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- Xref: sparky comp.protocols.tcp-ip.ibmpc:4750 news.software.readers:1658
- Newsgroups: comp.protocols.tcp-ip.ibmpc,news.software.readers
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!mips!darwin.sura.net!convex!kemp
- From: kemp@convex.com (Phil Kemp)
- Subject: Re: Trumpet Shell for FTP Software TCP stack.
- Message-ID: <kemp.713985229@convex.convex.com>
- Sender: usenet@convex.com (news access account)
- Nntp-Posting-Host: convex1.convex.com
- Organization: CONVEX Computer Corporation, Richardson, Tx., USA
- References: <kemp.713806943@convex.convex.com> <1992Aug15.180822.26989@news.csuohio.edu> <1992Aug16.032047.11419@usenet.ins.cwru.edu>
- Date: Sun, 16 Aug 1992 17:13:49 GMT
- X-Disclaimer: This message was written by a user at CONVEX Computer
- Corp. The opinions expressed are those of the user and
- not necessarily those of CONVEX.
- Lines: 33
-
- In <1992Aug16.032047.11419@usenet.ins.cwru.edu> trier@odin.ins.cwru.edu (Stephen C. Trier) writes:
-
- >In article <1992Aug15.180822.26989@news.csuohio.edu> cowboy@trans.csuohio.edu (Syscrusher) writes:
- >>Try reducing your mss to mss=256 and reduce your rwin to rwin=256. This
- >>might help, particularly with a SLIP connection.
-
- >This is not always the best advice. The mss should definitely be in the
- >200 range, but the receive window can stay large. Making the receive window
- >as short as the MSS makes TCP very inefficient.
-
- Yea it dropped my ftp thruput about 30%. Telnet and xterm interactive
- response is a little better though.
-
- >MSS-sized windows cause TCP to degenerate into a protocol more like XMODEM
- >in which every packet must be acknowledged before the next can be sent. It
-
- But to the point, these changes made no difference in the 599 Command
- Time Out error with trumpet. Just for kicks I unloaded the PC/TCP
- kernel and fired up the trumpet that includes the stack. No problem
- works just fine. With the PC/TCP stack loaded I looked for some
- interrupt contention but could find none. I did notice however that
- when I start up trumpet I don't get any characters output to the
- modem. The PC/TCP stats also show that no packets have been sent or
- received.
-
- Any ideas?
- PK
-
- --
- Phil Kemp, Systems Engineer Voice:(403)-233-2815
- CONVEX Computer Canada Ltd. Fax:(403)-261-2029
- Calgary, Alta. Internet:kemp@convex.com
-
-