Duplicate Name Exists on Network

  • humbletech99
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Post 3+ Months Ago

Hi,
When I do Start --> Run --> \\hostname I get the error:

"A duplicate name exists on the network"

How do I find the ip addresses of the conflicting machines so I can fix this?
  • grinch2171
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Post 3+ Months Ago

You need to give a bit more detail about your network.

Is it Active Directory? 2000 or 2003? How many PC's are you dealing with? When did this issue start?

You could try ping hostname and that will pull an IP for the hostname.
  • humbletech99
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Post 3+ Months Ago

It's an NT4 domain with a lots of Windows and Linux/Samba machines. When I ping, I get through to the machine and see it's ip.

It's worth noting that there are 2 machines called hostname and hostname2.

\\host is actually what is being used as a shortcut to hostname. hostname2 should not be conflicting I feel. It has it's own shortcut called host2. Both names and both shortcuts are in DNS and resolve fine that way, but here DNS is not being used.

\\host used Netbios.

I've queried the WINS server by nblookup and it resolves host to hostname. Don't know why \\host doesn't work then...

I don't know when this started, someone else brought it to my attention. I would suspect that hostname and hostname2 are conflicting but can't prove this.

I need a definite way to find out both machines which are claiming "host".
  • grinch2171
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Post 3+ Months Ago

If you ping host who's ip do you get? Hostname or Hostname2's IP?
  • humbletech99
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Post 3+ Months Ago

I get hostname, which is what host should be resolved to.

I don't know exactly how it's supposed to resolve to this though. The WINS server doesn't have a record for it and I don't know who a Windows machines could have 2 hostnames or an alias...
  • grinch2171
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Post 3+ Months Ago

What happens when you ping host2?
  • humbletech99
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Post 3+ Months Ago

pinging host2 resolves to hostname2 and works...
  • grinch2171
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Post 3+ Months Ago

So if you try \\host you get the duplicate name error. I would have to assume since NETBIOS relies on unique hostnames to resolve then that is your problem. The two PC's hostnames are too similar.
  • humbletech99
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Post 3+ Months Ago

that would be my guess too. I've been having other problems with this junk that is called netbios... I have trouble connecting workstations to nt domain, saying it can't find the domain controller, despite netbios being enabled and supplying netbios name of domain, creating trust relationships between domains even on same subnet it also says it can't find domain controller...
  • grinch2171
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Post 3+ Months Ago

netbios is antiquated. If you could use DNS I would.
  • humbletech99
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Post 3+ Months Ago

I know, when I migrate everything to Active Directory I will, but cross subnet browsing I think will still need WINS for our remote office...

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