Subject: Re: 4 port ethernet cards
To: Ted Lemon <mellon@hoffman.vix.com>
From: D'Arcy J.M. Cain <darcy@druid.net>
List: current-users
Date: 01/29/1998 21:56:02
Thus spake Ted Lemon
> It probably depends more on what you've connected it to than anything
> else. I've had some trouble with DE500 boards if I try to connect
> them directly to other DE500s or Intel EtherExpress cards with a null
> ethernet cable - it seems that their autosense algorithms clash with
> each other. If I force one card into a specific mode, everything
> starts working. As Matt (the author of the driver!) points out, if
> it's stuck in OACTIVE, it's probably autosensing.
As I said, I always force the media. The problem I was having was that
if my connectivity supplier had a problem ant the line went down, it
would fail to come back up unless I reboot. The NetBSD box worked
if it came up sensing the connection but it couldn't recover. Really
annoying when the unit is running unnatended in a cage downtown.
> Matt's driver runs on FreeBSD, NetBSD and BSD/os, so I doubt that what
> you're seeing is a NetBSD-specific problem. And you can always point
> that out to your smug FreeBSD weenie "friends" when they razz you
> about it... :')
Thanks. I'll do just that. :-)
I still have a feeling that it has something to do with the hub kluge
the other guy was doing. He was doing something like this:
------------- ---------
|4 port card| | HUB |
-|--|--|--|-- | |
| | | | | |
| | | |-------------- |
| | |----------------- |
| |-------------------- |
|-> to Internet | |
| |
-------- | |
| | | |
| A -----------------
| | | |
-------- | |
-------- | |
| | | |
| B -----------------
| | | |
-------- | |
-------- | |
| | | |
| C -----------------
| | | |
-------- ---------
I can see how this could work (it obviously won't segment the network,
of course) but I wonder if having those 3 ports on the same physical
card would introduce problems. I guess it would depend on how much
the ports were segregated functionally on the card.
--
D'Arcy J.M. Cain <darcy@{druid|vex}.net> | Democracy is three wolves
http://www.druid.net/darcy/ | and a sheep voting on
+1 416 424 2871 (DoD#0082) (eNTP) | what's for dinner.