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-
-
- CURRENT_MEETING_REPORT_
-
- Reported by Craig Partridge/BBN
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-
-
- MINUTES
-
- The working group made progress on deciding what to do about the options
- to support large TCP windows.
-
- Key concerns were making the window size big enough so that a full
- window could fill a gigabit pipe and expanding the sequence space large
- enough that it wouldn't be consumed too fast at a gigabit.
-
- The WG made the following tentative decisions about how to deal with big
- windows:
-
- 1. The RFC 1072 window shift option will be used to expand the window
- size (everyone likes it, and implementation is a snap).
- 2. We'll create a new Urgent Pointer option so it can point to urgent
- data anywhere in the expanded window. (To use it, the URG bit is
- left off -- when the receiver processes options, it will see that
- there is urgent data).
- 3. The WG was divided among two options for expanded the sequence and
- ack space. Thankfully some folks with supercomputers offerred to
- implement both options and report back this spring. The two
- options were:
- (a) since we need an URG option anyway, steal the urgent field in
- the TCP header to get 8 more bits for each of the sequence #
- and the ack #. These would be high order bits.
- (b) don't futz with the header (note that in most cases urgent data
- is likely to be within 2**16 of the current sequence number and
- thus the urgent field is still useful). Instead, put an option
- at the end of each segment header, which contains an additional
- high order 16-bits of the sequence number and the ack number.
-
- Based on the implementation experience, the WG will decide which path to
- take.
-
- People interested in participating in the experiment should contact Dave
- Borman (dab@cray.com).
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- ATTENDEES
-
- Doug Bagnall bagnall_d@apollo.hp.com
- Dave Borman dab@cray.com
- Richard Fox sytek!rfox@sun.com
- Mike Karels karels@berkeley.edu
- Walt Lazear lazear@gateway.mitre.org
- Paul Love loveep@sds.sdsc.edu
- Gary Malkin gmalkin@proteon.com
- Paul E. McKenney mckenney@sri.com
- Don Merritt don@brl.mil
- Lee Oattes oattes@utcs.utoronto.ca
- Craig Partridge craig@bbn.com
- K.K. Ramakrishnan rama@dsmial.dec.com
- Joel Replogle replogle@ncsa.uiuc.edu
- Frank Solensky solensky@interlan.com
- Mike St. Johns stjohns@umd5.umd.edu
- Allen Sturtevant sturtevant@ccc.nmfecc.gov
- Rick Wilder rick@gateway.mitre.org
- Brian Yasaki bky@twg.com
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