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vpp/test/test_vxlan.py
Neale Ranns 097fa66b98 fib: fib api updates 
Enhance the route add/del APIs to take a set of paths rather than just one.
Most unicast routing protocols calcualte all the available paths in one
run of the algorithm so updating all the paths at once is beneficial for the client.
two knobs control the behaviour:
  is_multipath - if set the the set of paths passed will be added to those
                 that already exist, otherwise the set will replace them.
  is_add - add or remove the set

is_add=0, is_multipath=1 and an empty set, results in deleting the route.

It is also considerably faster to add multiple paths at once, than one at a time:

vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.11
100000 routes in .572240 secs, 174751.80 routes/sec
vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.12
100000 routes in .528383 secs, 189256.54 routes/sec
vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.13
100000 routes in .757131 secs, 132077.52 routes/sec
vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.14
100000 routes in .878317 secs, 113854.12 routes/sec

vat# ip_route_add_del 1.1.1.1/32 count 100000 multipath via 10.10.10.11 via 10.10.10.12 via 10.10.10.13 via 10.10.10.14
100000 routes in .900212 secs, 111084.93 routes/sec

Change-Id: I416b93f7684745099c1adb0b33edac58c9339c1a
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
Signed-off-by: Ole Troan <ot@cisco.com>
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
2019-06-18 13:31:39 +00:00

