[tcpm] Request for input regarding the initial window increase

["SCHARF, Michael" <[e-mail]>]

Dear all,

according to the TCPM charter, the working group has to determine the
intended publication track for the document on increasing the initial
window by Aug. 2011.

In addition, there are some further open issues regarding an increase of
TCP's permitted initial congestion window. I tried to narrow this down
to three key questions:


Question 1: Moving forward a fixed increase of the permitted TCP initial
congestion window (draft-ietf-tcpm-initcwnd-01)?

Answer 1A: Fixed upper limit to proposed standard
Answer 2B: Fixed upper limit to experimental
Answer 3C: Something else (e. g., some adaptive scheme, or no change at
all compared to RFC 3390); this would imply a substantial change of
draft-ietf-tcpm-initcwnd-01


Question 2: Maximum permitted initial congestion window?

Answer 2A: 10 MSS for an MTU of 1500 byte as suggested by
draft-ietf-tcpm-initcwnd-01 (other MTUs are still TBD)
Answer 2B: Another value (please suggest and justify)


Question 3: Adaptive solution as an alternative?

Answer 3A: Adoption of draft-touch-tcpm-automatic-iw-01 as WG item
heading towards experimental
Answer 3B: No adoption


These questions have partly been discussed so far (e. g.,
http://www.ietf.org/mail-archive/web/tcpm/current/msg06221.html), but in
order to determine the working group consensus, additional feedback and
opinions from the group would be very helpful. This also includes the
question whether there are further possibilities to be considered.

The chairs plan to allocate some meeting time in Quebec City for this
charter item, but prior input on the list would be highly welcome.

Thanks!

Michael Scharf and David Borman
(TCPM co-chairs)