[Samba] samba pdc did not advertised as DMB

[Beast]

I figure out that samba PDC did not advertised itself as <domain>#1b (DMB), is this normal?

smb.conf :
  os level = 65
  preferred master = yes
  domain master = yes
  local master = yes
  domain logons = yes


[root at jeruk root]# nmblookup -A 10.200.100.3
Looking up status of 10.200.100.3
        LIN3PWK         <00> -         H <ACTIVE>
        LIN3PWK         <03> -         H <ACTIVE>
        LIN3PWK         <20> -         H <ACTIVE>
        ..__MSBROWSE__. <01> - <GROUP> H <ACTIVE>
        IRSPWK          <00> - <GROUP> H <ACTIVE>
        IRSPWK          <1c> - <GROUP> H <ACTIVE>
        IRSPWK          <1d> -         H <ACTIVE>
        IRSPWK          <1e> - <GROUP> H <ACTIVE>

## Lookup on NT PDC (different domain)
[root at jeruk root]# nmblookup -A 10.1.100.16
Looking up status of 10.1.100.16
        NT6-PWR         <00> -         M <ACTIVE>
        IRSPWR          <00> - <GROUP> M <ACTIVE>
        IRSPWR          <1c> - <GROUP> M <ACTIVE>
        NT6-PWR         <20> -         M <ACTIVE>
        IRSPWR          <1b> -         M <ACTIVE>
        IRSPWR          <1e> - <GROUP> M <ACTIVE>
        IRSPWR          <1d> -         M <ACTIVE>
        ..__MSBROWSE__. <01> - <GROUP> M <ACTIVE>
        INet~Services   <1c> - <GROUP> M <ACTIVE>
        IS~NT6-PWR      <00> -         M <ACTIVE>
        NT6-PWR         <01> -         M <ACTIVE>


--beast