[129289] in North American Network Operators' Group

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Re: ICMPv6 rate limits breaking PMTUD (and traceroute) [Re: Comcast

daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Thu Sep 2 01:18:49 2010

Date: Thu, 2 Sep 2010 07:18:35 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Simon Leinen <simon.leinen@switch.ch>
In-Reply-To: <aa1v9d88n4.fsf_-_@switch.ch>
Cc: John Jason Brzozowski <john_brzozowski@cable.comcast.com>,
	NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org

On Wed, 1 Sep 2010, Simon Leinen wrote:

> Your mentioning PMTU discovery issues in connection with 6to4 prompts me 
> to confess how our open 6to4 relay has probably contributed to the 
> perception of brokenness of 6to4 for quite a while *blush*.

We're also doing the same thing, 6to4 on 7600. Could you please share your 
configuration you're using on the tunnel interfaces? I thought 6to4 
traffic was only supposed to be 1280MTU?

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se


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