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Re: ISP's who where affected by the misconfiguration: start using IRR and checking your BGP updates

  • From: Patrick W. Gilmore
  • Date: Tue Feb 26 23:14:58 2008
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On Feb 25, 2008, at 11:40 AM, [email protected] 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