I just got a new Sun Fire T2000, installed Solaris 11 and was going to configure LDOMs. However "ldmd" can't be started and in turn ldm doesn't work.

root@solaris11:~# ldm
Failed to connect to logical domain manager: Connection refused

root@solaris11:~# svcadm enable svc:/ldoms/ldmd:default

root@solaris11:~# tail /var/svc/log/ldoms-ldmd\:default.log 
[ May 28 12:56:22 Enabled. ]
[ May 28 12:56:22 Executing start method ("/opt/SUNWldm/bin/ldmd_start"). ]
Disabling service because this domain is not a control domain
[ May 28 12:56:22 Method "start" exited with status 0. ]
[ May 28 12:56:22 Stopping because service disabled. ]
[ May 28 12:56:22 Executing stop method (:kill). ]

Why is this not a control domain? There is no other domain on the box (as far as I can tell).

I have upgraded the firmware to the latest 6.7.12, booted with reset_nvram, nothing helped ...

sc> showhost
Sun-Fire-T2000 System Firmware 6.7.12  2011/07/06 20:03

Host flash versions:
   OBP 4.30.4.d 2011/07/06 14:29
   Hypervisor 1.7.3.c 2010/07/09 15:14
   POST 4.30.4.b 2010/07/09 14:24 

What else should I do?

Thanks!