tests: ospf_basic_functionality topojson testcases.

1. Adding 18 ospf testcases to topojson.
2. Adding ospf.py library.

Test suite execution time is ~18 minutes.

Signed-off-by: naveen <nguggarigoud@vmware.com>

1 files changed, 1021 insertions, 0 deletions

diff --git a/tests/topotests/ospf_basic_functionality/test_ospf_single_area.py b/tests/topotests/ospf_basic_functionality/test_ospf_single_area.py
new file mode 100644
index 0000000000..87b1b22c0f
--- /dev/null
+++ b/tests/topotests/ospf_basic_functionality/test_ospf_single_area.py
@@ -0,0 +1,1021 @@
+#!/usr/bin/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.
+#
+
+
+"""OSPF Basic Functionality Automation."""
+import os
+import sys
+import time
+import pytest
+import json
+from time import sleep
+from copy import deepcopy
+from ipaddress import IPv4Address
+
+# 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/"))
+
+# pylint: disable=C0413
+# Import topogen and topotest helpers
+from mininet.topo import Topo
+from lib.topogen import Topogen, get_topogen
+import ipaddress
+
+# Import topoJson from lib, to create topology and initial configuration
+from lib.common_config import (
+    start_topology,
+    write_test_header,
+    write_test_footer,
+    reset_config_on_routers,
+    verify_rib,
+    create_static_routes,
+    step,
+    create_route_maps,
+    shutdown_bringup_interface,
+    create_interfaces_cfg,
+)
+from lib.topolog import logger
+from lib.topojson import build_topo_from_json, build_config_from_json
+
+from lib.ospf import (
+    verify_ospf_neighbor,
+    config_ospf_interface,
+    clear_ospf,
+    verify_ospf_rib,
+    create_router_ospf,
+    verify_ospf_interface,
+    verify_ospf_database,
+)
+
+# Global variables
+topo = None
+
+# Reading the data from JSON File for topology creation
+jsonFile = "{}/ospf_single_area.json".format(CWD)
+try:
+    with open(jsonFile, "r") as topoJson:
+        topo = json.load(topoJson)
+except IOError:
+    assert False, "Could not read file {}".format(jsonFile)
+
+"""
+TOPOOLOGY =
+      Please view in a fixed-width font such as Courier.
+      +---+  A1       +---+
+      +R1 +------------+R2 |
+      +-+-+-           +--++
+        |  --        --  |
+        |    -- A0 --    |
+      A0|      ----      |
+        |      ----      | A2
+        |    --    --    |
+        |  --        --  |
+      +-+-+-            +-+-+
+      +R0 +-------------+R3 |
+      +---+     A3     +---+
+
+TESTCASES =
+1. OSPF IFSM -Verify state change events on p2p network.
+2. OSPF Timers - Verify OSPF interface timer hello interval functionality
+3. OSPF Timers - Verify OSPF interface timer dead interval functionality
+4. Verify ospf show commands with json output.
+ """
+
+
+class CreateTopo(Topo):
+    """
+    Test topology builder.
+
+    * `Topo`: Topology object
+    """
+
+    def build(self, *_args, **_opts):
+        """Build function."""
+        tgen = get_topogen(self)
+
+        # Building topology from json file
+        build_topo_from_json(tgen, topo)
+
+
+def setup_module(mod):
+    """
+    Sets up the pytest environment
+
+    * `mod`: module name
+    """
+    global topo
+    testsuite_run_time = time.asctime(time.localtime(time.time()))
+    logger.info("Testsuite start time: {}".format(testsuite_run_time))
+    logger.info("=" * 40)
+
+    logger.info("Running setup_module to create topology")
+
+    # This function initiates the topology build with Topogen...
+    tgen = Topogen(CreateTopo, mod.__name__)
+    # ... and here it calls Mininet initialization functions.
+
+    # Starting topology, create tmp files which are loaded to routers
+    #  to start deamons and then start routers
+    start_topology(tgen)
+
+    # Creating configuration from JSON
+    build_config_from_json(tgen, topo)
+
+    # Don't run this test if we have any failure.
