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Date:      Fri, 14 May 1999 22:45:07 -0600
From:      Wes Peters <wes@softweyr.com>
To:        Greg Lehey <grog@lemis.com>
Cc:        David Scheidt <dscheidt@enteract.com>, Dan Nelson <dnelson@emsphone.com>, "Mark J. Taylor" <mtaylor@cybernet.com>, Daniel Eischen <eischen@vigrid.com>, freebsd-hackers@FreeBSD.ORG
Subject:   Re: ifconfig: changing mac address
Message-ID:  <373CFBD3.6A3E954C@softweyr.com>
References:  <19990515121747.N89091@freebie.lemis.com> <Pine.NEB.3.96.990514215106.75328A-100000@shell-1.enteract.com> <19990515122826.O89091@freebie.lemis.com>

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Greg Lehey wrote:
> 
> OK, now maybe I'm missing something here.  But an Ethernet address is
> used to identify a board.  Arp binds it to an IP address.  An IP
> address is bound to a network.  So if you're on a different network,
> you get a different IP address.  Why do you need the same Ethernet
> address?
> 
> This is very different from having two boards on the same network,
> both with the same Ethernet address.  As I observed earlier, that does
> make sense, but it's a hot standby situation.  I can't see any point
> in arranging for both of them to accept or send data.

Redundancy and throughput both.  Most switches can do this; using
two physical ports as one logical link.  Think of it as network
link striping.

-- 
       "Where am I, and what am I doing in this handbasket?"

Wes Peters                                                 Softweyr LLC
http://www.softweyr.com/~softweyr                      wes@softweyr.com


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