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Cannot Find the DHCP Server SBS 2011

Posted on 2013-05-30
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Last Modified: 2016-11-23
I have a SBS 2011 Server (running on a Dell PowerEgde T310). This morning we had critical ISP issue resulting in some downtime. After the Internet Connection has restored I cannot via the DHCP or DHCP leases via the DHCP MMC or adding the DHCP service to an MMC console. On opening the DHCP window I can see the Server Name. When I click on the Server I receive a Cannot find the DHCP Server error message.

This is not a migration, Server has been online for over a Year.

So far I have:

Disable the NIC and re-enabled. (Single NIC).
Rebooted the Server.
Ran the Connect to the Internet Wizard (Wizard found the Router and Server IPs)
Manaully restarted the DHCP service (Service is Running).
Reviewed the Event Logs (no indications in the Event Logs).
Unathorise the DHCP Server and re-added the Server.

LAN users are still receiving IP Addresses.

Just wondering if anyone has come across this before and if they have a fix.
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Question by:brianquin
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LVL 7

Expert Comment

by:peea
ID: 39207664
Is the SBS server itself using a static IP address?

How many roles does the SBS server have except the DHCP server?
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LVL 38

Expert Comment

by:Philip Elder
ID: 39207793
Check the router. Is DHCP enabled there?

If yes, then DHCP services on SBS will not work.

To fix, run the Fix My Network Wizard in the SBS Console.

Philip
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Author Comment

by:brianquin
ID: 39207831
Hi peea,

Server has a Static IP address (double checked).

Server Roles (installed):

AD DS
DNS
File Server
Web Server
Network Policy and Access Services
WSUS
Application Server
AD CS

All the standard roles for an SBS 2011 server. No additional roles have been installed. Issue has just started this morning with the Internet Connection issue.
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Author Comment

by:brianquin
ID: 39207866
Checked the Router/ Firewall. No DHCP running. Router relays DHCP from server.
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Author Comment

by:brianquin
ID: 39207880
The Fix My Network Wizard doesnt find any issues. The Connect to the Internet Wizard also finds the Router and Server IPs without manual input. The DHCP service is running (looking as the Services). If the service was not running I would expect the SBS Console to be throwing up errors also. Strange one.
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LVL 38

Expert Comment

by:Philip Elder
ID: 39207909
Start --> type - DHCP --> CTRL+SHFT+ENTER

Does the service show up correctly?

Do an Ipconfig /release && ipconfig /renew on a desktop. Does it get an IP?

ipconfig /all on that machine and post the results please.

Philip
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Author Comment

by:brianquin
ID: 39208255
Hi Philip,

The error still remains using the Start --> type - DHCP --> CTRL+SHFT+ENTER

Running an IPConfig on a LAN workstation renews the IP Address. I have attached an IPCONFIG from a Client Workstation (IPCONFIG-Clinet). I have also attached the results after running an ipconfig /release and /renew on a workstation (IPCONFIG_ALL_Client). The workstations are getting IP Addresses from the DHCP server.

Note I have changed the Domain Suffix and MAC addresses in the txt files.

Thanks for the help with this Philip, much appreciated.
IPCONFIG-Client.txt
IPCONFIG-ALL-Client.txt
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LVL 38

Expert Comment

by:Philip Elder
ID: 39208314
Is SBS at .3?

Philip
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Author Comment

by:brianquin
ID: 39208356
Yes, Server IP is 10.0.14.3 and DG at 10.0.14.2. It has me scratching my head. Everything appears to be working fine (Exchange, OA, VPN, etc).
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LVL 38

Expert Comment

by:Philip Elder
ID: 39208379
IPv6 still enabled on the server?

Could you post an IPConfig /all for the server please?

Philip
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Author Comment

by:brianquin
ID: 39208403
IPv6 is enabled on the NIC. Attached is the ipconfig /all for the server. Again I have edited certain information in the txt file(Server Name, Domain Suffix).
IPCONFIG-All-Server.txt
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Author Comment

by:brianquin
ID: 39208697
OK, just ran the Fix My Network Wizard and got a DHCP is not configured correctly message. Let the wizard fix the issue and the problem still remains. The SBS console now reporting Network Router not found error. This is starting to get annoying now.
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Accepted Solution

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brianquin earned 0 total points
ID: 39215068
Ok, just figured it ok. The issue was caused by Eset Nod32. I uninstalled nod and I can now view the dhcp console. For reference the eset nod version was 3.0.695, think i will install version 4 or 5 and see how that works.
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Author Closing Comment

by:brianquin
ID: 39228404
Right answer
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