[mirror_frr.git] / tests / topotests / multicast_pim_sm_topo3 / test_multicast_pim_sm_topo4.py

#!/usr/bin/env python

#
# Copyright (c) 2020 by VMware, Inc. ("VMware")
# Used Copyright (c) 2018 by Network Device Education Foundation,
# Inc. ("NetDEF") in this file.
#
# 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 VMWARE DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL VMWARE 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.
#

"""
Following tests are covered to test multicast pim sm:

Test steps
- Create topology (setup module)
- Bring up topology

Following tests are covered:

1. TC:48 Verify mroute after configuring black-hole route for RP and source
2. TC:49 Verify mroute when RP is reachable using default route
3. TC:50 Verify mroute when LHR,FHR,RP and transit routers reachable
    using default routes
4. TC:52 Verify PIM nbr after changing interface ip
5. TC:53 Verify IGMP interface updated with correct detail after changing interface config
6. TC:54 Verify received and transmit hello stats are getting cleared after PIM nbr reset


"""

import os
import sys
import time
import pytest

pytestmark = pytest.mark.pimd

# Save the Current Working Directory to find configuration files.
CWD = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(CWD, "../"))
sys.path.append(os.path.join(CWD, "../lib/"))

# Required to instantiate the topology builder class.

# pylint: disable=C0413
# Import topogen and topotest helpers
from lib.topogen import Topogen, get_topogen

from lib.common_config import (
    start_topology,
    write_test_header,
    write_test_footer,
    step,
    reset_config_on_routers,
    shutdown_bringup_interface,
    apply_raw_config,
    create_static_routes,
    required_linux_kernel_version,
    topo_daemons,
)
from lib.pim import (
    create_pim_config,
    create_igmp_config,
    verify_mroutes,
    clear_pim_interface_traffic,
    verify_upstream_iif,
    clear_mroute,
    verify_pim_rp_info,
    get_pim_interface_traffic,
    McastTesterHelper,
)
from lib.topolog import logger
from lib.topojson import build_config_from_json
from time import sleep


TOPOLOGY = """


    i4-----c1-------------c2---i5
            |              |
            |              |
    i1-----l1------r2-----f1---i2
       |    |      |       |
       |    |      |       |
      i7    i6     i3     i8

    Description:
    i1, i2, i3. i4, i5, i6, i7, i8 - FRR running iperf to send IGMP
                                     join and traffic
    l1 - LHR
    f1 - FHR
    r2 - FRR router
    c1 - FRR router
    c2 - FRR router
"""

# Global variables

GROUP_RANGE = "224.0.0.0/4"
IGMP_GROUP = "225.1.1.1/32"
IGMP_JOIN = "225.1.1.1"
GROUP_RANGE_1 = [
    "225.1.1.1/32",
    "225.1.1.2/32",
    "225.1.1.3/32",
    "225.1.1.4/32",
    "225.1.1.5/32",
]
IGMP_JOIN_RANGE_1 = ["225.1.1.1", "225.1.1.2", "225.1.1.3", "225.1.1.4", "225.1.1.5"]
NEW_ADDRESS_1 = "192.168.20.1"
NEW_ADDRESS_2 = "192.168.20.2"
NEW_ADDRESS_1_SUBNET = "192.168.20.1/24"
NEW_ADDRESS_2_SUBNET = "192.168.20.2/24"


def setup_module(mod):
    """
    Sets up the pytest environment

    * `mod`: module name
    """

    # Required linux kernel version for this suite to run.
    result = required_linux_kernel_version("4.19")
    if result is not True:
        pytest.skip("Kernel requirements are not met")

    testsuite_run_time = time.asctime(time.localtime(time.time()))
    logger.info("Testsuite start time: {}".format(testsuite_run_time))
    logger.info("=" * 40)
    logger.info("Master Topology: \n {}".format(TOPOLOGY))

    logger.info("Running setup_module to create topology")

    json_file = "{}/multicast_pim_sm_topo4.json".format(CWD)
    tgen = Topogen(json_file, mod.__name__)
    global topo
    topo = tgen.json_topo
    # ... and here it calls Mininet initialization functions.

