Dell server with Dual powers fence_ipmilan fence_node Fail

Hi, All,

I have 3 nodes 1 Dell server (with dual power supplies) and 2 HP servers (only 1 power supplies), all of them install proxmox ve 3.1.

I found the fence_ipmilan fence_node of the Dell server does not work, error as following

fence_node node0 -vv
fence node0 dev 0.0 agent fence_ipmilan result: error from agent
agent args: nodename=node0 agent=fence_ipmilan ipaddr=192.168.1.10 lanplus=1 login=root passwd=XXXXXX power_wait=5
fence node0 failed

fence_ipmilan -l root -a 192.168.1.10 -p XXXXXX -o status
Getting status of IPMI:192.168.1.10...Chassis power = Unknown
Failed

But sometimes, fence_ipmilan, it can works
fence_ipmilan -l root -a 192.168.1.10 -p XXXXXX -o status
Getting status of IPMI:192.168.1.10...Chassis power = On
Done

fence_node node0 -vv still does not work
fence node0 dev 0.0 agent fence_ipmilan result: error from agent
agent args: nodename=node0 agent=fence_ipmilan ipaddr=192.168.1.10 lanplus=1 login=root passwd=XXXXXX power_wait=5
fence node0 failed


I am no idea to solve the problem, anyone can help.

Thanks!
Chris