tests: Adding bgp tests for prefix-lists

Signed-off-by: Ashish Pant <ashish12pant@gmail.com>

Adds mulitple test scenarios for prefix-lists in bgp. Verfication
API for prefix-lits

Also adds description for bgp-basic test suite

5 files changed, 1634 insertions, 0 deletions

diff --git a/tests/topotests/bgp-basic-functionality-topo1/test_bgp_basic_functionality.py b/tests/topotests/bgp-basic-functionality-topo1/test_bgp_basic_functionality.py
index 1d6ea0cda..fd2102dd7 100755
--- a/tests/topotests/bgp-basic-functionality-topo1/test_bgp_basic_functionality.py
+++ b/tests/topotests/bgp-basic-functionality-topo1/test_bgp_basic_functionality.py
@@ -30,6 +30,13 @@ Test steps
 - Bring up topology
 - Verify for bgp to converge
 - Modify/Delete and verify router-id
+- Modify and verify bgp timers
+- Create and verify static routes
+- Modify and verify admin distance for existing static routes
+- Test advertise network using network command
+- Verify clear bgp
+- Test bgp convergence with loopback interface
+- Test advertise network using network command
 """
 
 import os
diff --git a/tests/topotests/bgp-prefix-list-topo1/__init__.py b/tests/topotests/bgp-prefix-list-topo1/__init__.py
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tests/topotests/bgp-prefix-list-topo1/__init__.py
diff --git a/tests/topotests/bgp-prefix-list-topo1/prefix_lists.json b/tests/topotests/bgp-prefix-list-topo1/prefix_lists.json
new file mode 100644
index 000000000..3bb07ad99
--- /dev/null
+++ b/tests/topotests/bgp-prefix-list-topo1/prefix_lists.json
@@ -0,0 +1,123 @@
+{
+   "address_types": ["ipv4"],
+   "ipv4base":"10.0.0.0",
+   "ipv4mask":30,
+   "ipv6base":"fd00::",
+   "ipv6mask":64,
+   "link_ip_start":{"ipv4":"10.0.0.0", "v4mask":30, "ipv6":"fd00::", "v6mask":64},
+   "lo_prefix":{"ipv4":"1.0.", "v4mask":32, "ipv6":"2001:DB8:F::", "v6mask":128},
+   "routers":{
+      "r1":{
+         "links":{
+            "lo": {"ipv4": "auto", "ipv6": "auto", "type": "loopback", "add_static_route":"yes"},
+            "r2":{"ipv4":"auto", "ipv6":"auto"},
+            "r3":{"ipv4":"auto", "ipv6":"auto"}
+         },
+         "bgp":{
+            "local_as":"100",
+            "address_family": {
+               "ipv4": {
+                  "unicast": {
+                     "neighbor": {
+                        "r2": {
+                           "dest_link": {
+                              "r1": {}
+                           }
+                        },
+                        "r3": {
+                           "dest_link": {
+                              "r1": {}
+                           }
+                        }
+                     }
+                  }
+               }
+            }
+         }
+      },
+      "r2":{
+         "links":{
+            "lo": {"ipv4": "auto", "ipv6": "auto", "type": "loopback", "add_static_route":"yes"},
+            "r1":{"ipv4":"auto", "ipv6":"auto"},
+            "r3":{"ipv4":"auto", "ipv6":"auto"}
+         },
+         "bgp":{
+            "local_as":"100",
+            "address_family": {
+               "ipv4": {
+                  "unicast": {
+                     "neighbor": {
+                        "r1": {
+                           "dest_link": {
+                              "r2": {}
+                           }
+                        },
+                        "r3": {
+                           "dest_link": {
+                              "r2": {}
+                           }
+                        }
+                     }
+                  }
+               }
+            }
+         }
+      },
+      "r3":{
+         "links":{
+            "lo": {"ipv4": "auto", "ipv6": "auto", "type": "loopback", "add_static_route":"yes"},
+            "r1":{"ipv4":"auto", "ipv6":"auto"},
+            "r2":{"ipv4":"auto", "ipv6":"auto"},
+            "r4":{"ipv4":"auto", "ipv6":"auto"}
+         },
+         "bgp":{
+            "local_as":"100",
+            "address_family": {
+               "ipv4": {
+                  "unicast": {
+                     "neighbor": {
+                        "r1": {
+                           "dest_link": {
