Hello, Seems your computer cannot access the network because it could not contact the Windows Internet Name Service (WINS) server to register its name . This could be caused by loss of network connectivity. Here is the way to troubleshoot Event ID:4321:http://www.microsoft.com/technet/support/ee/transform.aspx?ProdName=Windows%20Operating%20System&ProdVer=5.2&EvtID=4321&EvtSrc=NetBT&LCID=1033Regards, Ravikumar P

We have 3 Domain Controllers in different geographical locations linked via a VPN Tunnel. One is the Primary Domain Controller and the others get the following error. One in particular gets this every 30 minutes (approx) The servers are all Windows Server 2003. The name "DOMAIN NAME :1d" could not be registered on the Interface with IP address 192.168.100.250. The machine with the IP address 192.168.0.1 did not allow the name to be claimed by this machine. and occasionally The name "DOMAIN NAME :1d" could not be registered on the Interface with IP address 192.168.100.250. The machine with the IP address 192.168.1.1 did not allow the name to be claimed by this machine. The ipconfig /all readings for each server are as follows; Server 1 - PDC Windows IP Configuration Host Name . . . . . . . . . . . . : Server1 Primary Dns Suffix . . . . . . . : domain.local Node Type . . . . . . . . . . . . : Unknown IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : domain.local Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : HP NC7760 Gigabit Server Adapter Physical Address. . . . . . . . . : ----- DHCP Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 192.168.0.1 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.0.250 DNS Servers . . . . . . . . . . . : 192.168.0.1 Server 2 Windows IP Configuration Host Name . . . . . . . . . . . . : Server2 Primary Dns Suffix . . . . . . . : domain.local Node Type . . . . . . . . . . . . : Broadcast IP Routing Enabled. . . . . . . . : Yes WINS Proxy Enabled. . . . . . . . : Yes DNS Suffix Search List. . . . . . : domain.local Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : HP NC320i PCIe Gigabit Server Adapter Physical Address. . . . . . . . . : ----- DHCP Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 192.168.1.1 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.1.201 DNS Servers . . . . . . . . . . . : 192.168.1.1 192.168.0.1 Server 3 Windows IP Configuration Host Name . . . . . . . . . . . . : SRVNZ Primary Dns Suffix . . . . . . . : domain.local Node Type . . . . . . . . . . . . : Broadcast IP Routing Enabled. . . . . . . . : Yes WINS Proxy Enabled. . . . . . . . : Yes DNS Suffix Search List. . . . . . : domain.local Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : HP NC7761 Gigabit Server Adapter Physical Address. . . . . . . . . : ----- DHCP Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 192.168.100.250 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.100.201 DNS Servers . . . . . . . . . . . : 192.168.100.250 192.168.0.1 This error occurs all the time on 192.168.100.250 and occasionally on 192.168.1.1. Any help would be much appreciated. I will be dcpromo'ing these servers out in the near future and was hoping to resolve this error first, unsure if this is going to cause issues. Thanks in advance.

Hello, Seems your computer cannot access the network because it could not contact the Windows Internet Name Service (WINS) server to register its name . This could be caused by loss of network connectivity. Here is the way to troubleshoot Event ID:4321:http://www.microsoft.com/technet/support/ee/transform.aspx?ProdName=Windows%20Operating%20System&ProdVer=5.2&EvtID=4321&EvtSrc=NetBT&LCID=1033Regards, Ravikumar P

Hi, Thanks for the response. I have looked at all these options and I don't believe them to be the issue. the only possible option of the 3 mentioned is network connectivity but logs are telling me otherwise. Any other suggestions?

Hi, How you installed this Domain Controllers? Clean installation or deployed with system image. According to MS article: the issue computer has duplicate computer names on the network. To resolve this issue, rename the local computer: Computers must have unique names on the network. To rename the local computer: You must be logged on as an administrator or belong to the Administrators group to complete these steps. Click Start, click Control Panel, click System, and then click Change Settings. Click Change Computer Name, type the new computer name, and then click OK. For more information please refer to following MS articles: Event ID 4321 NBT Naming http://technet.microsoft.com/en-us/library/cc736044(v=WS.10).aspx "Duplicate Name Exists" Error Message When You Start a Windows XP Workstation http://support.microsoft.com/kb/822659Lawrence TechNet Community Support

Hi, How you installed this Domain Controllers? Clean installation or deployed with system image. According to MS article: the issue computer has duplicate computer names on the network. To resolve this issue, rename the local computer: Computers must have unique names on the network. To rename the local computer: You must be logged on as an administrator or belong to the Administrators group to complete these steps. Click Start, click Control Panel, click System, and then click Change Settings. Click Change Computer Name, type the new computer name, and then click OK. For more information please refer to following MS articles: Event ID 4321 NBT Naming http://technet.microsoft.com/en-us/library/cc736044(v=WS.10).aspx "Duplicate Name Exists" Error Message When You Start a Windows XP Workstation http://support.microsoft.com/kb/822659Lawrence TechNet Community Support