The value of tmnxDhcpsFoAdminState specifies the
administrative state of the failover facility of the DHCP server
instance.
When the value of this object is set to 'inService (2)',
it is not allowed to remove the corresponding local DHCP server,
or to create/delete corresponding entries in the following tables:
tmnxDhcpServerPoolTable, tmnxDhcpServerSubnetTable and
tmnxDhcpSvrSubnetRangesTable.