[Samba] confused about domainname

[Uli Iske]

hi !

i'm a little bit confused about the domain names,
in my smb.conf workgroup name is set to 'workgroup=samba'.
the name of the domaincontroller is 'netbios name=dc01'.

if i do a net rpc join the machine always joins the domain dc01
doesn't matter if i use the -w switch.
(do i have to join a domaincontroller to his own domain ?)

same with net setlocalsid, it's always set for dc01.

there is a account dc01 objectclass sambaDomain in ldap, it's
automatically created. please help, my domain name is samba, not dc01.

thanks in advance

uli