372 lines
11 KiB
Python
372 lines
11 KiB
Python
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#!/usr/bin/python
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# SPDX-License-Identifier: ISC
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#
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# Copyright (c) 2020 by VMware, Inc. ("VMware")
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# Used Copyright (c) 2018 by Network Device Education Foundation,
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# Inc. ("NetDEF") in this file.
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#
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"""
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Following tests are covered to test bgp community functionality:
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1. Verify that BGP well known communities work fine for
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eBGP and iBGP peers.
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Well known communities tested: no-export, local-AS
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"""
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import os
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import sys
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import time
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import pytest
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# Save the Current Working Directory to find configuration files.
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CWD = os.path.dirname(os.path.realpath(__file__))
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sys.path.append(os.path.join(CWD, "../"))
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# pylint: disable=C0413
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# Import topogen and topotest helpers
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from lib.topogen import Topogen, get_topogen
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# Import topoJson from lib, to create topology and initial configuration
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from lib.common_config import (
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start_topology,
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write_test_header,
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write_test_footer,
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reset_config_on_routers,
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verify_rib,
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create_static_routes,
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check_address_types,
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step,
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create_route_maps,
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create_route_maps,
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required_linux_kernel_version,
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)
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from lib.topolog import logger
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from lib.bgp import (
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verify_bgp_convergence,
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create_router_bgp,
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verify_bgp_rib,
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verify_bgp_community,
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)
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from lib.topojson import build_config_from_json
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pytestmark = [pytest.mark.bgpd, pytest.mark.staticd]
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# Global variables
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BGP_CONVERGENCE = False
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ADDR_TYPES = check_address_types()
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NETWORK = {
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"ipv4": ["192.0.2.1/32", "192.0.2.2/32"],
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"ipv6": ["2001:DB8::1:1/128", "2001:DB8::1:2/128"],
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}
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def setup_module(mod):
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"""
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Sets up the pytest environment
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* `mod`: module name
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"""
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# Required linux kernel version for this suite to run.
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result = required_linux_kernel_version("4.14")
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if result is not True:
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pytest.skip("Kernel requirements are not met, kernel version should be >= 4.14")
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testsuite_run_time = time.asctime(time.localtime(time.time()))
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logger.info("Testsuite start time: {}".format(testsuite_run_time))
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logger.info("=" * 40)
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logger.info("Running setup_module to create topology")
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# This function initiates the topology build with Topogen...
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json_file = "{}/bgp_communities_topo2.json".format(CWD)
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tgen = Topogen(json_file, mod.__name__)
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global topo
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topo = tgen.json_topo
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# ... and here it calls Mininet initialization functions.
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# Starting topology, create tmp files which are loaded to routers
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# to start daemons and then start routers
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start_topology(tgen)
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# Creating configuration from JSON
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build_config_from_json(tgen, topo)
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# Checking BGP convergence
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global BGP_CONVERGENCE
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global ADDR_TYPES
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# Don't run this test if we have any failure.
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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# Api call verify whether BGP is converged
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BGP_CONVERGENCE = verify_bgp_convergence(tgen, topo)
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assert BGP_CONVERGENCE is True, "setup_module :Failed \n Error:" " {}".format(
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BGP_CONVERGENCE
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)
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logger.info("Running setup_module() done")
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def teardown_module(mod):
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"""
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Teardown the pytest environment
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* `mod`: module name
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"""
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logger.info("Running teardown_module to delete topology")
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tgen = get_topogen()
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# Stop toplogy and Remove tmp files
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tgen.stop_topology()
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logger.info(
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"Testsuite end time: {}".format(time.asctime(time.localtime(time.time())))
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)
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logger.info("=" * 40)
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#####################################################
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#
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# Tests starting
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#
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#####################################################
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def test_bgp_no_export_local_as_communities_p0(request):
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"""
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Verify that BGP well known communities work fine for
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eBGP and iBGP peers.
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Well known communities tested: no-export, local-AS
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"""
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tc_name = request.node.name
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write_test_header(tc_name)
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tgen = get_topogen()
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# Don"t run this test if we have any failure.
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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step("Initial config: Configure BGP neighborship between R1 and R3.")