    # get list of daemons needs to be started for this suite.
    daemons = topo_daemons(tgen, topo)

    # Starting topology, create tmp files which are loaded to routers
    #  to start daemons and then start routers
    start_topology(tgen, daemons)

    # Don"t run this test if we have any failure.
    if tgen.routers_have_failure():
        pytest.skip(tgen.errors)

    # Creating configuration from JSON
    build_config_from_json(tgen, topo)

    # XXX Replace this using "with McastTesterHelper()... " in each test if possible.
    global app_helper
    app_helper = McastTesterHelper(tgen)

    logger.info("Running setup_module() done")


def teardown_module():
    """Teardown the pytest environment"""

    logger.info("Running teardown_module to delete topology")

    tgen = get_topogen()

    app_helper.cleanup()

    # Stop toplogy and Remove tmp files
    tgen.stop_topology()

    logger.info(
        "Testsuite end time: {}".format(time.asctime(time.localtime(time.time())))
    )
    logger.info("=" * 40)


#####################################################
#
#   Testcases
#
#####################################################


def reset_stats(stats):
    """
    API to reset the stats

    Parameters
    ----------
    * `stats` : State dictionary holding helloRx and helloTx values
    """

    for router, state_data in stats.items():
        for state, value in state_data.items():
            stats[router][state] = 0
            logger.info(
                "[DUT: %s]: stats %s value has reset" " reset, Current value: %s",
                router,
                state,
                stats[router][state],
            )

    return True


def verify_state_incremented(state_before, state_after):
    """
    API to compare interface traffic state incrementing

    Parameters
    ----------
    * `state_before` : State dictionary for any particular instance
    * `state_after` : State dictionary for any particular instance
    """

    for router, state_data in state_before.items():
        for state, value in state_data.items():
            if state_before[router][state] >= state_after[router][state]:
                errormsg = (
                    "[DUT: %s]: state %s value has not"
                    " incremented, Initial value: %s, "
                    "Current value: %s [FAILED!!]"
                    % (
                        router,
                        state,
                        state_before[router][state],
                        state_after[router][state],
                    )
                )
                return errormsg

            logger.info(
                "[DUT: %s]: State %s value is "
                "incremented, Initial value: %s, Current value: %s"
                " [PASSED!!]",
                router,
                state,
                state_before[router][state],
                state_after[router][state],
            )

    return True


def test_mroute_when_RP_reachable_default_route_p2(request):
    """
    TC_49 Verify mroute when and source RP is reachable using default route
    """

    tgen = get_topogen()
    tc_name = request.node.name
    write_test_header(tc_name)

    # Don"t run this test if we have any failure.
    if tgen.routers_have_failure():
        pytest.skip(tgen.errors)

    # Creating configuration from JSON
    app_helper.stop_all_hosts()
    clear_mroute(tgen)
    reset_config_on_routers(tgen)
    clear_pim_interface_traffic(tgen, topo)

    step(
        "Remove c1-c2 connected link to simulate topo "
        "c1(FHR)---l1(RP)----r2---f1-----c2(LHR)"
    )

    intf_c1_c2 = topo["routers"]["c1"]["links"]["c2"]["interface"]
    intf_c2_c1 = topo["routers"]["c2"]["links"]["c1"]["interface"]
    shutdown_bringup_interface(tgen, "c1", intf_c1_c2, False)
    shutdown_bringup_interface(tgen, "c2", intf_c2_c1, False)

    step("Enable the PIM on all the interfaces of FRR1, FRR2, FRR3")
    step(
        "Enable IGMP of FRR1 interface and send IGMP joins "
        " from FRR1 node for group range (225.1.1.1-5)"
    )

    intf_c2_i5 = topo["routers"]["c2"]["links"]["i5"]["interface"]
    input_dict = {
        "c2": {"igmp": {"interfaces": {intf_c2_i5: {"igmp": {"version": "2"}}}}}
    }
    result = create_igmp_config(tgen, topo, input_dict)
    assert result is True, "Testcase {}: Failed Error: {}".format(tc_name, result)

