SBS - DHCP scope problems

[horaces]

Hi

I have setup a new SBS server that will replace a 2000 server. SBS server and 2000 server have different domain names. On the SBS I configured DNS and DHCP scope. Everything was running, clients were resolving correct network information. The day after I setup the SBS I got the following error in DHCP (admin tools)

Error: Cannot find DHCP server - DHCP server you speciefied cannot be located, DHCP server might be down or DHCP service might not be installed

I cannot get the DHCP server up anymore, the service starts and stops automatically. Is this because the 2000 server is still running?

Gtz

horaces

 

[PHV]

Have you disabled DHCP on the 2000 server ?
If not, you should.

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[horaces]

Hi PH

Thanks for the quick reply, I have turned off DHCP service on 2000 server but the problem remains the same. I have rebooted the new SBS without results, tried to restart dhcp service again the service went down immediately.

I was not able to reboot the 2000 server yet.

any suggestions what the problem might be?

Gtz Bert

 

[ShackDaddy]

The SBS DHCP server will automatically shut itself off if it detects another Windows DHCP server on the network. So either use DHCP on the SBS server only, or turn off DHCP on the SBS and use the other one. For your situation, it sounds like you just want to be on SBS.

Try this: instead of actually shutting off the service on the other server, try just deactivating the scope. That will make your transition quicker if your SBS server keeps from shutting down again, since the old server will actively tell clients to drop their old leases when they connect to it for renewals. Otherwise, if you just turn it off, clients will wait till their leases expire (or for you to do a release/renew) before taking a lease from your SBS server's scope.

ShackDaddy
Shackelford Consulting

 

[horaces]

disabled 2000 dhcp scope now but still nothing. SBS server does not even show in DCHP. I will leave 2000 scope down overnight and see what will happen in the morning.

Still do not understand why in the first place I was able to configure a scope on the SBS that disappeared afterwards.

update tomorrow morning

 

[horaces]

extra info:
event Viewer
Event ID 1056

the dhcp service has detected that it is running on a DC and has no credentials configured for use with dynamic DNS registrations initiated by the DHCP service. This is not a recommended security configuration . Credentials for dynamic DNS registration may be configured

 

[ShackDaddy]

That error won't prevent it from giving out addresses, as long as you've created a valid scope and activated it.

ShackDaddy
Shackelford Consulting

 

[horaces]

Hi

I finally solved the issue after finding the followin error in event log

Event ID 1053
The DHCP/BINL service on this computer running Windows Server 2003 for Small Business Server has encountered another server on this network with IP Address, x.x.x.x, belonging to the domain:


WIFI AP DHCP interferred with the SBS DHCP server, after disconnecting the WIFI AP, I could create a scope again and activate it. Clients are connecting ok. Still I think it is a strange problem.

Thanks all for your help, I will post the problem with the WIFI AP in the according thread.

Gtz

Horaces