Example #1
0
    def add_routing_instance(self, ri_conf):
        ri_name = ri_conf.get("ri_name")
        vn = ri_conf.get("vn")
        is_l2 = ri_conf.get("is_l2", False)
        is_l2_l3 = ri_conf.get("is_l2_l3", False)
        import_targets = ri_conf.get("import_targets", set())
        export_targets = ri_conf.get("export_targets", set())
        prefixes = ri_conf.get("prefixes", [])
        gateways = ri_conf.get("gateways", [])
        router_external = ri_conf.get("router_external", False)
        interfaces = ri_conf.get("interfaces", [])
        vni = ri_conf.get("vni", None)
        fip_map = ri_conf.get("fip_map", None)
        network_id = ri_conf.get("network_id", None)
        static_routes = ri_conf.get("static_routes", {})
        no_vrf_table_label = ri_conf.get("no_vrf_table_label", False)
        restrict_proxy_arp = ri_conf.get("restrict_proxy_arp", False)
        highest_enapsulation_priority = \
                  ri_conf.get("highest_enapsulation_priority") or "MPLSoGRE"

        self.routing_instances[ri_name] = ri_conf
        ri_config = self.ri_config or RoutingInstances(
            comment=DMUtils.routing_instances_comment())
        policy_config = self.policy_config or PolicyOptions(
            comment=DMUtils.policy_options_comment())
        ri = Instance(name=ri_name)
        if vn:
            is_nat = True if fip_map else False
            ri.set_comment(DMUtils.vn_ri_comment(vn, is_l2, is_l2_l3, is_nat))
        ri_config.add_instance(ri)
        ri_opt = None
        if router_external and is_l2 == False:
            ri_opt = RoutingInstanceRoutingOptions(static=Static(route=[
                Route(name="0.0.0.0/0",
                      next_table="inet.0",
                      comment=DMUtils.public_vrf_route_comment())
            ]))
            ri.set_routing_options(ri_opt)

        # for both l2 and l3
        ri.set_vrf_import(DMUtils.make_import_name(ri_name))
        ri.set_vrf_export(DMUtils.make_export_name(ri_name))

        has_ipv6_prefixes = DMUtils.has_ipv6_prefixes(prefixes)
        has_ipv4_prefixes = DMUtils.has_ipv4_prefixes(prefixes)

        if not is_l2:
            if ri_opt is None:
                ri_opt = RoutingInstanceRoutingOptions()
                ri.set_routing_options(ri_opt)
            if prefixes and fip_map is None:
                static_config = ri_opt.get_static()
                if not static_config:
                    static_config = Static()
                    ri_opt.set_static(static_config)
                rib_config_v6 = None
                static_config_v6 = None
                for prefix in prefixes:
                    if ':' in prefix and not rib_config_v6:
                        static_config_v6 = Static()
                        rib_config_v6 = RIB(name=ri_name + ".inet6.0")
                        rib_config_v6.set_static(static_config_v6)
                        ri_opt.set_rib(rib_config_v6)
                    if ':' in prefix:
                        static_config_v6.add_route(
                            Route(name=prefix, discard=''))
                    else:
                        static_config.add_route(Route(name=prefix, discard=''))
                    if router_external:
                        self.add_to_global_ri_opts(prefix)

            ri.set_instance_type("vrf")
            if not no_vrf_table_label:
                ri.set_vrf_table_label('')  # only for l3
            if fip_map is None:
                for interface in interfaces:
                    ri.add_interface(Interface(name=interface.name))
            if static_routes:
                self.add_static_routes(ri_opt, static_routes)
            if has_ipv4_prefixes:
                ri_opt.set_auto_export(
                    AutoExport(family=Family(inet=FamilyInet(unicast=''))))
            if has_ipv6_prefixes:
                ri_opt.set_auto_export(
                    AutoExport(family=Family(inet6=FamilyInet6(unicast=''))))
        else:
            if highest_enapsulation_priority == "VXLAN":
                ri.set_instance_type("virtual-switch")
            elif highest_enapsulation_priority in ["MPLSoGRE", "MPLSoUDP"]:
                ri.set_instance_type("evpn")

        if fip_map is not None:
            if ri_opt is None:
                ri_opt = RoutingInstanceRoutingOptions()
                ri.set_routing_options(ri_opt)
            static_config = ri_opt.get_static()
            if not static_config:
                static_config = Static()
                ri_opt.set_static(static_config)
            static_config.add_route(
                Route(name="0.0.0.0/0",
                      next_hop=interfaces[0].name,
                      comment=DMUtils.fip_ingress_comment()))
            ri.add_interface(Interface(name=interfaces[0].name))

