>Number:         659
>Category:       port-i386
>Synopsis:       Using a 3c509 combo card and AUI, machine falls off network
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    gnats-admin (GNATS administrator)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Dec 27 22:50:05 1994
>Originator:     Greg Hudson
>Organization:
"MIT Student Information Processing Board"
>Release:        1.0
>Environment:
	
System: NetBSD glacier 1.0 NetBSD 1.0 (3C509-AHA) #0: Sun Dec 25 08:55:43 PST 1994
ghudson@glacier:/usr/src/sys/arch/i386/compile/3C509-AHA i386

This problem applies to every kernel I have tried.

>Description:
	Using a 3c509 combo card and AUI, my machine sporadically loses
	contact with the network, usually during periods of high traffic.
	The problem is not easily repeatable; however, when running video
	games over the network via X, or doing file transfers via NFS (e.g.
	while installing NetBSD), the machine regularly loses contact with
	the network.

	I can reestablish contact with the network by re-running "ifconfig"
	on the interface.  This problem does not occur on machines using
	BNC (I know of at least two machines using 3c509 cards, one of them
	definitely a combo 3c509 card, which have never experienced this
	problem).  I do not know whether this problem occurs on machines
	using UTP.

	The output of "/sbin/ifconfig -a" does not change when the machine
	falls off of the network; it always reads:

ep0: flags=9863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,LINK0,MULTICAST>
        inet 18.248.0.54 netmask 0xffff0000 broadcast 18.248.255.255
lo0: flags=8009<UP,LOOPBACK,MULTICAST>
        inet 127.0.0.1 netmask 0xff000000 
sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST>

>How-To-Repeat:
	Perform high-traffic network activities using the AUI interface of
	a 3c509 card.

>Fix:
	I do not have a fix, but am willing to run debugging code to help
	find the problem if you don't have an equivalent setup or cannot
	reproduce the problem.

>Audit-Trail:
>Unformatted: