Subject: Re: 10 Base 2 on alpha
To: schaecsn <>
From: Manuel Bouyer <>
List: port-alpha
Date: 07/08/2001 15:40:14
On Sun, Jul 08, 2001 at 06:02:38AM -0700, schaecsn wrote:
> Hi,
> I do have a question concerning the ethernet card DEC 21040 of my Alpha
> 200 4/100.
> (cavet: maybe ethernet is already running, but I can't tell because the
> ethernetcard on the other side of the network (intel-linux) is also
> making trouble. nothing sent at one side reaches the other side. sniffit
> keeps silent).
> My ethernetcard has two interfaces, 10 Base-T and 10 Base 2 (BNC). To
> avoid buying a hub I would like to use the latter interface.
> the manpage for "de" tells me that I do have a 10 Base-T and an AUI/BNC
> interface. what do the manpage mean with AUI/BNC? I don't have an AUI
> but just a BNC interface! anyway.

Usually, combo ethernet hardware have a 10baseT port, and an AUI one. 
Just add a transeiver on the board and you have 10base2. This is why
it's not possible to tell, from the software, if it's a AUI or BNC

> when using ifconfig's media option I get besides the argument "10baseT"
> also the argument "AUI" but not the argument "BNC" working (SIOCGIFFLAGS
> inet: Device not configured).
> the main question: what argument do I need for ifconfig's media type?
> AUI although I would like to use BNC?


> The Alpha 500 manual (not 200) which explains me that I have to set for
> some, but not for all, OSes the environment variable ewa0_mode at the
> >>>-prompt to some value. do I have to fiddle around with that, too?

No (exept maybe if you want to netboot)

Manuel Bouyer <>