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How do I troubleshoot a computer receiving the IP address of a domain controller in the wrong site for the domain name (domain.com)?

Asked by orbitirrigation in Active Directory, Domain Name Service (DNS)

Tags: Active Directory, DNS

We have a handful of computers (about 10 out of 350) that will receive the IP address of a domain controller in a different site when trying to resolve the domain.  From these computers we will ping domain.com and then run ipconfig /flushdns and then ping domain.com again.  As we repeat this process over and over we will receive a different IP and cycle through all DCs in the domain.

We have 6 domain controllers in our domain and AD Sites & Services is configured as follows:

Site1
DC1 (192.168.128.11)
DC2 (192.168.128.12)
DC3 (192.168.128.13)
Subnet = 192.168.128.0/24
Subnet = 192.168.132.0/24

Site2
DC4 (192.168.150.11)
DC5 (192.168.150.12
Subnet = 192.168.150.0/24

Site3
DC6 (192.168.151.11)
Subnet = 192.168.151.0/24

One of the computers that is having this problem has the IP address 192.168.132.75, however the majority of the other computers on the 192.168.132.0/24 subnet do not experience this same problem.  What can we do to figure out why this computer does not resolve a domain controller in the correct site?
 
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