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authorDamjan Marion <damarion@cisco.com>2016-11-09 19:54:20 +0100
committerDave Barach <openvpp@barachs.net>2016-11-11 14:39:00 +0000
commit8b3191e6d715760deefe550b59c7d92be4b5cda9 (patch)
tree721dd977986d12864346081fec6b245ea5a250e0 /plugins/flowperpkt-plugin
parent0178d52384e0428368f1acf3163e664ecda7b64c (diff)
feature: convert all feature nodes to new feature infra
Change-Id: I34c527ba910fb282a95458b78d1d684eb337905e Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'plugins/flowperpkt-plugin')
-rw-r--r--plugins/flowperpkt-plugin/flowperpkt/flowperpkt.c24
-rw-r--r--plugins/flowperpkt-plugin/flowperpkt/flowperpkt.h3
-rw-r--r--plugins/flowperpkt-plugin/flowperpkt/node.c20
3 files changed, 11 insertions, 36 deletions
diff --git a/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.c b/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.c
index ac508582669..dbdb189865d 100644
--- a/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.c
+++ b/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.c
@@ -59,10 +59,10 @@ flowperpkt_main_t flowperpkt_main;
/* Define the per-interface configurable feature */
/* *INDENT-OFF* */
-VNET_IP4_TX_FEATURE_INIT (flow_perpacket, static) = {
+VNET_FEATURE_INIT (flow_perpacket, static) = {
+ .arc_name = "ip4-output",
.node_name = "flowperpkt",
- .runs_before = (char *[]){"interface-output", 0},
- .feature_index = &flowperpkt_main.ip4_tx_feature_index,
+ .runs_before = VNET_FEATURES ("interface-output"),
};
/* *INDENT-ON* */
@@ -249,11 +249,6 @@ flowperpkt_data_callback (flow_report_main_t * frm,
static int flowperpkt_tx_interface_add_del_feature
(flowperpkt_main_t * fm, u32 sw_if_index, int is_add)
{
- u32 ci;
- ip4_main_t *im = &ip4_main;
- ip_lookup_main_t *lm = &im->lookup_main;
- vnet_feature_config_main_t *cm = &lm->feature_config_mains[VNET_IP_TX_FEAT];
- u32 feature_index;
flow_report_main_t *frm = &flow_report_main;
vnet_flow_report_add_del_args_t _a, *a = &_a;
int rv;
@@ -276,18 +271,9 @@ static int flowperpkt_tx_interface_add_del_feature
}
}
- feature_index = fm->ip4_tx_feature_index;
+ vnet_feature_enable_disable ("ip4-output", "flowperpkt", sw_if_index,
+ is_add, 0, 0);
- ci = cm->config_index_by_sw_if_index[sw_if_index];
- ci = (is_add
- ? vnet_config_add_feature
- : vnet_config_del_feature)
- (fm->vlib_main, &cm->config_main,
- ci, feature_index, 0 /* config struct */ ,
- 0 /* sizeof config struct */ );
- cm->config_index_by_sw_if_index[sw_if_index] = ci;
-
- vnet_config_update_tx_feature_count (lm, cm, sw_if_index, is_add);
return 0;
}
diff --git a/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.h b/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.h
index 5ddba9ce1da..31e685eb68d 100644
--- a/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.h
+++ b/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.h
@@ -35,9 +35,6 @@ typedef struct
/** API message ID base */
u16 msg_id_base;
- /** ip4 feature index */
- u32 ip4_tx_feature_index;
-
/** Has the report been created? */
int report_created;
diff --git a/plugins/flowperpkt-plugin/flowperpkt/node.c b/plugins/flowperpkt-plugin/flowperpkt/node.c
index b01f2be3a05..86da3a1cf59 100644
--- a/plugins/flowperpkt-plugin/flowperpkt/node.c
+++ b/plugins/flowperpkt-plugin/flowperpkt/node.c
@@ -284,9 +284,6 @@ flowperpkt_node_fn (vlib_main_t * vm,
{
u32 n_left_from, *from, *to_next;
flowperpkt_next_t next_index;
- ip4_main_t *im = &ip4_main;
- ip_lookup_main_t *lm = &im->lookup_main;
- vnet_feature_config_main_t *cm = &lm->feature_config_mains[VNET_IP_TX_FEAT];
flowperpkt_main_t *fm = &flowperpkt_main;
u64 now;
@@ -337,14 +334,10 @@ flowperpkt_node_fn (vlib_main_t * vm,
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
-
- vnet_get_config_data (&cm->config_main,
- &b0->current_config_index,
- &next0, 0 /* sizeof config data */ );
-
- vnet_get_config_data (&cm->config_main,
- &b1->current_config_index,
- &next1, 0 /* sizeof config data */ );
+ vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_TX],
+ &next0, b0);
+ vnet_feature_next (vnet_buffer (b1)->sw_if_index[VLIB_TX],
+ &next1, b1);
ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
vnet_buffer (b0)->ip.save_rewrite_length);
@@ -413,9 +406,8 @@ flowperpkt_node_fn (vlib_main_t * vm,
b0 = vlib_get_buffer (vm, bi0);
- vnet_get_config_data (&cm->config_main,
- &b0->current_config_index,
- &next0, 0 /* sizeof config data */ );
+ vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_TX],
+ &next0, b0);
ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
vnet_buffer (b0)->ip.save_rewrite_length);
/a> 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 
import socket

