ipmi on a supermicro mothercard

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http://serverfault.com – As newbie, I try to use IPMI with a supermicro mothercard x8dth-if, version 1.0 I decided to use the LAN1, not the dedicated IPMI LAN. In BIOS I set the address to for IPMI. My OS is debian-squeeze. I installed ipmitool. LAN1 address is and I can ping it. The command ipmitool chassis status returns Could not open /dev/ipmi0 ls -l /dev/ipmi* returns nothing. ping returns timeout How can I invetigate more at this level ? Thank you by advance. (HowTos)