test/test_l2bd_learnlimit_bdenabled.py

   1 #!/usr/bin/env python3
   2
   3 import unittest
   4 import random
   5
   6 from scapy.packet import Raw
   7 from scapy.layers.l2 import Ether
   8 from scapy.layers.inet import IP, UDP
   9
  10 from framework import VppTestCase, VppTestRunner, running_extended_tests
  11 from util import Host, ppp
  12
  13
  14 class TestL2LearnLimit(VppTestCase):
  15     """ L2 Bridge Domain Learn limit Test Case """
  16
  17     @classmethod
  18     def setUpClass(self):
  19         super(TestL2LearnLimit, self).setUpClass()
  20         self.create_pg_interfaces(range(3))
  21
  22     @classmethod
  23     def tearDownClass(cls):
  24         super(TestL2LearnLimit, cls).tearDownClass()
  25
  26     def create_hosts(self, pg_if, n_hosts_per_if, subnet):
  27         """
  28         Create required number of host MAC addresses and distribute them among
  29         interfaces. Create host IPv4 address for every host MAC address.
  30
  31         :param int n_hosts_per_if: Number of per interface hosts to
  32             create MAC/IPv4 addresses for.
  33         """
  34
  35         hosts = dict()
  36         swif = pg_if.sw_if_index
  37
  38         def mac(j): return "00:00:%02x:ff:%02x:%02x" % (subnet, swif, j)
  39
  40         def ip(j): return "172.%02u.1%02x.%u" % (subnet, swif, j)
  41
  42         def h(j): return Host(mac(j), ip(j))
  43         hosts[swif] = [h(j) for j in range(n_hosts_per_if)]
  44
  45         return hosts
  46
  47     def learn_hosts(self, pg_if, bd_id, hosts):
  48         """
  49         Create and send per interface L2 MAC broadcast packet stream to
  50         let the bridge domain learn these MAC addresses.
  51
  52         :param int bd_id: BD to teach
  53         :param dict hosts: dict of hosts per interface
  54         """
  55
  56         self.vapi.bridge_flags(bd_id=bd_id, is_set=1, flags=1)
  57
  58         swif = pg_if.sw_if_index
  59         packets = [Ether(dst="ff:ff:ff:ff:ff:ff", src=host.mac)
  60                    for host in hosts[swif]]
  61         pg_if.add_stream(packets)
  62         self.logger.info("Sending broadcast eth frames for MAC learning")
  63         self.pg_start()
  64
  65     def test_l2bd_learnlimit(self):
  66         """ L2BD test with bridge domain limit
  67         """
  68         self.vapi.want_l2_macs_events(enable_disable=1, learn_limit=1000)
  69         self.vapi.bridge_domain_set_default_learn_limit(4)
  70         self.vapi.bridge_domain_add_del(bd_id=3)
  71         self.vapi.sw_interface_set_l2_bridge(
  72             self.pg_interfaces[2].sw_if_index, bd_id=3)
  73
  74         self.vapi.bridge_domain_set_learn_limit(2, 5)
  75
  76         hosts = self.create_hosts(self.pg_interfaces[1], 20, 2)
  77         fhosts = self.create_hosts(self.pg_interfaces[2], 20, 3)
  78
  79         # inject 20 mac addresses on bd2
  80         self.learn_hosts(self.pg_interfaces[1], 2, hosts)
  81
  82         # inject 20 macs address on bd3
  83         self.learn_hosts(self.pg_interfaces[2], 3, fhosts)
  84
  85         lfs1 = self.vapi.l2_fib_table_dump(2)
  86         lfs2 = self.vapi.l2_fib_table_dump(3)
  87
  88         # check that only 5 macs are learned.
  89         self.assertEqual(len(lfs1), 5)
  90
  91         # check that only 4 macs are learned.
  92         self.assertEqual(len(lfs2), 4)
  93
  94         self.vapi.sw_interface_set_l2_bridge(
  95             rx_sw_if_index=self.pg_interfaces[2].sw_if_index,
  96             bd_id=3, enable=0)
  97         self.vapi.bridge_domain_add_del(is_add=0, bd_id=3)
  98
  99     def setUp(self):
 100         super(TestL2LearnLimit, self).setUp()
 101
 102         self.vapi.bridge_domain_add_del(bd_id=1)
 103         self.vapi.bridge_domain_add_del(bd_id=2)
 104
 105         self.vapi.sw_interface_set_l2_bridge(
 106             self.pg_interfaces[0].sw_if_index, bd_id=1)
 107         self.vapi.sw_interface_set_l2_bridge(
 108             self.pg_interfaces[1].sw_if_index, bd_id=2)
 109
 110     def tearDown(self):
 111         super(TestL2LearnLimit, self).tearDown()
 112         self.vapi.sw_interface_set_l2_bridge(
 113             rx_sw_if_index=self.pg_interfaces[0].sw_if_index,
 114             bd_id=1, enable=0)
 115         self.vapi.sw_interface_set_l2_bridge(
 116             rx_sw_if_index=self.pg_interfaces[1].sw_if_index,
 117             bd_id=2, enable=0)
 118         self.vapi.bridge_domain_add_del(bd_id=1, is_add=0)
 119         self.vapi.bridge_domain_add_del(bd_id=2, is_add=0)
 120
 121
 122 if __name__ == '__main__':
 123     unittest.main(testRunner=VppTestRunner)