Re: slow ethernet

["Dom De Vitto" <dom@DeVitto.com>]

Generically, whatever the OS, and whatever the devices:

Autonegotiation does _not_ work reliably.

It may do at first, but not the next, or fifth, or thirtieth reboot.
It may even just change after a little while, and then change back
a while later - even if the cables were plugged in the whole time.

Just set the port speed/duplex (duplex is what fails) at both ends
and you'll know that it'll either work always, or not work at all.

(and I'm talking about 'quality' switches and NICs - let alone $8 ones!)

Dom
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Dom De Vitto                                       Tel. 07855 805 271
http://www.devitto.com                         mailto:dom@devitto.com
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Where do you want to go today?  Same as every day.... Windows Update.

-----Original Message-----
From: marmango [mailto:marmango@softhome.net] 
Sent: Sunday, February 15, 2004 4:29 PM
To: Dom De Vitto
Cc: misc@openbsd.org
Subject: Re: slow ethernet

Dom De Vitto wrote:
> 1) Is it ftp to or from the OpenBSD box?
> 2) What are you link settings - 100mb full duplex? Make sure it's the 
> same at what the switch thinks.
> (Try x-over cabling to another PC and set fix each end to 100meg/full)
[snip]
> 
I did x-over cable and it works OK now, through the hub too.
I don't know what was the problem, may be some bogus data in
/etc/hostname.dc0. I removed any options and now it autoconfigures.

~$ cat /etc/hostname.dc0
inet 192.168.1.2 255.255.255.0 192.168.1.255

Thanks for the suggestions.