I have corrected the error!
Error:
Sep 18 13:53:46 gdrenterprise libvirtd: 13:53:46.116: error :
virInterfaceDefParseMtu:141 : XML description for interface mtu value is
improper is not well formed or invalid
To correct this error you will have to remove or correct the entry of
virtual IP's added to /etc/sysconfig/network-scripts/ by the virtual
application.
Theory!
I suspect that if you add the network interface with application that
have non root privileges or you have configured /etc/access.conf.
In additional to running selinix, root could be the one that may have
the authority to add the network interface configuration.
--
Glynn D. Reynolds <glynnreynolds123(a)gmail.com>
GDRENTERPRISE