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Re: Last Call: <draft-ietf-6man-oversized-header-chain-08.txt> (Implications of Oversized IPv6 Header Chains) to Proposed Standard

2013-10-14 14:35:54
Fred,

On 15/10/2013 06:38, Templin, Fred L wrote:
...
We could have that discussion in 6man, sure, but I don't believe that
it's
relevant to the question of whether draft-ietf-6man-oversized-header-
chain
is ready.

If it messes up tunnels, then it's not ready.

That doesn't follow. See below.

This draft mitigates a known problem in terms of the current
IPv6 standards.

If that problem is also mitigated by a measure that does not mess
up tunnels, then wouldn't that be worth considering before
finalizing this publication.

The draft mitigates a known problem with communication paths that
do not include nested tunnels requiring nested fragmentation,
where the nested tunnel has to deal with an MTU <1280 *and* where
the nested tunnel goes through a firewall that wants to analyse
the complete header chain of the innermost packet.

No, I don't think it's worth considering that case before specifying
this mitigation.

     Brian

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