            public_vrf_ips = {}
            for pip in fip_map.values():
                if pip["vrf_name"] not in public_vrf_ips:
                    public_vrf_ips[pip["vrf_name"]] = set()
                public_vrf_ips[pip["vrf_name"]].add(pip["floating_ip"])

            for public_vrf, fips in public_vrf_ips.items():
                ri_public = Instance(name=public_vrf)
                ri_config.add_instance(ri_public)
                ri_public.add_interface(Interface(name=interfaces[1].name))

                ri_opt = RoutingInstanceRoutingOptions()
                ri_public.set_routing_options(ri_opt)
                static_config = Static()
                ri_opt.set_static(static_config)

                for fip in fips:
                    static_config.add_route(
                        Route(name=fip + "/32",
                              next_hop=interfaces[1].name,
                              comment=DMUtils.fip_egress_comment()))

        # add policies for export route targets
        ps = PolicyStatement(name=DMUtils.make_export_name(ri_name))
        ps.set_comment(DMUtils.vn_ps_comment(vn, "Export"))
        then = Then()
        ps.set_term(Term(name="t1", then=then))
        for route_target in export_targets:
            comm = Community(
                add='',
                community_name=DMUtils.make_community_name(route_target))
            then.add_community(comm)
        if fip_map is not None:
            # for nat instance
            then.set_reject('')
        else:
            then.set_accept('')
        policy_config.add_policy_statement(ps)

        # add policies for import route targets
        ps = PolicyStatement(name=DMUtils.make_import_name(ri_name))
        ps.set_comment(DMUtils.vn_ps_comment(vn, "Import"))
        from_ = From()
        term = Term(name="t1", fromxx=from_)
        ps.set_term(term)
        for route_target in import_targets:
            from_.add_community(DMUtils.make_community_name(route_target))
        term.set_then(Then(accept=''))
        ps.set_then(Then(reject=''))
        policy_config.add_policy_statement(ps)

        # add firewall config for public VRF
        forwarding_options_config = self.forwarding_options_config
        firewall_config = self.firewall_config
        if router_external and is_l2 == False:
            forwarding_options_config = (
                self.forwarding_options_config
                or ForwardingOptions(DMUtils.forwarding_options_comment()))
            firewall_config = self.firewall_config or Firewall(
                DMUtils.firewall_comment())
            if has_ipv4_prefixes and not self.inet4_forwarding_filter:
                #create single instance inet4 filter
                self.inet4_forwarding_filter = self.add_inet_public_vrf_filter(
                    forwarding_options_config, firewall_config, "inet")
            if has_ipv6_prefixes and not self.inet6_forwarding_filter:
                #create single instance inet6 filter
                self.inet6_forwarding_filter = self.add_inet_public_vrf_filter(
                    forwarding_options_config, firewall_config, "inet6")
            if has_ipv4_prefixes:
                #add terms to inet4 filter
                term = self.add_inet_filter_term(ri_name, prefixes, "inet4")
                # insert before the last term
                terms = self.inet4_forwarding_filter.get_term()
                terms = [term] + (terms or [])
                self.inet4_forwarding_filter.set_term(terms)
            if has_ipv6_prefixes:
                #add terms to inet6 filter
                term = self.add_inet_filter_term(ri_name, prefixes, "inet6")
                # insert before the last term
                terms = self.inet6_forwarding_filter.get_term()
                terms = [term] + (terms or [])
                self.inet6_forwarding_filter.set_term(terms)

        if fip_map is not None:
            firewall_config = firewall_config or Firewall(
                DMUtils.firewall_comment())
            f = FirewallFilter(
                name=DMUtils.make_private_vrf_filter_name(ri_name))
            f.set_comment(DMUtils.vn_firewall_comment(vn, "private"))
            ff = firewall_config.get_family()
            if not ff:
                ff = FirewallFamily()
                firewall_config.set_family(ff)
            inet = ff.get_inet()
            if not inet:
                inet = FirewallInet()
                ff.set_inet(inet)
            inet.add_filter(f)

            term = Term(name=DMUtils.make_vrf_term_name(ri_name))
            from_ = From()
            for fip_user_ip in fip_map.keys():
                from_.add_source_address(fip_user_ip)
            term.set_from(from_)
            term.set_then(Then(routing_instance=[ri_name]))
            f.add_term(term)

