Hello,
executing from host itself the following command it works

[root@ov300 ~]# fence_ipmilan -P -a 10.10.193.103 -l fenceuser -A password -L operator -S /usr/local/bin/pwd_ov300.sh -o status
Status: ON
[root@ov300 ~]#

But I'm unable to obtain successful test result in web admin fencing agent config window

I set ip, user, password and ipmilan as agent, and then tried in options

auth=password,privlvl=operator,lanplus=1
and also
auth=password,privlvl=operator,lanplus=on

this the only host in cluster so it is the one used for testing by oVirt.

Tipically on these same server in RHEL 6.x ClusterSuite I use this in cluster.conf and it works too:

        <fencedevices>
                <fencedevice agent="fence_ipmilan" auth="password" delay="20" ipaddr="10.10.193.107" lanplus="1" login="fenceuser" name="dracnode01" passwd_script="/usr/local/bin/pwd_dracnode01.sh" privlvl="operator"/>

Any hint on correct mapping of parameters for oVirt?
Thanks,
Gianluca