The name "XX :1d" could not be registered

Question

Hello,

I'm getting multiple errors in the event log stating the following:

The name "XX             :1d" could not be registered on the interface with IP address 192.168.1.4. The computer with the IP address 192.168.1.179 did not allow the name to be claimed by this computer.

This happens to come from multiple PCs. I do not have duplicate names on the network and this had been no problem for years. It just happened to start appearing.

Any ideas?

Answer 1

Hello Karel,

Thank you for posting in Microsoft Community forum.

This issue is likely caused by NetBIOS name conflicts or network resolution problems. The error message indicates that a computer (192.168.1.179) is rejecting the name registration from another computer (192.168.1.4). Here's a concise troubleshooting guide:

1. NetBIOS Name Conflict: Check for duplicate NetBIOS names using nbtstat -n. If duplicates are found, rename the conflicting computer.
2. WINS Server Issue: If you're using WINS, restart the WINS service and clear the WINS database with netsh interface ip delete arpcache.
3. LLMNR Conflict: Disable LLMNR on affected computers using:
4. Set-NetIPInterface -InterfaceAlias "Ethernet" -NlMnrDisabled $true
5. IP Address Conflict: Check for IP conflicts with arp -a. Ensure no duplicate IPs are assigned.
6. DNS/DHCP Issues: Verify DNS settings and ensure the DHCP server is not assigning duplicate IPs.
7. Reboot Machines: Restart affected PCs to clear network configuration issues.
8. Update Windows: Ensure all machines are up-to-date, especially network-related updates.
9. Reset TCP/IP Stack: Run netsh int ip reset to reset the network settings.

These steps should help resolve the problem. If it persists, deeper network configuration checks may be necessary.

Answer 2

Dear Molly,

Thank you for your answer. I'm sure I do not have any duplicate names on the network as this worked fine for years.

I tested the following:

On one of the PCs that was given me this error, I disabled the netBIOS over TCP/IP. Then the error message diapered from the Event Viewer on the server, however, a new message for another PC appeared. When I then disabled the netBIOS over TCP/IP on that PC, it appeared from another PC and so on. This is really weird. I've never seen this before. I can follow some of your steps to reset things but wanted to give you this additional info.

Answer 3

Thanks for the update! Based on what you've shared, here are some additional steps you can try to further investigate and resolve the issue:

1. Flush NetBIOS Cache: On each affected machine, run nbtstat -R to clear the NetBIOS cache and then restart the machines. This ensures they re-register their names.
2. Clear ARP Cache: Run arp -d to clear the ARP cache on all affected devices, including routers if possible. Then, use arp -a to check for any IP conflicts or incorrect mappings.
3. Release and Renew IP Addresses: On each machine, execute:

ipconfig /release

ipconfig /renew

This will ensure there are no stale IP assignments from DHCP that could cause conflicts.

1. Check DHCP Leases: If you're using DHCP, verify the lease assignments on your DHCP server. Make sure no IP addresses are being reassigned or leased to multiple devices.
2. Review Event Logs: Look for any related errors or warnings in the Event Viewer, especially in the DNS or System logs. You may find additional clues about what's causing the name registration failure.
3. Test with Static IPs: As a test, try assigning static IPs to the affected machines to see if this resolves the issue. This can help identify if the problem is related to DHCP.
4. Ensure Time Synchronization: Check that all affected devices have synchronized system time. Time issues can sometimes cause network-related problems, especially in domain environments.

By going through these steps, you should be able to either resolve the issue or gather more information about what might be causing it. Let me know how it goes or if you need further assistance!

Answer 4

OK I will test and get back to you. I'm installing a new server with new DHCP so we'll see what happens then.

Answer 5

This same issue just started happening for us as well. It must be a Windows update or an Office update. Only Outlook and other Microsoft apps are affected. It causes them to freeze and crash.