+                              "r3": {}
+                           }
+                        },
+                        "r2": {
+                           "dest_link": {
+                              "r3": {}
+                           }
+                        },
+                        "r4": {
+                           "dest_link": {
+                              "r3": {}
+                           }
+                        }
+                     }
+                  }
+               }
+            }
+         }
+      },
+      "r4":{
+         "links":{
+            "lo": {"ipv4": "auto", "ipv6": "auto", "type": "loopback", "add_static_route":"yes"},
+            "r3":{"ipv4":"auto", "ipv6":"auto"}
+         },
+         "bgp":{
+            "local_as":"200",
+            "address_family": {
+               "ipv4": {
+                  "unicast": {
+                     "neighbor": {
+                        "r3": {
+                           "dest_link": {
+                              "r4": {}
+                           }
+                        }
+                     }
+                  }
+               }
+            }
+         }
+      }
+   }
+}
diff --git a/tests/topotests/bgp-prefix-list-topo1/test_prefix_lists.py b/tests/topotests/bgp-prefix-list-topo1/test_prefix_lists.py
new file mode 100755
index 000000000..f77fea770
--- /dev/null
+++ b/tests/topotests/bgp-prefix-list-topo1/test_prefix_lists.py
@@ -0,0 +1,1450 @@
+#!/usr/bin/python
+
+#
+# Copyright (c) 2019 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 prefix-list functionality:
+
+Test steps
+- Create topology (setup module)
+  Creating 4 routers topology, r1, r2, r3 are in IBGP and
+  r3, r4 are in EBGP
+- Bring up topology
+- Verify for bgp to converge
+
+IP prefix-list tests
+- Test ip prefix-lists IN permit
+- Test ip prefix-lists OUT permit
+- Test ip prefix-lists IN deny and permit any
+- Test delete ip prefix-lists
+- Test ip prefix-lists OUT deny and permit any
+- Test modify ip prefix-lists IN permit to deny
+- Test modify ip prefix-lists IN deny to permit
+- Test modify ip prefix-lists OUT permit to deny
+- Test modify prefix-lists OUT deny to permit
+- Test ip prefix-lists implicit deny
+"""
+
+import sys
+import json
+import time
+import os
+import pytest
+
+# 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 mininet.topo import Topo
+from lib.topogen import Topogen, get_topogen
+
+# Import topoJson from lib, to create topology and initial configuration
+from lib.common_config import (
+    start_topology, stop_topology, write_test_header,
+    write_test_footer, reset_config_on_routers,
+    verify_rib, create_static_routes,
+    create_prefix_lists, verify_prefix_lists
+)
+from lib.topolog import logger
+from lib.bgp import (
+    verify_bgp_convergence, create_router_bgp,
+    clear_bgp_and_verify
+)
+from lib.topojson import build_topo_from_json, build_config_from_json
+
+# Reading the data from JSON File for topology creation
+jsonFile = "{}/prefix_lists.json".format(CWD)
+
+try:
+    with open(jsonFile, "r") as topoJson:
+        topo = json.load(topoJson)
+except IOError:
+    assert False, "Could not read file {}".format(jsonFile)
+
+# Global variables
+bgp_convergence = False
+
+
+class BGPPrefixListTopo(Topo):
+    """
+    Test BGPPrefixListTopo - topology 1
+
+    * `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
+    """
+
+    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(BGPPrefixListTopo, 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)
+
+    # Checking BGP convergence
+    global BGP_CONVERGENCE
+
+    # Don't run this test if we have any failure.
+    if tgen.routers_have_failure():
+        pytest.skip(tgen.errors)
+
+    # Api call verify whether BGP is converged
+    BGP_CONVERGENCE = verify_bgp_convergence(tgen, topo)
+    assert BGP_CONVERGENCE is True, ("setup_module :Failed \n Error:"
+                                     " {}".format(BGP_CONVERGENCE))
+
+    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
+    stop_topology(tgen)
+
+    logger.info("Testsuite end time: {}".
