The master browser has received a server announcement from the computer that believes that it is the master browser for the domain on transport NetBT_Tcpip_A563D8D5-4C37-4BD2-B6. The master browser is

Windows 2000 Question

I got this error in my system.log file and Network become too slow.
The master browser has received a server announcement from the computer <computer Name >  that believes that it is the master browser for the domain on transport NetBT_Tcpip_{A563D8D5-4C37-4BD2-B6. The master browser is stopping or an election is being forced.

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by:Posted on 2004-02-11 at 01:44:58ID: 10330649

http://www.eventid.net/display.asp?app=Top10&eventid=8003


Event ID: 8003
Source Browser  
Type Error  
Description The master browser has received a server announcement from the computer <Windows NT client> that believes that it is the master browser for the domain on transport <NetBT>. The master browser is stopping or an election is being forced.  
Comments Niendertal (Last update 9/27/2003):
In my case this error was right after I installed a new machine with Win2kPro. On the Event Viewer of the DC this error started to appear. To fix this I configured the WINS in my DC. But you can resolve this error with lmhosts on the network for netbios name resolution. If you do not want to configure WINS on your server, Microsoft has related information about this problem and how to resolve this with your network Routers. Just make sure the routers on the network are not forwarding UDP broadcasts. See Q190930.

Adrian Florin Moisei (Last update 4/30/2003):
If the event occurs in the domain controller's system log see Q135464.

Woodrow Wayne Collins
The subnet mask of the Windows 2000 client computer is incorrect or is different from the primary domain controller. The client computer has attempted to promote itself to the master browser of the subnet and has failed.
To Fix: Change the TCP/IP protocol configuration to the correct subnet mask. See Q143153 and Microsoft Messages links.

This can also be caused when routers or switches are misconfigured and propagate UDP port 137 and 138 broadcasts. In this case large numbers of event 8003 appear in the event log. Also check Q190930 for more information.  
Links Q135464 , Q143153 , Q190930 , Microsoft Messages  
Send comments   -    Notify me when updated  
Automatic search for "Event 8003 Browser" at:
Support @ Microsoft  -  Search @ Microsoft  -  Google Newsgroups  -  Google Microsoft    
   
Source MRxSmb  
Type Error  
Description The master browser has received a server announcement from the computer <computer name> that believes that it is the master browser for the domain on transport NetBT_Tcpip_{B7545DFC-BA6C-4712-81. The master browser is stopping or an election is being forced.  
Comments Ionut Marin (Last update 11/2/2003):
From a newsgroup post: "I just resolved a similar issue. My IP address and netmask were correct so according to TechNet I should not be getting this error message. I did an "ipconfig /release" followed by a "/renew" and received the 8003 message again. Therefore, I disabled the adapter then enabled it and everything is fine. Did another "ipconfig /release, /renew" and no message came up on the server. Note: This adapter had a static IP configuration at one time when it was connected to another network. Perhaps that was not cleaned up 100% when I changed it to DHCP. Disabling and enabling the adapter seemed to reset the configuration completely".

Dan Israel (Last update 9/27/2003):
Client desktop or workstations using Win XP Pro can cause this issue if the built in Internet Connection Firewall is active.  Because this feature interferes with the network browsing, the client will attempt to become the Master Browser. Disabling the setting under browser/parameter will block the attempt to become master, but the client will still have difficult seeing and being seen in the workgroup/domain.

Michael Hopkinson
The actual commands to be applied to the Cisco router are:
"no ip forward-protocol udp NetBIOS-ns"
and
"no ip forward-protocol udp netbios-dgm"
This will prevent each VLAN or segment from seeing the others when sending out NetBIOS broadcasts.  You should end up with a valid master browser in each segment and no longer have these Events on your DC.

Woodrow Wayne Collins
See also Microsoft W2K Resource Kit link.

Damien Murphy
Related to Cisco routers that have IP helper statements that point back to the DHCP server: This also occurs with "ip-helpering" if the DHCP server is a Windows 2000 Domain Controller holding the PDC Emulator Role (as it is the Domain Master Browser).

Adrian Grigorof
In order to stop this error from occuring, use Regedit and set the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Browser\Parameters\MaintainServerList from Auto or YES to FALSE

This will prevent the computer from attempting to become a Domain Master Browser and compete with Domain Controllers. If the server is a domain controller it is advisable to leave it with the default settings.

Kevin Biddick
Look for NT 4.0 Domain controller that is hosting DHCP and Cisco routers that have IP helper statements that point back to the DHCP server. The default IP helper setings cause master browser elections.  


Source Rdr  
Type Error  
Description The master browser has received a server announcement from the computer CORPSHR01 that believes that it is the master browser for the domain on transport NetBT_N1001. The master browser is stopping or an election is being forced.  
Comments Adrian Grigorof
This event may be genereate in various conditions - some of them are not errors per se. For example a PDC is started and it will send announcements to the network that it is the Master Browser  (a PDC is always the Master Browser). In this case, the existing Master Browser will generate an 8003 message in the event log. Sometimes, an improperly configured computer (i.e. wrong subnet mask) does not detect the existing Master Browser so it announces itself as the Master Browser.

Adrian Florin Moisei (Last update 4/19/2003):
From a newsgroup post: "The error references a specific Win 98 client and is occurs repeatedly despite the fact that both the client and the NT Server are both running continuously. A Win98 machine will do this when File and Print Sharing has been enabled. Even if you don't share anything, by simply installing F&P Sharing, you'll cause elections to occur. This is because by default, Win9x machines have Browse Master set to Automatic. When Win98 starts, it first checks to see if a master browser is already present for its designated workgroup. If a master browser server does not exist, or if some problem exists that prevents the Win9x machines from determining who the browse master is, an election occurs.

To use F&P Sharing, but stop the elections from occurring, go into the Properties for F&P Sharing and set Browse Master to Disabled. Then, reboot for the changes to take effect."  
Links Q188305 , Q143153 , Q135464

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