[Linux-cluster] HP iLO3 and /sbin/fence_ilo not working

Jason_Henderson at Mitel.com Jason_Henderson at Mitel.com
Fri Feb 18 17:47:17 UTC 2011

According to this knowledge base article at redhat, 
https://access.redhat.com/kb/docs/DOC-39336, the /sbin/fence_ilo script 
should work with iLO3. I am using the version of cman mentioned in the 
article. The iLO3 firmware is at the latest revision 1.16.
The fence_ilo script just returns a connect/login error as follows:

[root at node01 ~]# /sbin/fence_ilo -o status -a '' -l mitel -p 
ilopassword -v
Unable to connect/login to fencing device

The login credentials are correct as I can connect via ssh:

[root at node01 ~]# ssh mitel at
mitel at's password:
User:mitel logged-in to ILOUSE103N281.(
iLO 3 Standard 1.16 at  Dec 17 2010
Server Name: host is unnamed
Server Power: On


Is their anything else that needs to be done to execute the script 
successfully? The fence_ilo script works on previous iLO versions.

Linked Article:


    * How do I  set up HP iLO3 as a fence device in a Red Hat Cluster 
Suite (RHCS) cluster?
    * Why does fencing fail on Red Hat Cluster Suite when using HP's iLO3?

    * Red Hat Enterprise Linux (RHEL) 5
    * Red Hat Enterprise Linux 6
    * Red Hat Cluster Suite
    * HP iLO3


Support for the iLO3 fence device in RHEL5 has been added with the release 
of cman 2.0.115-34.el5_5.4 through erratum RHEA-2010-0876. No special 
setup is required after installing this erratum to get the iLO3 to work.

HP has also released new firmware to address an issue with fence_ipmi 
which could cause the server to be powered on instead of off. We therefore 
advise you to upgrade to firmware version 1.15 (28 Oct 2010) as provided 
by HP. For installation instructions or problem resolution with this 
firmware version we refer you to the HP website.
Root Cause

HP iLO3 was not supported by fence_ilo.
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