Date: Sat, 22 Mar 2003 11:01:04 -0600 From: Jon Hamilton <hamilton@pobox.com> To: Dan Langille <dan@langille.org> Cc: mobile@FreeBSD.ORG Subject: Re: static IP via DHCP and multiple NICs Message-ID: <20030322170104.GA80709@woodstock.nethamilton.net> In-Reply-To: <3E7C4E05.32696.1447B082@localhost>
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Dan Langille <dan@langille.org>, said on Sat Mar 22, 2003 [11:50:29 AM]:
} When it comes to laptops, my house has two. Between them, they have
} four NICs; two wireless, and two wired.
}
} I know how to configure DHCP so that a given IP address and hostname
} is assigned based upon the mac address. Here's the example:
}
} host joe {
} hardware ethernet 08:00:2b:4c:29:32;
} fixed-address joe.fugue.com;
} }
}
} What I'd like to do is allow the above box to use any of four NICs,
} yet always get the same fixed address.
}
} Perhaps I should just assign one wireless NIC and one wired NIC to
} each box and assume they are always with that box.
No need; this can be done fairly easily. Configure each of your laptops
to send an identifier in the DHCP request. If you're using dhclient, you
can place in /etc/dhclient.conf:
send dhcp-client-identifier "laptop1";
Then on the DHCP server, you can use a declaration like:
group {
use-host-decl-names on;
host laptop1.yourdomain.net {
option dhcp-client-identifier "laptop1";
option host-name "laptop1";
fixed-address laptop1.yourdomain.net;
}
}
You may want to use a little more imagination in choosing the names, but
that's the general idea.
--
Jon Hamilton
hamilton@pobox.com
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