    input_join = {"i5": topo["routers"]["i5"]["links"]["c2"]["interface"]}

    for recvr, recvr_intf in input_join.items():
        result = app_helper.run_join(recvr, IGMP_JOIN_RANGE_1, join_intf=recvr_intf)
        assert result is True, "Testcase {}: Failed Error: {}".format(tc_name, result)

    step("Configure static RP for (225.1.1.1-5) as R2")

    input_dict = {
        "l1": {
            "pim": {
                "rp": [
                    {
                        "rp_addr": topo["routers"]["l1"]["links"]["lo"]["ipv4"].split(
                            "/"
                        )[0],
                        "group_addr_range": GROUP_RANGE,
                    }
                ]
            }
        }
    }

    result = create_pim_config(tgen, topo, input_dict)
    assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    step("Send traffic from C1 to all the groups ( 225.1.1.1 to 225.1.1.5)")

    input_src = {"i4": topo["routers"]["i4"]["links"]["c1"]["interface"]}

    for src, src_intf in input_src.items():
        result = app_helper.run_traffic(src, IGMP_JOIN_RANGE_1, bind_intf=src_intf)
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    source_i4 = topo["routers"]["i4"]["links"]["c1"]["ipv4"].split("/")[0]

    input_dict_starg = [
        {
            "dut": "c2",
            "src_address": "*",
            "iif": topo["routers"]["c2"]["links"]["f1"]["interface"],
            "oil": topo["routers"]["c2"]["links"]["i5"]["interface"],
        }
    ]

    input_dict_sg = [
        {
            "dut": "c2",
            "src_address": source_i4,
            "iif": topo["routers"]["c2"]["links"]["f1"]["interface"],
            "oil": topo["routers"]["c2"]["links"]["i5"]["interface"],
        }
    ]

    step("Verify mroutes and iff upstream")

    for data in input_dict_sg:
        result = verify_mroutes(
            tgen,
            data["dut"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            data["iif"],
            data["oil"],
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

        result = verify_upstream_iif(
            tgen, data["dut"], data["iif"], data["src_address"], IGMP_JOIN_RANGE_1
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    for data in input_dict_starg:
        result = verify_mroutes(
            tgen,
            data["dut"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            data["iif"],
            data["oil"],
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

        result = verify_upstream_iif(
            tgen, data["dut"], data["iif"], data["src_address"], IGMP_JOIN_RANGE_1
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    step("Delete static routes on c2")
    input_dict = {
        "c2": {
            "static_routes": [
                {
                    "network": ["1.0.4.11/32", "10.0.2.1/24", "10.0.1.2/24"],
                    "next_hop": "10.0.3.2",
                    "delete": True,
                }
            ]
        }
    }

    result = create_static_routes(tgen, input_dict)
    assert result is True, "Testcase {} :Failed \n Error {}".format(tc_name, result)

    step("Verify RP info unknown after removing static route from c2 ")
    dut = "c2"
    rp_address = topo["routers"]["l1"]["links"]["lo"]["ipv4"].split("/")[0]
    SOURCE = "Static"
    result = verify_pim_rp_info(
        tgen, topo, dut, GROUP_RANGE_1, "Unknown", rp_address, SOURCE
    )
    assert result is True, "Testcase {} :Failed \n Error: {}".format(tc_name, result)

    step("Verify mroute not present after Delete of static routes on c1")

    for data in input_dict_sg:
        result = verify_mroutes(
            tgen,
            data["dut"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            data["iif"],
            data["oil"],
            expected=False,
        )
        assert result is not True, (
            "Testcase {} : Failed \n "
            "mroutes(S,G) are present after delete of static routes on c1 \n Error: {}".format(
                tc_name, result
            )
        )

        result = verify_upstream_iif(
            tgen,
            data["dut"],
            data["iif"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            expected=False,
        )
        assert result is not True, (
            "Testcase {} : Failed \n "
            "upstream is present after delete of static routes on c1 \n Error: {}".format(
                tc_name, result
            )
        )

