CentOS - Jun 2011 - OT: DHCP address pool for specific MAC manufacturer

Dear CentOS,

This is somewhat off-topic, but I do hope to implement this on
a CentOS system, so here goes...

I would like to be able to setup a dhcpd (or like) daemon to
maintain two IP address pools.  One for devices whose leading
three octets of the client MAC address are specified and the
other for all other clients.  Both pools would be a defined
range on a commmon /24 subnet. There a several static IP
devices also on this net (servers, printer, etc...).  At no
time would there be more than a dozen of the specified MAC
range devices active.

I considered splitting the /24 block into two /25 blocks and
creating a shared-network with two subnets, but that still
leaves no way to wild-card the lower 3 octets, which I cannot
know in advance.

In addition to DHCP, I've looked at DNSmasq and a few others
but no joy.  I don't see a solution that doesn't require a
significant development effort.

I'm off to think about possible doing this in perl.  I still
hope someone has already done this.

Thanks,
Ray

did something similar recently...

dhcpd.conf
--------------------------------------------------------------------------
class "VMware" { match if ( substring(hardware,1,3) = 00:50:56 ); }
subnet 10.1.1.224 netmask 255.255.255.240 {
         #other subnet specific stuff here
         pool { allow members of "VMware"; range 10.1.1.229
10.1.1.230; }
         pool { deny  members of "VMware";  range 10.1.1.236
10.1.1.237; }
}
--------------------------------------------------------------------------

On 06/22/11 21:44, Raymond Lillard wrote:
> Dear CentOS,
>
> This is somewhat off-topic, but I do hope to implement this on
> a CentOS system, so here goes...
>
> I would like to be able to setup a dhcpd (or like) daemon to
> maintain two IP address pools.  One for devices whose leading
> three octets of the client MAC address are specified and the
> other for all other clients.  Both pools would be a defined
> range on a commmon /24 subnet. There a several static IP
> devices also on this net (servers, printer, etc...).  At no
> time would there be more than a dozen of the specified MAC
> range devices active.
>
> I considered splitting the /24 block into two /25 blocks and
> creating a shared-network with two subnets, but that still
> leaves no way to wild-card the lower 3 octets, which I cannot
> know in advance.
>
> In addition to DHCP, I've looked at DNSmasq and a few others
> but no joy.  I don't see a solution that doesn't require a
> significant development effort.
>
> I'm off to think about possible doing this in perl.  I still
> hope someone has already done this.
-- 
Steven Tardy
Systems Analyst
Information Technology Infrastructure
Information Technology Services
Mississippi State University
sjt5 at its.msstate.edu