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#!/usr/bin/env python
import socket
from util import ip4n_range, ip4_range, reassemble4
import unittest
from framework import VppTestCase, VppTestRunner
from template_bd import BridgeDomain
from scapy.layers.l2 import Ether, Raw
from scapy.layers.inet import IP, UDP
from scapy.layers.vxlan import VXLAN
from scapy.utils import atol
from vpp_ip_route import VppIpRoute, VppRoutePath
from vpp_ip import INVALID_INDEX
class TestVxlan(BridgeDomain, VppTestCase):
""" VXLAN Test Case """
def __init__(self, *args):
BridgeDomain.__init__(self)
VppTestCase.__init__(self, *args)
def encapsulate(self, pkt, vni):
"""
Encapsulate the original payload frame by adding VXLAN header with its
UDP, IP and Ethernet fields
"""
return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
UDP(sport=self.dport, dport=self.dport, chksum=0) /
VXLAN(vni=vni, flags=self.flags) /
pkt)
def ip_range(self, start, end):
""" range of remote ip's """
return ip4_range(self.pg0.remote_ip4, start, end)
def encap_mcast(self, pkt, src_ip, src_mac, vni):
"""
Encapsulate the original payload frame by adding VXLAN header with its
UDP, IP and Ethernet fields
"""
return (Ether(src=src_mac, dst=self.mcast_mac) /
IP(src=src_ip, dst=self.mcast_ip4) /
UDP(sport=self.dport, dport=self.dport, chksum=0) /
VXLAN(vni=vni, flags=self.flags) /
pkt)
def decapsulate(self, pkt):
"""
Decapsulate the original payload frame by removing VXLAN header
"""
# check if is set I flag
self.assertEqual(pkt[VXLAN].flags, int('0x8', 16))
return pkt[VXLAN].payload
# Method for checking VXLAN encapsulation.
#
def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False):
# TODO: add error messages
# Verify source MAC is VPP_MAC and destination MAC is MY_MAC resolved
# by VPP using ARP.
self.assertEqual(pkt[Ether].src, self.pg0.local_mac)
if not local_only:
if not mcast_pkt:
self.assertEqual(pkt[Ether].dst, self.pg0.remote_mac)
else:
self.assertEqual(pkt[Ether].dst, type(self).mcast_mac)
# Verify VXLAN tunnel source IP is VPP_IP and destination IP is MY_IP.
self.assertEqual(pkt[IP].src, self.pg0.local_ip4)
if not local_only:
if not mcast_pkt:
self.assertEqual(pkt[IP].dst, self.pg0.remote_ip4)
else:
self.assertEqual(pkt[IP].dst, type(self).mcast_ip4)
# Verify UDP destination port is VXLAN 4789, source UDP port could be
# arbitrary.
self.assertEqual(pkt[UDP].dport, type(self).dport)
# TODO: checksum check
# Verify VNI
self.assertEqual(pkt[VXLAN].vni, vni)
@classmethod
def create_vxlan_flood_test_bd(cls, vni, n_ucast_tunnels):
# Create 10 ucast vxlan tunnels under bd
ip_range_start = 10
ip_range_end = ip_range_start + n_ucast_tunnels
next_hop_address = cls.pg0.remote_ip4
for dest_ip4 in ip4_range(next_hop_address, ip_range_start,
ip_range_end):
# add host route so dest_ip4n will not be resolved
rip = VppIpRoute(cls, dest_ip4, 32,
[VppRoutePath(next_hop_address,
INVALID_INDEX)],
register=False)
rip.add_vpp_config()
dest_ip4n = socket.inet_pton(socket.AF_INET, dest_ip4)
r = cls.vapi.vxlan_add_del_tunnel(src_address=cls.pg0.local_ip4n,
dst_address=dest_ip4n, vni=vni)
cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni)
@classmethod
def add_del_shared_mcast_dst_load(cls, is_add):
"""
add or del tunnels sharing the same mcast dst
to test vxlan ref_count mechanism
"""
n_shared_dst_tunnels = 20
vni_start = 10000
vni_end = vni_start + n_shared_dst_tunnels
for vni in range(vni_start, vni_end):
r = cls.vapi.vxlan_add_del_tunnel(src_address=cls.pg0.local_ip4n,
dst_address=cls.mcast_ip4n,
mcast_sw_if_index=1,
is_add=is_add, vni=vni)
if r.sw_if_index == 0xffffffff:
raise ValueError("bad sw_if_index: ~0")
@classmethod
def add_shared_mcast_dst_load(cls):
cls.add_del_shared_mcast_dst_load(is_add=1)
@classmethod
def del_shared_mcast_dst_load(cls):
cls.add_del_shared_mcast_dst_load(is_add=0)
@classmethod
def add_del_mcast_tunnels_load(cls, is_add):
"""
add or del tunnels to test vxlan stability
"""
n_distinct_dst_tunnels = 200
ip_range_start = 10
ip_range_end = ip_range_start + n_distinct_dst_tunnels
for dest_ip4n in ip4n_range(cls.mcast_ip4n, ip_range_start,
ip_range_end):
vni = bytearray(dest_ip4n)[3]
cls.vapi.vxlan_add_del_tunnel(src_address=cls.pg0.local_ip4n,
dst_address=dest_ip4n,
mcast_sw_if_index=1, is_add=is_add,
vni=vni)
@classmethod
def add_mcast_tunnels_load(cls):
cls.add_del_mcast_tunnels_load(is_add=1)
@classmethod
def del_mcast_tunnels_load(cls):
cls.add_del_mcast_tunnels_load(is_add=0)
# Class method to start the VXLAN test case.
# Overrides setUpClass method in VppTestCase class.
# Python try..except statement is used to ensure that the tear down of
# the class will be executed even if exception is raised.
# @param cls The class pointer.
@classmethod
def setUpClass(cls):
super(TestVxlan, cls).setUpClass()
try:
cls.dport = 4789
cls.flags = 0x8
# Create 2 pg interfaces.
cls.create_pg_interfaces(range(4))
for pg in cls.pg_interfaces:
pg.admin_up()
# Configure IPv4 addresses on VPP pg0.
cls.pg0.config_ip4()
# Resolve MAC address for VPP's IP address on pg0.
cls.pg0.resolve_arp()
# Our Multicast address
cls.mcast_ip4 = '239.1.1.1'
cls.mcast_ip4n = socket.inet_pton(socket.AF_INET, cls.mcast_ip4)
iplong = atol(cls.mcast_ip4)
cls.mcast_mac = "01:00:5e:%02x:%02x:%02x" % (
(iplong >> 16) & 0x7F, (iplong >> 8) & 0xFF, iplong & 0xFF)
# Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
# into BD.
cls.single_tunnel_bd = 1
r = cls.vapi.vxlan_add_del_tunnel(src_address=cls.pg0.local_ip4n,
dst_address=cls.pg0.remote_ip4n,
vni=cls.single_tunnel_bd)
cls.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
bd_id=cls.single_tunnel_bd)
cls.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=cls.pg1.sw_if_index, bd_id=cls.single_tunnel_bd)
# Setup vni 2 to test multicast flooding
cls.n_ucast_tunnels = 10
cls.mcast_flood_bd = 2
cls.create_vxlan_flood_test_bd(cls.mcast_flood_bd,
cls.n_ucast_tunnels)
r = cls.vapi.vxlan_add_del_tunnel(src_address=cls.pg0.local_ip4n,
dst_address=cls.mcast_ip4n,
mcast_sw_if_index=1,
vni=cls.mcast_flood_bd)
cls.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=r.sw_if_index,
bd_id=cls.mcast_flood_bd)
cls.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=cls.pg2.sw_if_index, bd_id=cls.mcast_flood_bd)
# Add and delete mcast tunnels to check stability
cls.add_shared_mcast_dst_load()
cls.add_mcast_tunnels_load()
cls.del_shared_mcast_dst_load()
cls.del_mcast_tunnels_load()
# Setup vni 3 to test unicast flooding
cls.ucast_flood_bd = 3
cls.create_vxlan_flood_test_bd(cls.ucast_flood_bd,
cls.n_ucast_tunnels)
cls.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=cls.pg3.sw_if_index, bd_id=cls.ucast_flood_bd)
except Exception:
super(TestVxlan, cls).tearDownClass()
raise
@classmethod
def tearDownClass(cls):
super(TestVxlan, cls).tearDownClass()
def test_encap_big_packet(self):
""" Encapsulation test send big frame from pg1
Verify receipt of encapsulated frames on pg0
"""
self.vapi.sw_interface_set_mtu(self.pg0.sw_if_index, [1500, 0, 0, 0])
frame = (Ether(src='00:00:00:00:00:02', dst='00:00:00:00:00:01') /
IP(src='4.3.2.1', dst='1.2.3.4') /
UDP(sport=20000, dport=10000) /
Raw('\xa5' * 1450))
self.pg1.add_stream([frame])
self.pg0.enable_capture()
self.pg_start()
# Pick first received frame and check if it's correctly encapsulated.
out = self.pg0.get_capture(2)
ether = out[0]
pkt = reassemble4(out)
pkt = ether / pkt
self.check_encapsulation(pkt, self.single_tunnel_bd)
payload = self.decapsulate(pkt)
# TODO: Scapy bug?
# self.assert_eq_pkts(payload, frame)
# Method to define VPP actions before tear down of the test case.
# Overrides tearDown method in VppTestCase class.
# @param self The object pointer.
def tearDown(self):
super(TestVxlan, self).tearDown()
def show_commands_at_teardown(self):
self.logger.info(self.vapi.cli("show bridge-domain 1 detail"))
self.logger.info(self.vapi.cli("show bridge-domain 2 detail"))
self.logger.info(self.vapi.cli("show bridge-domain 3 detail"))
self.logger.info(self.vapi.cli("show vxlan tunnel"))
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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