Device component - IETF L2VPN Driver:

            if access_priority is not None:

                availability = {}

                availability["access-priority"] = access_priority

                availability["single-active"] = [None]

                availability["single-active"] = None

                site_network_access["availability"] = availability

                constraint = {}

                constraint['constraint-type'] = 'end-to-end-diverse'

                constraint['target'] = {'all-other-accesses': [None]}

                constraint['target'] = {'all-other-accesses': None}

                access_diversity = {}

                access_diversity['constraints'] = {'constraint': []}