[102797] in North American Network Operators' Group
Re: ISP's who where affected by the misconfiguration: start using IRR and checking your BGP updates
daemon@ATHENA.MIT.EDU (Patrick W. Gilmore)
Tue Feb 26 23:12:32 2008
Cc: "Patrick W. Gilmore" <patrick@ianai.net>
From: "Patrick W. Gilmore" <patrick@ianai.net>
To: nanog@merit.edu
In-Reply-To: <20080225.174005.74732809.sthaug@nethelp.no>
Date: Tue, 26 Feb 2008 23:03:31 -0500
Errors-To: owner-nanog@merit.edu
On Feb 25, 2008, at 11:40 AM, sthaug@nethelp.no wrote:
>> I've only dealt with a handful of the bigger networks, but every
>> transit
>> BGP session I've ever been the customer role on has been filtered
>> by the
>> provider. From memory and in no particular order, that's UUNet,
>> Level3,
>> Digex, Intermedia, Global Crossing, Genuity, Sprint, Above.net, Time
>> Warner, C&W, MCI, XO, Broadwing, and a few smaller ones nobody's
>> likely to
>> have heard of.
>
> There's at least one reasonably big transit provider that does *not*
> do prefix filtering: TeliaSonera (AS 1299). They *do* perform as-path
> filtering, but the effectiveness is disputable...
No, the effectiveness is not disputable. It is guaranteed to be sub-
optimal. This is not in doubt or question.
See, as has been quoted many times, as7007.
--
TTFN,
patrick
