If you are adding Samba servers to a Windows NT domain, then you must not set up a Samba server as a DMB. By default, a Windows NT PDC for a domain is also the DMB for that domain. Network browsing may break if a Samba server other than the PDC registers the DMB NetBIOS name ( DOMAIN <1B>) with WINS.

For subnets other than the one containing the Windows NT PDC, you may set up Samba servers as LMBs as described. To make a Samba server a Local Master Browser, set the following options in the [global] section of the smb.conf file as shown in Local Master Browser smb.conf

If you wish to have a Samba server fight the election with machines on the same subnet, you may set the os level parameter to lower levels. By doing this you can tune the order of machines that will become LMBs if they are running. For more details on this, refer to Forcing Samba to Be the Master.

If you have Windows NT machines that are members of the domain on all subnets and you are sure they will always be running, you can disable Samba from taking part in browser elections and ever becoming an LMB by setting the following options in the [global] section of the smb.conf file as shown in smb.conf for Not Being a master browser