744 lines
23 KiB
Python
744 lines
23 KiB
Python
#!/usr/bin/env python
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# SPDX-License-Identifier: ISC
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#
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# Copyright (c) 2019 by VMware, Inc. ("VMware")
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# Used Copyright (c) 2018 by Network Device Education Foundation, Inc.
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# ("NetDEF") in this file.
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#
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"""
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Following tests are covered to test ecmp functionality on EBGP.
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1. Verify routes installed as per maximum-paths configuration (8/16/32)
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2. Disable/Shut selected paths nexthops and verify other next are installed in
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the RIB of DUT. Enable interfaces and verify RIB count.
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3. Verify BGP table and RIB in DUT after clear BGP routes and neighbors.
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4. Verify routes are cleared from BGP and RIB table of DUT when
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redistribute static configuration is removed.
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5. Shut BGP neighbors one by one and verify BGP and routing table updated
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accordingly in DUT
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6. Delete static routes and verify routers are cleared from BGP table and RIB
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of DUT.
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7. Verify routes are cleared from BGP and RIB table of DUT when advertise
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network configuration is removed.
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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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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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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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verify_rib,
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create_static_routes,
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check_address_types,
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interface_status,
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reset_config_on_routers,
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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 verify_bgp_convergence, create_router_bgp, clear_bgp
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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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NEXT_HOPS = {"ipv4": [], "ipv6": []}
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INTF_LIST_R3 = []
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INTF_LIST_R2 = []
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NETWORK = {"ipv4": "11.0.20.1/32", "ipv6": "1::/64"}
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NEXT_HOP_IP = {"ipv4": "10.0.0.1", "ipv6": "fd00::1"}
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BGP_CONVERGENCE = False
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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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global NEXT_HOPS, INTF_LIST_R3, INTF_LIST_R2, TEST_STATIC
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global ADDR_TYPES
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# Required linux kernel version for this suite to run.
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result = required_linux_kernel_version("4.15")
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if result is not True:
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pytest.skip("Kernel requirements are not met, kernel version should be >=4.15")
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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 = "{}/ibgp_ecmp_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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# 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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# 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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# tgen.mininet_cli()
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# Api call verify whether BGP is converged
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ADDR_TYPES = check_address_types()
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for _ in ADDR_TYPES:
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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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link_data = [
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val for links, val in topo["routers"]["r2"]["links"].items() if "r3" in links
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]
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for adt in ADDR_TYPES:
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NEXT_HOPS[adt] = [val[adt].split("/")[0] for val in link_data]
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if adt == "ipv4":
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NEXT_HOPS[adt] = sorted(NEXT_HOPS[adt], key=lambda x: int(x.split(".")[2]))
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elif adt == "ipv6":
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NEXT_HOPS[adt] = sorted(
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NEXT_HOPS[adt], key=lambda x: int(x.split(":")[-3], 16)
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)
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INTF_LIST_R2 = [val["interface"].split("/")[0] for val in link_data]
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INTF_LIST_R2 = sorted(INTF_LIST_R2, key=lambda x: int(x.split("eth")[1]))
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link_data = [
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val for links, val in topo["routers"]["r3"]["links"].items() if "r2" in links
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]
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INTF_LIST_R3 = [val["interface"].split("/")[0] for val in link_data]
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INTF_LIST_R3 = sorted(INTF_LIST_R3, key=lambda x: int(x.split("eth")[1]))
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# STATIC_ROUTE = True
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logger.info("Running setup_module() done")
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def teardown_module():
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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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def static_or_nw(tgen, topo, tc_name, test_type, dut):
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if test_type == "redist_static":
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input_dict_static = {
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dut: {
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"static_routes": [
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{"network": NETWORK["ipv4"], "next_hop": NEXT_HOP_IP["ipv4"]},
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{"network": NETWORK["ipv6"], "next_hop": NEXT_HOP_IP["ipv6"]},
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]
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}
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}
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logger.info("Configuring static route on router %s", dut)
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result = create_static_routes(tgen, input_dict_static)
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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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input_dict_2 = {
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dut: {
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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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logger.info("Configuring redistribute static route on router %s", dut)
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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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elif test_type == "advertise_nw":
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input_dict_nw = {
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dut: {
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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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"advertise_networks": [{"network": NETWORK["ipv4"]}]
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}
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},
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"ipv6": {
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"unicast": {
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"advertise_networks": [{"network": NETWORK["ipv6"]}]
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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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logger.info(
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"Advertising networks %s %s from router %s",
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NETWORK["ipv4"],
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NETWORK["ipv6"],
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dut,
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)
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result = create_router_bgp(tgen, topo, input_dict_nw)
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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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@pytest.mark.parametrize("ecmp_num", ["8", "16", "32"])
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@pytest.mark.parametrize("test_type", ["redist_static", "advertise_nw"])
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def test_modify_ecmp_max_paths(request, ecmp_num, test_type):
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"""
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Verify routes installed as per maximum-paths
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configuration (8/16/32).
