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W2K3 Domain Controller being challanged for broswe master.

Posted on 2004-09-14
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Last Modified: 2012-06-27
I have a windows 2003 domain.  Several PCs appears to be fighting with the domain controller for browse master.  Please review error message bellow.  Any insight on what is going on would be great!!!


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This message is from the Exchange server, SVR-1 is the domain controller and should be browse master, my qustion is why is the exchange server trying to promote itself?

BROWSER:8009
The browser was unable to promote itself to master browser.  The computer that currently believes it is the master browser is SVR-1.
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I am getting NetBT errors many machines:

NetBT:4321
The name "domain            :1d" could not be registered on the Interface with IP address 192.192.192.120. The machine with the IP address 192.192.192.202 did not allow the name to be claimed by this machine
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This error is from an app server it looks like PC-07 ( a newly introduced PC took broswer ):
BROWSER:8021
The browser service was unable to retrieve a list of servers from the browser master \\PC-07 on the network \Device\NetBT_Tcpip_{D83DF398-86D4-4D72-933E-2041CFFAD63A}.
 
 Browser master: \\PC-07
 Network: \Device\NetBT_Tcpip_{D83DF398-86D4-4D72-933E-2041CFFAD63A}
 
 This event may be caused by a temporary loss of network connectivity. If this message appears again, verify that the server is still connected to the network. The return code is in the Data text box.
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Question by:mberryaz
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JammyPak earned 2000 total points
ID: 12057635
I think the last one pretty much explains itself - if, for any reason, the machine (PC-07) loses contact with the MB for some amount of time, it will promote itself to be the Master Browser (ie, if you take a PC off the network and run it on it's own, the browser service will still promote the local PC to be it's own Master Browser). Once the PC is back online then it will clue in and start to use the correct MB. This could be the result of network or server maintenance, or any other connectivity problem.

Also, remember that each domain and workgroup will have a separate Master Browser for each network protocol, for each network segment. Therefore, unless everyone is using TCP/IP only, and is on the same segment, and is in the same domain, then it's perfectly normal to have >1 Master Browser.

Check the Exchange server to see if IsDomainMaster and/or MaintainServerList is set to True/1 - if so, I'd change them to FALSE/0.
(that's in HKLM/System/CCS/Services/Browser/Parameters)
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by:mberryaz
ID: 12057911
JammyPak -

Thanks for the info.  I will check the exchange server and set it to false.

About the first item.  That error was not on PC-7 but from a w2k3 app server, based on the error it can't talk to the BM - PC-7.  My concern is why does it think that PC-7 is the BM.  Funny thing is that I can't get to PC-7 at all, can't even ping to it.  I called the user and she said she can get on the internet just fine.  (just in case I made sure she wasn't running FW SP2).  

Please advise
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