+    if tgen.routers_have_failure():
+        pytest.skip(tgen.errors)
+
+    ospf_covergence = verify_ospf_neighbor(tgen, topo)
+    assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+
+    logger.info("Running setup_module() done")
+
+
+def teardown_module(mod):
+    """
+    Teardown the pytest environment.
+
+    * `mod`: module name
+    """
+
+    logger.info("Running teardown_module to delete topology")
+
+    tgen = get_topogen()
+
+    # Stop toplogy and Remove tmp files
+    tgen.stop_topology()
+
+    logger.info(
+        "Testsuite end time: {}".format(time.asctime(time.localtime(time.time())))
+    )
+    logger.info("=" * 40)
+
+
+# ##################################
+# Test cases start here.
+# ##################################
+
+
+def test_ospf_p2p_tc3_p0(request):
+    """OSPF IFSM -Verify state change events on p2p network."""
+    tc_name = request.node.name
+    write_test_header(tc_name)
+    tgen = get_topogen()
+
+    # Don't run this test if we have any failure.
+    if tgen.routers_have_failure():
+        pytest.skip(tgen.errors)
+
+    global topo
+    step("Bring up the base config as per the topology")
+    reset_config_on_routers(tgen)
+    step(
+        "Verify that OSPF is subscribed to multi cast services "
+        "(All SPF, all DR Routers)."
+    )
+    step("Verify that interface is enabled in ospf.")
+    step("Verify that config is successful.")
+    dut = "r0"
+    input_dict = {
+        "r0": {
+            "links": {
+                "r3": {"ospf": {"mcastMemberOspfAllRouters": True, "ospfEnabled": True}}
+            }
+        }
+    }
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("Delete the ip address")
+    topo1 = {
+        "r0": {
+            "links": {
+                "r3": {
+                    "ipv4": topo["routers"]["r0"]["links"]["r3"]["ipv4"],
+                    "interface": topo["routers"]["r0"]["links"]["r3"]["interface"],
+                    "delete": True,
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("Change the ip on the R0 interface")
+
+    topo_modify_change_ip = deepcopy(topo)
+    intf_ip = topo_modify_change_ip["routers"]["r0"]["links"]["r3"]["ipv4"]
+    topo_modify_change_ip["routers"]["r0"]["links"]["r3"]["ipv4"] = str(
+        IPv4Address(unicode(intf_ip.split("/")[0])) + 3
+    ) + "/{}".format(intf_ip.split("/")[1])
+
+    build_config_from_json(tgen, topo_modify_change_ip, save_bkup=False)
+    step("Verify that interface is enabled in ospf.")
+    dut = "r0"
+    input_dict = {
+        "r0": {
+            "links": {
+                "r3": {
+                    "ospf": {
+                        "ipAddress": topo_modify_change_ip["routers"]["r0"]["links"][
+                            "r3"
+                        ]["ipv4"].split("/")[0],
+                        "ipAddressPrefixlen": int(
+                            topo_modify_change_ip["routers"]["r0"]["links"]["r3"][
+                                "ipv4"
+                            ].split("/")[1]
+                        ),
+                    }
+                }
+            }
+        }
+    }
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("Modify the mask on the R0 interface")
+    ip_addr = topo_modify_change_ip["routers"]["r0"]["links"]["r3"]["ipv4"]
+    mask = topo_modify_change_ip["routers"]["r0"]["links"]["r3"]["ipv4"]
+    step("Delete the ip address")
+    topo1 = {
+        "r0": {
+            "links": {
+                "r3": {
+                    "ipv4": ip_addr,
+                    "interface": topo["routers"]["r0"]["links"]["r3"]["interface"],
+                    "delete": True,
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("Change the ip on the R0 interface")
+
+    topo_modify_change_ip = deepcopy(topo)
+    intf_ip = topo_modify_change_ip["routers"]["r0"]["links"]["r3"]["ipv4"]
+    topo_modify_change_ip["routers"]["r0"]["links"]["r3"]["ipv4"] = str(
+        IPv4Address(unicode(intf_ip.split("/")[0])) + 3
+    ) + "/{}".format(int(intf_ip.split("/")[1]) + 1)
+
+    build_config_from_json(tgen, topo_modify_change_ip, save_bkup=False)
+    step("Verify that interface is enabled in ospf.")
