Date: Mon, 17 Nov 1997 03:24:16 +0900 From: Jeong Seong Won <swjeong@woman.kitel.co.kr> To: dg@root.com Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Network connection often stops. Why ? Message-ID: <346F3A50.2781E494@woman.kitel.co.kr> References: <199711161752.JAA18425@implode.root.com>
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> > About twenty of 686 FreeBSD 2.2.1 Machine is connected
> > via FastEthernet.(Intel EtherExpress)
> > Hub is SMC tigerstack.(not a switching)
> > Problem occurs in the same way when I used SMC 9332BDT.
> > Network options MAXMEM=262144
> > Concurrent User is aboue 230 per machine.
> > Problem is that suddenly telnet session stop.
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > When this happens, all key stokes is not effective, and at last
> > conection is closed.
> > vnode, file table, mbuf, somaxconn is sufficient.
> >It seldom crashes (per two month or so).
> >Normally, when telnet session stops and is closed, the server
> >is normal. And stop at one telnet session doesn't have effect on
> >the other telnet session.
>
> This is very strange.
> Have you noticed the problem with any other methods
> of logging in - such as rlogin or perhaps ssh?
> Have you had any problems with any other TCP connections
> (ftp, for example)?
1. rlogin : It stops the same as telnet.
2. ftp : Between two fxp0. It seems to be ok.
But I think collision is too much.
*. : This problem much more often occurs when I used telnet session
across dedicated frame-relay line.
(my company has another office 200km apart from here.
and two offices are linked via 256k frame-relay by two cisco2501)
Thank you.
---- test ftp session
ftp> bin
200 Type set to I.
ftp> hash
Hash mark printing off.
ftp> put menu1.putter.tar mpt
local: menu1.putter.tar remote: mpt
200 PORT command successful.
150 Opening BINARY mode data connection for 'mpt'.
226 Transfer complete.
141045760 bytes sent in 64.65 seconds (2.08 Meg/s)
ftp>
---- part of 'netstat -i 1' during file transfter
input (Total) output
packets errs bytes packets errs bytes colls
702 0 3894433 1191 0 1308856 885
1944 0 52236 1735 0 1756141 1817
1797 0 64946 1400 0 2162948 1633
762 0 92377 1420 0 2172839 1113
799 0 71457 1570 0 2312271 1234
847 0 56098 1584 0 1963419 1185
883 0 47396 1682 0 1522724 1213
693 0 54944 1295 0 1512537 988
620 0 102042 1036 0 2395828 786
791 0 68771 1394 0 2177896 1087
920 0 59419 1655 0 1867955 1204
858 0 87879 1598 0 2563406 1329
844 0 627342 1462 0 2275711 1070
1104 0 1072901 2003 0 2303189 1398
717 0 190867 1206 0 5082679 787
688 0 100601 1157 0 2272163 754
1794 0 92633 3531 0 2010000 2814
880 0 81479 1568 0 2635020 1144
928 0 78486 1664 0 2316235 1234
1045 0 66754 1896 0 1816872 1408
836 0 73043 1488 0 2273104 1058
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