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| -rw-r--r-- | test/test_l2bd_learnlimit.py | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/test/test_l2bd_learnlimit.py b/test/test_l2bd_learnlimit.py new file mode 100644 index 00000000000..6a28664e522 --- /dev/null +++ b/test/test_l2bd_learnlimit.py @@ -0,0 +1,119 @@ +#!/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) |