    for data in input_dict_starg:
        result = verify_mroutes(
            tgen,
            data["dut"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            data["iif"],
            data["oil"],
            expected=False,
        )
        assert result is not True, (
            "Testcase {} : Failed \n "
            "mroutes(*,G) are present after delete of static routes on c1 \n Error: {}".format(
                tc_name, result
            )
        )

        result = verify_upstream_iif(
            tgen,
            data["dut"],
            data["iif"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            expected=False,
        )
        assert result is not True, (
            "Testcase {} : Failed \n "
            "upstream is present after delete of static routes on c1 \n Error: {}".format(
                tc_name, result
            )
        )

    step("Configure default routes on c2")

    intf_f1_c2 = topo["routers"]["f1"]["links"]["c2"]["ipv4"].split("/")[0]

    input_dict = {
        "c2": {"static_routes": [{"network": "0.0.0.0/0", "next_hop": intf_f1_c2}]}
    }
    result = create_static_routes(tgen, input_dict)
    assert result is True, "Testcase {} :Failed \n Error {}".format(tc_name, result)

    step("applying ip nht config  on c2")

    raw_config = {"c2": {"raw_config": ["ip nht resolve-via-default"]}}

    result = apply_raw_config(tgen, raw_config)
    assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    step("Verify RP info is NOT unknown after removing static route from c2 ")
    result = verify_pim_rp_info(
        tgen, topo, dut, GROUP_RANGE_1, "Unknown", rp_address, SOURCE, expected=False
    )
    assert result is not True, (
        "Testcase {} : Failed \n "
        "RP info is unknown after removing static route from c2 \n Error: {}".format(
            tc_name, result
        )
    )

    step("Verify (s,g) populated after adding default route ")

    for data in input_dict_sg:
        result = verify_mroutes(
            tgen,
            data["dut"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            data["iif"],
            data["oil"],
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

        result = verify_upstream_iif(
            tgen, data["dut"], data["iif"], data["src_address"], IGMP_JOIN_RANGE_1
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    step("Verify (*,g) populated after adding default route ")

    for data in input_dict_starg:
        result = verify_mroutes(
            tgen,
            data["dut"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            data["iif"],
            data["oil"],
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

        result = verify_upstream_iif(
            tgen, data["dut"], data["iif"], data["src_address"], IGMP_JOIN_RANGE_1
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    write_test_footer(tc_name)


def test_mroute_with_RP_default_route_all_nodes_p2(request):
    """
    TC_50 Verify mroute when LHR,FHR,RP and transit routers reachable
    using default routes
    """

    tgen = get_topogen()
    tc_name = request.node.name
    write_test_header(tc_name)

    # Don"t run this test if we have any failure.
    if tgen.routers_have_failure():
        pytest.skip(tgen.errors)

    # Creating configuration from JSON
    app_helper.stop_all_hosts()
    clear_mroute(tgen)
    reset_config_on_routers(tgen)
    clear_pim_interface_traffic(tgen, topo)

    step(
        "Remove c1-c2 connected link to simulate topo "
        "c1(LHR)---l1(RP)----r2---f1-----c2(FHR)"
    )

    intf_c1_c2 = topo["routers"]["c1"]["links"]["c2"]["interface"]
    intf_c2_c1 = topo["routers"]["c2"]["links"]["c1"]["interface"]
    shutdown_bringup_interface(tgen, "c1", intf_c1_c2, False)
    shutdown_bringup_interface(tgen, "c2", intf_c2_c1, False)

    step("Enable the PIM on all the interfaces of FRR1, FRR2, FRR3")
    step(
        "Enable IGMP of FRR1 interface and send IGMP joins "
        " from FRR1 node for group range (225.1.1.1-5)"
    )

