Contact for AS3356 (Level3) - Leak at Uk6x (AS1752)

[Daniel Austin MBCS]

Hi,

Bernhard Schmidt wrote:
> On Wed, Mar 14, 2007 at 09:59:17PM +0000, Daniel Austin MBCS wrote:
> 
> Hi Daniel,
> 
>> AS1752 accept anything from anyone over uk6x (or at least did). 
> 
> I'm well aware of that. However, accepting anything from anyone on a
> _peering_ is not the big problem (I guess most current peering session
> are run that way, occasionally protected by a max-prefix setting),
> reannouncing those paths to other peers is. Uk6x (like UPC/6830 and
> HE.net/6939) does not seem to have any understanding of
> downstream/upstream/peering status, it is just a route-server.
> Which would be fine for an exchange, if the route-server would only get
> customer routes of the participants, not a fulltable.

I agree.  We switched our AS1752 session to peering for this reason.  It 
was no use to us as a peering or transit session.
(we're no longer linked to uk6x either)

> You do get global reach by being single-homed behind 1752 today. Not
> pretty, but there are paths, so I would say you get transit by Uk6x.
> I just took a random prefix only visible behind 1752 and looked at the
> paths visible for the big IPv6 players (the selection is just my
> personal opinion):
> 
> 2001:ba8::/32		3257 2497 2500 4697 6435 9541 1752 8943
> 			6175 6830 6830 6830 1299 1752 8943
> 			3356 6175 6830 6830 6830 1299 1752 8943
> 			2914 278 6435 9541 1752 8943
> 			1273 6830 6830 6830 6830 1299 1752 8943
> 			3549 18084 2500 4697 6435 9541 1752 8943

Our problem was that we couldnt reach those single homed people behing 
BT as the serious players were only accepting BTs internal prefixes - 
assumingly, they did the same as us and converted to a peering session.
BT dont advertise "customers" to their "peering" peers.  I use 
quotations as, you quite rightly said, they appear to have no concept of 
the different peer types - most likely due to time constraints on their 
part.

I've been trying to contact UK6X single-homed-behind-BT peers for a 
while to offer transit.  I've managed to take a few off it, but we dont 
have a wide enough network to do all of them ;)


Thanks,

-- 
Daniel Austin MBCS
Managing Director
Kewlio.net Limited