            term = Term(name="default-term", then=Then(accept=''))
            f.add_term(term)

            interfaces_config = self.interfaces_config or Interfaces(
                comment=DMUtils.interfaces_comment())
            irb_intf = Interface(name="irb")
            interfaces_config.add_interface(irb_intf)

            intf_unit = Unit(name=str(network_id),
                             comment=DMUtils.vn_irb_fip_inet_comment(vn))
            if restrict_proxy_arp:
                intf_unit.set_proxy_arp(ProxyArp(restricted=''))
            inet = FamilyInet()
            inet.set_filter(
                InetFilter(
                    input=DMUtils.make_private_vrf_filter_name(ri_name)))
            intf_unit.set_family(Family(inet=inet))
            irb_intf.add_unit(intf_unit)

        # add L2 EVPN and BD config
        bd_config = None
        interfaces_config = self.interfaces_config
        proto_config = self.proto_config
        if (is_l2 and vni is not None
                and self.is_family_configured(self.bgp_params, "e-vpn")):
            ri.set_vtep_source_interface("lo0.0")
            if highest_enapsulation_priority == "VXLAN":
                bd_config = BridgeDomains()
                ri.set_bridge_domains(bd_config)
                bd = Domain(name=DMUtils.make_bridge_name(vni),
                            vlan_id='none',
                            vxlan=VXLan(vni=vni))
                bd.set_comment(DMUtils.vn_bd_comment(vn, "VXLAN"))
                bd_config.add_domain(bd)
                for interface in interfaces:
                    bd.add_interface(Interface(name=interface.name))
                if is_l2_l3:
                    # network_id is unique, hence irb
                    bd.set_routing_interface("irb." + str(network_id))
                ri.set_protocols(
                    RoutingInstanceProtocols(evpn=Evpn(
                        encapsulation='vxlan', extended_vni_list='all')))
            elif highest_enapsulation_priority in ["MPLSoGRE", "MPLSoUDP"]:
                ri.set_vlan_id('none')
                if is_l2_l3:
                    # network_id is unique, hence irb
                    ri.set_routing_interface("irb." + str(network_id))
                evpn = Evpn()
                evpn.set_comment(
                    DMUtils.vn_evpn_comment(vn, highest_enapsulation_priority))
                for interface in interfaces:
                    evpn.add_interface(Interface(name=interface.name))
                ri.set_protocols(RoutingInstanceProtocols(evpn=evpn))

            interfaces_config = self.interfaces_config or Interfaces(
                comment=DMUtils.interfaces_comment())
            if is_l2_l3:
                irb_intf = Interface(name='irb', gratuitous_arp_reply='')
                interfaces_config.add_interface(irb_intf)
                if gateways is not None:
                    intf_unit = Unit(name=str(network_id),
                                     comment=DMUtils.vn_irb_comment(
                                         vn, False, is_l2_l3))
                    irb_intf.add_unit(intf_unit)
                    family = Family()
                    intf_unit.set_family(family)
                    inet = None
                    inet6 = None
                    for (irb_ip, gateway) in gateways:
                        if ':' in irb_ip:
                            if not inet6:
                                inet6 = FamilyInet6()
                                family.set_inet6(inet6)
                            addr = Address()
                            inet6.add_address(addr)
                        else:
                            if not inet:
                                inet = FamilyInet()
                                family.set_inet(inet)
                            addr = Address()
                            inet.add_address(addr)
                        addr.set_name(irb_ip)
                        addr.set_comment(DMUtils.irb_ip_comment(irb_ip))
                        if len(gateway) and gateway != '0.0.0.0':
                            addr.set_virtual_gateway_address(gateway)

            self.build_l2_evpn_interface_config(interfaces_config, interfaces,
                                                vn)

        if (not is_l2 and not is_l2_l3 and gateways):
            interfaces_config = self.interfaces_config or Interfaces(
                comment=DMUtils.interfaces_comment())
            ifl_num = str(1000 + int(network_id))
            lo_intf = Interface(name="lo0")
            interfaces_config.add_interface(lo_intf)
            intf_unit = Unit(name=ifl_num,
                             comment=DMUtils.l3_lo_intf_comment(vn))
            lo_intf.add_unit(intf_unit)
            family = Family()
            intf_unit.set_family(family)
            inet = None
            inet6 = None
            for (lo_ip, _) in gateways:
                (ip, _) = lo_ip.split('/')
                if ':' in lo_ip:
                    if not inet6:
                        inet6 = FamilyInet6()
                        family.set_inet6(inet6)
                    addr = Address()
                    inet6.add_address(addr)
                    lo_ip = ip + '/' + '128'
                else:
                    if not inet:
                        inet = FamilyInet()
                        family.set_inet(inet)
                    addr = Address()
                    inet.add_address(addr)
                    lo_ip = ip + '/' + '32'
                addr.set_name(lo_ip)
                addr.set_comment(DMUtils.lo0_ip_comment(lo_ip))
            ri.add_interface(
                Interface(name="lo0." + ifl_num,
                          comment=DMUtils.lo0_ri_intf_comment(vn)))