    intf_c1_i4 = topo["routers"]["c1"]["links"]["i4"]["interface"]
    input_dict = {
        "c1": {"igmp": {"interfaces": {intf_c1_i4: {"igmp": {"version": "2"}}}}}
    }
    result = create_igmp_config(tgen, topo, input_dict)
    assert result is True, "Testcase {}: Failed Error: {}".format(tc_name, result)

    input_join = {"i4": topo["routers"]["i4"]["links"]["c1"]["interface"]}

    for recvr, recvr_intf in input_join.items():
        result = app_helper.run_join(recvr, IGMP_JOIN_RANGE_1, join_intf=recvr_intf)
        assert result is True, "Testcase {}: Failed Error: {}".format(tc_name, result)

    step("Configure static RP for (225.1.1.1-5) as R2")

    input_dict = {
        "l1": {
            "pim": {
                "rp": [
                    {
                        "rp_addr": topo["routers"]["l1"]["links"]["lo"]["ipv4"].split(
                            "/"
                        )[0],
                        "group_addr_range": GROUP_RANGE,
                    }
                ]
            }
        }
    }

    result = create_pim_config(tgen, topo, input_dict)
    assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    step("Send traffic from C2 to all the groups ( 225.1.1.1 to 225.1.1.5)")

    input_src = {"i5": topo["routers"]["i5"]["links"]["c2"]["interface"]}

    for src, src_intf in input_src.items():
        result = app_helper.run_traffic(src, IGMP_JOIN_RANGE_1, bind_intf=src_intf)
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    source_i5 = topo["routers"]["i5"]["links"]["c2"]["ipv4"].split("/")[0]

    input_dict_starg = [
        {
            "dut": "c1",
            "src_address": "*",
            "iif": topo["routers"]["c1"]["links"]["l1"]["interface"],
            "oil": topo["routers"]["c1"]["links"]["i4"]["interface"],
        }
    ]

    input_dict_sg = [
        {
            "dut": "c1",
            "src_address": source_i5,
            "iif": topo["routers"]["c1"]["links"]["l1"]["interface"],
            "oil": topo["routers"]["c1"]["links"]["i4"]["interface"],
        }
    ]

    step("Verify mroutes and iff upstream")

    for data in input_dict_sg:
        result = verify_mroutes(
            tgen,
            data["dut"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            data["iif"],
            data["oil"],
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

        result = verify_upstream_iif(
            tgen, data["dut"], data["iif"], data["src_address"], IGMP_JOIN_RANGE_1
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    for data in input_dict_starg:
        result = verify_mroutes(
            tgen,
            data["dut"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            data["iif"],
            data["oil"],
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

        result = verify_upstream_iif(
            tgen, data["dut"], data["iif"], data["src_address"], IGMP_JOIN_RANGE_1
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    step("Delete static routes RP on all the nodes")
    input_dict = {
        "c2": {
            "static_routes": [
                {"network": ["1.0.4.11/32"], "next_hop": "10.0.3.2", "delete": True}
            ]
        },
        "c1": {
            "static_routes": [
                {"network": ["1.0.4.11/32"], "next_hop": "10.0.2.2", "delete": True}
            ]
        },
        "r2": {
            "static_routes": [
                {"network": ["1.0.4.11/32"], "next_hop": "10.0.12.1", "delete": True}
            ]
        },
        "f1": {
            "static_routes": [
                {"network": ["1.0.4.11/32"], "next_hop": "10.0.7.2", "delete": True}
            ]
        },
    }

    result = create_static_routes(tgen, input_dict)
    assert result is True, "Testcase {} :Failed \n Error {}".format(tc_name, result)

    step("Verify RP info unknown after removing static route from c2 ")
    dut = "c2"
    rp_address = topo["routers"]["l1"]["links"]["lo"]["ipv4"].split("/")[0]
    SOURCE = "Static"
    result = verify_pim_rp_info(
        tgen, topo, dut, GROUP_RANGE_1, "Unknown", rp_address, SOURCE
    )
    assert result is True, "Testcase {} :Failed \n Error: {}".format(tc_name, result)

