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-rw-r--r--test/test_l2bd_learnlimit.py119
1 files changed, 119 insertions, 0 deletions
diff --git a/test/test_l2bd_learnlimit.py b/test/test_l2bd_learnlimit.py
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+++ b/test/test_l2bd_learnlimit.py
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+#!/usr/bin/env python3
+
+import unittest
+import random
+
+from scapy.packet import Raw
+from scapy.layers.l2 import Ether
+from scapy.layers.inet import IP, UDP
+
+from framework import VppTestCase, VppTestRunner, running_extended_tests
+from util import Host, ppp
+
+
+class TestL2LearnLimit(VppTestCase):
+ """ L2 Learn limit Test Case """
+
+ @classmethod
+ def setUpClass(self):
+ super(TestL2LearnLimit, self).setUpClass()
+ self.create_pg_interfaces(range(2))
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestL2LearnLimit, cls).tearDownClass()
+
+ def create_hosts(self, pg_if, n_hosts_per_if, subnet):
+ """
+ Create required number of host MAC addresses and distribute them among
+ interfaces. Create host IPv4 address for every host MAC address.
+
+ :param int n_hosts_per_if: Number of per interface hosts to
+ create MAC/IPv4 addresses for.
+ """
+
+ hosts = dict()
+ swif = pg_if.sw_if_index
+
+ def mac(j): return "00:00:%02x:ff:%02x:%02x" % (subnet, swif, j)
+
+ def ip(j): return "172.%02u.1%02x.%u" % (subnet, swif, j)
+
+ def h(j): return Host(mac(j), ip(j))
+ hosts[swif] = [h(j) for j in range(n_hosts_per_if)]
+
+ return hosts
+
+ def learn_hosts(self, pg_if, bd_id, hosts):
+ """
+ Create and send per interface L2 MAC broadcast packet stream to
+ let the bridge domain learn these MAC addresses.
+
+ :param int bd_id: BD to teach
+ :param dict hosts: dict of hosts per interface
+ """
+
+ self.vapi.bridge_flags(bd_id=bd_id, is_set=1, flags=1)
+
+ swif = pg_if.sw_if_index
+ packets = [Ether(dst="ff:ff:ff:ff:ff:ff", src=host.mac)
+ for host in hosts[swif]]
+ pg_if.add_stream(packets)
+ self.logger.info("Sending broadcast eth frames for MAC learning")
+ self.pg_start()
+
+ def test_l2bd_learnlimit01(self):
+ """ L2BD test without learn Limit
+ """
+ hosts = self.create_hosts(self.pg_interfaces[0], 20, 1)
+ self.learn_hosts(self.pg_interfaces[0], 1, hosts)
+ lfs = self.vapi.l2_fib_table_dump(1)
+
+ # check that 20 macs are learned.
+ self.assertEqual(len(lfs), 20)
+
+ def test_l2bd_learnlimit02(self):
+ """ L2BD test with learn Limit
+ """
+ self.vapi.want_l2_macs_events(enable_disable=1, learn_limit=10)
+ hosts = self.create_hosts(self.pg_interfaces[0], 20, 1)
+ fhosts = self.create_hosts(self.pg_interfaces[1], 1, 2)
+
+ # inject 20 mac addresses on bd1
+ self.learn_hosts(self.pg_interfaces[0], 1, hosts)
+
+ # inject 1 mac address on bd2
+ self.learn_hosts(self.pg_interfaces[1], 2, fhosts)
+
+ lfs1 = self.vapi.l2_fib_table_dump(1)
+ lfs2 = self.vapi.l2_fib_table_dump(2)
+
+ # check that only 10 macs are learned.
+ self.assertEqual(len(lfs1), 10)
+
+ # check that bd2 was not able to learn
+ self.assertEqual(len(lfs2), 0)
+
+ def setUp(self):
+ super(TestL2LearnLimit, self).setUp()
+
+ self.vapi.bridge_domain_add_del(bd_id=1)
+ self.vapi.bridge_domain_add_del(bd_id=2)
+
+ self.vapi.sw_interface_set_l2_bridge(
+ self.pg_interfaces[0].sw_if_index, bd_id=1)
+ self.vapi.sw_interface_set_l2_bridge(
+ self.pg_interfaces[1].sw_if_index, bd_id=2)
+
+ def tearDown(self):
+ for i in self.pg_interfaces[:2]:
+ self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=i.sw_if_index,
+ bd_id=1, enable=0)
+ self.vapi.bridge_domain_add_del(bd_id=1, is_add=0)
+ self.vapi.bridge_domain_add_del(bd_id=2, is_add=0)
+
+ super(TestL2LearnLimit, self).tearDown()
+
+
+if __name__ == '__main__':
+ unittest.main(testRunner=VppTestRunner)