        # fip services config
        services_config = self.services_config
        if fip_map is not None:
            services_config = self.services_config or Services()
            services_config.set_comment(DMUtils.services_comment())
            service_name = DMUtils.make_services_set_name(ri_name)
            service_set = ServiceSet(name=service_name)
            service_set.set_comment(DMUtils.service_set_comment(vn))
            services_config.add_service_set(service_set)
            nat_rule = NATRules(name=service_name + "-sn-rule")
            service_set.add_nat_rules(
                NATRules(name=DMUtils.make_snat_rule_name(ri_name),
                         comment=DMUtils.service_set_nat_rule_comment(
                             vn, "SNAT")))
            service_set.add_nat_rules(
                NATRules(name=DMUtils.make_dnat_rule_name(ri_name),
                         comment=DMUtils.service_set_nat_rule_comment(
                             vn, "DNAT")))
            next_hop_service = NextHopService(
                inside_service_interface=interfaces[0].name,
                outside_service_interface=interfaces[1].name)
            service_set.set_next_hop_service(next_hop_service)

            nat = NAT(allow_overlapping_nat_pools='')
            nat.set_comment(DMUtils.nat_comment())
            services_config.add_nat(nat)
            snat_rule = Rule(name=DMUtils.make_snat_rule_name(ri_name),
                             match_direction="input")
            snat_rule.set_comment(DMUtils.snat_rule_comment())
            nat.add_rule(snat_rule)
            dnat_rule = Rule(name=DMUtils.make_dnat_rule_name(ri_name),
                             match_direction="output")
            dnat_rule.set_comment(DMUtils.dnat_rule_comment())
            nat.add_rule(dnat_rule)

            for pip, fip_vn in fip_map.items():
                fip = fip_vn["floating_ip"]
                term = Term(name=DMUtils.make_ip_term_name(pip))
                snat_rule.set_term(term)
                # private ip
                from_ = From(source_address=[pip + "/32"])
                term.set_from(from_)
                # public ip
                then_ = Then()
                term.set_then(then_)
                translated = Translated(
                    source_prefix=fip + "/32",
                    translation_type=TranslationType(basic_nat44=''))
                then_.set_translated(translated)

                term = Term(name=DMUtils.make_ip_term_name(fip))
                dnat_rule.set_term(term)

                # public ip
                from_ = From(destination_address=[fip + "/32"])
                term.set_from(from_)
                # private ip
                then_ = Then()
                term.set_then(then_)
                translated = Translated(
                    destination_prefix=pip + "/32",
                    translation_type=TranslationType(dnat_44=''))
                then_.set_translated(translated)

            interfaces_config = self.interfaces_config or Interfaces(
                comment=DMUtils.interfaces_comment())
            si_intf = Interface(name=interfaces[0].ifd_name,
                                comment=DMUtils.service_ifd_comment())
            interfaces_config.add_interface(si_intf)

            intf_unit = Unit(name=interfaces[0].unit,
                             comment=DMUtils.service_intf_comment("Ingress"))
            si_intf.add_unit(intf_unit)
            family = Family(inet=FamilyInet())
            intf_unit.set_family(family)
            intf_unit.set_service_domain("inside")

            intf_unit = Unit(name=interfaces[1].unit,
                             comment=DMUtils.service_intf_comment("Egress"))
            si_intf.add_unit(intf_unit)
            family = Family(inet=FamilyInet())
            intf_unit.set_family(family)
            intf_unit.set_service_domain("outside")

