fence_virtd does not start in RHEL7.1 - Trying to configure fencing for RHCS using RHEL6 KVM nodes

Hi,

I'm trying to setup HA cluster using RHEL6 nodes in RHEL7.1 host.

Facing below issue while configuring fencing.

[root@localhost Desktop]# fence_virtd
Could not find backend "libvirt"

[root@localhost Desktop]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.1 (Maipo)
[root@localhost Desktop]# uname -r
3.10.0-229.el7.x86_64

Can any of you help resolving this? Thanks... in advance