--- /dev/null
+#!/usr/bin/env python
+# SPDX-License-Identifier: ISC
+#
+# test_bgp_vpnv4_per_nexthop_label.py
+#
+# Copyright 2023 6WIND S.A.
+#
+
+"""
+ test_bgp_vpnv4_per_nexthop_label.py: Test the FRR BGP daemon using EBGP peering
+ Let us exchange VPNv4 updates between both devices
+ Updates from r1 will originate from the same RD, but will have separate
+ label values.
+
+ +----------+
+ | r11 |
+ |192.0.2.11+---+
+ | | | +----+--------+ +----------+
+ +----------+ | 192.0.2.1 |vrf | r1 |192.168.0.0/24| r2 |
+ +-------------------+ | 1+--------------+ |
+ +----------+ | |VRF1|AS65500 | | AS65501 |
+ | r12 | | +-------------+ | VPNV4| |VPNV4 |
+ |192.0.2.12+---+ |192.168.255.1+-+--+--------+ +----------+
+ | | |
+ +----------+ |
+ |
+ +----------+ |
+ | r13 | |
+ |192.168. +---------+
+ | 255.13 |
+ +----------+
+"""
+
+import os
+import sys
+import json
+from functools import partial
+import pytest
+import functools
+
+# Save the Current Working Directory to find configuration files.
+CWD = os.path.dirname(os.path.realpath(__file__))
+sys.path.append(os.path.join(CWD, "../"))
+
+# pylint: disable=C0413
+# Import topogen and topotest helpers
+from lib import topotest
+from lib.topogen import Topogen, TopoRouter, get_topogen
+from lib.topolog import logger
+
+
+pytestmark = [pytest.mark.bgpd]
+
+PREFIXES_R11 = ["172.31.0.11/32", "172.31.0.20/32", "172.31.0.111/32"]
+PREFIXES_R12 = ["172.31.0.12/32", "172.31.0.15/32"]
+PREFIXES_R13 = ["172.31.0.13/32"]
+PREFIXES_REDIST = ["172.31.0.14/32"]
+PREFIXES_CONNECTED = ["192.168.255.0/24", "192.0.2.0/24"]
+
+
+def build_topo(tgen):
+ "Build function"
+
+ # Create 2 routers.
+ tgen.add_router("r1")
+ tgen.add_router("r2")
+ tgen.add_router("r11")
+ tgen.add_router("r12")
+ tgen.add_router("r13")
+ tgen.add_router("r14")
+ tgen.add_router("rr")
+
+ 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["r11"])
+ switch.add_link(tgen.gears["r12"])
+ switch.add_link(tgen.gears["rr"])
+
+ switch = tgen.add_switch("s3")
+ switch.add_link(tgen.gears["r2"])
+
+ switch = tgen.add_switch("s4")
+ switch.add_link(tgen.gears["r1"])
+ switch.add_link(tgen.gears["r13"])
+
+ switch = tgen.add_switch("s5")
+ switch.add_link(tgen.gears["r1"])
+ switch.add_link(tgen.gears["r14"])
+
+
+def _populate_iface():
+ tgen = get_topogen()
+ cmds_list = [
+ "ip link add vrf1 type vrf table 10",
+ "echo 100000 > /proc/sys/net/mpls/platform_labels",
+ "ip link set dev vrf1 up",
+ "ip link set dev {0}-eth1 master vrf1",
+ "echo 1 > /proc/sys/net/mpls/conf/{0}-eth0/input",
+ ]
+ cmds_list_plus = [
+ "ip link set dev {0}-eth2 master vrf1",
+ ]
+
+ for cmd in cmds_list:
+ input = cmd.format("r1")
+ logger.info("input: " + cmd)
+ output = tgen.net["r1"].cmd(cmd.format("r1"))
+ logger.info("output: " + output)
+
+ for cmd in cmds_list_plus:
+ input = cmd.format("r1")
+ logger.info("input: " + cmd)
+ output = tgen.net["r1"].cmd(cmd.format("r1"))
+ logger.info("output: " + output)
+
+ for cmd in cmds_list:
+ input = cmd.format("r2")
+ logger.info("input: " + cmd)
+ output = tgen.net["r2"].cmd(cmd.format("r2"))
+ logger.info("output: " + output)
+
+
+def setup_module(mod):
+ "Sets up the pytest environment"
+ tgen = Topogen(build_topo, mod.__name__)
+ tgen.start_topology()
+
+ router_list = tgen.routers()
+ _populate_iface()
+
+ for rname, router in router_list.items():
+ 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))
+ )
+
+ # Initialize all routers.