+    dut = "r0"
+    input_dict = {
+        "r0": {
+            "links": {
+                "r3": {
+                    "ospf": {
+                        "ipAddress": topo_modify_change_ip["routers"]["r0"]["links"][
+                            "r3"
+                        ]["ipv4"].split("/")[0],
+                        "ipAddressPrefixlen": int(
+                            topo_modify_change_ip["routers"]["r0"]["links"]["r3"][
+                                "ipv4"
+                            ].split("/")[1]
+                        ),
+                    }
+                }
+            }
+        }
+    }
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    topo1 = {
+        "r0": {
+            "links": {
+                "r3": {
+                    "ipv4": topo_modify_change_ip["routers"]["r0"]["links"]["r3"][
+                        "ipv4"
+                    ],
+                    "interface": topo_modify_change_ip["routers"]["r0"]["links"]["r3"][
+                        "interface"
+                    ],
+                    "delete": True,
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    build_config_from_json(tgen, topo, save_bkup=False)
+
+    step("Change the area id on the interface")
+    input_dict = {
+        "r0": {
+            "links": {
+                "r3": {
+                    "interface": topo["routers"]["r0"]["links"]["r3"]["interface"],
+                    "ospf": {"area": "0.0.0.0"},
+                    "delete": True,
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, input_dict)
+    assert result is True, "Testcase {} :Failed \n Error: {}".format(tc_name, result)
+
+    input_dict = {
+        "r0": {
+            "links": {
+                "r3": {
+                    "interface": topo["routers"]["r0"]["links"]["r3"]["interface"],
+                    "ospf": {"area": "0.0.0.1"},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, input_dict)
+    assert result is True, "Testcase {} :Failed \n Error: {}".format(tc_name, result)
+    step("Verify that interface is enabled in ospf.")
+    dut = "r0"
+    input_dict = {
+        "r0": {"links": {"r3": {"ospf": {"area": "0.0.0.1", "ospfEnabled": True}}}}
+    }
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    input_dict = {
+        "r0": {
+            "links": {
+                "r3": {
+                    "interface": topo["routers"]["r0"]["links"]["r3"]["interface"],
+                    "ospf": {"area": "0.0.0.1"},
+                    "delete": True,
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, input_dict)
+    assert result is True, "Testcase {} :Failed \n Error: {}".format(tc_name, result)
+
+    input_dict = {
+        "r0": {
+            "links": {
+                "r3": {
+                    "interface": topo["routers"]["r0"]["links"]["r3"]["interface"],
+                    "ospf": {"area": "0.0.0.0"},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, input_dict)
+    assert result is True, "Testcase {} :Failed \n Error: {}".format(tc_name, result)
+
+    # Api call verify whether BGP is converged
+    ospf_covergence = verify_ospf_neighbor(tgen, topo)
+    assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+
+    write_test_footer(tc_name)
+
+
+def test_ospf_hello_tc10_p0(request):
+    """
+    OSPF timers.
+
+    Verify OSPF interface timer hello interval functionality
+    """
+    tc_name = request.node.name
+    write_test_header(tc_name)
+    tgen = get_topogen()
+
+    # Don't run this test if we have any failure.
+    if tgen.routers_have_failure():
+        pytest.skip(tgen.errors)
+
+    global topo
+    step("Bring up the base config as per the topology")
+    reset_config_on_routers(tgen)
+
+    step("modify hello timer from default value to some other value on r1")
+
+    topo1 = {
+        "r1": {
+            "links": {
+                "r0": {
+                    "interface": topo["routers"]["r1"]["links"]["r0"]["interface"],
+                    "ospf": {"hello_interval": 11, "dead_interval": 12},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step(
+        "verify that new timer value is configured and applied using "
+        "the show ip ospf interface command."
+    )
+    dut = "r1"
+    input_dict = {
+        "r1": {
+            "links": {"r0": {"ospf": {"timerMsecs": 11 * 1000, "timerDeadSecs": 12}}}
+        }
+    }
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    # sleep for 20 secs for hello timer expiry
+    sleep(20)
+
+    step("verify that ospf neighbours are not full - hello timer mis match.")