        self.forwarding_options_config = forwarding_options_config
        self.firewall_config = firewall_config
        self.policy_config = policy_config
        self.proto_config = proto_config
        self.interfaces_config = interfaces_config
        self.services_config = services_config
        self.route_targets |= import_targets | export_targets
        self.ri_config = ri_config
Example #2
0
    def add_routing_instance(self, ri_conf):
        ri_name = ri_conf.get("ri_name")
        vn = ri_conf.get("vn")
        si = ri_conf.get("si")
        is_l2 = ri_conf.get("is_l2", False)
        is_l2_l3 = ri_conf.get("is_l2_l3", False)
        import_targets = ri_conf.get("import_targets", set())
        export_targets = ri_conf.get("export_targets", set())
        prefixes = ri_conf.get("prefixes", [])
        gateways = ri_conf.get("gateways", [])
        router_external = ri_conf.get("router_external", False)
        interfaces = ri_conf.get("interfaces", [])
        vni = ri_conf.get("vni", None)
        fip_map = ri_conf.get("fip_map", None)
        network_id = ri_conf.get("network_id", None)
        static_routes = ri_conf.get("static_routes", {})
        no_vrf_table_label = ri_conf.get("no_vrf_table_label", False)
        restrict_proxy_arp = ri_conf.get("restrict_proxy_arp", False)
        highest_enapsulation_priority = \
                  ri_conf.get("highest_enapsulation_priority") or "MPLSoGRE"

        self.routing_instances[ri_name] = ri_conf
        ri_config = self.ri_config or RoutingInstances(comment=DMUtils.routing_instances_comment())
        policy_config = self.policy_config or PolicyOptions(comment=DMUtils.policy_options_comment())
        ri = Instance(name=ri_name)
        if vn:
            is_nat = True if fip_map else False
            ri.set_comment(DMUtils.vn_ri_comment(vn, is_l2, is_l2_l3, is_nat, router_external))
        elif si:
            ri.set_comment(DMUtils.si_ri_comment(si))
        ri_config.add_instance(ri)
        ri_opt = None
        if router_external and is_l2 == False:
            ri_opt = RoutingInstanceRoutingOptions(
                         static=Static(route=[Route(name="0.0.0.0/0",
                                                    next_table="inet.0",
                                                    comment=DMUtils.public_vrf_route_comment())]))
            ri.set_routing_options(ri_opt)

        # for both l2 and l3
        ri.set_vrf_import(DMUtils.make_import_name(ri_name))
        ri.set_vrf_export(DMUtils.make_export_name(ri_name))

        has_ipv6_prefixes = DMUtils.has_ipv6_prefixes(prefixes)
        has_ipv4_prefixes = DMUtils.has_ipv4_prefixes(prefixes)

        if not is_l2:
            if ri_opt is None:
                ri_opt = RoutingInstanceRoutingOptions()
                ri.set_routing_options(ri_opt)
            if prefixes and fip_map is None:
                static_config = ri_opt.get_static()
                if not static_config:
                    static_config = Static()
                    ri_opt.set_static(static_config)
                rib_config_v6 = None
                static_config_v6 = None
                for prefix in prefixes:
                    if ':' in prefix and not rib_config_v6:
                        static_config_v6 = Static()
                        rib_config_v6 = RIB(name=ri_name + ".inet6.0")
                        rib_config_v6.set_static(static_config_v6)
                        ri_opt.set_rib(rib_config_v6)
                    if ':' in prefix:
                        static_config_v6.add_route(Route(name=prefix, discard=''))
                    else:
                        static_config.add_route(Route(name=prefix, discard=''))
                    if router_external:
                        self.add_to_global_ri_opts(prefix)

            ri.set_instance_type("vrf")
            if not no_vrf_table_label:
                ri.set_vrf_table_label('')  # only for l3
            if fip_map is None:
                for interface in interfaces:
                    ri.add_interface(Interface(name=interface.name))
            if static_routes:
                self.add_static_routes(ri_opt, static_routes)
            family = Family()
            if has_ipv4_prefixes:
                family.set_inet(FamilyInet(unicast=''))
            if has_ipv6_prefixes:
                family.set_inet6(FamilyInet6(unicast=''))
            if has_ipv4_prefixes or has_ipv6_prefixes:
                auto_export = AutoExport(family=family)
                ri_opt.set_auto_export(auto_export)
        else:
            if highest_enapsulation_priority == "VXLAN":
                ri.set_instance_type("virtual-switch")
            elif highest_enapsulation_priority in ["MPLSoGRE", "MPLSoUDP"]:
                ri.set_instance_type("evpn")

        if fip_map is not None:
            if ri_opt is None:
                ri_opt = RoutingInstanceRoutingOptions()
                ri.set_routing_options(ri_opt)
            static_config = ri_opt.get_static()
            if not static_config:
                static_config = Static()
                ri_opt.set_static(static_config)
            static_config.add_route(Route(name="0.0.0.0/0",
                                          next_hop=interfaces[0].name,
                                          comment=DMUtils.fip_ingress_comment()))
            ri.add_interface(Interface(name=interfaces[0].name))