    for data in input_dict_starg:
        result = verify_mroutes(
            tgen,
            data["dut"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            data["iif"],
            data["oil"],
            expected=False,
        )
        assert (
            result is not True
        ), "Testcase {} : Failed \n " "mroutes are still present \n Error: {}".format(
            tc_name, result
        )

        result = verify_upstream_iif(
            tgen,
            data["dut"],
            data["iif"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            expected=False,
        )
        assert (
            result is not True
        ), "Testcase {} : Failed \n " "upstream is still present \n Error: {}".format(
            tc_name, result
        )

    step("Configure default routes on all the nodes")

    intf_f1_c2 = topo["routers"]["f1"]["links"]["c2"]["ipv4"].split("/")[0]
    intf_l1_c1 = topo["routers"]["l1"]["links"]["c1"]["ipv4"].split("/")[0]
    intf_l1_r2 = topo["routers"]["l1"]["links"]["r2"]["ipv4"].split("/")[0]
    intf_r2_f1 = topo["routers"]["r2"]["links"]["f1"]["ipv4"].split("/")[0]

    input_dict = {
        "c1": {"static_routes": [{"network": "0.0.0.0/0", "next_hop": intf_l1_c1}]},
        "c2": {"static_routes": [{"network": "0.0.0.0/0", "next_hop": intf_f1_c2}]},
        "r2": {"static_routes": [{"network": "0.0.0.0/0", "next_hop": intf_l1_r2}]},
        "f1": {"static_routes": [{"network": "0.0.0.0/0", "next_hop": intf_r2_f1}]},
    }
    result = create_static_routes(tgen, input_dict)
    assert result is True, "Testcase {} :Failed \n Error {}".format(tc_name, result)

    step("applying ip nht config  on c2")

    raw_config = {
        "c1": {"raw_config": ["ip nht resolve-via-default"]},
        "c2": {"raw_config": ["ip nht resolve-via-default"]},
        "r2": {"raw_config": ["ip nht resolve-via-default"]},
        "f1": {"raw_config": ["ip nht resolve-via-default"]},
        "l1": {"raw_config": ["ip nht resolve-via-default"]},
    }

    result = apply_raw_config(tgen, raw_config)
    assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    step("Verify RP info Not unknown after removing static route from c2 ")
    dut = "c2"
    step("Verify RP info is NOT unknown after removing static route from c2 ")
    result = verify_pim_rp_info(
        tgen, topo, dut, GROUP_RANGE_1, "Unknown", rp_address, SOURCE, expected=False
    )
    assert result is not True, (
        "Testcase {} : Failed \n "
        "RP info is unknown after removing static route from c2 \n Error: {}".format(
            tc_name, result
        )
    )

    step("Verify (s,g) populated after adding default route ")

    for data in input_dict_sg:
        result = verify_mroutes(
            tgen,
            data["dut"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            data["iif"],
            data["oil"],
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

        result = verify_upstream_iif(
            tgen, data["dut"], data["iif"], data["src_address"], IGMP_JOIN_RANGE_1
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    step("Verify (*,g) populated after adding default route ")

    for data in input_dict_starg:
        result = verify_mroutes(
            tgen,
            data["dut"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            data["iif"],
            data["oil"],
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

        result = verify_upstream_iif(
            tgen, data["dut"], data["iif"], data["src_address"], IGMP_JOIN_RANGE_1
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    write_test_footer(tc_name)


def test_PIM_hello_tx_rx_p1(request):
    """
    TC_54 Verify received and transmit hello stats
        are getting cleared after PIM nbr reset
    """

    tgen = get_topogen()
    tc_name = request.node.name
    write_test_header(tc_name)