import scapy.compat
from scapy.layers.inet import IP, UDP
from scapy.layers.inet6 import IPv6
from scapy.layers.l2 import Ether, GRE
from scapy.packet import Raw
from scapy.data import IP_PROTOS

from framework import VppTestCase
from util import ppp
from vpp_ip_route import VppIpRoute, VppRoutePath
from vpp_ip import INVALID_INDEX

""" TestLB is a subclass of  VPPTestCase classes.

 TestLB class defines Load Balancer test cases for:
  - IP4 to GRE4 encap on per-port vip case
  - IP4 to GRE6 encap on per-port vip case
  - IP6 to GRE4 encap on per-port vip case
  - IP6 to GRE6 encap on per-port vip case
  - IP4 to L3DSR encap on vip case
  - IP4 to L3DSR encap on per-port vip case
  - IP4 to NAT4 encap on per-port vip case
  - IP6 to NAT6 encap on per-port vip case

 As stated in comments below, GRE has issues with IPv6.
 All test cases involving IPv6 are executed, but
 received packets are not parsed and checked.

"""


class TestLB(VppTestCase):
    """ Load Balancer Test Case """

    @classmethod
    def setUpClass(cls):
        super(TestLB, cls).setUpClass()

        cls.ass = range(5)
        cls.packets = range(1)

        try:
            cls.create_pg_interfaces(range(2))
            cls.interfaces = list(cls.pg_interfaces)

            for i in cls.interfaces:
                i.admin_up()
                i.config_ip4()
                i.config_ip6()
                i.disable_ipv6_ra()
                i.resolve_arp()
                i.resolve_ndp()

            dst4 = VppIpRoute(cls, "10.0.0.0", 24,
                              [VppRoutePath(cls.pg1.remote_ip4,
                                            INVALID_INDEX)],
                              register=False)
            dst4.add_vpp_config()
            dst6 = VppIpRoute(cls, "2002::", 16,
                              [VppRoutePath(cls.pg1.remote_ip6,
                                            INVALID_INDEX)],
                              register=False)
            dst6.add_vpp_config()
            cls.vapi.lb_conf(ip4_src_address="39.40.41.42",
                             ip6_src_address="2004::1")
        except Exception:
            super(TestLB, cls).tearDownClass()
            raise

    @classmethod
    def tearDownClass(cls):
        super(TestLB, cls).tearDownClass()

    def tearDown(self):
        super(TestLB, self).tearDown()

    def show_commands_at_teardown(self):
        self.logger.info(self.vapi.cli("show lb vip verbose"))

    def getIPv4Flow(self, id):
        return (IP(dst="90.0.%u.%u" % (id / 255, id % 255),
                   src="40.0.%u.%u" % (id / 255, id % 255)) /
                UDP(sport=10000 + id, dport=20000))

    def getIPv6Flow(self, id):
        return (IPv6(dst="2001::%u" % (id), src="fd00:f00d:ffff::%u" % (id)) /
                UDP(sport=10000 + id, dport=20000))

    def generatePackets(self, src_if, isv4):
        self.reset_packet_infos()
        pkts = []
        for pktid in self.packets:
            info = self.create_packet_info(src_if, self.pg1)
            payload = self.info_to_payload(info)
            ip = self.getIPv4Flow(pktid) if isv4 else self.getIPv6Flow(pktid)
            packet = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
                      ip /
                      Raw(payload))
            self.extend_packet(packet, 128)
            info.data = packet.copy()
            pkts.append(packet)
        return pkts