+ tgen.start_router()
+
+
+def teardown_module(_mod):
+ "Teardown the pytest environment"
+ tgen = get_topogen()
+
+ tgen.stop_topology()
+
+
+def bgp_vpnv4_table_check(router, group, label_list=None, label_value_expected=None):
+ """
+ Dump and check that vpnv4 entries have the same MPLS label value
+ * 'router': the router to check
+ * 'group': the list of prefixes to check. a single label value for the group has to be found
+ * 'label_list': check that the label values are not present in the vpnv4 entries
+ * that list is updated with the present label value
+ * 'label_value_expected': check that the mpls label read is the same as that value
+ """
+
+ stored_label_inited = False
+ for prefix in group:
+ dump = router.vtysh_cmd("show bgp ipv4 vpn {} json".format(prefix), isjson=True)
+ assert dump, "{0}, {1}, route distinguisher not present".format(
+ router.name, prefix
+ )
+ for rd, pathes in dump.items():
+ for path in pathes["paths"]:
+ assert (
+ "remoteLabel" in path.keys()
+ ), "{0}, {1}, remoteLabel not present".format(router.name, prefix)
+ logger.info(
+ "{0}, {1}, label value is {2}".format(
+ router.name, prefix, path["remoteLabel"]
+ )
+ )
+ if stored_label_inited:
+ assert (
+ path["remoteLabel"] == stored_label
+ ), "{0}, {1}, label value not expected one (expected {2}, observed {3}".format(
+ router.name, prefix, stored_label, path["remoteLabel"]
+ )
+ else:
+ stored_label = path["remoteLabel"]
+ stored_label_inited = True
+ if label_list is not None:
+ assert (
+ stored_label not in label_list
+ ), "{0}, {1}, label already detected in a previous prefix".format(
+ router.name, prefix
+ )
+ label_list.add(stored_label)
+
+ if label_value_expected:
+ assert (
+ path["remoteLabel"] == label_value_expected
+ ), "{0}, {1}, label value not expected (expected {2}, observed {3}".format(
+ router.name, prefix, label_value_expected, path["remoteLabel"]
+ )
+
+
+def bgp_vpnv4_table_check_all(router, label_list=None, same=False):
+ """
+ Dump and check that vpnv4 entries are correctly configured with specific label values
+ * 'router': the router to check
+ * 'label_list': check that the label values are not present in the vpnv4 entries
+ * that list is updated with the present label value found.
+ * 'same': by default, set to False. Addresses groups are classified by addresses.