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reset_config_on_routers(tgen)
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step("Configure static routes on R1 with next-hop as null0")
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for addr_type in ADDR_TYPES:
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input_dict_4 = {
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"r1": {
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"static_routes": [{"network": NETWORK[addr_type], "next_hop": "null0"}]
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}
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}
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result = create_static_routes(tgen, input_dict_4)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(
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tc_name, result
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)
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for comm_type in ["no-export", "local-AS"]:
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step("Create a route-map on R1 to set community as {}".format(comm_type))
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seq_id = 10
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input_rmap = {
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"r1": {
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"route_maps": {
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"rmap_wkc": [
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{
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"action": "permit",
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"seq_id": seq_id,
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"set": {"community": {"num": "{}".format(comm_type)}},
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}
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]
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}
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}
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}
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result = create_route_maps(tgen, input_rmap)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(
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tc_name, result
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)
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step("Apply route-map while redistributing static routes into BGP")
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input_dict_2 = {
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"r1": {
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"bgp": {
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"address_family": {
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"ipv4": {
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"unicast": {
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"redistribute": [
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{
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"redist_type": "static",
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"attribute": {"route-map": "rmap_wkc"},
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}
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]
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}
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},
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"ipv6": {
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"unicast": {
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"redistribute": [
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{
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"redist_type": "static",
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"attribute": {"route-map": "rmap_wkc"},
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}
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]
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}
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},
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}
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}
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}
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}
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result = create_router_bgp(tgen, topo, input_dict_2)
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step("Verify that BGP prefixes on R1 have community: {}".format(comm_type))
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input_dict_4 = {"community": "{}".format(comm_type)}
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for addr_type in ADDR_TYPES:
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result = verify_bgp_community(
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tgen, addr_type, "r1", NETWORK[addr_type], input_dict_4
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)
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assert result is True, "Test case {} : Should fail \n Error: {}".format(
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tc_name, result
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)
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for addr_type in ADDR_TYPES:
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input_dict_4 = {
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"r1": {
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"static_routes": [
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{
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"network": NETWORK[addr_type],
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"next_hop": topo["routers"]["r2"]["links"]["r1"][
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addr_type
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].split("/")[0],
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}
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]
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}
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}
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result = verify_bgp_rib(
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tgen,
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addr_type,
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"r2",
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input_dict_4,
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next_hop=topo["routers"]["r1"]["links"]["r2"][addr_type].split("/")[0],
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)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(
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tc_name, result
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)
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step(
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"Verify that these prefixes, originated on R1, are not"
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"received on R3 but received on R2"
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)
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result = verify_rib(
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tgen,
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addr_type,
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"r3",
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input_dict_4,
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next_hop=topo["routers"]["r1"]["links"]["r3"][addr_type].split("/")[0],
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expected=False,
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)
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assert result is not True, (
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"Testcase {} : Failed \n "
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"Expected: Routes are still present in rib of r3 \n "
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"Found: {}".format(tc_name, result)
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)
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step("Remove route-map from redistribute static on R1")
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input_dict_2 = {
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"r1": {
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"bgp": {
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"address_family": {
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"ipv4": {
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"unicast": {
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"redistribute": [
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{"redist_type": "static", "delete": True}
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]
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}
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},
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"ipv6": {
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"unicast": {
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"redistribute": [
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{"redist_type": "static", "delete": True}
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]
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}
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},
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}
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}
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}
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}
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result = create_router_bgp(tgen, topo, input_dict_2)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(
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tc_name, result
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)
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step("Configure redistribute static")
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input_dict_2 = {
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"r1": {
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"bgp": {
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"address_family": {
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"ipv4": {
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"unicast": {"redistribute": [{"redist_type": "static"}]}
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},
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"ipv6": {
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"unicast": {"redistribute": [{"redist_type": "static"}]}
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},
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}
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}
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}
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}
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result = create_router_bgp(tgen, topo, input_dict_2)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(
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tc_name, result
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)
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step(
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"Verify that these prefixes, originated on R1, are now"
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"received on both routers R2 and R3"
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)
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for addr_type in ADDR_TYPES:
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input_dict_4 = {
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"r1": {
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"static_routes": [
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{
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"network": NETWORK[addr_type],
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"next_hop": topo["routers"]["r2"]["links"]["r1"][
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addr_type
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].split("/")[0],
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}
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]
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}
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}
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result = verify_bgp_rib(
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tgen,
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addr_type,
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"r2",
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input_dict_4,
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next_hop=topo["routers"]["r1"]["links"]["r2"][addr_type].split("/")[0],
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)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(
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tc_name, result
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)
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result = verify_bgp_rib(
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tgen,
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addr_type,
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"r3",
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input_dict_4,
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next_hop=topo["routers"]["r1"]["links"]["r3"][addr_type].split("/")[0],
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)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(
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tc_name, result
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)
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write_test_footer(tc_name)
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if __name__ == "__main__":
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args = ["-s"] + sys.argv[1:]
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sys.exit(pytest.main(args))
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