    def checkInner(self, gre, isv4):
        IPver = IP if isv4 else IPv6
        self.assertEqual(gre.proto, 0x0800 if isv4 else 0x86DD)
        self.assertEqual(gre.flags, 0)
        self.assertEqual(gre.version, 0)
        inner = IPver(scapy.compat.raw(gre.payload))
        payload_info = self.payload_to_info(inner[Raw])
        self.info = self.packet_infos[payload_info.index]
        self.assertEqual(payload_info.src, self.pg0.sw_if_index)
        self.assertEqual(scapy.compat.raw(inner),
                         scapy.compat.raw(self.info.data[IPver]))

    def checkCapture(self, encap, isv4):
        self.pg0.assert_nothing_captured()
        out = self.pg1.get_capture(len(self.packets))

        load = [0] * len(self.ass)
        self.info = None
        for p in out:
            try:
                asid = 0
                gre = None
                if (encap == 'gre4'):
                    ip = p[IP]
                    asid = int(ip.dst.split(".")[3])
                    self.assertEqual(ip.version, 4)
                    self.assertEqual(ip.flags, 0)
                    self.assertEqual(ip.src, "39.40.41.42")
                    self.assertEqual(ip.dst, "10.0.0.%u" % asid)
                    self.assertEqual(ip.proto, 47)
                    self.assertEqual(len(ip.options), 0)
                    gre = p[GRE]
                    self.checkInner(gre, isv4)
                elif (encap == 'gre6'):
                    ip = p[IPv6]
                    asid = ip.dst.split(":")
                    asid = asid[len(asid) - 1]
                    asid = 0 if asid == "" else int(asid)
                    self.assertEqual(ip.version, 6)
                    self.assertEqual(ip.tc, 0)
                    self.assertEqual(ip.fl, 0)
                    self.assertEqual(ip.src, "2004::1")
                    self.assertEqual(
                        socket.inet_pton(socket.AF_INET6, ip.dst),
                        socket.inet_pton(socket.AF_INET6, "2002::%u" % asid)
                    )
                    self.assertEqual(ip.nh, 47)
                    # self.assertEqual(len(ip.options), 0)
                    gre = GRE(scapy.compat.raw(p[IPv6].payload))
                    self.checkInner(gre, isv4)
                elif (encap == 'l3dsr'):
                    ip = p[IP]
                    asid = int(ip.dst.split(".")[3])
                    self.assertEqual(ip.version, 4)
                    self.assertEqual(ip.flags, 0)
                    self.assertEqual(ip.dst, "10.0.0.%u" % asid)
                    self.assertEqual(ip.tos, 0x1c)
                    self.assertEqual(len(ip.options), 0)
                    self.assert_ip_checksum_valid(p)
                    if ip.proto == IP_PROTOS.tcp:
                        self.assert_tcp_checksum_valid(p)
                    elif ip.proto == IP_PROTOS.udp:
                        self.assert_udp_checksum_valid(p)
                elif (encap == 'nat4'):
                    ip = p[IP]
                    asid = int(ip.dst.split(".")[3])
                    self.assertEqual(ip.version, 4)
                    self.assertEqual(ip.flags, 0)
                    self.assertEqual(ip.dst, "10.0.0.%u" % asid)
                    self.assertEqual(ip.proto, 17)
                    self.assertEqual(len(ip.options), 0)
                    udp = p[UDP]
                    self.assertEqual(udp.dport, 3307)
                elif (encap == 'nat6'):
                    ip = p[IPv6]
                    asid = ip.dst.split(":")
                    asid = asid[len(asid) - 1]
                    asid = 0 if asid == "" else int(asid)
                    self.assertEqual(ip.version, 6)
                    self.assertEqual(ip.tc, 0)
                    self.assertEqual(ip.fl, 0)
                    self.assertEqual(
                        socket.inet_pton(socket.AF_INET6, ip.dst),
                        socket.inet_pton(socket.AF_INET6, "2002::%u" % asid)
                    )
                    self.assertEqual(ip.nh, 17)
                    self.assertGreaterEqual(ip.hlim, 63)
                    udp = UDP(scapy.compat.raw(p[IPv6].payload))
                    self.assertEqual(udp.dport, 3307)
                load[asid] += 1
            except:
                self.logger.error(ppp("Unexpected or invalid packet:", p))
                raise

