Telechat Review of draft-ietf-tcpm-rtorestart-08
review-ietf-tcpm-rtorestart-08-opsdir-telechat-wicinski-2015-10-19-00

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Review
review-ietf-tcpm-rtorestart-08-opsdir-telechat-wicinski-2015-10-19

All,

[I have reviewed this document as part of the Operational directorate's


ongoing effort to review all IETF documents being processed by the IESG. 


 These comments were written with the intent of improving the 


operational aspects of the IETF drafts. Comments that are not addressed 


in last call may be included in AD reviews during the IESG review. 


Document editors and WG chairs should treat these comments just like any 


other last call comments. ]




Status: Ready



This document describes an experimental modification to the TCP 


Retransmission Timeout (RTO) to act more aggressivly in connections that 


are short-lived or application limited.  It's well written and






The document is for both TCP and SCTCP, though primarily the TCP 


implementation is discussed. This is fine as it is experimental.




I found one thing in the introduction:

   This document describes a modified sender-side algorithm for managing
   the TCP and SCTP retransmission timers that provides faster loss
   recovery

I believe that it should be "provide" singular and not plural.

In section 4, there is this text:

   The RECOMMENDED value of rrthresh is four, as this value will ensure
   that RTOR is only used when fast retransmit cannot be triggered.
   This update needs TCP implementations to track the time elapsed since
   the transmission of the earliest outstanding segment (T_earliest).

The text is saying the implementation track time elapsed, so should it say:

"With this update, TCP implementations MUST track the time elapsed..."?

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In writing this, Spencer Dawkins YES email came through and I agree with 


the edits he proposed.




thanks
tim