Re: weird IPv6 packet dropping with 6to4

[Matthias Scheler <tron%zhadum.org.uk@localhost>]

On Sat, Sep 05, 2009 at 05:35:21PM -0400, Taylor R Campbell wrote:
>    Does access to http://zhadum.org.uk/ over IPv6 work better for you?
>    My A-DSL router has an outgoing 6to4 tunnel with an MTU of 1280
>    which should avoid fragementation problems.
> 
> No.  I can fetch the main page OK, but if I attempt to download, say,
> <http://zhadum.org.uk/wp-content/uploads/2009/08/bsd-tent-large.jpg>,
> it stalls partway through just like with <http://www.ietf.org/>.

So it looks like it is neither an MTU nor an MSS issues.

> Still I see TCP retransmissions on fxp0 (external) and stf0, but not
> on ex0 (internal).

Does "tcpdump -i pflog0" report any drop packets?

        Kind regards

-- 
Matthias Scheler                                  http://zhadum.org.uk/