A duplicate name has been detected on the tcp network

Eliu Guevara · 19-01-2008

Hi. my problem is next.

A duplicate name has been detected on the tcp network, the ip address of the
machine that send the message in the data. use nbtstat -n in command windows
to see wich name is in the conflict state.
Event ID: 4319

the result of command nbtstat -n is:

NetBIOS Local Name Table

Name Type Status
---------------------------------------------
CK01DC03 <00> UNIQUE Registered
CK01DC03 <20> UNIQUE Registered
CARACOLKNITS <00> GROUP Registered
CARACOLKNITS <1C> GROUP Registered
CARACOLKNITS <1B> UNIQUE Registered
CARACOLKNITS <1E> GROUP Registered
CARACOLKNITS <1D> UNIQUE Registered
CK01DC03 <03> UNIQUE Registered
..__MSBROWSE__.<01> GROUP Registered
ADMGUEVARA <03> UNIQUE Registered

Local Area Connection:
Node IpAddress: [172.19.10.18] Scope Id: []

NetBIOS Local Name Table

Name Type Status
---------------------------------------------
CK01DC03 <00> UNIQUE Registered
CK01DC03 <20> UNIQUE Registered
CARACOLKNITS <00> GROUP Registered
CARACOLKNITS <1C> GROUP Registered
CARACOLKNITS <1B> UNIQUE Registered
CARACOLKNITS <1E> GROUP Registered
CARACOLKNITS <1D> UNIQUE Registered
CK01DC03 <03> UNIQUE Registered
..__MSBROWSE__.<01> GROUP Registered
ADMGUEVARA <03> UNIQUE Registered

Ace Fekay [MVP] · 19-01-2008

In news:2F9B71A3-59FB-401F-9A2E-3BC9AA1E9E02@microsoft.com,
Eliu Guevara <Eliu Guevara@discussions.microsoft.com> typed:
> Hi. my problem is next.
>
> A duplicate name has been detected on the tcp network, the ip address
> of the machine that send the message in the data. use nbtstat -n in
> command windows to see wich name is in the conflict state.
> Event ID: 4319
>
> the result of command nbtstat -n is:
>
>
> NetBIOS Local Name Table
>
> Name Type Status
> ---------------------------------------------
> CK01DC03 <00> UNIQUE Registered
> CK01DC03 <20> UNIQUE Registered
> CARACOLKNITS <00> GROUP Registered
> CARACOLKNITS <1C> GROUP Registered
> CARACOLKNITS <1B> UNIQUE Registered
> CARACOLKNITS <1E> GROUP Registered
> CARACOLKNITS <1D> UNIQUE Registered
> CK01DC03 <03> UNIQUE Registered
> ..__MSBROWSE__.<01> GROUP Registered
> ADMGUEVARA <03> UNIQUE Registered
>
> Local Area Connection:
> Node IpAddress: [172.19.10.18] Scope Id: []
>
> NetBIOS Local Name Table
>
> Name Type Status
> ---------------------------------------------
> CK01DC03 <00> UNIQUE Registered
> CK01DC03 <20> UNIQUE Registered
> CARACOLKNITS <00> GROUP Registered
> CARACOLKNITS <1C> GROUP Registered
> CARACOLKNITS <1B> UNIQUE Registered
> CARACOLKNITS <1E> GROUP Registered
> CARACOLKNITS <1D> UNIQUE Registered
> CK01DC03 <03> UNIQUE Registered
> ..__MSBROWSE__.<01> GROUP Registered
> ADMGUEVARA <03> UNIQUE Registered

Is this machine multihomed? Is it a DC?

Please post an unedited ipconfig /all to help give us a start in diagnosing
this.

--
Regards,
Ace

This posting is provided "AS-IS" with no warranties or guarantees and
confers no rights.

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT,
MVP Microsoft MVP - Directory Services
Microsoft Certified Trainer

Infinite Diversities in Infinite Combinations

Eliu Guevara · 21-01-2008

Hi.

The problem is that it gives me the message in all of the company's computer.

