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Aaron, Mark et al
In addition, if it is not there already, we could add a graph/table showing
max possible throughput for a variety of window sizes with some markers of
where typical TCP stacks place their windows.
E.g. I think Microsoft adopts 8kByte window => max thruput = 8192 x 8 / 0.6s
= 109 kbps.
Sun = ?
FTP = ?
What do you think?
Matt
Original text: (52 lines follow)
>From AARON@SMTPGATE (Aaron Falk) {[email protected]}, on 6/11/97 1:13 PM:
To: MALLMAN@SMTPGATE (Mark Allman) {[email protected]}
Cc: TCP-OVER@SMTPGATE (tcp-over-satellite)
{[email protected]}
Mark-
I just returned from MILCOM where some statements were made
at several panels I attended to the effect that TCP
throughput over a GEO is limited to under 512kbps and "this
is a fact of life that we are just going to have to live
with." This is perpetuating the misinformation that first
appeared in the infamous LA Times article. Even
misinformation, if repeated often enough, can become
de-facto reality. One of the goals of this group was provide
a forum and solicit the IETF communities assistance in order
to clarify the issue.
To that end:
Your draft lays out very nicely what you'd like to have in a
TCP that runs over satellite. I can think of two tables that
might help clarify the issues a little further for non-TCP
experts:
1) a table which lists the options recommended and whether
it needs to be implemented in the server or the client and
2) a table which identifies which recommended options are
currently available in commercial stacks with a comment
section containing any additional information about stack
implementor's plans to add them. (This might be better as an
appendix since it will certainly be dated very quickly. But
even a dated snapshot is better than pure hearsay.)
Of particular interest (in debunking the <512kbps issue) is
the status of TCP large windows. Being able to say when and
where this will be available will support the argument that
a special "satellite" TCP isn't necessary since these
changes are already being put into stacks to support gigabit
terrestrial nets.
aaron
-- Aaron Falk (310) 814-4932 TRW, Inc Electronics Systems & Technology Division [email protected]Use Proportional Font: true Previous From: HALSEM @ INTELSAT (matthew halsey) Previous To: [email protected],[email protected] Original to: MALLMAN@SMTPGATE (Mark Allman) {[email protected]} Previous Cc: [email protected] Original cc: TCP-OVER@SMTPGATE (tcp-over-satellite) {[email protected]} Attachment Count: 0
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