+ * if set to True, all entries of all groups should have a unique label value
+ """
+ if same:
+ bgp_vpnv4_table_check(
+ router,
+ group=PREFIXES_R11
+ + PREFIXES_R12
+ + PREFIXES_R13
+ + PREFIXES_REDIST
+ + PREFIXES_CONNECTED,
+ label_list=label_list,
+ )
+ else:
+ for group in (
+ PREFIXES_R11,
+ PREFIXES_R12,
+ PREFIXES_R13,
+ PREFIXES_REDIST,
+ PREFIXES_CONNECTED,
+ ):
+ bgp_vpnv4_table_check(router, group=group, label_list=label_list)
+
+
+def mpls_table_check(router, blacklist=None, label_list=None, whitelist=None):
+ """
+ Dump and check 'show mpls table json' output. An assert is triggered in case test fails
+ * 'router': the router to check
+ * 'blacklist': the list of nexthops (IP or interface) that should not be on output
+ * 'label_list': the list of labels that should be in inLabel value
+ * 'whitelist': the list of nexthops (IP or interface) that should be on output
+ """
+ nexthop_list = []
+ if blacklist:
+ nexthop_list.append(blacklist)
+ logger.info("Checking MPLS labels on {}".format(router.name))
+ dump = router.vtysh_cmd("show mpls table json", isjson=True)
+ for in_label, label_info in dump.items():
+ if label_list is not None:
+ label_list.add(in_label)
+ for nh in label_info["nexthops"]:
+ assert (
+ nh["installed"] == True and nh["type"] == "BGP"
+ ), "{}, show mpls table, nexthop is not installed".format(router.name)
+ if "nexthop" in nh.keys():
+ assert (
+ nh["nexthop"] not in nexthop_list
+ ), "{}, show mpls table, duplicated or blacklisted nexthop address".format(
+ router.name
+ )
+ nexthop_list.append(nh["nexthop"])
+ elif "interface" in nh.keys():
+ assert (
+ nh["interface"] not in nexthop_list
+ ), "{}, show mpls table, duplicated or blacklisted nexthop interface".format(
+ router.name
+ )
+ nexthop_list.append(nh["interface"])
+ else:
+ assert (
+ 0
+ ), "{}, show mpls table, entry with neither nexthop nor interface".format(
+ router.name
+ )
+
+ if whitelist:
+ for entry in whitelist:
+ assert (
+ entry in nexthop_list
+ ), "{}, show mpls table, entry with nexthop {} not present in nexthop list".format(
+ router.name, entry
+ )
+
+
+def check_show_bgp_vpn_prefix_not_found(router, ipversion, prefix, rd, label=None):
+ output = json.loads(
+ router.vtysh_cmd("show bgp {} vpn {} json".format(ipversion, prefix))
+ )
+ if label:
+ expected = {rd: {"prefix": prefix, "paths": [{"remoteLabel": label}]}}
+ else:
+ expected = {rd: {"prefix": prefix}}
+ ret = topotest.json_cmp(output, expected)
+ if ret is None:
+ return "not good"
+ return None
+
+
+def check_show_bgp_vpn_prefix_found(router, ipversion, prefix, rd):
+ output = json.loads(
+ router.vtysh_cmd("show bgp {} vpn {} json".format(ipversion, prefix))
+ )
+ expected = {rd: {"prefix": prefix}}
+ return topotest.json_cmp(output, expected)
+
+
+def check_show_mpls_table_entry_label_found(router, inlabel, interface):
+ output = json.loads(router.vtysh_cmd("show mpls table {} json".format(inlabel)))
+ expected = {
+ "inLabel": inlabel,
+ "installed": True,
+ "nexthops": [{"interface": interface}],
+ }
+ return topotest.json_cmp(output, expected)
+
+
+def check_show_mpls_table_entry_label_not_found(router, inlabel):
+ output = json.loads(router.vtysh_cmd("show mpls table {} json".format(inlabel)))
+ expected = {"inlabel": inlabel, "installed": True}
+ ret = topotest.json_cmp(output, expected)
+ if ret is None:
+ return "not good"
+ return None
+
+
+def mpls_entry_get_interface(router, label):
+ """
+ Assert that the label is in MPLS table
+ Assert an outgoing interface is programmed
+ return the outgoing interface
+ """
+ outgoing_interface = None
+
+ logger.info("Checking MPLS labels on {}".format(router.name))
+ dump = router.vtysh_cmd("show mpls table {} json".format(label), isjson=True)
+ assert dump, "{0}, label {1} not present".format(router.name, label)
+
+ for nh in dump["nexthops"]:
+ assert (
+ "interface" in nh.keys()
+ ), "{}, show mpls table, nexthop interface not present for MPLS entry {}".format(
+ router.name, label
+ )
+
+ outgoing_interface = nh["interface"]
+
+ return outgoing_interface
+
+
+def test_protocols_convergence():
+ """
+ Assert that all protocols have converged
+ statuses as they depend on it.
