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From: pieris@pmb.net (Pieris Berreitter)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Network Problems with a 3COM card
Date: Sat, 10 Aug 1996 06:53:32 GMT
Organization: a2i network
Lines: 47
Message-ID: <4uhblc$cva@hustle.rahul.net>
NNTP-Posting-Host: dyn84.rahul.net
X-Newsreader: Forte Free Agent 1.0.82

I'm running BSD 2.1.5 and my network is going really slow.

I can receive data as fast as the thin-net will go, but when I send,
it chokes.  Here is a ping from the BSD system to a good Sparc 20:

bash# ping -s 2952 saturn
PING saturn.baumgart.com (204.95.75.201): 2952 data bytes
2960 bytes from 204.95.75.201: icmp_seq=0 ttl=255 time=9.083 ms
2960 bytes from 204.95.75.201: icmp_seq=1 ttl=255 time=8.503 ms
2960 bytes from 204.95.75.201: icmp_seq=2 ttl=255 time=8.515 ms
2960 bytes from 204.95.75.201: icmp_seq=3 ttl=255 time=8.614 ms
^C
--- saturn.baumgart.com ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 8.503/8.678/9.083 ms
bash# ping -s 2953 saturn

==========================================================
ok that looks fine, right? Notice I sent 2952 bytes.
check this out.  Notice the # of data bytes is just one more, 2953:
==========================================================

PING saturn.baumgart.com (204.95.75.201): 2953 data bytes
^C
--- saturn.baumgart.com ping statistics ---
31 packets transmitted, 0 packets received, 100% packet loss
bash#

===========================================================

anything over and including 2953 bytes doesn't even make it onto the
LAN! this includes FTP transfers and HTTP requests.  The inbound is
fast, I can send a large file TO the machine, but to send OUT from the
thing I get this problem.

This is a 3COM Etherlink Plus
AMD 486-66
8MB RAM
Conner SCSI HD
Adaptec 28xx


I'm thinking maybe it's the 3Com card. Can anyone shed any light on
this rather serious problem?

please cc to pieris@nova.pmb.net (my freebsd machine)