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Re: [IPsec] draft-liu-ipsecme-ikev2-mtu-dect early TSVAREA review

Joe Touch <touch@strayalpha.com> Mon, 31 October 2022 15:59 UTC

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From: Joe Touch <touch@strayalpha.com>
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Date: Mon, 31 Oct 2022 08:59:20 -0700
Cc: Tero Kivinen <kivinen@iki.fi>, ipsec@ietf.org
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To: Michael Richardson <mcr+ietf@sandelman.ca>
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Subject: Re: [IPsec] draft-liu-ipsecme-ikev2-mtu-dect early TSVAREA review
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+1

> On Oct 31, 2022, at 8:37 AM, Michael Richardson <mcr+ietf@sandelman.ca> wrote:
> 
> 
> Tero Kivinen <kivinen@iki.fi> wrote:
>> My understanding is that this draft (which I have not yet properly
>> read) is solving the situation where the tunnel does not get ICMP PTB
>> messages as they are forwarding packets with DF bit set to 0, and then
>> the receiving end will see extra fragmentation happening for the
>> packets. Then the receiving end will simulate the ICMP PTB by sending
>> authenticated IKEv2 notification that tells the sending end that his
>> packets got fragmented.
> 
> While I think that the authors think they are solving this problem, I think
> that what they have created is a protocol for dealing with fragmentation
> beyond the far gateway.
> 
> --
> Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
> -= IPv6 IoT consulting =-
> 
> 
> 
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