i386/857: DEC Tulip full-duplex

[map@infinitum.ch]

>Number:         857
>Category:       i386
>Synopsis:       DEC Tulip full-fuplex not working
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jun  6 12:30:03 MDT 1999
>Last-Modified:
>Originator:     Martin Portmann
>Organization:
infinitum AG
>Release:        OpenBSD 2.4/2.5
>Environment:

	System      : OpenBSD 2.5 / OpenBSD 2.4
	Architecture: OpenBSD.i386
	Machine     : i386

>Description:

    The [de] network driver has some problems with full-duplex
	mode. At least with the network card I was using:
	A recent Kingston KNE100 with a 21143 chip fabed by Intel.

	Between Firewall and internal Router (both OpenBSD boxes)
	I use a crossed patch cable. The two machines are
	able to communicate with each other but performance
	is very slow (limited to 100kb/s with ftp). With netstat
	every output packet is also marked as error (on both
	sides). 

	Thinks worked fine (up to 2500kb/s) with a hub in between.

	It did not help to specify media options with ifconfig
	(seemed to be ignored).

	I tested everything with OpenBSD 2.4 and 2.5.

>How-To-Repeat:

	Connect two computers with a crossed patch cable. Test 
	troughput with ftp.

>Fix:

	I changed network cards and everything works fine now (Intel
	EtherExpress/100+)

>Audit-Trail:
>Unformatted: