Re: [quicwg/base-drafts] Rewrite Packet Size section (#2036)

[Nick Banks <[e-mail]>]

nibanks commented on this pull request.



> +Each pair of local and remote addresses could have a different PMTU.  QUIC
+implementations that implement any kind of PMTU discovery therefore SHOULD
+maintain a MPS for each combination of local and remote IP addresses.
+
+If a QUIC endpoint determines that the PMTU between any pair of local and
+remote IP addresses has fallen below the size needed to support the smallest
+allowed MPS, it MUST immediately cease sending QUIC packets on the
+affected path.  This could result in termination of the connection if an
+alternative path cannot be found.
+
+### Processing ICMP Messages to reduce the PMTU {#icmp-pmtud}
+
+PMTU discovery {{!RFC1191}} {{!RFC8201}} relies on reception of ICMP messages
+(e.g., IPv6 Packet Too Big, PTB, messages) that indicate when a packet is
+dropped because it is larger than the local router MTU. DPLPMTUD can also
+optionally utilise these messages.  This use of ICMP messages is

No clue. I think in general it is used, but I have no idea if there is any consensus or requirement. It was just a suggestion. Feel free to ignore.

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