[Users] high availability via fencing

Hello, I'm testing ovirt for potential deployment and one of the metrics for its success relies on the high availability feature. In my research on this feature, I found scattered documentation indicating that fencing is a prerequisite. On my test hardware, I don't have any LOM/IPMI but I see that APC managed PDUs are supported, which I do have. The problem is when I try to configure Power Management to use the "apc" type, I get this error: Test Failed, Host Status is: unknown. The fence-agent script reported the following error: Failed: You have to enter plug number Please use '-h' for usage ovirt-engine/engine.log tells me: 2012-04-20 11:32:44,595 INFO [org.ovirt.engine.core.bll.FencingExecutor] (http--0.0.0.0-8443-5) Executing <Status> Power Management command, Proxy Host:heilig, Agent:apc, Target Host:, Management IP:134.174.x.x, User:ovirt, Options:port=22,secure=true,slot=1 2012-04-20 11:32:44,598 INFO [org.ovirt.engine.core.vdsbroker.vdsbroker.FenceVdsVDSCommand] (http--0.0.0.0-8443-5) START, FenceVdsVDSCommand(vdsId = 6de5e3fa-8a33-11e1-b3f9-003048c85226, targetVdsId = 60087c5e-8a3b-11e1-b15d-003048c85226, action = Status, ip = 134.174.x.x, port = , type = apc, user = ovirt, password = ******, options = 'port=22,secure=true,slot=1'), log id: 57f86a56 2012-04-20 11:32:44,696 INFO [org.ovirt.engine.core.vdsbroker.vdsbroker.FenceVdsVDSCommand] (http--0.0.0.0-8443-5) FINISH, FenceVdsVDSCommand, return: Test Failed, Host Status is: unknown. The fence-agent script reported the following error: Failed: You have to enter plug number Please use '-h' for usage I've tried to add "port=1" to the Options field but that seems to have no effect. Any ideas? Is there any way to configure a "dumb" power management / fencing configuration for testing? Cheers, Ian