The information above is the domain server

C:\Documents and Settings\admguevara>ipconfig /all

Windows 2000 IP Configuration

Host Name . . . . . . . . . . . . : ck01dc03
Primary DNS Suffix . . . . . . . : caracolknits.com
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : caracolknits.com

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/1000 MT Network
Connect
ion
Physical Address. . . . . . . . . : 00-13-72-5B-81-BF
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 172.19.10.18
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 172.19.10.1
DNS Servers . . . . . . . . . . . : 172.19.10.18

Ethernet adapter Local Area Connection 2:

Media State . . . . . . . . . . . : Cable Disconnected
Description . . . . . . . . . . . : Intel(R) PRO/1000 MT Network
Connect
ion #2
Physical Address. . . . . . . . . : 00-13-72-5B-81-C0

C:\Documents and Settings\admguevara>

"Ace Fekay [MVP]" wrote:

> In news:2F9B71A3-59FB-401F-9A2E-3BC9AA1E9E02@microsoft.com,
> Eliu Guevara <Eliu Guevara@discussions.microsoft.com> typed:
> > Hi. my problem is next.
> >
> > A duplicate name has been detected on the tcp network, the ip address
> > of the machine that send the message in the data. use nbtstat -n in
> > command windows to see wich name is in the conflict state.
> > Event ID: 4319
> >
> > the result of command nbtstat -n is:
> >
> >
> > NetBIOS Local Name Table
> >
> > Name Type Status
> > ---------------------------------------------
> > CK01DC03 <00> UNIQUE Registered
> > CK01DC03 <20> UNIQUE Registered
> > CARACOLKNITS <00> GROUP Registered
> > CARACOLKNITS <1C> GROUP Registered
> > CARACOLKNITS <1B> UNIQUE Registered
> > CARACOLKNITS <1E> GROUP Registered
> > CARACOLKNITS <1D> UNIQUE Registered
> > CK01DC03 <03> UNIQUE Registered
> > ..__MSBROWSE__.<01> GROUP Registered
> > ADMGUEVARA <03> UNIQUE Registered
> >
> > Local Area Connection:
> > Node IpAddress: [172.19.10.18] Scope Id: []
> >
> > NetBIOS Local Name Table
> >
> > Name Type Status
> > ---------------------------------------------
> > CK01DC03 <00> UNIQUE Registered
> > CK01DC03 <20> UNIQUE Registered
> > CARACOLKNITS <00> GROUP Registered
> > CARACOLKNITS <1C> GROUP Registered
> > CARACOLKNITS <1B> UNIQUE Registered
> > CARACOLKNITS <1E> GROUP Registered
> > CARACOLKNITS <1D> UNIQUE Registered
> > CK01DC03 <03> UNIQUE Registered
> > ..__MSBROWSE__.<01> GROUP Registered
> > ADMGUEVARA <03> UNIQUE Registered
>
> Is this machine multihomed? Is it a DC?
>
> Please post an unedited ipconfig /all to help give us a start in diagnosing
> this.
>
> --
> Regards,
> Ace
>
> This posting is provided "AS-IS" with no warranties or guarantees and
> confers no rights.
>
> Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT,
> MVP Microsoft MVP - Directory Services
> Microsoft Certified Trainer
>
> Infinite Diversities in Infinite Combinations
>
>
>