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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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reset_config_on_routers(tgen)
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static_or_nw(tgen, topo, tc_name, test_type, "r2")
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input_dict = {
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"r3": {
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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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"maximum_paths": {
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"ibgp": ecmp_num,
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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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"maximum_paths": {
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"ibgp": ecmp_num,
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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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logger.info("Configuring bgp maximum-paths %s on router r3", ecmp_num)
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result = create_router_bgp(tgen, topo, input_dict)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
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# Verifying RIB routes
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dut = "r3"
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protocol = "bgp"
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for addr_type in ADDR_TYPES:
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input_dict_1 = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
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logger.info("Verifying %s routes on r3", addr_type)
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# Test only the count of nexthops, not the specific nexthop addresses -
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# they're not deterministic
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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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dut,
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input_dict_1,
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next_hop=NEXT_HOPS[addr_type][: int(ecmp_num)],
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protocol=protocol,
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count_only=True,
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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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@pytest.mark.parametrize("ecmp_num", ["8", "16", "32"])
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@pytest.mark.parametrize("test_type", ["redist_static", "advertise_nw"])
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def test_ecmp_after_clear_bgp(request, ecmp_num, test_type):
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"""Verify BGP table and RIB in DUT after clear BGP routes and neighbors"""
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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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reset_config_on_routers(tgen)
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# Verifying RIB routes
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dut = "r3"
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protocol = "bgp"
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static_or_nw(tgen, topo, tc_name, test_type, "r2")
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for addr_type in ADDR_TYPES:
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input_dict_1 = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
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logger.info("Verifying %s routes on r3", addr_type)
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result = verify_rib(
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tgen,
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addr_type,
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dut,
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input_dict_1,
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next_hop=NEXT_HOPS[addr_type][: int(ecmp_num)],
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protocol=protocol,
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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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# Clear BGP
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for addr_type in ADDR_TYPES:
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clear_bgp(tgen, addr_type, dut)
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# Verify BGP convergence
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result = verify_bgp_convergence(tgen, topo)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
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for addr_type in ADDR_TYPES:
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input_dict_1 = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
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logger.info("Verifying %s routes on r3", addr_type)
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result = verify_rib(
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tgen,
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addr_type,
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dut,
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input_dict_1,
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next_hop=NEXT_HOPS[addr_type][: int(ecmp_num)],
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protocol=protocol,
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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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def test_ecmp_remove_redistribute_static(request):
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"""Verify routes are cleared from BGP and RIB table of DUT when
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redistribute static configuration is removed."""
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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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reset_config_on_routers(tgen)
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static_or_nw(tgen, topo, tc_name, "redist_static", "r2")
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for addr_type in ADDR_TYPES:
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# Verifying RIB routes
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dut = "r3"
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protocol = "bgp"
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input_dict_1 = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
