test/test_l2bd_learnlimit_enabled.py

   1 #!/usr/bin/env python3
   2
   3 import unittest
   4
   5 from scapy.layers.l2 import Ether
   6
   7 from framework import VppTestCase
   8 from asfframework import VppTestRunner
   9 from util import Host
  10
  11
  12 class TestL2LearnLimitEnable(VppTestCase):
  13     """L2 Global Learn limit Test Case"""
  14
  15     @classmethod
  16     def setUpClass(self):
  17         super(TestL2LearnLimitEnable, self).setUpClass()
  18         self.create_pg_interfaces(range(3))
  19
  20     @classmethod
  21     def tearDownClass(cls):
  22         super(TestL2LearnLimitEnable, cls).tearDownClass()
  23
  24     def create_hosts(self, pg_if, n_hosts_per_if, subnet):
  25         """
  26         Create required number of host MAC addresses and distribute them among
  27         interfaces. Create host IPv4 address for every host MAC address.
  28
  29         :param int n_hosts_per_if: Number of per interface hosts to
  30              create MAC/IPv4 addresses for.
  31         """
  32
  33         hosts = dict()
  34         swif = pg_if.sw_if_index
  35
  36         def mac(j):
  37             return "00:00:%02x:ff:%02x:%02x" % (subnet, swif, j)
  38
  39         def ip(j):
  40             return "172.%02u.1%02x.%u" % (subnet, swif, j)
  41
  42         def h(j):
  43             return Host(mac(j), ip(j))
  44
  45         hosts[swif] = [h(j) for j in range(n_hosts_per_if)]
  46
  47         return hosts
  48
  49     def learn_hosts(self, pg_if, bd_id, hosts):
  50         """
  51         Create and send per interface L2 MAC broadcast packet stream to
  52         let the bridge domain learn these MAC addresses.
  53
  54         :param int bd_id: BD to teach
  55         :param dict hosts: dict of hosts per interface
  56         """
  57
  58         self.vapi.bridge_flags(bd_id=bd_id, is_set=1, flags=1)
  59
  60         swif = pg_if.sw_if_index
  61         packets = [Ether(dst="ff:ff:ff:ff:ff:ff", src=host.mac) for host in hosts[swif]]
  62         pg_if.add_stream(packets)
  63         self.logger.info("Sending broadcast eth frames for MAC learning")
  64         self.pg_start()
  65
  66     def test_l2bd_learnlimit01(self):
  67         """L2BD test with learn Limit"""
  68         self.vapi.want_l2_macs_events(enable_disable=1, learn_limit=10)
  69         hosts = self.create_hosts(self.pg_interfaces[0], 20, 1)
  70         fhosts = self.create_hosts(self.pg_interfaces[1], 1, 2)
  71
  72         # inject 20 mac addresses on bd1
  73         self.learn_hosts(self.pg_interfaces[0], 1, hosts)
  74
  75         # inject 1 mac address on bd2
  76         self.learn_hosts(self.pg_interfaces[1], 2, fhosts)
  77
  78         lfs1 = self.vapi.l2_fib_table_dump(1)
  79         lfs2 = self.vapi.l2_fib_table_dump(2)
  80
  81         # check that only 10 macs are learned.
  82         self.assertEqual(len(lfs1), 10)
  83
  84         # check that bd2 was not able to learn
  85         self.assertEqual(len(lfs2), 0)
  86
  87     def setUp(self):
  88         super(TestL2LearnLimitEnable, self).setUp()
  89
  90         self.vapi.bridge_domain_add_del_v2(
  91             bd_id=1, is_add=1, flood=1, forward=1, uu_flood=1, learn=1
  92         )
  93         self.vapi.bridge_domain_add_del_v2(
  94             bd_id=2, is_add=1, flood=1, forward=1, uu_flood=1, learn=1
  95         )
  96
  97         self.vapi.sw_interface_set_l2_bridge(self.pg_interfaces[0].sw_if_index, bd_id=1)
  98         self.vapi.sw_interface_set_l2_bridge(self.pg_interfaces[1].sw_if_index, bd_id=2)
  99
 100     def tearDown(self):
 101         super(TestL2LearnLimitEnable, self).tearDown()
 102         self.vapi.sw_interface_set_l2_bridge(
 103             rx_sw_if_index=self.pg_interfaces[0].sw_if_index, bd_id=1, enable=0
 104         )
 105         self.vapi.sw_interface_set_l2_bridge(
 106             rx_sw_if_index=self.pg_interfaces[1].sw_if_index, bd_id=2, enable=0
 107         )
 108         self.vapi.bridge_domain_add_del_v2(bd_id=1, is_add=0)
 109         self.vapi.bridge_domain_add_del_v2(bd_id=2, is_add=0)
 110
 111
 112 if __name__ == "__main__":
 113     unittest.main(testRunner=VppTestRunner)