+ """
+ tgen = get_topogen()
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ # Check BGP IPv4 routing tables on VRF1 of r1
+ logger.info("Checking BGP IPv4 routes for convergence on r1 VRF1")
+ router = tgen.gears["r1"]
+ json_file = "{}/{}/bgp_ipv4_routes_vrf1.json".format(CWD, router.name)
+ expected = json.loads(open(json_file).read())
+ test_func = partial(
+ topotest.router_json_cmp,
+ router,
+ "show bgp vrf vrf1 ipv4 json",
+ expected,
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=20, wait=0.5)
+ assertmsg = '"{}" JSON output mismatches'.format(router.name)
+ assert result is None, assertmsg
+
+ logger.info("Checking BGP VPNv4 routes for convergence on r2")
+ router = tgen.gears["r2"]
+ json_file = "{}/{}/bgp_vpnv4_routes.json".format(CWD, router.name)
+ expected = json.loads(open(json_file).read())
+ test_func = partial(
+ topotest.router_json_cmp,
+ router,
+ "show bgp ipv4 vpn json",
+ expected,
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
+ assertmsg = '"{}" JSON output mismatches'.format(router.name)
+ assert result is None, assertmsg
+
+ # Check BGP labels received on r2
+ logger.info("Checking BGP VPNv4 labels on r2")
+ label_list = set()
+ bgp_vpnv4_table_check_all(tgen.gears["r2"], label_list)
+
+ # Check MPLS labels received on r1
+ mpls_table_check(tgen.gears["r1"], label_list)
+
+
+def test_flapping_bgp_vrf_down():
+ """
+ Turn down a remote BGP session
+ """
+ tgen = get_topogen()
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+ logger.info("Unpeering BGP on r11")
+ tgen.gears["r11"].vtysh_cmd(
+ "configure terminal\nrouter bgp 65500\nno neighbor 192.0.2.100\n",
+ isjson=False,
+ )
+
+ def _bgp_prefix_not_found(router, vrf, ipversion, prefix):
+ output = json.loads(
+ router.vtysh_cmd(
+ "show bgp vrf {} {} {} json".format(vrf, ipversion, prefix)
+ )
+ )
+ expected = {"prefix": prefix}
+ ret = topotest.json_cmp(output, expected)
+ if ret is None:
+ return "not good"
+ return None
+
+ # Check prefix from r11 is not present
+ test_func = functools.partial(
+ _bgp_prefix_not_found, tgen.gears["r1"], "vrf1", "ipv4", "172.31.0.11/32"
+ )
+ success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
+ assert (
+ success
+ ), "r1, prefix 172.31.0.11/32 from r11 did not disappear. r11 still connected to rr ?"
+
+ # Check BGP updated received on r2 are not from r11
+ logger.info("Checking BGP VPNv4 labels on r2")
+ for entry in PREFIXES_R11:
+ dump = tgen.gears["r2"].vtysh_cmd(
+ "show bgp ipv4 vpn {} json".format(entry), isjson=True
+ )
+ for rd in dump:
+ assert False, "r2, {}, route distinguisher {} present".format(entry, rd)
+
+ mpls_table_check(tgen.gears["r1"], blacklist=["192.0.2.11"])
+
+
+def test_flapping_bgp_vrf_up():
+ """
+ Turn up a remote BGP session
+ """
+ tgen = get_topogen()
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+ logger.info("Peering BGP on r11")
+ tgen.gears["r11"].vtysh_cmd(
+ "configure terminal\nrouter bgp 65500\nneighbor 192.0.2.100 remote-as 65500\n",
+ isjson=False,
+ )
+
+ # Check r2 gets prefix 172.31.0.11/128
+ test_func = functools.partial(
+ check_show_bgp_vpn_prefix_found,
+ tgen.gears["r2"],
+ "ipv4",
+ "172.31.0.11/32",
+ "444:1",
+ )
+ success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
+ assert (
+ success
+ ), "r2, prefix 172.31.0.11/32 from r11 not present. r11 still disconnected from rr ?"