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logger.info("Verifying %s routes on r3", addr_type)
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result = verify_rib(
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tgen,
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addr_type,
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dut,
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input_dict_1,
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next_hop=NEXT_HOPS[addr_type],
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protocol=protocol,
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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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input_dict_2 = {
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"r2": {
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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": [{"redist_type": "static", "delete": True}]
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}
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},
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"ipv6": {
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"unicast": {
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"redistribute": [{"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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logger.info("Remove redistribute static")
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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(tc_name, result)
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for addr_type in ADDR_TYPES:
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# Verifying RIB routes
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dut = "r3"
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protocol = "bgp"
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input_dict_1 = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
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logger.info("Verifying %s routes on r3 are deleted", addr_type)
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result = verify_rib(
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tgen,
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addr_type,
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dut,
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input_dict_1,
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next_hop=[],
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protocol=protocol,
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expected=False,
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)
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assert (
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result is not True
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), "Testcase {} : Failed \n Expected: Routes still present in {} RIB. Found: {}".format(
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tc_name, dut, result
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)
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logger.info("Enable redistribute static")
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input_dict_2 = {
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"r2": {
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"bgp": {
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"address_family": {
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"ipv4": {"unicast": {"redistribute": [{"redist_type": "static"}]}},
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"ipv6": {"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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result = create_router_bgp(tgen, topo, input_dict_2)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
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for addr_type in ADDR_TYPES:
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# Verifying RIB routes
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dut = "r3"
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protocol = "bgp"
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input_dict_1 = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
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logger.info("Verifying %s routes on r3", addr_type)
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result = verify_rib(
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tgen,
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addr_type,
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dut,
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input_dict_1,
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next_hop=NEXT_HOPS[addr_type],
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protocol=protocol,
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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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@pytest.mark.parametrize("test_type", ["redist_static", "advertise_nw"])
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def test_ecmp_shut_bgp_neighbor(request, test_type):
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"""Shut BGP neighbors one by one and verify BGP and routing table updated
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accordingly in DUT"""
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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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logger.info(INTF_LIST_R2)
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# Verifying RIB routes
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dut = "r3"
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protocol = "bgp"
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reset_config_on_routers(tgen)
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static_or_nw(tgen, topo, tc_name, test_type, "r2")
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for addr_type in ADDR_TYPES:
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input_dict = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
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logger.info("Verifying %s routes on r3", addr_type)
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result = verify_rib(
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tgen,
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addr_type,
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dut,
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input_dict,
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next_hop=NEXT_HOPS[addr_type],
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protocol=protocol,