+                format(time.asctime(time.localtime(time.time()))))
+    logger.info("="*40)
+
+#####################################################
+#
+#   Tests starting
+#
+#####################################################
+
+
+def test_ip_prefix_lists_in_permit(request):
+    """
+    Create ip prefix list and test permit prefixes IN direction
+    """
+
+    tgen = get_topogen()
+    if BGP_CONVERGENCE is not True:
+        pytest.skip("skipped because of BGP Convergence failure")
+
+    # test case name
+    tc_name = request.node.name
+    write_test_header(tc_name)
+
+    # Create Static routes
+    input_dict = {
+        "r1": {
+            "static_routes": [{
+                "network": "20.0.20.1/32",
+                "no_of_ip": 1,
+                "next_hop": "10.0.0.2"
+            }]
+        }
+    }
+    result = create_static_routes(tgen, input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Create ip prefix list
+    input_dict_2 = {
+        "r3": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [{
+                        "seqid": 10,
+                        "network": "any",
+                        "action": "permit"
+                    }]
+                }
+            }
+        }
+    }
+    result = create_prefix_lists(tgen, input_dict_2)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Configure bgp neighbor with prefix list
+    input_dict_3 = {
+        "r1": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "redistribute": [
+                                {"redist_type": "static"},
+                                {"redist_type": "connected"}
+                            ]
+                        }
+                    }
+                }
+            }
+        },
+        "r3": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "neighbor": {
+                                "r1": {
+                                    "dest_link": {
+                                        "r3": {
+                                            "prefix_lists": [
+                                                {
+                                                    "name": "pf_list_1",
+                                                    "direction": "in"
+                                                }
+                                            ]
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    result = create_router_bgp(tgen, topo, input_dict_3)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r3"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    write_test_footer(tc_name)
+
+
+def test_ip_prefix_lists_out_permit(request):
+    """
+    Create ip prefix list and test permit prefixes out direction
+    """
+
+    tgen = get_topogen()
+    if BGP_CONVERGENCE is not True:
+        pytest.skip("skipped because of BGP Convergence failure")
+
+    # test case name
+    tc_name = request.node.name
+    write_test_header(tc_name)
+
+    # Creating configuration from JSON
+    reset_config_on_routers(tgen)
+
+    # Create Static routes
+    input_dict = {
+        "r1": {
+            "static_routes": [{
+                "network": "10.0.20.1/32",
+                "no_of_ip": 1,
+                "next_hop": "10.0.0.2"
+            }]
+        }
+    }
+    result = create_static_routes(tgen, input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Create Static routes
+    input_dict_1 = {
+        "r1": {
+            "static_routes": [{
+                "network": "20.0.20.1/32",
+                "no_of_ip": 1,
+                "next_hop": "10.0.0.2"
+            }]
+        }
+    }
+    result = create_static_routes(tgen, input_dict_1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    input_dict_5 = {
+        "r3": {
+            "static_routes": [{
+                "network": "10.0.0.2/30",
+                "no_of_ip": 1,
+                "next_hop": "10.0.0.9"
+            }]
+        }
+    }
+    result = create_static_routes(tgen, input_dict_5)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Api call to redistribute static routes
+
+    # Create ip prefix list
+    input_dict_2 = {
+        "r1": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [{
+                        "seqid": 10,
+                        "network": "20.0.20.1/32",
+                        "action": "permit"
+                    }]
+                }
+            }
+        }
+    }
+    result = create_prefix_lists(tgen, input_dict_2)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Configure prefix list to bgp neighbor
+    # Configure bgp neighbor with prefix list
+    input_dict_3 = {
+        "r1": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "neighbor": {
+                                "r3": {
+                                    "dest_link": {
+                                        "r1": {
+                                            "prefix_lists": [
+                                                {
+                                                    "name": "pf_list_1",
+                                                    "direction": "out"
+                                                }
+                                            ]
+                                        }
+                                    }
+                                }
+                            },
+                            "redistribute": [
+                                {"redist_type": "static"},
