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

["Patrick W. Gilmore" <patrick () ianai net>]

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