In your letter dated Sat, 16 Apr 2011 15:28:09 +0200 (CEST) you wrote:
>On Sat, 16 Apr 2011, Philip Homburg wrote:
>
>> PMTU blackhole detection seemed so obvious to me, that I never bothered to
>> find out if there was an RFC specifying that it should be done.
>
><http://tools.ietf.org/html/rfc4821> is what you're looking for I guess?

I guess so. I wonder why google couldn't find it. 

I'm not sure I like their approach. I'd prefer to treat PMTU blackholes as
an exception but they treat it as the normal case.

But I guess that a node requirements RFC should refer to it.


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