+ bgp_vpnv4_table_check_all(tgen.gears["r2"])
+
+
+def test_recursive_route():
+ """
+ Test static recursive route redistributed over BGP
+ """
+ tgen = get_topogen()
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ logger.info("Enabling recursive static route")
+ tgen.gears["r1"].vtysh_cmd(
+ "configure terminal\nvrf vrf1\nip route 172.31.0.30/32 172.31.0.20\n",
+ isjson=False,
+ )
+ logger.info("Checking BGP VPNv4 labels on r2")
+
+ # Check r2 received vpnv4 update with 172.31.0.30
+ test_func = functools.partial(
+ check_show_bgp_vpn_prefix_found,
+ tgen.gears["r2"],
+ "ipv4",
+ "172.31.0.30/32",
+ "444:1",
+ )
+ success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
+ assert success, "r2, vpnv4 update 172.31.0.30 not found"
+
+ bgp_vpnv4_table_check(tgen.gears["r2"], group=PREFIXES_R11 + ["172.31.0.30/32"])
+
+ # diagnostic
+ logger.info("Dumping label nexthop table")
+ tgen.gears["r1"].vtysh_cmd("show bgp vrf vrf1 label-nexthop detail", isjson=False)
+ logger.info("Dumping nexthop table")
+ tgen.gears["r1"].vtysh_cmd("show bgp vrf vrf1 nexthop detail", isjson=False)
+
+ logger.info("Disabling recursive static route")
+ tgen.gears["r1"].vtysh_cmd(
+ "configure terminal\nvrf vrf1\nno ip route 172.31.0.30/32 172.31.0.20\n",
+ isjson=False,
+ )
+ logger.info("Checking BGP VPNv4 labels on r2")
+
+ # Check r2 removed 172.31.0.30 vpnv4 update
+ test_func = functools.partial(
+ check_show_bgp_vpn_prefix_not_found,
+ tgen.gears["r2"],
+ "ipv4",
+ "172.31.0.30/32",
+ "444:1",
+ )
+ success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
+ assert success, "r2, vpnv4 update 172.31.0.30 still present"
+
+
+def test_prefix_changes_interface():
+ """
+ Test BGP update for a given prefix learnt on different interface
+ """
+ tgen = get_topogen()
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ logger.info("Enabling a 172.31.0.50/32 prefix for r11")
+ tgen.gears["r11"].vtysh_cmd(
+ "configure terminal\nrouter bgp\naddress-family ipv4 unicast\nnetwork 172.31.0.50/32",
+ isjson=False,
+ )
+
+ # Check r2 received vpnv4 update with 172.31.0.50
+ test_func = functools.partial(
+ check_show_bgp_vpn_prefix_found,
+ tgen.gears["r2"],
+ "ipv4",
+ "172.31.0.50/32",
+ "444:1",
+ )
+ success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
+ assert success, "r2, vpnv4 update 172.31.0.50 not found"
+
+ # diagnostic
+ logger.info("Dumping label nexthop table")
+ tgen.gears["r1"].vtysh_cmd("show bgp vrf vrf1 label-nexthop detail", isjson=False)
+
+ label_list = set()
+ bgp_vpnv4_table_check(
+ tgen.gears["r2"],
+ group=["172.31.0.11/32", "172.31.0.111/32", "172.31.0.50/32"],
+ label_list=label_list,
+ )
+
+ assert (
+ len(label_list) == 1
+ ), "Multiple Label values found for updates from r11 found"
+
+ oldlabel = label_list.pop()
+ logger.info("r1, getting the outgoing interface used by label {}".format(oldlabel))
+ old_outgoing_interface = mpls_entry_get_interface(tgen.gears["r1"], oldlabel)
+ logger.info(
+ "r1, outgoing interface used by label {} is {}".format(
+ oldlabel, old_outgoing_interface
+ )
+ )
+
+ logger.info("Moving the 172.31.0.50/32 prefix from r11 to r13")
+ tgen.gears["r11"].vtysh_cmd(
+ "configure terminal\nrouter bgp\naddress-family ipv4 unicast\nno network 172.31.0.50/32",
+ isjson=False,
+ )
+ tgen.gears["r13"].vtysh_cmd(
+ "configure terminal\nrouter bgp\naddress-family ipv4 unicast\nnetwork 172.31.0.50/32",
+ isjson=False,
+ )
+
+ # Check r2 removed 172.31.0.50 vpnv4 update with old label
+ test_func = functools.partial(