            public_vrf_ips = {}
            for pip in fip_map.values():
                if pip["vrf_name"] not in public_vrf_ips:
                    public_vrf_ips[pip["vrf_name"]] = set()
                public_vrf_ips[pip["vrf_name"]].add(pip["floating_ip"])

            for public_vrf, fips in public_vrf_ips.items():
                ri_public = Instance(name=public_vrf)
                ri_config.add_instance(ri_public)
                ri_public.add_interface(Interface(name=interfaces[1].name))

                ri_opt = RoutingInstanceRoutingOptions()
                ri_public.set_routing_options(ri_opt)
                static_config = Static()
                ri_opt.set_static(static_config)

                for fip in fips:
                    static_config.add_route(Route(name=fip + "/32",
                                                  next_hop=interfaces[1].name,
                                                  comment=DMUtils.fip_egress_comment()))

        # add policies for export route targets
        ps = PolicyStatement(name=DMUtils.make_export_name(ri_name))
        if vn:
            ps.set_comment(DMUtils.vn_ps_comment(vn, "Export"))
        elif si:
            ps.set_comment(DMUtils.si_ps_comment(si, "Export"))
        then = Then()
        ps.add_term(Term(name="t1", then=then))
        for route_target in export_targets:
            comm = Community(add='',
                             community_name=DMUtils.make_community_name(route_target))
            then.add_community(comm)
        if fip_map is not None:
            # for nat instance
            then.set_reject('')
        else:
            then.set_accept('')
        policy_config.add_policy_statement(ps)

        # add policies for import route targets
        ps = PolicyStatement(name=DMUtils.make_import_name(ri_name))
        if vn:
            ps.set_comment(DMUtils.vn_ps_comment(vn, "Import"))
        elif si:
            ps.set_comment(DMUtils.si_ps_comment(si, "Import"))
        from_ = From()
        term = Term(name="t1", fromxx=from_)
        ps.add_term(term)
        for route_target in import_targets:
            from_.add_community(DMUtils.make_community_name(route_target))
        term.set_then(Then(accept=''))
        ps.set_then(Then(reject=''))
        policy_config.add_policy_statement(ps)

        # add firewall config for public VRF
        forwarding_options_config = self.forwarding_options_config
        firewall_config = self.firewall_config
        if router_external and is_l2 == False:
            forwarding_options_config = (self.forwarding_options_config or
                                           ForwardingOptions(DMUtils.forwarding_options_comment()))
            firewall_config = self.firewall_config or Firewall(DMUtils.firewall_comment())
            if has_ipv4_prefixes and not self.inet4_forwarding_filter:
                #create single instance inet4 filter
                self.inet4_forwarding_filter = self.add_inet_public_vrf_filter(
                                                       forwarding_options_config,
                                                       firewall_config, "inet")
            if has_ipv6_prefixes and not self.inet6_forwarding_filter:
                #create single instance inet6 filter
                self.inet6_forwarding_filter = self.add_inet_public_vrf_filter(
                                                       forwarding_options_config,
                                                       firewall_config, "inet6")
            if has_ipv4_prefixes:
                #add terms to inet4 filter
                term = self.add_inet_filter_term(ri_name, prefixes, "inet4")
                # insert before the last term
                terms = self.inet4_forwarding_filter.get_term()
                terms = [term] + (terms or [])
                self.inet4_forwarding_filter.set_term(terms)
            if has_ipv6_prefixes:
                #add terms to inet6 filter
                term = self.add_inet_filter_term(ri_name, prefixes, "inet6")
                # insert before the last term
                terms = self.inet6_forwarding_filter.get_term()
                terms = [term] + (terms or [])
                self.inet6_forwarding_filter.set_term(terms)

        if fip_map is not None:
            firewall_config = firewall_config or Firewall(DMUtils.firewall_comment())
            f = FirewallFilter(name=DMUtils.make_private_vrf_filter_name(ri_name))
            f.set_comment(DMUtils.vn_firewall_comment(vn, "private"))
            ff = firewall_config.get_family()
            if not ff:
                ff = FirewallFamily()
                firewall_config.set_family(ff)
            inet = ff.get_inet()
            if not inet:
                inet = FirewallInet()
                ff.set_inet(inet)
            inet.add_filter(f)

