Ben Kaduk's Transport Comment 28

[LPardue]

@kaduk said:

Section 13.2.5

When the measured acknowledgement delay is larger than its
max_ack_delay, an endpoint SHOULD report the measured delay. This
information is especially useful during the handshake when delays
might be large; see Section 13.2.1.

I'm not sure I understand when this delay would not be reported even in
the absence of this guidance. Is the idea that you should specifically
send an ACK with Largest Acknowledged corresponding to the highly
delayed packet, even if you could send an ACK with a larger Largest
Acknowledged (but lower delay)?

[martinthomson]

This is to address the implication that max_ack_delay is a limit on the value of the field, as opposed to what it is (which is several things that are quite subtle and addressed well in -recovery, so I won't repeat them).

No action proposed here.