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DPLPMTUD fixes #3606

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merged 3 commits into from May 1, 2020
Merged

DPLPMTUD fixes #3606

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8e68ce6
DPLPMTUD fixes
martinthomson Apr 28, 2020
2c874dc
More explicit 'probe for the MTU'
martinthomson Apr 28, 2020
cb6d26c
Helpful tweak to existing text
martinthomson Apr 29, 2020
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15 changes: 8 additions & 7 deletions draft-ietf-quic-transport.md
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Expand Up @@ -3745,13 +3745,14 @@ correct endpoint. However, only long header packets ({{long-header}}) contain
source connection IDs, and long header packets are not decrypted or acknowledged
by the peer once the handshake is complete.

One way to construct a PMTU probe is to coalesce (see {{packet-coalesce}}) a
Handshake packet ({{packet-handshake}}) with a short header packet in a single
UDP datagram. If the UDP datagram reaches the endpoint, the Handshake packet
will be ignored, but the short header packet will be acknowledged. If the UDP
datagram causes an ICMP message to be sent, the first part of the datagram will
be quoted in that message. If the the source connection ID is within the quoted
portion of the UDP datagram, that could be used for routing.
One way to construct a probe for the path MTU is to coalesce (see
{{packet-coalesce}}) a Handshake packet ({{packet-handshake}}) with a short
header packet in a single UDP datagram. If the UDP datagram reaches the
endpoint, the Handshake packet will be ignored, but the short header packet will
be acknowledged. If the UDP datagram causes an ICMP message to be sent, the
first part of the datagram will be quoted in that message. If the the source
connection ID is within the quoted portion of the UDP datagram, that could be
used for routing.


# Versions {#versions}
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