View Full Version : Mac addresses with dhcp server

Sep 11, 2008, 08:11 AM
ok so what i want to do is set up a list of mac address to a dhcp range. i already have the mac address set up to static ip's but was wondering instead to be able to set up a dhcp range and have to ability to just add in mac addy's when i need to. and i want to set up 2 seperate dhcp servers on the same net work.

basically if your mac address is in our network it will get one range of ip's and if it is not then it will get another.
well i guess i am asking is. is it possible and how do you do it.


Sep 15, 2008, 04:52 PM
Just set each DHCP server with different ranges, and one of them will handle the DHCP reservations. So lets say is your router and dhcp server and is your second dhcp server you could leave .2 - .20 or whatever open for reservations and then set the range on the .1 server to be .21-.100 and the second .101-.254 or whatever you want...not sure if that's what your really asking for though.

Sep 17, 2008, 02:29 PM
As stated above, your two DHCP servers should have non overlapping pools.

For restrictions into the one pool, in a normal DHCP server, you would put together a group of your hosts:

group {
host machine1 { hardware ethernet <enter mac here separated by colons>; }
host machine2 { hardware ethernet <enter mac here separated by colons>; }

, then use the

deny unknown-clients;

directive in dhcpd.conf.

Sep 26, 2008, 01:02 PM
sort of not really. i guess i want to have 2 different dhcp servers running different inhouse ips.

server one has a set ip range of -
and any computer can get this.

server two -
but. i want this range to give out a number only if the computer has a mac address in a pool of address.
so if x mac addy was in the list it will get a ip from this dhcp set.
does this make since?

thanks again

Sep 26, 2008, 07:47 PM
The problem may arise in that if the client may get two offers if it from both DHCP servers (for example, if it is an authorize MAC in the restricted pool).

I'd run one DHCP service and configure one pool for one group, and one pool for the other.

Sep 26, 2008, 08:22 PM
well one pool should not have any mac address in it. thanks for the help. i have not got a chance to try it out yet. hopefully next week i will have more time.

Sep 26, 2008, 08:24 PM
well one pool should not have any mac address in it.

Correct. Associate one pool with the group specified, and one pool for the one without any MAC's defined. Run this under one DHCP service.