        # This is just to roughly check that the balancing algorithm
        # is not completely biased.
        for asid in self.ass:
            if load[asid] < int(len(self.packets) / (len(self.ass) * 2)):
                self.logger.error(
                    "ASS is not balanced: load[%d] = %d" % (asid, load[asid]))
                raise Exception("Load Balancer algorithm is biased")

    def test_lb_ip4_gre4(self):
        """ Load Balancer IP4 GRE4 on vip case """
        try:
            self.vapi.cli(
                "lb vip 90.0.0.0/8 encap gre4")
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 10.0.0.%u"
                    % (asid))

            self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
            self.pg_enable_capture(self.pg_interfaces)
            self.pg_start()
            self.checkCapture(encap='gre4', isv4=True)

        finally:
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 10.0.0.%u del"
                    % (asid))
            self.vapi.cli(
                "lb vip 90.0.0.0/8 encap gre4 del")
            self.vapi.cli("test lb flowtable flush")

    def test_lb_ip6_gre4(self):
        """ Load Balancer IP6 GRE4 on vip case """

        try:
            self.vapi.cli(
                "lb vip 2001::/16 encap gre4")
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 2001::/16 10.0.0.%u"
                    % (asid))

            self.pg0.add_stream(self.generatePackets(self.pg0, isv4=False))
            self.pg_enable_capture(self.pg_interfaces)
            self.pg_start()

            self.checkCapture(encap='gre4', isv4=False)
        finally:
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 2001::/16 10.0.0.%u del"
                    % (asid))
            self.vapi.cli(
                "lb vip 2001::/16 encap gre4 del")
            self.vapi.cli("test lb flowtable flush")

    def test_lb_ip4_gre6(self):
        """ Load Balancer IP4 GRE6 on vip case """
        try:
            self.vapi.cli(
                "lb vip 90.0.0.0/8 encap gre6")
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 2002::%u"
                    % (asid))

            self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
            self.pg_enable_capture(self.pg_interfaces)
            self.pg_start()

            self.checkCapture(encap='gre6', isv4=True)
        finally:
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 2002::%u del"
                    % (asid))
            self.vapi.cli(
                "lb vip 90.0.0.0/8 encap gre6 del")
            self.vapi.cli("test lb flowtable flush")

    def test_lb_ip6_gre6(self):
        """ Load Balancer IP6 GRE6 on vip case """
        try:
            self.vapi.cli(
                "lb vip 2001::/16 encap gre6")
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 2001::/16 2002::%u"
                    % (asid))

            self.pg0.add_stream(self.generatePackets(self.pg0, isv4=False))
            self.pg_enable_capture(self.pg_interfaces)
            self.pg_start()

            self.checkCapture(encap='gre6', isv4=False)
        finally:
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 2001::/16 2002::%u del"
                    % (asid))
            self.vapi.cli(
                "lb vip 2001::/16 encap gre6 del")
            self.vapi.cli("test lb flowtable flush")

    def test_lb_ip4_gre4_port(self):
        """ Load Balancer IP4 GRE4 on per-port-vip case """
        try:
            self.vapi.cli(
                "lb vip 90.0.0.0/8 protocol udp port 20000 encap gre4")
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 protocol udp port 20000 10.0.0.%u"
                    % (asid))

            self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
            self.pg_enable_capture(self.pg_interfaces)
            self.pg_start()
            self.checkCapture(encap='gre4', isv4=True)

        finally:
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 protocol udp port 20000 10.0.0.%u del"
                    % (asid))
            self.vapi.cli(
                "lb vip 90.0.0.0/8 protocol udp port 20000 encap gre4 del")
            self.vapi.cli("test lb flowtable flush")

    def test_lb_ip6_gre4_port(self):
        """ Load Balancer IP6 GRE4 on per-port-vip case """

        try:
            self.vapi.cli(
                "lb vip 2001::/16 protocol udp port 20000 encap gre4")
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 2001::/16 protocol udp port 20000 10.0.0.%u"
                    % (asid))

            self.pg0.add_stream(self.generatePackets(self.pg0, isv4=False))
            self.pg_enable_capture(self.pg_interfaces)
            self.pg_start()

            self.checkCapture(encap='gre4', isv4=False)
        finally:
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 2001::/16 protocol udp port 20000 10.0.0.%u del"
                    % (asid))
            self.vapi.cli(
                "lb vip 2001::/16 protocol udp port 20000 encap gre4 del")
            self.vapi.cli("test lb flowtable flush")

    def test_lb_ip4_gre6_port(self):
        """ Load Balancer IP4 GRE6 on per-port-vip case """
        try:
            self.vapi.cli(
                "lb vip 90.0.0.0/8 protocol udp port 20000 encap gre6")
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 protocol udp port 20000 2002::%u"
                    % (asid))