Ace Fekay [MVP] · 22-01-2008

In news:4955E0B1-72FC-4C0C-B28A-D5F752FB14E8@microsoft.com,
Eliu Guevara <EliuGuevara@discussions.microsoft.com> typed:
> Hi.
>
> The problem is that it gives me the message in all of the company's
> computer.
>
> The information above is the domain server
>
> C:\Documents and Settings\admguevara>ipconfig /all
>
> Windows 2000 IP Configuration
>
> Host Name . . . . . . . . . . . . : ck01dc03
> Primary DNS Suffix . . . . . . . : caracolknits.com
> Node Type . . . . . . . . . . . . : Hybrid
> IP Routing Enabled. . . . . . . . : No
> WINS Proxy Enabled. . . . . . . . : No
> DNS Suffix Search List. . . . . . : caracolknits.com
>
> Ethernet adapter Local Area Connection:
>
> Connection-specific DNS Suffix . :
> Description . . . . . . . . . . . : Intel(R) PRO/1000 MT
> Network Connect
> ion
> Physical Address. . . . . . . . . : 00-13-72-5B-81-BF
> DHCP Enabled. . . . . . . . . . . : No
> IP Address. . . . . . . . . . . . : 172.19.10.18
> Subnet Mask . . . . . . . . . . . : 255.255.255.0
> Default Gateway . . . . . . . . . : 172.19.10.1
> DNS Servers . . . . . . . . . . . : 172.19.10.18
>
> Ethernet adapter Local Area Connection 2:
>
> Media State . . . . . . . . . . . : Cable Disconnected
> Description . . . . . . . . . . . : Intel(R) PRO/1000 MT
> Network Connect
> ion #2
> Physical Address. . . . . . . . . : 00-13-72-5B-81-C0
>

Thanks for posting the ipconfig /all.

This looks fine. So you're saying it's network wide. Duplicate names message
can also come up if there are any following duplicate names, and not only
computer names:

computer names
workgroup names
active directory or local group names
usernames

For example, if you have a domain name called "CARACOLKNITS" and you create
a user account of the same name, it will come up as a duplicate.

If you have a computer name called JOE and you attempted to make a local
user account called "joe," you will get a duplicate name error.

Are there any duplicates wtih the name "ADMGUEVARA" or "CARACOLKNITS" that
might also be a user account, a computer name, laptop, a group name, etc?

Ace

**kachakola** · 14-03-2012

I have the same problem.
My Server is based on Windows 2008 R2, 4 NIC Card, under a Domain, IIS7 configured and several Intranet application running on.
Same error "A duplicate name has been detected on the TCP network".
IP address ranges are: 172.16.15.173 to 176

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Users\Administrator>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : APPSVRIIS008
Primary Dns Suffix . . . . . . . : mydomain.com
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : mydomain.com

Ethernet adapter GB-Port-176:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom BCM5709C NetXtreme II GigE (NDIS
VBD Client) #42
Physical Address. . . . . . . . . : BC-30-11-E97-2D-5B
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 172.16.15.176(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 172.16.15.1
DNS Servers . . . . . . . . . . . : 172.16.15.2
172.16.15.3
Primary WINS Server . . . . . . . : 172.16.15.2
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter GB-Port-173:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom BCM5709C NetXtreme II GigE (NDIS
VBD Client) #39
Physical Address. . . . . . . . . : BC-30-11-E97-2D-5C
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 172.16.15.173(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 172.16.15.173(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 172.16.15.1
DNS Servers . . . . . . . . . . . : 172.16.15.2
172.16.15.3
Primary WINS Server . . . . . . . : 172.16.15.2
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter GB-Port-175:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom BCM5709C NetXtreme II GigE (NDIS
VBD Client) #37
Physical Address. . . . . . . . . : BC-30-11-E97-2D-5D
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 172.16.15.175(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 172.16.15.1
DNS Servers . . . . . . . . . . . : 172.16.15.2
172.16.15.3
Primary WINS Server . . . . . . . : 172.16.15.2
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter GB-Port-174:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom BCM5709C NetXtreme II GigE (NDIS
VBD Client) #38
Physical Address. . . . . . . . . : BC-30-11-E97-2D-5E
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 172.16.15.174(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 172.16.15.1
DNS Servers . . . . . . . . . . . : 172.16.15.2
172.16.15.3
Primary WINS Server . . . . . . . : 172.16.15.2
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.{FF9ACB0C-3C06-450B-8F37-5A80EC623197}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{8CBFDF79-079A-4D67-8F83-FC99DE2A951B}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{5EC76638-84DC-48CB-9D97-A3E9BE956F1D}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{11543E2B-05FE-445B-8DED-9A141B4BAD30}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #4
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Teredo Tunneling Pseudo-Interface:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No