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Rephrase text in PLPMTUD #1337

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May 4, 2018
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Rephrase text in PLPMTUD #1337

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Rephrase text in PLPMTUD
janaiyengar May 4, 2018
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ian's comments
janaiyengar May 4, 2018
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13 changes: 6 additions & 7 deletions draft-ietf-quic-transport.md
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Expand Up @@ -2074,7 +2074,7 @@ describes the format and semantics of the core QUIC frame types.

## Variable-Length Integer Encoding {#integer-encoding}

QUIC frames use a common variable-length encoding for all non-negative integer
QUIC frames commonly use a variable-length encoding for non-negative integer
values. This encoding ensures that smaller integer values need fewer octets to
encode.

Expand Down Expand Up @@ -3087,12 +3087,11 @@ actually lost.
### Special Considerations for Packetization Layer PMTU Discovery


The PADDING frame provides a useful option for PMTU probe packets that does not
exist in other transports. PADDING frames generate acknowledgements, but their
content need not be delivered reliably. PADDING frames may delay the delivery of
application data, as they consume the congestion window. However, by definition
their likely loss in a probe packet does not require delay-inducing
retransmission of application data.
The PADDING frame provides a useful option for PMTU probe packets. PADDING
frames generate acknowledgements, but they need not be delivered reliably. As a
result, the loss of PADDING frames in probe packets does not require
delay-inducing retransmission. However, PADDING frames do consume congestion
window, which may delay the transmission of subsequent application data.

When implementing the algorithm in Section 7.2 of {{!PLPMTUD}}, the initial
value of search_low SHOULD be consistent with the IPv6 minimum packet size.
Expand Down