            term = Term(name=DMUtils.make_vrf_term_name(ri_name))
            from_ = From()
            for fip_user_ip in fip_map.keys():
                from_.add_source_address(fip_user_ip)
            term.set_from(from_)
            term.set_then(Then(routing_instance=[ri_name]))
            f.add_term(term)

            term = Term(name="default-term", then=Then(accept=''))
            f.add_term(term)

            interfaces_config = self.interfaces_config or Interfaces(comment=DMUtils.interfaces_comment())
            irb_intf = Interface(name="irb")
            interfaces_config.add_interface(irb_intf)

            intf_unit = Unit(name=str(network_id),
                             comment=DMUtils.vn_irb_fip_inet_comment(vn))
            if restrict_proxy_arp:
                intf_unit.set_proxy_arp(ProxyArp(restricted=''))
            inet = FamilyInet()
            inet.set_filter(InetFilter(input=DMUtils.make_private_vrf_filter_name(ri_name)))
            intf_unit.set_family(Family(inet=inet))
            irb_intf.add_unit(intf_unit)

        # add L2 EVPN and BD config
        bd_config = None
        interfaces_config = self.interfaces_config
        proto_config = self.proto_config
        if (is_l2 and vni is not None and
                self.is_family_configured(self.bgp_params, "e-vpn")):
            ri.set_vtep_source_interface("lo0.0")
            if highest_enapsulation_priority == "VXLAN":
                bd_config = BridgeDomains()
                ri.set_bridge_domains(bd_config)
                bd = Domain(name=DMUtils.make_bridge_name(vni), vlan_id='none', vxlan=VXLan(vni=vni))
                bd.set_comment(DMUtils.vn_bd_comment(vn, "VXLAN"))
                bd_config.add_domain(bd)
                for interface in interfaces:
                     bd.add_interface(Interface(name=interface.name))
                if is_l2_l3:
                    # network_id is unique, hence irb
                    bd.set_routing_interface("irb." + str(network_id))
                ri.set_protocols(RoutingInstanceProtocols(
                               evpn=Evpn(encapsulation='vxlan', extended_vni_list='all')))
            elif highest_enapsulation_priority in ["MPLSoGRE", "MPLSoUDP"]:
                ri.set_vlan_id('none')
                if is_l2_l3:
                    # network_id is unique, hence irb
                    ri.set_routing_interface("irb." + str(network_id))
                evpn = Evpn()
                evpn.set_comment(DMUtils.vn_evpn_comment(vn, highest_enapsulation_priority))
                for interface in interfaces:
                     evpn.add_interface(Interface(name=interface.name))
                ri.set_protocols(RoutingInstanceProtocols(evpn=evpn))

            interfaces_config = self.interfaces_config or Interfaces(comment=DMUtils.interfaces_comment())
            if is_l2_l3:
                irb_intf = Interface(name='irb', gratuitous_arp_reply='')
                interfaces_config.add_interface(irb_intf)
                if gateways is not None:
                    intf_unit = Unit(name=str(network_id),
                                     comment=DMUtils.vn_irb_comment(vn, False, is_l2_l3))
                    irb_intf.add_unit(intf_unit)
                    family = Family()
                    intf_unit.set_family(family)
                    inet = None
                    inet6 = None
                    for (irb_ip, gateway) in gateways:
                        if ':' in irb_ip:
                            if not inet6:
                                inet6 = FamilyInet6()
                                family.set_inet6(inet6)
                            addr = Address()
                            inet6.add_address(addr)
                        else:
                            if not inet:
                                inet = FamilyInet()
                                family.set_inet(inet)
                            addr = Address()
                            inet.add_address(addr)
                        addr.set_name(irb_ip)
                        addr.set_comment(DMUtils.irb_ip_comment(irb_ip))
                        if len(gateway) and gateway != '0.0.0.0':
                            addr.set_virtual_gateway_address(gateway)

            self.build_l2_evpn_interface_config(interfaces_config, interfaces, vn)

