System Log Event ID 4321 every 30 seconds, system name conflict for a name not in use
-- Symptom -- System event log shows an error with event ID 4321 every 30 seconds: The name "pac-1 :2d" could not be registered on the interface with IP address 172.20.51.206. The computer with the IP address 172.20.21.2 did not allow the name to be claimed by this computer. -- Environment -- OS: Windows 7 x64 Enterprise Network: Enterprise domain DHCP: Yes WINS: via DHCP -- Additional information -- This computer was set up from an image. The image was built with the system being named 'pac-1'. This system's name was changed to 'pac-11' before (or possibly shortly after) joining the domain and now has a completely different name, and there is no system on the network with the name 'pac-1' (there are 'pac-3', and other numbers, but no 'pac-1') I have renamed the system with no change to the frequency of the error, and I cannot find 'pac-1' in the registry anywhere except for strings located in HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\LANDesk\Inventory\LogonHistory\Logons that list prior logons. I've done my google research and have found great information for plenty of other people's situations, just not this one. Any helpful advice is welcome. Thank you!
June 13th, 2012 12:33pm

Thanks, Wolfgang. Your assumption that 172.20.21.2 is a WINS server is correct - we have a primary (21.1) and an alternate (21.2). Also look if the domain/workgroup name, which is used by this machine is correct and identical to all other machines. I have confirmed that my machine's domain name is correct and identical to all other machines. Or were you saying to check this on the WINS server? I don't administer the WINS server, so I'll have to get back to you on the items to check from there. Thanks!
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June 13th, 2012 3:38pm

Hi, I agree with Wolfp. The issue may be related to the NetBIOS Name. Please consider to contact your Domain Administrator to double check it on Server site. Please refer to this. http://technet.microsoft.com/en-us/library/cc738412(v=ws.10).aspx If the issue persists or encounter any problem during changing NetBIOS Name, please post your problem on Server Forum. You will get the more solid suggestion. http://social.technet.microsoft.com/Forums/en/category/windowsserver/Kim Zhou TechNet Community Support
June 15th, 2012 6:02am

This is a pretty low-priority for our network admins, so they haven't gotten back to me on this yet. I'll let you know what I find out once they do. Thank you!
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June 26th, 2012 11:05am

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