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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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for intf_num in range(len(INTF_LIST_R2) + 1, 16):
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intf_val = INTF_LIST_R2[intf_num : intf_num + 16]
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input_dict_1 = {"r2": {"interface_list": [intf_val], "status": "down"}}
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logger.info("Shutting down neighbor interface {} on r2".format(intf_val))
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result = interface_status(tgen, topo, input_dict_1)
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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 addr_type in ADDR_TYPES:
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if intf_num + 16 < 32:
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check_hops = NEXT_HOPS[addr_type]
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else:
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check_hops = []
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|
|
input_dict = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
|
|
logger.info("Verifying %s routes on r3", addr_type)
|
|
result = verify_rib(
|
|
tgen, addr_type, dut, input_dict, next_hop=check_hops, protocol=protocol
|
|
)
|
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(
|
|
tc_name, result
|
|
)
|
|
|
|
input_dict_1 = {"r2": {"interface_list": INTF_LIST_R2, "status": "up"}}
|
|
|
|
logger.info("Enabling all neighbor interface {} on r2")
|
|
result = interface_status(tgen, topo, input_dict_1)
|
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
|
|
|
|
static_or_nw(tgen, topo, tc_name, test_type, "r2")
|
|
for addr_type in ADDR_TYPES:
|
|
input_dict = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
|
|
|
|
logger.info("Verifying %s routes on r3", addr_type)
|
|
result = verify_rib(
|
|
tgen,
|
|
addr_type,
|
|
dut,
|
|
input_dict,
|
|
next_hop=NEXT_HOPS[addr_type],
|
|
protocol=protocol,
|
|
)
|
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(
|
|
tc_name, result
|
|
)
|
|
|
|
write_test_footer(tc_name)
|
|
|
|
|
|
def test_ecmp_remove_static_route(request):
|
|
"""
|
|
Delete static routes and verify routers are cleared from BGP table,
|
|
and RIB of DUT.
|
|
"""
|
|
|
|
tc_name = request.node.name
|
|
write_test_header(tc_name)
|
|
tgen = get_topogen()
|
|
|
|
# Verifying RIB routes
|
|
dut = "r3"
|
|
protocol = "bgp"
|
|
|
|
reset_config_on_routers(tgen)
|
|
|
|
static_or_nw(tgen, topo, tc_name, "redist_static", "r2")
|
|
for addr_type in ADDR_TYPES:
|
|
input_dict_1 = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
|
|
|
|
logger.info("Verifying %s routes on r3", addr_type)
|
|
result = verify_rib(
|
|
tgen,
|
|
addr_type,
|
|
dut,
|
|
input_dict_1,
|
|
next_hop=NEXT_HOPS[addr_type],
|
|
protocol=protocol,
|
|
)
|
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(
|
|
tc_name, result
|
|
)
|
|
|
|
for addr_type in ADDR_TYPES:
|
|
input_dict_2 = {
|
|
"r2": {
|
|
"static_routes": [
|
|
{
|
|
"network": NETWORK[addr_type],
|
|
"next_hop": NEXT_HOP_IP[addr_type],
|
|
"delete": True,
|
|
}
|
|
]
|
|
}
|
|
}
|
|
|
|
logger.info("Remove static routes")
|
|
result = create_static_routes(tgen, input_dict_2)
|
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(
|
|
tc_name, result
|
|
)
|
|
|
|
logger.info("Verifying %s routes on r3 are removed", addr_type)
|
|
result = verify_rib(
|
|
tgen,
|
|
addr_type,
|
|
dut,
|
|
input_dict_2,
|
|
next_hop=[],
|
|
protocol=protocol,
|
|
expected=False,
|
|
)
|
|
assert (
|
|
result is not True
|
|
), "Testcase {} : Failed \n Expected: Routes still present in {} RIB. Found: {}".format(
|
|
tc_name, dut, result
|
|
)
|
|
|
|
for addr_type in ADDR_TYPES:
|
|
# Enable static routes
|
|
input_dict_4 = {
|
|
"r2": {
|
|
"static_routes": [
|
|
{"network": NETWORK[addr_type], "next_hop": NEXT_HOP_IP[addr_type]}
|
|
]
|
|
}
|
|
}
|
|
|
|
logger.info("Enable static route")
|
|
result = create_static_routes(tgen, input_dict_4)
|
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(
|
|
tc_name, result
|
|
)
|
|
|
|
logger.info("Verifying %s routes on r3", addr_type)
|
|
result = verify_rib(
|
|
tgen,
|
|
addr_type,
|
|
dut,
|
|
input_dict_4,
|
|
next_hop=NEXT_HOPS[addr_type],
|
|
protocol=protocol,
|
|
)
|
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(
|
|
tc_name, result
|
|
)
|
|
|
|
write_test_footer(tc_name)
|
|
|
|
|
|
def test_ecmp_remove_nw_advertise(request):
|
|
"""
|
|
Verify routes are cleared from BGP and RIB table of DUT,
|
|
when advertise network configuration is removed
|
|
"""
|
|
|
|
tc_name = request.node.name
|
|
write_test_header(tc_name)
|
|
tgen = get_topogen()
|
|
|
|
# Verifying RIB routes
|
|
dut = "r3"
|
|
protocol = "bgp"
|
|
|
|
reset_config_on_routers(tgen)
|
|
static_or_nw(tgen, topo, tc_name, "advertise_nw", "r2")
|
|
for addr_type in ADDR_TYPES:
|
|
input_dict = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
|
|
|
|
logger.info("Verifying %s routes on r3", addr_type)
|
|
result = verify_rib(
|
|
tgen,
|
|
addr_type,
|
|
dut,
|
|
input_dict,
|
|
next_hop=NEXT_HOPS[addr_type],
|
|
protocol=protocol,
|
|
)
|
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(
|
|
tc_name, result
|
|
)
|
|
|
|
input_dict_3 = {
|
|
"r2": {
|
|
"bgp": {
|
|
"address_family": {
|
|
"ipv4": {
|
|
"unicast": {
|
|
"advertise_networks": [
|
|
{"network": NETWORK["ipv4"], "delete": True}
|
|
]
|
|
}
|
|
},
|
|
"ipv6": {
|
|
"unicast": {
|
|
"advertise_networks": [
|
|
{"network": NETWORK["ipv6"], "delete": True}
|
|
]
|
|
}
|
|
},
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
logger.info("Withdraw advertised networks")
|
|
result = create_router_bgp(tgen, topo, input_dict_3)
|
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
|
|
|
|
for addr_type in ADDR_TYPES:
|
|
input_dict = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
|
|
|
|
logger.info("Verifying %s routes on r3", addr_type)
|
|
result = verify_rib(
|
|
tgen,
|
|
addr_type,
|
|
dut,
|
|
input_dict,
|
|
next_hop=[],
|
|
protocol=protocol,
|
|
expected=False,
|
|
)
|
|
assert (
|
|
result is not True
|
|
), "Testcase {} : Failed \n Expected: Routes still present in {} RIB. Found: {}".format(
|
|
tc_name, dut, result
|
|
)
|
|
|
|
static_or_nw(tgen, topo, tc_name, "advertise_nw", "r2")
|
|
for addr_type in ADDR_TYPES:
|
|
input_dict = {"r3": {"static_routes": [{"network": NETWORK[addr_type]}]}}
|
|
logger.info("Verifying %s routes on r3", addr_type)
|
|
result = verify_rib(
|
|
tgen,
|
|
addr_type,
|
|
dut,
|
|
input_dict,
|
|
next_hop=NEXT_HOPS[addr_type],
|
|
protocol=protocol,
|
|
)
|
|
assert result is True, "Testcase {} : Failed \n Error: {}".format(
|
|
tc_name, result
|
|
)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
args = ["-s"] + sys.argv[1:]
|
|
sys.exit(pytest.main(args))
|