+    dut = "r1"
+    ospf_covergence = verify_ospf_neighbor(
+        tgen, topo, dut=dut, expected=False, attempts=10
+    )
+    assert ospf_covergence is not True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+
+    step("modify hello timer from default value to r1 hello timer on r2")
+
+    topo1 = {
+        "r0": {
+            "links": {
+                "r1": {
+                    "interface": topo["routers"]["r0"]["links"]["r1"]["interface"],
+                    "ospf": {"hello_interval": 11, "dead_interval": 12},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that new timer value is configured.")
+    input_dict = {
+        "r0": {
+            "links": {"r1": {"ospf": {"timerMsecs": 11 * 1000, "timerDeadSecs": 12}}}
+        }
+    }
+    dut = "r0"
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that ospf neighbours are  full")
+    ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut)
+    assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+
+    step("reconfigure the default hello timer value to default on r1 and r2")
+
+    topo1 = {
+        "r0": {
+            "links": {
+                "r1": {
+                    "interface": topo["routers"]["r0"]["links"]["r1"]["interface"],
+                    "ospf": {"hello_interval": 10, "dead_interval": 40},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    topo1 = {
+        "r1": {
+            "links": {
+                "r0": {
+                    "interface": topo["routers"]["r1"]["links"]["r0"]["interface"],
+                    "ospf": {"hello_interval": 10, "dead_interval": 40},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that new timer value is configured.")
+    input_dict = {
+        "r0": {
+            "links": {"r1": {"ospf": {"timerMsecs": 10 * 1000, "timerDeadSecs": 40}}}
+        }
+    }
+    dut = "r0"
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that ospf neighbours are  full")
+    ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut)
+    assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+
+    step("reconfigure the default hello timer value to default on r1 and r2")
+
+    topo1 = {
+        "r0": {
+            "links": {
+                "r1": {
+                    "interface": topo["routers"]["r0"]["links"]["r1"]["interface"],
+                    "ospf": {"hello_interval": 10, "dead_interval": 40},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    topo1 = {
+        "r1": {
+            "links": {
+                "r0": {
+                    "interface": topo["routers"]["r1"]["links"]["r0"]["interface"],
+                    "ospf": {"hello_interval": 10, "dead_interval": 40},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that new timer value is configured.")
+    input_dict = {
+        "r0": {
+            "links": {"r1": {"ospf": {"timerMsecs": 10 * 1000, "timerDeadSecs": 40}}}
+        }
+    }
+    dut = "r0"
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that ospf neighbours are  full")
+    ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut)
+    assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+
+    step("configure hello timer = 1 on r1 and r2")
+    topo1 = {
+        "r0": {
+            "links": {
+                "r1": {
+                    "interface": topo["routers"]["r0"]["links"]["r1"]["interface"],
+                    "ospf": {"hello_interval": 1, "dead_interval": 4},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    topo1 = {
+        "r1": {
+            "links": {
+                "r0": {
+                    "interface": topo["routers"]["r1"]["links"]["r0"]["interface"],
+                    "ospf": {"hello_interval": 1, "dead_interval": 4},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that new timer value is configured.")
+    input_dict = {
+        "r0": {"links": {"r1": {"ospf": {"timerMsecs": 1 * 1000, "timerDeadSecs": 4}}}}
+    }
+    dut = "r0"
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that ospf neighbours are  full")
+    ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut)
+    assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+
+    step(" Configure hello timer = 65535")
+    topo1 = {
+        "r0": {
+            "links": {
+                "r1": {
+                    "interface": topo["routers"]["r0"]["links"]["r1"]["interface"],
+                    "ospf": {"hello_interval": 65535, "dead_interval": 4},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    topo1 = {
+        "r1": {
+            "links": {
+                "r0": {
+                    "interface": topo["routers"]["r1"]["links"]["r0"]["interface"],
+                    "ospf": {"hello_interval": 65535, "dead_interval": 4},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that new timer value is configured.")
