Creating unique interfaceid in KVM (RHEL)

Consider the KVM VM has the below definition:

	<interface type='bridge'>
	<mac address='52:54:00:8c:30:e1'/>
	<source bridge='breth0'/>
	<virtualport type='openvswitch'>
	<parameters interfaceid='63bc2fbc-cfca-4917-9ae5-2d3a02b2504c'/>
	</virtualport>
	<model type='virtio'/>
	<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
	</interface>
	<interface type='bridge'>
	<mac address='52:54:00:e6:70:f8'/>
	<source bridge='nsx-managed'/>
	<virtualport type='openvswitch'>
	<parameters interfaceid='df55d7eb-5f25-43db-8bf8-f67b259bf51b'/>
	</virtualport>
	<model type='virtio'/>
	<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
	</interface>

view raw gistfile1.txt hosted with ❤ by GitHub

	<interface type='bridge'>
	<mac address='52:54:00:8c:30:e1'/>
	<source bridge='breth0'/>
	<virtualport type='openvswitch'>
	<parameters interfaceid='63bc2fbc-cfca-4917-9ae5-2d3a02b2504c'/>
	</virtualport>
	<model type='virtio'/>
	<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
	</interface>
	<interface type='bridge'>
	<mac address='52:54:00:e6:70:f8'/>
	<source bridge='nsx-managed'/>
	<virtualport type='openvswitch'>
	<parameters interfaceid='df55d7eb-5f25-43db-8bf8-f67b259bf51b'/>
	</virtualport>
	<model type='virtio'/>
	<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
	</interface>

view raw gistfile1.txt hosted with ❤ by GitHub

If you clone this VM using virt-clone utility, then the new VM will have the same interface id

If you need new interfaceid for every clone, then some libvirt py files will need change:

1) /usr/share/virt-manager/virtinst/deviceinterface.py

class VirtualPort(XMLBuilder):

    _XML_ROOT_NAME = "virtualport"

    type = XMLProperty("./@type")

    managerid = XMLProperty("./parameters/@managerid", is_int

    typeid = XMLProperty("./parameters/@typeid", is_int=True)

    typeidversion = XMLProperty("./parameters/@typeidversion"

    instanceid = XMLProperty("./parameters/@instanceid")

    interfaceid = XMLProperty("./parameters/@interfaceid")   <--- added="" div="" newly="">

2) /usr/share/virt-manager/virtinst/cloner.py

import uuid

and following line:

for iface in self._guest.get_devices("interface"):

    iface.target_dev = None

    if clone_macs:

        mac = clone_macs.pop()

    else:

        mac = VirtualNetworkInterface.generate_mac(self.conn)

    iface.macaddr = mac
    if iface.virtualport.type:

        iface.virtualport.interfaceid = uuid.uuid4() <--- added="" div="" newly="">