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Initial PTO is 3*kInitialRtt, not 2*kInitialRtt #4262

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Initial PTO is 3*kInitialRtt, not 2*kInitialRtt #4262

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4 changes: 2 additions & 2 deletions draft-ietf-quic-transport.md
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Expand Up @@ -2254,11 +2254,11 @@ abandons its attempt to validate the path.
Endpoints SHOULD abandon path validation based on a timer. When setting this
timer, implementations are cautioned that the new path could have a longer
round-trip time than the original. A value of three times the larger of the
current Probe Timeout (PTO) or the initial timeout (that is, 2*kInitialRtt) as
current Probe Timeout (PTO) or the initial timeout (that is, 3*kInitialRtt) as
defined in {{QUIC-RECOVERY}} is RECOMMENDED. That is:

~~~
validation_timeout = max(3*PTO, 6*kInitialRtt)
validation_timeout = max(3*PTO, 9*kInitialRtt)
~~~

This timeout allows for multiple PTOs to expire prior to failing path
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