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Big DHCP issues

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7 replies

by elisamuel.mckenzie

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I really dont know what wnet wrong. Everything was working fine, but now my W2K3 DHCP don't want to give ip to my client...All services al working fine, no firewall on the server, the service is running fine, the server is authorized....i tried it all.
1) Unistall SP2....didn't work
2) System Restore to a week before.....didn't work
3) Remove the DHCP role, install it again, and even made an 80/20 rule for balancing....didn't work

The only method that seems to work are static IPS (obviously). I really need help. I'll appreciate any. Thanks

7 replies

by w2ktechman

is this a small network, or a larger one? Could someone have put up a rogue DHCP server? Are the clients getting an autoconfig or an invalid address?

by elisamuel.mckenzie

Is a regular network....i have 40 computers locally and 36 more that connect trough WAN (but they have their own segment, with DHCP in every branch office , so they don't have a clue whats going on this side of the network). There's the WAN router, that connects to my switch trough a firewall, and theres my switches that every computer on my LAN connects to (even the server), and theres the DSL and the T1, but they connect to the WAN1 and WAN2 Port on the firewall...so basically thats my network.

And Yeas, the clients are getting autoconfig.
About the rogue DHCP, my user aren't the technical kind. But I'll check anyways

by robo_dev

Is this a flat network? (PCs are in same broadcast domain as server)

Since Nic server? Using nic teaming or load balancing?

Are the workstations getting the 169.x.x.x address or just timing out?

Can the server ping the workstations?
can the workstations ping the server?

the first thing I would do is to plug a sniffer into the network (Wireshark is free) and see if the problem is a Layer1/LAyer 2 problem, whether the clients dhcp requests are messed up, or whether the server is not responding correctly.

by elisamuel.mckenzie

Every PC is on the same broadcast domain....bout the nic...i'm not using either of both, but i could start to. On the other hand the workstation are getting 169.x.x.x.

Yes, the server can ping the PCs, and the other way around...but just if a put the static ip (obviously).

I'm gonna try the wireshark to see what happend....

by nimmo

When you set a static address on the PC's can you contact the server? If you can't you may have a problem with cabling or your switch.

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