Re: [tsvwg] I-D Action: draft-ietf-tsvwg-natsupp-16.txt Mon, 27 July 2020 12:04 UTC

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To: Michael Tuexen <>
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Thread-Topic: [tsvwg] I-D Action: draft-ietf-tsvwg-natsupp-16.txt
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Date: Mon, 27 Jul 2020 12:04:21 +0000
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Subject: Re: [tsvwg] I-D Action: draft-ietf-tsvwg-natsupp-16.txt
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Hi Michael, 

Please see inline. 


> -----Message d'origine-----
> De : Michael Tuexen []
> Envoyé : dimanche 26 juillet 2020 12:03
> À : BOUCADAIR Mohamed TGI/OLN <>
> Cc :
> Objet : Re: [tsvwg] I-D Action: draft-ietf-tsvwg-natsupp-16.txt
> > In any case, I'm afraid you will need to add details such as: amount
> of time/resources a NAT can wait for out of order fragments. You may
> reuse some of the text from RFC 6146, including the default frag
> timeout.
> >
> > * Consider this change to align with REQ-13 of RFC4787:
> >
> > OLD:
> >   When an SCTP packet has to be fragmented by the NAT function and
> the
> >   IP header forbids fragmentation a corresponding ICMP packet SHOULD
> be
> >   sent.
> >
> > NEW:
> >   When an SCTP packet has to be fragmented by the NAT function and
> the
> >   IP header forbids fragmentation, the NAT MUST send back an ICMP
> message
> >   "Fragmentation needed and DF set" to the internal host.
> Changed to
> <t>When an SCTP packet has to be fragmented by the NAT function and
> the IP header forbids fragmentation, the NAT MUST send back a
> corresponding ICMP message to the internal host.
> since it covers IPv4 and IPv6.

[Med] The wording is IPv4-specifc: "When an SCTP packet ** has to be fragmented **".

You may consider my initial wording for IPv4 + add a new sentence to cover the IPv6 case.  


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