Win2k8 DHCP - multihomed NIC

I have a server, with 2 IPs on one NIC, one is 192.168, the other is 172.16.  It's gateway is 192.168.0.1 -- dedicated to this server.  All other clients go out 172.16.0.1.

DHCP is configured with a 172.16 scope for the other clients.  However, no one is getting an IP, even though the server sees the broadcasts (per dhcp stats).

The 'bindings' show 192.168.0.x, the IP of the server.  There is nothing showing the 2nd IP bound to the nic of 172.16.

(All clients can access the server just fine)

How can I get the DHCP server to hand out IPs to the 2nd subnet?

LVL 9
blakogreAsked:
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.

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
rem1010Commented:
First question is why use two subnets on the same NIC?
It appears that you have a situation that is far more complex than it should be.
To achieve what it appears you want to do, you need TWO NIC cards.
One for the server to connect to the internet/router and the other for all the other clients.
You then either setup NAT on the server on the client side ONLY

The manner in which you have described, means that anyone who can access the network setup on their pc, can change to an ip that will let them get out to the internet by using the same subnet as the server, this is a bad idea.

There can ONLY be ONE DHCP server on a network, as the clients boot up and ask for an IP.

Usually the server has a fixed IP and the clients have a dynamic one.

Turn off ON of the DHCP servers and the clients will get an ip when they ask for it.

I hope this helps
0
blakogreAuthor Commented:
Weird.  Seems to be working.  thanks

@rem1010: it's a moderately complex setup.  No, 2 nic's aren't needed, as the previous answer resolved.  There's not enough traffic to even come close to justifying it.
0
blakogreAuthor Commented:
@rem1010: one dhcp server?  We often use 2 with exclusions for redundancy.  When does a DHCP server *not* have a fixed IP?  And no, they can't change to static and go out a different gateway.  That's pretty darn easy to stop with a FW rule.
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
Windows Server 2008

From novice to tech pro — start learning today.