+ check_show_bgp_vpn_prefix_not_found,
+ tgen.gears["r2"],
+ "ipv4",
+ "172.31.0.50/32",
+ "444:1",
+ label=oldlabel,
+ )
+ success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
+ assert (
+ success
+ ), "r2, vpnv4 update 172.31.0.50 with old label {0} still present".format(oldlabel)
+
+ # diagnostic
+ logger.info("Dumping label nexthop table")
+ tgen.gears["r1"].vtysh_cmd("show bgp vrf vrf1 label-nexthop detail", isjson=False)
+
+ # Check r2 received new 172.31.0.50 vpnv4 update
+ test_func = functools.partial(
+ check_show_bgp_vpn_prefix_found,
+ tgen.gears["r2"],
+ "ipv4",
+ "172.31.0.50/32",
+ "444:1",
+ )
+ success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
+ assert success, "r2, vpnv4 update 172.31.0.50 not found"
+
+ label_list = set()
+ bgp_vpnv4_table_check(
+ tgen.gears["r2"],
+ group=PREFIXES_R13 + ["172.31.0.50/32"],
+ label_list=label_list,
+ )
+ assert (
+ len(label_list) == 1
+ ), "Multiple Label values found for updates from r13 found"
+
+ newlabel = label_list.pop()
+ logger.info("r1, getting the outgoing interface used by label {}".format(newlabel))
+ new_outgoing_interface = mpls_entry_get_interface(tgen.gears["r1"], newlabel)
+ logger.info(
+ "r1, outgoing interface used by label {} is {}".format(
+ newlabel, new_outgoing_interface
+ )
+ )
+ if old_outgoing_interface == new_outgoing_interface:
+ assert 0, "r1, outgoing interface did not change whereas BGP update moved"
+
+ logger.info("Restoring state by removing the 172.31.0.50/32 prefix from r13")
+ tgen.gears["r13"].vtysh_cmd(
+ "configure terminal\nrouter bgp\naddress-family ipv4 unicast\nno network 172.31.0.50/32",
+ isjson=False,
+ )
+
+
+def test_changing_default_label_value():
+ """
+ Change the MPLS default value
+ Check that r1 VPNv4 entries have the 222 label value
+ Check that MPLS entry with old label value is no more present
+ Check that MPLS entry for local traffic has inLabel set to 222
+ """
+ tgen = get_topogen()
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ router = tgen.gears["r1"]
+
+ # counting the number of labels used in the VPNv4 table
+ label_list = set()
+ logger.info("r1, vpnv4 table, check the number of labels used before modification")
+ bgp_vpnv4_table_check_all(router, label_list)
+ old_len = len(label_list)
+ assert (
+ old_len != 1
+ ), "r1, number of labels used should be greater than 1, oberved {} ".format(old_len)
+
+ logger.info("r1, vrf1, changing the default MPLS label value to export to 222")
+ router.vtysh_cmd(
+ "configure terminal\nrouter bgp 65500 vrf vrf1\naddress-family ipv4 unicast\nlabel vpn export 222\n",
+ isjson=False,
+ )
+
+ # Check r1 updated the MPLS entry with the 222 label value
+ logger.info(
+ "r1, mpls table, check that MPLS entry with inLabel set to 222 has vrf1 interface"
+ )
+ test_func = functools.partial(
+ check_show_mpls_table_entry_label_found, router, 222, "vrf1"
+ )
+ success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
+ assert success, "r1, mpls entry with label 222 not found"
+
+ # check label repartition is ok
+ logger.info("r1, vpnv4 table, check the number of labels used after modification")
+ label_list = set()
+ bgp_vpnv4_table_check_all(router, label_list)
+ new_len = len(label_list)
+ assert (
+ old_len == new_len
+ ), "r1, number of labels after modification differ from previous, observed {}, expected {} ".format(
+ new_len, old_len
+ )
+
+ logger.info(
+ "r1, vpnv4 table, check that prefixes that were using the vrf label have refreshed the label value to 222"
+ )
+ bgp_vpnv4_table_check(
