Re: OpenTransit (france telecom) depeers cogent

[Michael Sinatra <michael () rancid berkeley edu>]

John van Oppen wrote:
> All,
>
>
> Here is an output of show ip bgp regexp _5511_ on my cogent facing router (ie with a full cogent feed)...    Most of 
> the prefixes with best paths that are not through cogent don't exist in my cogent route feed at all (even via a non 
> FT path).   It looks like things are still a bit wonky.
>
> http://as23265.net/cogent.txt
>
> Thanks,
> John van Oppen
> PocketiNet Communications
> AS23265
>
>
> -----Ursprüngliche Nachricht-----
> Von: Patrick W. Gilmore [mailto:patrick () ianai net] 
> Gesendet: Sunday, April 17, 2005 10:26 PM
> An: nanog () merit edu
> Cc: Patrick W. Gilmore
> Betreff: Re: OpenTransit (france telecom) depeers cogent
>
>
>
> On Apr 17, 2005, at 11:16 PM, Patrick W. Gilmore wrote:
>
>
> > On Apr 17, 2005, at 10:49 PM, John van Oppen wrote:
> >
> >
> >
> > > As a cogent customer, I still see no routes to 217.167.0.0/16 (the
> > > route that holds www.francetelecom.com) via my cogent feed.
> > >
> > > That /16 also appears to be unreachable from the looking glass on
> > > cogent's website still.
> >
> > I can trace from Cogent to FT just fine.
> >
> > Haven't checked all possible end points, but my spot check shows  
> > connectivity.
>
>
> Replying to my own post, I still see some Cogent <-> FT strangeness.
>
> Tracing to www.opentransit.net works fine, but www.fracetelecom.com  
> dies on the first hop.
>
> Spot checking other IPs in FT, they seem to work.  Is it just the  
> 'fracetelecom.com' sub-network that is still not connected?
>
> Anyone have any more info?

I am seeing wonkiness too.  I have a default-free router peering
exclusively with AS174 that's not seeing routes for hosts in rain.fr and
francetelecom.com, and traces to those hosts die two hops into AS174.
The same hosts are reachable via level3 and their traces go through on
our routers that have multiple peerings.

Note that the authoritative nameservers for francetelecom.com are in
rain.fr and are not reachable via an exclusive cogent path.  Hence, I am
not able to even get DNS resolution on the cogent-only path.

michael