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From: Neil Darlow <neil@darlow.co.uk>
Date: Fri, 07 Sep 2001 17:05:17 GMT
Message-ID: <20010907.17051700@ideal.darlow.co.uk>
Subject: Collisions slowing network response
To: freebsd-questions@freebsd.org
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Hi All,

I have a FreeBSD 4.3-RELENG_4_3 system that's exhibiting high network
collision rates when connected to a Debian GNU/Linux 2.2r3 system.

I have only observed these collisions since updating from FreeBSD 4.2
and more-so since upgrading hardware to 8139 NICs.

The collisions seem to occur mostly with transfer of large amounts of
data i.e. scp of small files doesn't cause many/any.

The FreeBSD system is dual-homed using a pair of 10/100 NICs one of
which connects to the Debian system via a pair of LinkSys Workgroup hubs=

and 10base2 cable.

Here are the relevant rc.conf entries and output from ifconfig. Does
anyone have any ideas how I might diagnose this?

ifconfig_rl0=3D"dhcp"
ifconfig_rl1=3D"inet 192.168.0.1 netmask 255.255.255.0"
natd_enable=3D"YES"
natd_flags=3D"-m"
natd_interface=3D"rl0"
tcp_extensions=3D"YES"

rl0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	inet6 fe80::248:54ff:fed1:cba0%rl0 prefixlen 64 scopeid 0x1=20
	inet 213.107.35.101 netmask 0xffffff00 broadcast 255.255.255.255
	ether 00:48:54:d1:cb:a0=20
	media: autoselect (none) status: active
	supported media: autoselect 100baseTX <full-duplex> 100baseTX 10baseT/U=
TP=20
<full-duplex> 10baseT/UTP 100baseTX <hw-loopback>
rl1: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
	inet6 fe80::248:54ff:fed1:ce9b%rl1 prefixlen 64 scopeid 0x2=20
	ether 00:48:54:d1:ce:9b=20
	media: autoselect (none) status: active
	supported media: autoselect 100baseTX <full-duplex> 100baseTX 10baseT/U=
TP=20
<full-duplex> 10baseT/UTP 100baseTX <hw-loopback>

Regards,
Neil Darlow.
--
1024D/531F9048 1999-09-11 Neil Darlow <neil@darlow.co.uk>
GPG fingerprint =3D 359D B8FF 6273 6C32 BEAA  43F9 E579 E24A 531F 9048


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