    # Don"t run this test if we have any failure.
    if tgen.routers_have_failure():
        pytest.skip(tgen.errors)

    # Creating configuration from JSON
    app_helper.stop_all_hosts()
    clear_mroute(tgen)
    reset_config_on_routers(tgen)
    clear_pim_interface_traffic(tgen, topo)

    step(
        "Remove c1-c2 connected link to simulate topo "
        "c1(LHR)---l1(RP)----r2---f1-----c2(FHR)"
    )

    intf_c1_c2 = topo["routers"]["c1"]["links"]["c2"]["interface"]
    intf_c2_c1 = topo["routers"]["c2"]["links"]["c1"]["interface"]
    shutdown_bringup_interface(tgen, "c1", intf_c1_c2, False)
    shutdown_bringup_interface(tgen, "c2", intf_c2_c1, False)

    step("Enable the PIM on all the interfaces of FRR1, FRR2, FRR3")
    step(
        "Enable IGMP of FRR1 interface and send IGMP joins "
        " from FRR1 node for group range (225.1.1.1-5)"
    )

    intf_c1_i4 = topo["routers"]["c1"]["links"]["i4"]["interface"]
    input_dict = {
        "c1": {"igmp": {"interfaces": {intf_c1_i4: {"igmp": {"version": "2"}}}}}
    }
    result = create_igmp_config(tgen, topo, input_dict)
    assert result is True, "Testcase {}: Failed Error: {}".format(tc_name, result)

    input_join = {"i4": topo["routers"]["i4"]["links"]["c1"]["interface"]}

    for recvr, recvr_intf in input_join.items():
        result = app_helper.run_join(recvr, IGMP_JOIN_RANGE_1, join_intf=recvr_intf)
        assert result is True, "Testcase {}: Failed Error: {}".format(tc_name, result)

    step("Configure static RP for (225.1.1.1-5) as R2")

    input_dict = {
        "l1": {
            "pim": {
                "rp": [
                    {
                        "rp_addr": topo["routers"]["l1"]["links"]["lo"]["ipv4"].split(
                            "/"
                        )[0],
                        "group_addr_range": GROUP_RANGE,
                    }
                ]
            }
        }
    }

    result = create_pim_config(tgen, topo, input_dict)
    assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    step("Send Mcast traffic from C2 to all the groups ( 225.1.1.1 to 225.1.1.5)")

    input_src = {"i5": topo["routers"]["i5"]["links"]["c2"]["interface"]}

    for src, src_intf in input_src.items():
        result = app_helper.run_traffic(src, IGMP_JOIN_RANGE_1, bind_intf=src_intf)
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    source_i5 = topo["routers"]["i5"]["links"]["c2"]["ipv4"].split("/")[0]

    input_dict_starg = [
        {
            "dut": "c1",
            "src_address": "*",
            "iif": topo["routers"]["c1"]["links"]["l1"]["interface"],
            "oil": topo["routers"]["c1"]["links"]["i4"]["interface"],
        }
    ]

    input_dict_sg = [
        {
            "dut": "c1",
            "src_address": source_i5,
            "iif": topo["routers"]["c1"]["links"]["l1"]["interface"],
            "oil": topo["routers"]["c1"]["links"]["i4"]["interface"],
        }
    ]

    step("(*,G) and (S,G) created on f1 and node verify using 'show ip mroute'")
    for data in input_dict_sg:
        result = verify_mroutes(
            tgen,
            data["dut"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            data["iif"],
            data["oil"],
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    for data in input_dict_starg:
        result = verify_mroutes(
            tgen,
            data["dut"],
            data["src_address"],
            IGMP_JOIN_RANGE_1,
            data["iif"],
            data["oil"],
        )
        assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    intf_l1_c1 = topo["routers"]["l1"]["links"]["c1"]["interface"]
    intf_c1_l1 = topo["routers"]["c1"]["links"]["l1"]["interface"]

    state_dict = {
        "c1": {
            intf_c1_l1: ["helloTx", "helloRx"],
        }
    }

    c1_state_before = get_pim_interface_traffic(tgen, state_dict)
    assert isinstance(
        c1_state_before, dict
    ), "Testcase{} : Failed \n state_before is not dictionary \n Error: {}".format(
        tc_name, result
    )

    step("Flap PIM nbr while doing interface c1-l1 interface shut from f1 side")
    shutdown_bringup_interface(tgen, "c1", intf_c1_l1, False)

