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.