asked on

DHCP Redundancy and Reservations

Okay I have 2 Windows 2003 DHCP Servers. I have reservations set up for .2, .3, .4, and .5 IP Addresses. If I set up the reservations in both DHCP Servers I get an IP Policy conflict. If I set up the servers to give out different IP address ranges the reserved clients will receive the IP from the DHCP server without the reservations. The same goes if I set up reservations on one server and not on the other.

What I end up doing is diabling the DHCP server without the reservation then rebooting the client the starting the DHCP server again.

I would like to have the fault tolerance for both DHCP servers with my reservations and without having to start and stop the DHCP service.

Thank you for your help

-Russ

nprignano

you cannot have two DHCP servers with the same active scopes - there has to be an exclusion range set, otherwise both servers will hand out the same IPs, because they do not synch with one another, they only go off the information in their own database. here is a good forum post about creating dhcp redundancy:

http://www.tek-tips.com/faqs.cfm?fid=4927

nprignano

rbradberry

ASKER

but if i set a reservations on one server 1 and exclusions on server 2 then server 2 will just give the client a non excluded ip address but wont give it the reserved one.

ASKER CERTIFIED SOLUTION

micror

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

micror

I think you can do what i just mentioned with super scopes....

Andy

rbradberry

ASKER

so basically I set up my superscopes to be:

so if I set up server 1 with the first 80% and server 2 with the remaining 20%, and the reservation is given on server 1. Can I set that reservation on server 2 so that server 2 doesn't give it one of it's available IP addresses?