        if (not is_l2 and not is_l2_l3 and gateways):
            interfaces_config = self.interfaces_config or Interfaces(comment=DMUtils.interfaces_comment())
            ifl_num = str(1000 + int(network_id))
            lo_intf = Interface(name="lo0")
            interfaces_config.add_interface(lo_intf)
            intf_unit = Unit(name=ifl_num, comment=DMUtils.l3_lo_intf_comment(vn))
            lo_intf.add_unit(intf_unit)
            family = Family()
            intf_unit.set_family(family)
            inet = None
            inet6 = None
            for (lo_ip, _) in gateways:
                subnet = lo_ip
                (ip, _) = lo_ip.split('/')
                if ':' in lo_ip:
                    if not inet6:
                        inet6 = FamilyInet6()
                        family.set_inet6(inet6)
                    addr = Address()
                    inet6.add_address(addr)
                    lo_ip = ip + '/' + '128'
                else:
                    if not inet:
                        inet = FamilyInet()
                        family.set_inet(inet)
                    addr = Address()
                    inet.add_address(addr)
                    lo_ip = ip + '/' + '32'
                addr.set_name(lo_ip)
                addr.set_comment(DMUtils.lo0_ip_comment(subnet))
            ri.add_interface(Interface(name="lo0." + ifl_num,
                                       comment=DMUtils.lo0_ri_intf_comment(vn)))

        # fip services config
        services_config = self.services_config
        if fip_map is not None:
            services_config = self.services_config or Services()
            services_config.set_comment(DMUtils.services_comment())
            service_name = DMUtils.make_services_set_name(ri_name)
            service_set = ServiceSet(name=service_name)
            service_set.set_comment(DMUtils.service_set_comment(vn))
            services_config.add_service_set(service_set)
            nat_rule = NATRules(name=service_name + "-sn-rule")
            service_set.add_nat_rules(NATRules(name=DMUtils.make_snat_rule_name(ri_name),
                                               comment=DMUtils.service_set_nat_rule_comment(vn, "SNAT")))
            service_set.add_nat_rules(NATRules(name=DMUtils.make_dnat_rule_name(ri_name),
                                               comment=DMUtils.service_set_nat_rule_comment(vn, "DNAT")))
            next_hop_service = NextHopService(inside_service_interface = interfaces[0].name,
                                              outside_service_interface = interfaces[1].name)
            service_set.set_next_hop_service(next_hop_service)

            nat = NAT(allow_overlapping_nat_pools='')
            nat.set_comment(DMUtils.nat_comment())
            services_config.add_nat(nat)
            snat_rule = Rule(name=DMUtils.make_snat_rule_name(ri_name),
                             match_direction="input")
            snat_rule.set_comment(DMUtils.snat_rule_comment())
            nat.add_rule(snat_rule)
            dnat_rule = Rule(name=DMUtils.make_dnat_rule_name(ri_name),
                             match_direction="output")
            dnat_rule.set_comment(DMUtils.dnat_rule_comment())
            nat.add_rule(dnat_rule)

            for pip, fip_vn in fip_map.items():
                fip = fip_vn["floating_ip"]
                term = Term(name=DMUtils.make_ip_term_name(pip))
                snat_rule.set_term(term)
                # private ip
                from_ = From(source_address=[pip + "/32"])
                term.set_from(from_)
                # public ip
                then_ = Then()
                term.set_then(then_)
                translated = Translated(source_prefix=fip + "/32",
                                        translation_type=TranslationType(basic_nat44=''))
                then_.set_translated(translated)

                term = Term(name=DMUtils.make_ip_term_name(fip))
                dnat_rule.set_term(term)

                # public ip
                from_ = From(destination_address=[fip + "/32"])
                term.set_from(from_)
                # private ip
                then_ = Then()
                term.set_then(then_)
                translated = Translated(destination_prefix=pip + "/32",
                                        translation_type=TranslationType(dnat_44=''))
                then_.set_translated(translated)

            interfaces_config = self.interfaces_config or Interfaces(comment=DMUtils.interfaces_comment())
            si_intf = Interface(name=interfaces[0].ifd_name,
                                comment=DMUtils.service_ifd_comment())
            interfaces_config.add_interface(si_intf)

            intf_unit = Unit(name=interfaces[0].unit,
                             comment=DMUtils.service_intf_comment("Ingress"))
            si_intf.add_unit(intf_unit)
            family = Family(inet=FamilyInet())
            intf_unit.set_family(family)
            intf_unit.set_service_domain("inside")

            intf_unit = Unit(name=interfaces[1].unit,
                             comment=DMUtils.service_intf_comment("Egress"))
            si_intf.add_unit(intf_unit)
            family = Family(inet=FamilyInet())
            intf_unit.set_family(family)
            intf_unit.set_service_domain("outside")

        self.forwarding_options_config = forwarding_options_config
        self.firewall_config = firewall_config
        self.policy_config = policy_config
        self.proto_config = proto_config
        self.interfaces_config = interfaces_config
        self.services_config = services_config
        self.route_targets |= import_targets | export_targets
        self.ri_config = ri_config