Howto configure multiple MAC address with one ip-address (not at the same time) ???

[Alex Moen]

> -----Original Message-----
> From: dhcp-users-bounce at isc.org 
> [mailto:dhcp-users-bounce at isc.org] On Behalf Of Andrew Dibbins
> Sent: Thursday, June 21, 2007 3:56 AM
> To: dhcp-users at isc.org
> Subject: Howto configure multiple MAC address with one 
> ip-address (not at the same time) ???
> 
> 
> Hello,
> 
> I'm trying to configure my dhcpd server to issue my
> laptop with the same ipaddress, irrespective of
> whether I connect via wired or wireless connection,
> hence different MAC addresses (clearly not at the same
> time).
> 
> Using the the fixed address section in the dhcpd.conf
> like this:
> 
> host laptop {
>    hardware ethernet 00:14:85:2D:E0:2F;
>    fixed-address 192.168.1.19;
> }
> 
> and
> 
> host laptop {
>    hardware ethernet 00:11:25:D6:EE:91;
>    fixed-address 192.168.1.19;
> }
> 
> When starting the daemon, it barfs, line xx laptop
> already exists, I've tried combining the assignments
> into just one assignment in the config file, like
> this.
> 
> host laptop {
>      hardware ethernet 00:11:25:D6:EE:91;
>      hardware ethernet 00:14:85:2D:E0:2F;
>      fixed-address 192.168.1.19;
> }
> 
> This didn't work.
> 
> I appreciate, I could set a fixed address on the
> laptop, but I'd be forever updating it as I connected
> my laptop to many different networks thru out a week.
> 
> Is there a fix, or way round this, I would suspect
> this is a perfectly reasonable thing to want to do?
> 
> Thanks
> 
> Andy
>    
> 
> 
> 
> ======================================================
> Tel       : +44 (0)161 905 8112
> Fax       : +44 (0)870 161 7421
> Email (H) : andy_d at rapier.demon.co.uk
> Email (W) : andrew.dibbins at sun.com 
> ======================================================
> 

Andy,

All "host" statements must be unique.  So, change your lines to:

host laptop_wired {

and

host laptop_wireless{

Your config will load properly.  Not saying that this is a good idea, but it
will load and work.  You may run into multiple problems doing this, such as
router ARP table confusion and other evil things, but it will load.

Alex