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Date:      Sat, 23 Jun 2001 19:06:21 -0400 (EDT)
From:      Joe Clarke <marcus@marcuscom.com>
To:        Francisco Reyes <freyes@drf.com>
Cc:        "freebsd-questions@freebsd.org" <freebsd-questions@FreeBSD.ORG>
Subject:   Re: Retaining same MAC (Re: Need help configuring ethernet DSL modem)
Message-ID:  <20010623190548.E8873-100000@shumai.marcuscom.com>
In-Reply-To: <200106232259.SAA06400@mx3.drf.com>

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Yes, by default FreeBSD uses the burned-in address on the card.  This is
not something you should ever really need to worry with.

Joe Clarke

On Sat, 23 Jun 2001, Francisco Reyes wrote:

> On Sat, 23 Jun 2001 18:47:38 -0400 (EDT), Joe Clarke wrote:
>
> >However, you can use ifconfig to change your MAC address to whatever you
> >like.
>
> By default FreeBSD leaves this along right?
>
>
> >  As you can imagine, this can be quite bad if you choose one that is
> >not unique on your broadcast domain.  However, this can be useful if you
> >have to replace your ethernet card with a new one, but need to keep your
> >same MAC.  To do this, do the following while in a fairly idle network
> >state (like SU mode):
>
>
> >ifconfig <interface> ether <address>
> >arp -a -d
> >Now, when your ARP cache refreshes, your IP address will be bound to the
> >given MAC address.
>
> Thanks for the info. Will keep it handy for reference.
>
>
>
> Francisco Reyes
> Daily Racing Form
> Technical Support Manager
> freyes@drf.com
> (212) 366-7752
>
>
>
>
>


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