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Date:      Fri, 14 May 1999 20:24:49 -0700
From:      Steve Rubin <ser@tch.org>
To:        David Scheidt <dscheidt@enteract.com>
Cc:        hackers@freebsd.org
Subject:   Re: ifconfig: changing mac address
Message-ID:  <19990514202448.A9401@tch.org>
In-Reply-To: <Pine.NEB.3.96.990514220043.75420B-100000@shell-1.enteract.com>; from David Scheidt on Fri, May 14, 1999 at 10:05:59PM -0500
References:  <19990515122826.O89091@freebie.lemis.com> <Pine.NEB.3.96.990514220043.75420B-100000@shell-1.enteract.com>

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> 
> You need a switch to do this.  If your clients are on the same ethernet as 
> your server, they can only talk to one MAC address.  That means you only get 
> the bandwidth of one interface.  If you have a switch that can bond ports 
> together, you can use both cards at the same time, transparently to everybody
> but the driver and the switch.  I know that NetWare supports this, as do some
> Bay switch, and surely some Cisco stuff.  
>

Having 2 ethernet cards with the same mac address on two different ports 
of all the cisco switches I have used (1100-6500) will confuse the hell
out of them :).  I've seen it happen.   


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