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Do not allow ICMP PTB to increase PMTU #2161

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Dec 18, 2018
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Do not allow ICMP PTB to increase PMTU #2161

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Do not allow ICMP PTB to increase PMTU
igorlord Dec 13, 2018
6b3b988
Do not talk about ignoring ICMP that increases PMTU. Talk about disal…
igorlord Dec 14, 2018
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6 changes: 4 additions & 2 deletions draft-ietf-quic-transport.md
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Expand Up @@ -3173,8 +3173,10 @@ Further validation can also be provided:
use for validation (for example, the IP ID or UDP checksum).

The endpoint SHOULD ignore all ICMP messages that are not validated or do not
carry sufficient quoted packet payload to perform validation. Any reduction in
the QUIC maximum packet size MAY be provisional until QUIC's loss detection
carry sufficient quoted packet payload to perform validation.

An endpoint MUST NOT increase PMTU based on ICMP messages. Any reduction in the
QUIC maximum packet size MAY be provisional until QUIC's loss detection
algorithm determines that the quoted packet has actually been lost.


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