--- /dev/null
+#!/usr/bin/env python
+
+#
+# Copyright (c) 2022 by
+# Louis Scalbert <louis.scalbert@6wind.com>
+#
+# Permission to use, copy, modify, and/or distribute this software
+# for any purpose with or without fee is hereby granted, provided
+# that the above copyright notice and this permission notice appear
+# in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
+# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+# OF THIS SOFTWARE.
+#
+
+"""
+
+"""
+
+import os
+import sys
+import json
+import pytest
+import functools
+
+CWD = os.path.dirname(os.path.realpath(__file__))
+sys.path.append(os.path.join(CWD, "../"))
+
+# pylint: disable=C0413
+from lib import topotest
+from lib.topogen import Topogen, TopoRouter, get_topogen
+from lib.common_config import step
+
+pytestmark = [pytest.mark.bgpd]
+
+
+def build_topo(tgen):
+ for routern in range(1, 4):
+ tgen.add_router("r{}".format(routern))
+
+ switch = tgen.add_switch("s1")
+ switch.add_link(tgen.gears["r1"])
+ switch.add_link(tgen.gears["r2"])
+
+ switch = tgen.add_switch("s2")
+ switch.add_link(tgen.gears["r1"])
+ switch.add_link(tgen.gears["r3"])
+
+
+def setup_module(mod):
+ tgen = Topogen(build_topo, mod.__name__)
+ tgen.start_topology()
+
+ router_list = tgen.routers()
+
+ for routern in range(1, 4):
+ tgen.gears["r{}".format(routern)].cmd("ip link add vrf1 type vrf table 10")
+ tgen.gears["r{}".format(routern)].cmd("ip link set vrf1 up")
+ tgen.gears["r{}".format(routern)].cmd("ip address add dev vrf1 {}.{}.{}.{}/32".format(routern, routern, routern,routern))
+ tgen.gears["r2"].cmd("ip address add dev vrf1 192.0.2.8/32")
+ tgen.gears["r3"].cmd("ip address add dev vrf1 192.0.2.8/32")
+
+ for i, (rname, router) in enumerate(router_list.items(), 1):
+ router.load_config(
+ TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
+ )
+ router.load_config(
+ TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
+ )
+ router.load_config(
+ TopoRouter.RD_LDP, os.path.join(CWD, "{}/ldpd.conf".format(rname))
+ )
+
+ tgen.start_router()
+
+ tgen.gears["r1"].cmd("ip route add 192.0.2.2 via 192.168.1.2 metric 20")
+ tgen.gears["r1"].cmd("ip route add 192.0.2.3 via 192.168.2.2 metric 20")
+
+
+def teardown_module(mod):
+ tgen = get_topogen()
+ tgen.stop_topology()
+
+def test_bgp_path_selection_ecmp():
+ tgen = get_topogen()
+
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ def _bgp_check_path_selection_ecmp():
+ output = json.loads(
+ tgen.gears["r1"].vtysh_cmd("show bgp ipv4 unicast 192.0.2.8/32 json")
+ )
+ expected = {
+ "paths": [
+ {
+ "valid": True,
+ "aspath": {"string": "65002"},
+ "multipath": True,
+ "nexthops": [{"ip": "192.0.2.2", "metric": 20}],
+ },
+ {
+ "valid": True,
+ "aspath": {"string": "65002"},
+ "multipath": True,
+ "nexthops": [{"ip": "192.0.2.3", "metric": 20}],
+ }
+ ]
+ }
+
+ return topotest.json_cmp(output, expected)
+
+ step("Check if two ECMP paths are present")
+ test_func = functools.partial(_bgp_check_path_selection_ecmp)
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
+ assert result is None, "Failed to see BGP prefixes on R1"
+
+
+def test_bgp_path_selection_vpn_ecmp():
+ tgen = get_topogen()
+
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ def _bgp_check_path_selection_vpn_ecmp():
+ output = json.loads(
+ tgen.gears["r1"].vtysh_cmd("show bgp vrf vrf1 ipv4 unicast 192.0.2.8/32 json")
+ )
+ expected = {
+ "paths": [
+ {
+ "valid": True,
+ "aspath": {"string": "65002"},
+ "multipath": True,
+ "nexthops": [{"ip": "192.0.2.2", "metric": 20}],
+ },
+ {
+ "valid": True,
+ "aspath": {"string": "65002"},
+ "multipath": True,
+ "nexthops": [{"ip": "192.0.2.3", "metric": 20}],
+ }
+ ]
+ }
+
+ return topotest.json_cmp(output, expected)
+
+ step("Check if two ECMP paths are present")
+ test_func = functools.partial(_bgp_check_path_selection_vpn_ecmp)
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
+ assert result is None, "Failed to see BGP prefixes on R1"
+
+
+def test_bgp_path_selection_metric():
+ tgen = get_topogen()
+
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ def _bgp_check_path_selection_metric():
+ output = json.loads(
+ tgen.gears["r1"].vtysh_cmd("show bgp ipv4 unicast 192.0.2.8/32 json")
+ )
+ expected = {
+ "paths": [
+ {
+ "valid": True,
+ "aspath": {"string": "65002"},
+ "nexthops": [{"ip": "192.0.2.2", "metric": 10}],
+ "bestpath":{ "selectionReason":"IGP Metric"},
+ },
+ {
+ "valid": True,
+ "aspath": {"string": "65002"},
+ "nexthops": [{"ip": "192.0.2.3", "metric": 20}],
+ }
+ ]
+ }
+
+ return topotest.json_cmp(output, expected)
+
+ tgen.gears["r1"].cmd("ip route add 192.0.2.2 via 192.168.1.2 metric 10")
+ tgen.gears["r1"].cmd("ip route del 192.0.2.2 via 192.168.1.2 metric 20")
+
+ step("Check if IGP metric best path is selected")
+ test_func = functools.partial(_bgp_check_path_selection_metric)
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
+ assert result is None, "Failed to see BGP prefixes on R1"
+
+
+def test_bgp_path_selection_vpn_metric():
+ tgen = get_topogen()
+
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ def _bgp_check_path_selection_vpn_metric():
+ output = json.loads(
+ tgen.gears["r1"].vtysh_cmd("show bgp vrf vrf1 ipv4 unicast 192.0.2.8/32 json")
+ )
+ expected = {
+ "paths": [
+ {
+ "valid": True,
+ "aspath": {"string": "65002"},
+ "nexthops": [{"ip": "192.0.2.2", "metric": 10}],
+ "bestpath":{ "selectionReason":"IGP Metric"},
+ },
+ {
+ "valid": True,
+ "aspath": {"string": "65002"},
+ "nexthops": [{"ip": "192.0.2.3", "metric": 20}],
+ }
+ ]
+ }
+
+ return topotest.json_cmp(output, expected)
+
+ step("Check if IGP metric best path is selected")
+ test_func = functools.partial(_bgp_check_path_selection_vpn_metric)
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
+ assert result is None, "Failed to see BGP prefixes on R1"
+
+
+if __name__ == "__main__":
+ args = ["-s"] + sys.argv[1:]
+ sys.exit(pytest.main(args))
projects / mirror_frr.git / commitdiff