    """ Resetting the stats here since shutdown resets the stats.
    """
    reset_stats(c1_state_before)
    shutdown_bringup_interface(tgen, "c1", intf_c1_l1, True)

    step("verify stats after no shutdown on c1 and that they are incremented")

    count = 0
    done = False
    while not done and count <= 7:
        c1_state_after = get_pim_interface_traffic(tgen, state_dict)
        assert isinstance(
            c1_state_after, dict
        ), "Testcase{} : Failed \n state_before is not dictionary \n Error: {}".format(
            tc_name, result
        )

        result = verify_state_incremented(c1_state_before, c1_state_after)
        if result is not True:
            sleep(5)
            count += 1
        else:
            done = True

    assert (
        result is True
    ), "Testcase{} : Failed Error: {}" "stats is not incremented".format(
        tc_name, result
    )

    step("verify before stats on l1")
    l1_state_dict = {
        "l1": {
            intf_l1_c1: ["helloTx", "helloRx"],
        }
    }

    l1_state_before = get_pim_interface_traffic(tgen, l1_state_dict)
    assert isinstance(
        l1_state_before, dict
    ), "Testcase{} : Failed \n state_before is not dictionary \n Error: {}".format(
        tc_name, result
    )

    step("Flap PIM nbr while doing interface r2-c1 shut from r2 side")
    shutdown_bringup_interface(tgen, "l1", intf_l1_c1, False)

    step(
        "After shut the interface from r2 side , verify r2 side rx and tx of hello"
        "counters are resetted show ip pim interface traffic"
    )
    shutdown_bringup_interface(tgen, "l1", intf_l1_c1, True)

    step("verify stats after on l1 are incremented")
    count = 0
    done = False
    while not done and count <= 7:
        l1_state_after = get_pim_interface_traffic(tgen, l1_state_dict)
        assert isinstance(
            l1_state_after, dict
        ), "Testcase{} : Failed \n state_before is not dictionary \n Error: {}".format(
            tc_name, result
        )

        result = verify_state_incremented(l1_state_before, l1_state_after)
        if result is True:
            sleep(5)
            count += 1
        else:
            done = True

    assert (
        result is not True
    ), "Testcase{} : Failed Error: {}" "stats incremented".format(tc_name, result)

    step("Reinit the dict")
    c1_state_before = {}
    l1_state_before = {}
    c1_state_after = {}
    l1_state_after = {}

    step("verify before stats on C1")
    state_dict = {
        "c1": {
            intf_c1_l1: ["helloTx", "helloRx"],
        }
    }

    c1_state_before = get_pim_interface_traffic(tgen, state_dict)
    assert isinstance(
        c1_state_before, dict
    ), "Testcase{} : Failed \n state_before is not dictionary \n Error: {}".format(
        tc_name, result
    )

    step("Flap c1-r2 pim nbr while changing ip address from c1 side")
    c1_l1_ip_subnet = topo["routers"]["c1"]["links"]["l1"]["ipv4"]

    raw_config = {
        "c1": {
            "raw_config": [
                "interface {}".format(intf_c1_l1),
                "no ip address {}".format(c1_l1_ip_subnet),
                "ip address {}".format(NEW_ADDRESS_2_SUBNET),
            ]
        }
    }

    result = apply_raw_config(tgen, raw_config)
    assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result)

    step("verify stats after on c1 are incremented")
    count = 0
    done = False
    while not done and count <= 7:
        c1_state_after = get_pim_interface_traffic(tgen, state_dict)
        assert isinstance(
            c1_state_after, dict
        ), "Testcase{} : Failed \n state_before is not dictionary \n Error: {}".format(
            tc_name, result
        )

        result = verify_state_incremented(c1_state_before, c1_state_after)
        if result is not True:
            sleep(5)
            count += 1
        else:
            done = True

    assert result is True, "Testcase{} : Failed Error: {}" "stats incremented".format(
        tc_name, result
    )

    write_test_footer(tc_name)


if __name__ == "__main__":
    args = ["-s"] + sys.argv[1:]
    sys.exit(pytest.main(args))