C:\Documents and Settings\user>nbtstat -a server1

Local Area Connection:
Node IpAddress: [192.168.0.10] Scope Id: []

NetBIOS Remote Machine Name Table

Name Type Status
---------------------------------------------
server1 <00> UNIQUE Registered
server1 <20> UNIQUE Registered
domain <00> GROUP Registered
domain <1C> GROUP Registered
domain <1B> UNIQUE Registered
domain <1E> GROUP Registered
domain <1D> UNIQUE Registered
..__MSBROWSE__. <01> GROUP Registered

MAC Address = XX-XX-XX-XX-XX-X1


C:\Documents and Settings\user>nbtstat -a server2

Local Area Connection:
Node IpAddress: [192.168.0.10] Scope Id: []

NetBIOS Remote Machine Name Table

Name Type Status
---------------------------------------------
server2 <00> UNIQUE Registered
domain <00> GROUP Registered
domain <1C> GROUP Registered
server2 <20> UNIQUE Registered
domain <1E> GROUP Registered
domain <1D> UNIQUE Registered
..__MSBROWSE__. <01> GROUP Registered

MAC Address = XX-XX-XX-XX-XX-X2

C:\Documents and Settings\user>nbtstat -a server3

Local Area Connection:
Node IpAddress: [192.168.0.10] Scope Id: []

NetBIOS Remote Machine Name Table

Name Type Status
---------------------------------------------
server3 <00> UNIQUE Registered
domain <00> GROUP Registered
domain <1C> GROUP Registered
server3 <20> UNIQUE Registered
domain <1E> GROUP Registered

MAC Address = XX-XX-XX-XX-XX-X3
Server1 is the "master" browser and is supposed to be the "PDC" if there is such a thing in Active Directory.

server2 is a backup browser that participates in browser elections if the master browser is down.... a "BDC" if there is such a thing in Active Directory.

server3 is a backup browser that participates in browser elections if the master browser is down.... a "BDC" if there is such a thing in Active Directory.

Both server1, server2 and server 3 are on different subnets.
Server 3 doesnt' show up as master browser.

Using browser mon I have determined that server1 is the domain master browser.

According to netbios hex codes (http://jcifs.samba.org/src/docs/nbtcodes.html) both server1 and server2 are the "master browser".

I see that server1 also has a hex code of 1B which is Domain Master Browser.

<domain> 1B U Domain Master Browser
<computername> 01 U Messenger Service
<\\--__MSBROWSE__> 01 G Master Browser
<domain> 1D U Master Browser
<domain> 1 E G Browser Service Elections

None of my other 2k servers (either on the same subnet or different subnets) have a hex doce of 1D or 01 which is Master Browser.

Why would server1 and server 2 both show up as master browser?

I thought that there was only allowed to be one master browser. The master browser is also the domain master browser.

What am I missing?!