home *** CD-ROM | disk | FTP | other *** search
- Path: news.onramp.net!usenet
- From: nezsez@onramp.net
- Newsgroups: alt.winsock.trumpet,alt.winsock,comp.dcom.modems
- Subject: Re: My ISP's winsock settings?
- Date: Mon, 19 Feb 1996 14:56:31 GMT
- Organization: On-Ramp; Individual Internet Connections; Dallas/Ft Worth/Houston, TX USA
- Message-ID: <4ga313$1br@news.onramp.net>
- References: <4g38o9$mk5@zoom2.telepath.com>
- NNTP-Posting-Host: lub04.onramp.net
- X-Newsreader: Forte Free Agent 1.0.82
-
- Yes those settings are strange, even for an ethernet connection those
- settings will result in less than optimal results. If your on a
- dialup account, using a modem, then you should try MTU =576 and thus
- MSS=536 (40bytes less than the total packet size of 1500 to compensate
- for the ppp header) Rwin should be set to 4096 if your transferring
- big files, but this will *appear* to be slower at your end cause it
- allocates more resources for the transfers etc. I prefer 2048 which
- allows me to cancel quicker because it checks for event updates
- quicker ( mouse clicks, keypresses etc etc).
- I work for two ISP's, and have played with these settings on many os's
- and machines, including sun servers and other ethernet connections.
- Although some of the information in the sources you site are
- theoretically true, i've noticed that they don't mention a lot of
- significant variables. 1500 works fine for 14.4 and 28.8 on win95 and
- Mac 7.5 +, but on one system i use, win 3.1 users will get "Locks"
- with that setting....so how the os handles various procedures is
- important too.
- The idea here is to use the largest MTU/MRU possible without having to
- "fragment" the packets, which slows you down marginally. You could
- also try MTU = 1006 and MSS=966.....some of my customers handle this
- fine, but many don't.
- If you are sure your provider has enabled default PPP or Van
- Jacobsens' header compression, than you can set the MSS to 3,5, or 8
- less than MTU.
-
- michael@intellisys.net wrote:
-
- >I recently asked my ISP what his winsock settings were so I could try
- >to avoid packet fragmentation, maximize file transfers, etc. They
- >E-mailed me the following:
- >MTU: 1500
- >MSS: 212
- >RWIN: 848
-
- >From what I've read (on Curt's High Speed Modem FAQ and Al's Winsock
- >Tuning FAQ) these settings seem a little odd to me. I'm no expert by
- >any means, but it sure would be nice to hear from someone who is (AL?
- >Curt? Anybody?) My Trumpet version 2.1f settings are:
- >MTU: 1500
- >MSS: 1460
- >RWIN: 8195
-
- >Should I leave mine alone or change them to my ISP's settings?
- >Thanks.
-
- >Michael B. Kintner
- >michael@intellisys.net
- >This space reserved for an appropriately
- >witty, thought provoking, and currently
- >undetermined signature file.
-
-
-
-