DHCP giving out wrong IP addresses

Hi, all!  running mixed Win 2k8 & Win2k3 (both R2) servers in AD domain.  DHCP servers in question on subnet are Win2k8 (one) and Win2k3 (one).

Odd problem.  All workstations on the network are config'd to get IP addy info from one of two DHCP servers running on the network; one server has one scope, the second has a different scope.  Both are configured with the same routing and DNS server IP addresses.  DNS servers config'd in DHCP are set for x.y.y.251 and x.y.z.51 (yes, two different subnets, no routing issues between offices).

When users log into network, the DNS settings they are getting from DHCP are set for x.y.y.252 and x.y.y.253.  These were our OLD DNS servers, changed weeks ago.  Caches flushes on test workstations and DNS & DHCP servers.  On one workstation I flushes the cache, released the lease (ipconfig /release), powered the machine off, and logged back on again.  The DNS settings were for the wrong y.252 and y.253 addresses.

I'm a little lost here; any suggestions?  I have verified that there are only two DHCP servers running on this subnet (x.y.y subnet).

Thanks!
SteveB
SteveAtLSCAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Hypercat (Deb)Commented:
After the workstation gets the lease, if you run ipconfig /all, what DHCP server do you see listed in the properties?
0
SteveAtLSCAuthor Commented:
hypercat, thanks for replying.  The DHCP server shown is one of the DHCP srevers on the local subnet.

However, I found the problem, and will release all of the current leases tonight after everyone leaves.

Thanks!
SteveB
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
vivigattCommented:
If your DHCP clients are in the same subnet and if the 2 DHCP servers are not aware one of the other, I can't see how you would be able to predict which DHCP server answer what host (unless you have reservations). The 2 scopes would be in the same subnet too. But maybe I got something wrong in your question.
0
Upgrade your Question Security!

Your question, your audience. Choose who sees your identity—and your question—with question security.

Hypercat (Deb)Commented:
SteveB, it would be good if you posted the cause of your problem and the solution you found, just in case someone else with the same issue is searching for a solution on EE.

Thanks,

Deb
0
SteveAtLSCAuthor Commented:
Solution found prior to community involvement.
0
syber70Commented:
Look at the name servers listed in domain DNS, specifically under _msdcs.domain  Make sure to remove defunct name servers from there.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
DHCP

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.