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Domain Controller Discovery in Active Directory
Hi,
Could anyone tell me how a client decides what domain controller to use when it logs on to the network. I know the bits about ging to DNS and performing a lookup for DCs in the same site etc, but what I really need to know is this: When a list of available domain controllers are returned to the client (and lets assume this client has never logged on before, like say a new build would be), does the client contact them all simultaneously and begin the logon process with the first one to respond, or does the client go through the list of returned domain controllers one by one, meaning that if the client were to be returned say 10 DCS, and the first 8 were offline for whatever reason (network outage or whatever), then there would would be a long delay while the client tried to use those first 8?
many thanks
Could anyone tell me how a client decides what domain controller to use when it logs on to the network. I know the bits about ging to DNS and performing a lookup for DCs in the same site etc, but what I really need to know is this: When a list of available domain controllers are returned to the client (and lets assume this client has never logged on before, like say a new build would be), does the client contact them all simultaneously and begin the logon process with the first one to respond, or does the client go through the list of returned domain controllers one by one, meaning that if the client were to be returned say 10 DCS, and the first 8 were offline for whatever reason (network outage or whatever), then there would would be a long delay while the client tried to use those first 8?
many thanks
Anti-Virus AppsActive DirectoryMicrosoft Legacy OS
Last Comment
tbennett35
The first one that responds in its site wins and then the DC info is cached, really in-depth article here
http://support.microsoft.c
How Domain Controllers Are Located in Windows XP
Thanks
Mike
http://support.microsoft.c
How Domain Controllers Are Located in Windows XP
Thanks
Mike
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This is going to sound ridiculous, I'm well aware, but...what about if:
- There were no AD sites and subnets defined for sites that contained clients
- If, in a hub/spoke topology, the branch sites used overlapping IP ranges, in a situation where te branch sites couldn't directly talk to each other, so say 192.168.1.0/24 used in two sites independently? It would send the DC locator into a spin, right?
- There were no AD sites and subnets defined for sites that contained clients
- If, in a hub/spoke topology, the branch sites used overlapping IP ranges, in a situation where te branch sites couldn't directly talk to each other, so say 192.168.1.0/24 used in two sites independently? It would send the DC locator into a spin, right?
http://support.microsoft.com/kb/247811