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Question: ----------------------------------------------

hello, I have a problem which you’ve probably heard a lot of – master browser – I keep getting error – MRxSmb event ID 8003. Before deciding to ask for any ideas I spent day googling and trying to solve it. What I did:

1. I switched the computer browser service on PC which “belived that it was the master browser” but few minutes after I get the same error but from another PC (random).

2. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Browser\Parameters\IsDomainMaster to TRUE – no joy – still getting the same error.

3. Restarted DC.

4. Additional info: there are 3 subnets in our network, WINS server (running on DC), there are many laptops machines (so wireless and Ethernet cards..).

 

No joy – I keep getting the same errors in DC log. I used browstat:

1. browstat.exe status:

 

------------------------------------------------------------------------------------------------------

Status for domain UTT on transport \Device\NetBT_Tcpip_{ED0EF83B-C300-450C-9DE1-

83F51F365392}

    Browsing is active on domain.

     Master browser name is: UTT-DC1

        Master browser is running build 3790

    3 backup servers retrieved from master UTT-DC1

        \\UTT-FS0

        \\UTT-DC1

        \\UTT-FS04

    There are 148 servers in domain UTT on transport \Device\NetBT_Tcpip_{ED0EF8

3B-C300-450C-9DE1-83F51F365392}

    There are 1 domains in domain UTT on transport \Device\NetBT_Tcpip_{ED0EF83B

-C300-450C-9DE1-83F51F365392}

-------------------------------------------------------------------------------------------------------

 

The backup servers seems to be changing quite often – I don’t know if it should be like that.

 

2. What worries me if I use command “browstat status \\UTT-DC1” I do not get a response:

 

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C:\>Browstat.exe status \\UTT-DC1

 

 

Status for domain \\utt-dc1 on transport \Device\NetBT_Tcpip_{ED0EF83B-C300-450C-

9DE1-83F51F365392}

    Browsing is NOT active on domain.

    Master name cannot be determined from GetAdapterStatus.

-------------------------------------------------------------------------------------------------------

 

Any ideas what shall I do? I’ve read that I can use GP to switch off Computer Browser service on all PC. Shall I go for this option? What happens if there is no computer on different subnetwork with Computer Browser running – will I still be able to use all PCs in My Network Places?

 

Sorry for such a long post but I wanted to put as many details as possible.

 

Thank you for your help.

 

Marcin.

 

Answer 1: ----------------------------------------------

hi there,

computer browser / populating the computers in network neighborhood should be done automatically , please do not tweak any registry such as changing isdomainmaster .



what i suspect is that there is additional server that wants to participate in the election .

can you switch off the computer browser service and check

a) if you get any error related to computer browser / mrxsmb.

b) if there is a functionality change.

Few Points

a) if you have multiple subnets participating in elections , make sure routers are not forwarding UDP broadcasts

b) try disabling and enablign the NIC

c) make sure you are not running multihomed DC

I would like you to go through the link which is a troubleshooting guide for computer browser relative errors.
http://support.microsoft.com/default.aspx/kb/188305


sainath !analyze
  • Marked as answer by marcin00w Friday, July 3, 2009 8:16 AM

 

Answer 2: ----------------------------------------------

I solved the issue. That was caused by UDP broadcast on port 137 and 138. Helpful link: http://support.microsoft.com/default.aspx/kb/190930

On CISCO routers:

no ip forward-protocol udp netbios-ns
no ip forward-protocol udp netbios-dgm

Thanks for you help.

Marcin.

 

 

 

[reference]: https://social.technet.microsoft.com/Forums/windowsserver/en-US/86969451-77e6-44f0-85be-4cf710770376/master-browser-mrxsmb-event-id-8003-problem?forum=winservergen

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