> 7474 1221 65001 23456 23456 23456
>and many similar
This particular path illustrates the point - in actual fact the
trailing 3 entries were NOT instances of AS path prepending, but were
in fact 2 byte AS translations of AS 1.101, AS1.102 and AS 1.103.
Geoff