+    input_dict = {
+        "r0": {
+            "links": {"r1": {"ospf": {"timerMsecs": 65535 * 1000, "timerDeadSecs": 4}}}
+        }
+    }
+    dut = "r0"
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that ospf neighbours are  full")
+    ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut)
+    assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+
+    step(" Try configuring timer values outside range for example 65536")
+    topo1 = {
+        "r0": {
+            "links": {
+                "r1": {
+                    "interface": topo["routers"]["r0"]["links"]["r1"]["interface"],
+                    "ospf": {"hello_interval": 65536, "dead_interval": 4},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is not True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result
+    )
+
+    step("Unconfigure the hello timer from the interface from r1 and r2.")
+
+    topo1 = {
+        "r1": {
+            "links": {
+                "r0": {
+                    "interface": topo["routers"]["r1"]["links"]["r0"]["interface"],
+                    "ospf": {"hello_interval": 65535},
+                    "delete": True,
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step(
+        "Verify that timer value is deleted from intf & " "set to default value 40 sec."
+    )
+    input_dict = {"r1": {"links": {"r0": {"ospf": {"timerMsecs": 10 * 1000}}}}}
+    dut = "r1"
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    write_test_footer(tc_name)
+
+
+def test_ospf_dead_tc11_p0(request):
+    """
+    OSPF timers.
+
+    Verify OSPF interface timer dead interval functionality
+    """
+    tc_name = request.node.name
+    write_test_header(tc_name)
+    tgen = get_topogen()
+
+    # Don't run this test if we have any failure.
+    if tgen.routers_have_failure():
+        pytest.skip(tgen.errors)
+
+    global topo
+    step("Bring up the base config as per the topology")
+    reset_config_on_routers(tgen)
+
+    step("modify dead interval from default value to some other value on r1")
+
+    topo1 = {
+        "r1": {
+            "links": {
+                "r0": {
+                    "interface": topo["routers"]["r1"]["links"]["r0"]["interface"],
+                    "ospf": {"hello_interval": 12, "dead_interval": 48},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step(
+        "verify that new timer value is configured and applied using "
+        "the show ip ospf interface command."
+    )
+    dut = "r1"
+    input_dict = {"r1": {"links": {"r0": {"ospf": {"timerDeadSecs": 48}}}}}
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    sleep(50)
+    step("verify that ospf neighbours are not full - dead timer mis match.")
+    dut = "r1"
+    ospf_covergence = verify_ospf_neighbor(
+        tgen, topo, dut=dut, expected=False, attempts=10
+    )
+    assert ospf_covergence is not True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+
+    step("modify dead interval from default value to r1" "dead interval timer on r2")
+
+    topo1 = {
+        "r0": {
+            "links": {
+                "r1": {
+                    "interface": topo["routers"]["r0"]["links"]["r1"]["interface"],
+                    "ospf": {"dead_interval": 48, "hello_interval": 12},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that new timer value is configured.")
+    input_dict = {"r0": {"links": {"r1": {"ospf": {"timerDeadSecs": 48}}}}}
+    dut = "r0"
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that ospf neighbours are  full")
+    ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut)
+    assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+
+    step("remove ospf on R1")
+    ospf_del = {"r0": {"ospf": {"delete": True}}}
+    result = create_router_ospf(tgen, topo, ospf_del)
+    assert result is True, "Testcase : Failed \n Error: {}".format(result)
+
+    step("verify that on R2 ospf neighbour is full till dead time expiry.")
+    dut = "r1"
+    ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut)
+    assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+    sleep(50)
+
+    step("Verify that nbr on r2 gets deleted after dead interval expiry.")
+    ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut)
+    assert ospf_covergence is not True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+
+    # reconfiguring deleted ospf process by resetting the configs.
+    reset_config_on_routers(tgen)
+
+    step("reconfigure the default dead interval timer value to " "default on r1 and r2")
+    topo1 = {
+        "r0": {
+            "links": {
+                "r1": {
+                    "interface": topo["routers"]["r0"]["links"]["r1"]["interface"],
+                    "ospf": {"dead_interval": 40},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    topo1 = {
+        "r1": {
+            "links": {
+                "r0": {
+                    "interface": topo["routers"]["r1"]["links"]["r0"]["interface"],
+                    "ospf": {"dead_interval": 40},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that new timer value is configured.")
