Subject: Re: Changing mac address?
To: None <jchacon@genuity.net>
From: Manuel Bouyer <bouyer@antioche.lip6.fr>
List: port-sparc
Date: 10/29/2000 21:19:16
On Sat, Oct 28, 2000 at 04:48:49PM -0400, jchacon@genuity.net wrote:
> Certain broken network switches (cabletron's come to mind running securefast)
> ignore the spec that a machine connected to different logical networks
> can use 1 MAC.
> 
> The cabletron's use the MAC as the key for switching traffic and ignores the
> vlan information for the ports. So what ends up happening is it rounds robins
> packets (and you see horrible packet loss) and packets on either network
> appear on the other.
> 
> That's one application I've had to change MAC's before since I couldn't get
> the switches changed out and Cabletron was convinced that a host returning
> 1 MAC for all cards was wrong. (Who cares about standards....)

How could such hardware work in a 802.1q environnement then ?
Not to mention that then you could have one machine talk to the machine
of another VLAN just by knowing its MAC addr ...

--
Manuel Bouyer, LIP6, Universite Paris VI.           Manuel.Bouyer@lip6.fr
--