            self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
            self.pg_enable_capture(self.pg_interfaces)
            self.pg_start()

            self.checkCapture(encap='gre6', isv4=True)
        finally:
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 protocol udp port 20000 2002::%u del"
                    % (asid))
            self.vapi.cli(
                "lb vip 90.0.0.0/8 protocol udp port 20000 encap gre6 del")
            self.vapi.cli("test lb flowtable flush")

    def test_lb_ip6_gre6_port(self):
        """ Load Balancer IP6 GRE6 on per-port-vip case """
        try:
            self.vapi.cli(
                "lb vip 2001::/16 protocol udp port 20000 encap gre6")
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 2001::/16 protocol udp port 20000 2002::%u"
                    % (asid))

            self.pg0.add_stream(self.generatePackets(self.pg0, isv4=False))
            self.pg_enable_capture(self.pg_interfaces)
            self.pg_start()

            self.checkCapture(encap='gre6', isv4=False)
        finally:
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 2001::/16 protocol udp port 20000 2002::%u del"
                    % (asid))
            self.vapi.cli(
                "lb vip 2001::/16 protocol udp port 20000 encap gre6 del")
            self.vapi.cli("test lb flowtable flush")

    def test_lb_ip4_l3dsr(self):
        """ Load Balancer IP4 L3DSR on vip case """
        try:
            self.vapi.cli(
                "lb vip 90.0.0.0/8 encap l3dsr dscp 7")
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 10.0.0.%u"
                    % (asid))

            self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
            self.pg_enable_capture(self.pg_interfaces)
            self.pg_start()
            self.checkCapture(encap='l3dsr', isv4=True)

        finally:
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 10.0.0.%u del"
                    % (asid))
            self.vapi.cli(
                "lb vip 90.0.0.0/8 encap l3dsr"
                " dscp 7 del")
            self.vapi.cli("test lb flowtable flush")

    def test_lb_ip4_l3dsr_port(self):
        """ Load Balancer IP4 L3DSR on per-port-vip case """
        try:
            self.vapi.cli(
                "lb vip 90.0.0.0/8 protocol udp port 20000 encap l3dsr dscp 7")
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 protocol udp port 20000 10.0.0.%u"
                    % (asid))

            self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
            self.pg_enable_capture(self.pg_interfaces)
            self.pg_start()
            self.checkCapture(encap='l3dsr', isv4=True)

        finally:
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 protocol udp port 20000 10.0.0.%u del"
                    % (asid))
            self.vapi.cli(
                "lb vip 90.0.0.0/8 protocol udp port 20000 encap l3dsr"
                " dscp 7 del")
            self.vapi.cli("test lb flowtable flush")

    def test_lb_ip4_nat4_port(self):
        """ Load Balancer IP4 NAT4 on per-port-vip case """
        try:
            self.vapi.cli(
                "lb vip 90.0.0.0/8 protocol udp port 20000 encap nat4"
                " type clusterip target_port 3307")
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 protocol udp port 20000 10.0.0.%u"
                    % (asid))

            self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
            self.pg_enable_capture(self.pg_interfaces)
            self.pg_start()
            self.checkCapture(encap='nat4', isv4=True)

        finally:
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 90.0.0.0/8 protocol udp port 20000 10.0.0.%u del"
                    % (asid))
            self.vapi.cli(
                "lb vip 90.0.0.0/8 protocol udp port 20000 encap nat4"
                " type clusterip target_port 3307 del")
            self.vapi.cli("test lb flowtable flush")

    def test_lb_ip6_nat6_port(self):
        """ Load Balancer IP6 NAT6 on per-port-vip case """
        try:
            self.vapi.cli(
                "lb vip 2001::/16 protocol udp port 20000 encap nat6"
                " type clusterip target_port 3307")
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 2001::/16 protocol udp port 20000 2002::%u"
                    % (asid))

            self.pg0.add_stream(self.generatePackets(self.pg0, isv4=False))
            self.pg_enable_capture(self.pg_interfaces)
            self.pg_start()
            self.checkCapture(encap='nat6', isv4=False)

        finally:
            for asid in self.ass:
                self.vapi.cli(
                    "lb as 2001::/16 protocol udp port 20000 2002::%u del"
                    % (asid))
            self.vapi.cli(
                "lb vip 2001::/16 protocol udp port 20000 encap nat6"
                " type clusterip target_port 3307 del")
            self.vapi.cli("test lb flowtable flush")