+    input_dict = {"r0": {"links": {"r1": {"ospf": {"timerDeadSecs": 40}}}}}
+    dut = "r0"
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that ospf neighbours are  full")
+    ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut)
+    assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+
+    step(" Configure dead timer = 65535 on r1 and r2")
+
+    topo1 = {
+        "r0": {
+            "links": {
+                "r1": {
+                    "interface": topo["routers"]["r0"]["links"]["r1"]["interface"],
+                    "ospf": {"dead_interval": 65535},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    topo1 = {
+        "r1": {
+            "links": {
+                "r0": {
+                    "interface": topo["routers"]["r1"]["links"]["r0"]["interface"],
+                    "ospf": {"dead_interval": 65535},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that new timer value is configured.")
+    input_dict = {"r0": {"links": {"r1": {"ospf": {"timerDeadSecs": 65535}}}}}
+    dut = "r0"
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step("verify that ospf neighbours are  full")
+    ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut)
+    assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+
+    step(" Try configuring timer values outside range for example 65536")
+    topo1 = {
+        "r0": {
+            "links": {
+                "r1": {
+                    "interface": topo["routers"]["r0"]["links"]["r1"]["interface"],
+                    "ospf": {"dead_interval": 65536},
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is not True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result
+    )
+
+    step("Unconfigure the dead timer from the interface from r1 and r2.")
+
+    topo1 = {
+        "r1": {
+            "links": {
+                "r0": {
+                    "interface": topo["routers"]["r1"]["links"]["r0"]["interface"],
+                    "ospf": {"dead_interval": 65535},
+                    "delete": True,
+                }
+            }
+        }
+    }
+
+    result = create_interfaces_cfg(tgen, topo1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    step(
+        "Verify that timer value is deleted from intf & " "set to default value 40 sec."
+    )
+    input_dict = {"r1": {"links": {"r0": {"ospf": {"timerDeadSecs": 40}}}}}
+    dut = "r1"
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    write_test_footer(tc_name)
+
+
+def test_ospf_show_p1(request):
+    """Verify ospf show commands with json output."""
+    tc_name = request.node.name
+    write_test_header(tc_name)
+    tgen = get_topogen()
+
+    # Don't run this test if we have any failure.
+    if tgen.routers_have_failure():
+        pytest.skip(tgen.errors)
+
+    global topo
+    step(" Bring up the base config as per the topology")
+    reset_config_on_routers(tgen)
+
+    ospf_covergence = verify_ospf_neighbor(tgen, topo)
+    assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
+        ospf_covergence
+    )
+    dut = "r1"
+    input_dict = {
+        "r1": {
+            "links": {
+                "r0": {
+                    "ospf": {
+                        "ifUp": True,
+                        "ifFlags": "<UP,BROADCAST,RUNNING,MULTICAST>",
+                        "ospfEnabled": True,
+                        "ipAddressPrefixlen": 24,
+                        "ospfIfType": "Broadcast",
+                        "area": "0.0.0.0",
+                        "networkType": "BROADCAST",
+                        "cost": 10,
+                        "transmitDelaySecs": 1,
+                        "state": "DR",
+                        "priority": 1,
+                        "mcastMemberOspfAllRouters": True,
+                        "timerMsecs": 1000,
+                        "timerDeadSecs": 4,
+                        "timerWaitSecs": 4,
+                        "timerRetransmitSecs": 5,
+                        "nbrCount": 1,
+                        "nbrAdjacentCount": 1,
+                    }
+                }
+            }
+        }
+    }
+    result = verify_ospf_interface(tgen, topo, dut=dut, input_dict=input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    # show ip ospf route
+    ip = topo["routers"]["r0"]["links"]["r3"]["ipv4"]
+    ip_net = str(ipaddress.ip_interface(u"{}".format(ip)).network)
+    nh = topo["routers"]["r0"]["links"]["r1"]["ipv4"].split("/")[0]
+    input_dict = {
+        "r1": {"static_routes": [{"network": ip_net, "no_of_ip": 1, "routeType": "N"}]}
+    }
+
+    dut = "r1"
+    result = verify_ospf_rib(tgen, dut, input_dict, next_hop=nh)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
+
+    write_test_footer(tc_name)
+
+
+if __name__ == "__main__":
+    args = ["-s"] + sys.argv[1:]
+    sys.exit(pytest.main(args))