+ router, group=["192.168.255.0/24", "192.0.2.0/24"], label_value_expected=222
+ )
+
+
+def test_unconfigure_allocation_mode_nexthop():
+ """
+ Test unconfiguring allocation mode per nexthop
+ Check that show mpls table has no entry with label 17 (previously used)
+ Check that all VPN updates on r1 should have label value moved to 222
+ Check that show mpls table will only have 222 label value
+ """
+ tgen = get_topogen()
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ logger.info("Unconfiguring allocation mode per nexthop")
+ router = tgen.gears["r1"]
+ router.vtysh_cmd(
+ "configure terminal\nrouter bgp 65500 vrf vrf1\naddress-family ipv4 unicast\nno label vpn export allocation-mode per-nexthop\n",
+ isjson=False,
+ )
+
+ # Check r1 updated the MPLS entry with the 222 label value
+ logger.info(
+ "r1, mpls table, check that MPLS entry with inLabel set to 17 is not present"
+ )
+ test_func = functools.partial(
+ check_show_mpls_table_entry_label_not_found, router, 17
+ )
+ success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
+ assert success, "r1, mpls entry with label 17 still present"
+
+ # Check vpnv4 routes from r1
+ logger.info("Checking vpnv4 routes on r1")
+ label_list = set()
+ bgp_vpnv4_table_check_all(router, label_list=label_list, same=True)
+ assert len(label_list) == 1, "r1, multiple Label values found for vpnv4 updates"
+
+ new_label = label_list.pop()
+ assert (
+ new_label == 222
+ ), "r1, wrong label value in VPNv4 table, expected 222, observed {}".format(
+ new_label
+ )
+
+ # Check mpls table with 222 value
+ logger.info("Checking MPLS values on show mpls table of r1")
+ label_list = set()
+ label_list.add(222)
+ mpls_table_check(router, label_list=label_list)
+
+
+def test_reconfigure_allocation_mode_nexthop():
+ """
+ Test re-configuring allocation mode per nexthop
+ Check that show mpls table has no entry with label 17
+ Check that all VPN updates on r1 should have multiple label values and not only 222
+ Check that show mpls table will have multiple label values and not only 222
+ """
+ tgen = get_topogen()
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ logger.info("Reconfiguring allocation mode per nexthop")
+ router = tgen.gears["r1"]
+ router.vtysh_cmd(
+ "configure terminal\nrouter bgp 65500 vrf vrf1\naddress-family ipv4 unicast\nlabel vpn export allocation-mode per-nexthop\n",
+ isjson=False,
+ )
+
+ # Check that show mpls table has no entry with label 17
+ logger.info(
+ "r1, mpls table, check that MPLS entry with inLabel set to 17 is present"
+ )
+ test_func = functools.partial(
+ check_show_mpls_table_entry_label_not_found, router, 17
+ )
+ success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
+ assert success, "r1, mpls entry with label 17 still present"
+
+ # Check vpnv4 routes from r1
+ logger.info("Checking vpnv4 routes on r1")
+ label_list = set()
+ bgp_vpnv4_table_check_all(router, label_list=label_list)
+ assert len(label_list) != 1, "r1, only 1 label values found for vpnv4 updates"
+
+ # Check mpls table with all values
+ logger.info("Checking MPLS values on show mpls table of r1")
+ mpls_table_check(router, label_list=label_list)
+
+
+def test_memory_leak():
+ "Run the memory leak test and report results."
+ tgen = get_topogen()
+ if not tgen.is_memleak_enabled():
+ pytest.skip("Memory leak test/report is disabled")
+
+ tgen.report_memory_leaks()
+
+
+if __name__ == "__main__":
+ args = ["-s"] + sys.argv[1:]
+ sys.exit(pytest.main(args))
projects / mirror_frr.git / commitdiff