6Bone routing problems: www.6bone.net unreachable from CSELT!

[Guardini Ivano]

Hi all,

Tomek Glod from ZET (Poland) has just fixed the IPv6 routing problem that
caused the unreachability of www.6bone.net.
Thanks Tomek!

Anyway, we still have tons of unaggregated IPv6 routes coming from IKARNET.
Is there somebody who can fix also this problem?

Bye,
Ivano


 

> ----------
> From: 	Guardini Ivano[SMTP:Ivano.Guardini@cselt.it]
> Sent: 	venerd́ 28 luglio 2000 11.41
> To: 	'6bone@ISI.EDU'
> Cc: 	Fasano Paolo; Aiello Alessandro Michele
> Subject: 	6Bone routing problems: www.6bone.net unreachable from
> CSELT!
> 
> Hi all,
> 
> during the last days I have not been able to access www.6bone.net
> using IPv6 and for this reason I am trying to figure out where the
> problem is.
> 
> First of all, if you look at our 6bone routing reports (available at
> http://carmen.cselt.it/ipv6/bgp/index.html) you can see that presently
> we have ~130 unaggregated prefixes advertised within the BGP4+ cloud.
> Most of the problems seem to come from the sites WES (USAE 
> Waterway Experiment Station, USA) and IKARNET (Student Hostels
> Wroclaw University of Technology, Poland).
> In particular IKARNET and its tens of customers seem to own IPv6 prefix
> delegations from several pTLAs: CICNET, ICM-PL, SICS and VIAGENIE.
> If handled correctly this would be an interesting case of IPv6 multihoming
> but unfortunately none of the above delegations is aggregated and
> announced through the right path. Here at CSELT I see all of them
> announced on the following AS path:
> CSELT - UUNET-UK - ATT-LABS-EUROPE - WES - IKARNET - .......
> 
> Certainly this is due to a WES or IKARNET mis-configuration but in any
> case I think that we could achieve a greater robustness of the network
> if all pTLAs implemented proper IPv6 ingress filtering towards their
> customers. In my case, if ATT-LABS-EUROPE would not re-distribute
> within the 6bone backbone the routes learned from its customers and
> not belonging to its pTLA delegation, I probably wouldn't experience this
> problem.
> 
> Also the fact that I am not able to reach www.6bone.net seems to be
> somehow related to the routing problem that I have just described. In
> fact,
> a customer of IKARNET called ZET (Zaklad Energetyczny Tarnow S.A.,
> Poland) is announcing the unaggregated prefix 3FFE:B00:C18::/48, which
> belongs to the VIAGENIE addressing space. I see it through the
> following AS path:
> CSELT - UUNET-UK - VIAGENIE - WES - IKARNET - ZET - Incomplete
> 
> But 3ffe:b00:c18::/48 is the most specific route matching the IPv6 address
> of www.6bone.net (3ffe:b00:c18:1::10). This really puzzles me in that I do
> not think that the site www.6bone.net is located in Poland.
> 
> Am I missing something?
> 
> Bye,
> Ivano
> 
>