[153243] in North American Network Operators' Group
Re: IPv6 day and tunnels
daemon@ATHENA.MIT.EDU (Joe Maimon)
Sun Jun 3 22:20:42 2012
Date: Sun, 03 Jun 2012 22:19:57 -0400
From: Joe Maimon <jmaimon@ttec.com>
To: Cameron Byrne <cb.list6@gmail.com>
In-Reply-To: <CAD6AjGQOgh-_Jpi9YQWePVyB6bZGDyVwEjn93so4_FVJ4NSU7Q@mail.gmail.com>
Cc: North American Networking and Offtopic Gripes List <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Cameron Byrne wrote:
>>
>
> #1 don't tunnel unless you really need to.
Tunnels are ipv4 only now?
>
> #2 see #1
>
> #3 use happy eyeballs, http://tools.ietf.org/html/rfc6555, Chrome has
> a good implementation, but this does not solve MTU issues.
Because the initial connections are made just fine.
PMTUD with probing should work, but does not seem to. Probably a (lack
of) deployment issue.
>
> #4 MSS hacks work at the TCP layer and still work regardless of IPv4 or IPv6.
But the equipment needs to support it. Again IPv6 lags.
>
> #5 According to the IETF, MSS hacks do not exist and neither do MTU
> issues http://www.ietf.org/mail-archive/web/v6ops/current/msg12933.html
Thanks for that. I expect soon tunnels wont either.
>
> PSA time: Please use http://test-ipv6.com/ and pass this good advice
> around to the people you know.
Excellent site/tool.
>
> Thanks,
>
> Cameron
>
>
Thank you.
Joe
