[109377] in North American Network Operators' Group
Re: IPv6 routing /48s
daemon@ATHENA.MIT.EDU (Paul Timmins)
Tue Nov 18 20:07:55 2008
From: Paul Timmins <paul@telcodata.us>
To: Antonio Querubin <tony@lava.net>
In-Reply-To: <Pine.BSI.4.64.0811181345410.6400@malasada.lava.net>
Date: Tue, 18 Nov 2008 20:07:17 -0500
X-SA-Exim-Mail-From: paul@telcodata.us
Cc: nanog list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
GRE.
The problem we have (I think) is that the tunnel goes to something other
than the direct router we have the DS3 on.
The tunnel goes:
vzb->ds3 router->ethernet->another router
We aren't able to do more than a 1500 byte MTU, so when they send
packets larger than 1380 or so, the packets never make it to my end.
They get an IPv4 packet too large, and their router doesn't do anything
to either lower the MTU of the tunnel (they have changed settings on
their side but evidently not the right ones, because it's not changed
anything at all) or translate that to an IPv6 packet too big somehow, so
the packet just disappears into thin air.
-Paul
On Tue, 2008-11-18 at 13:48 -1000, Antonio Querubin wrote:
> On Tue, 18 Nov 2008, Paul Timmins wrote:
>
> > You too, huh?
>
> Is your IPv6 tunnel with vzb using GRE or 6-in-4 encapsulation?
>
> Antonio Querubin
> whois: AQ7-ARIN