+                                {"redist_type": "connected"}
+                            ]
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    result = create_router_bgp(tgen, topo, input_dict_3)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r3"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict_1, protocol=protocol)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol)
+    assert result is not True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+    write_test_footer(tc_name)
+
+
+def test_ip_prefix_lists_in_deny_and_permit_any(request):
+    """
+    Create ip prefix list and test permit/deny prefixes IN direction
+    """
+
+    tgen = get_topogen()
+    if BGP_CONVERGENCE is not True:
+        pytest.skip("skipped because of BGP Convergence failure")
+
+    # test case name
+    tc_name = request.node.name
+    write_test_header(tc_name)
+
+    # Creating configuration from JSON
+    reset_config_on_routers(tgen)
+
+    # Create Static Routes
+    input_dict = {
+        "r1": {
+            "static_routes": [{
+                "network": "10.0.20.1/32",
+                "no_of_ip": 1,
+                "next_hop": "10.0.0.2"
+            }]
+        }
+    }
+    result = create_static_routes(tgen, input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Api call to redistribute static routes
+    # Create ip prefix list
+    input_dict_2 = {
+        "r1": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [
+                        {
+                            "seqid": "10",
+                            "network": "10.0.20.1/32",
+                            "action": "deny"
+                        },
+                        {
+                            "seqid": "11",
+                            "network": "any",
+                            "action": "permit"
+                        }
+                    ]
+                }
+            }
+        }
+    }
+    result = create_prefix_lists(tgen, input_dict_2)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Configure bgp neighbor with prefix list
+    input_dict_3 = {
+        "r1": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "redistribute": [
+                                {"redist_type": "static"},
+                                {"redist_type": "connected"}
+                            ]
+                        }
+                    }
+                }
+            }
+        },
+        "r3": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "neighbor": {
+                                "r1": {
+                                    "dest_link": {
+                                        "r3": {
+                                            "prefix_lists": [
+                                                {
+                                                    "name": "pf_list_1",
+                                                    "direction": "in"
+                                                }
+                                            ]
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    # Configure prefix list to bgp neighbor
+    result = create_router_bgp(tgen, topo, input_dict_3)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r3"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol)
+    assert result is not True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    write_test_footer(tc_name)
+
+
+def test_delete_prefix_lists(request):
+    """
+    Delete ip prefix list
+    """
+
+    tgen = get_topogen()
+    if BGP_CONVERGENCE is not True:
+        pytest.skip("skipped because of BGP Convergence failure")
+
+    # test case name
+    tc_name = request.node.name
+    write_test_header(tc_name)
+
+    # Creating configuration from JSON
+    reset_config_on_routers(tgen)
+
+    # Create ip prefix list
+    input_dict_2 = {
+        "r1": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [
+                        {
+                            "seqid": "10",
+                            "network": "10.0.20.1/32",
+                            "action": "deny"
+                        }
+                    ]
+                }
+            }
+        }
+    }
+    result = create_prefix_lists(tgen, input_dict_2)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    result = verify_prefix_lists(tgen, input_dict_2)
+    assert result is not True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+    logger.info(result)
+
+    # Delete prefix list
+    input_dict_2 = {
+        "r1": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [
+                        {
+                            "seqid": "10",
+                            "network": "10.0.20.1/32",
+                            "action": "deny",
+                            "delete": True
+                        }
+                    ]
+                }
+            }
+        }
+    }
+    result = create_prefix_lists(tgen, input_dict_2)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    result = verify_prefix_lists(tgen, input_dict_2)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    write_test_footer(tc_name)
+
+
+def test_ip_prefix_lists_out_deny_and_permit_any(request):
+    """
+    Create ip prefix list and test deny/permit any prefixes OUT direction
+    """
+
+    tgen = get_topogen()
+    if BGP_CONVERGENCE is not True:
+        pytest.skip("skipped because of BGP Convergence failure")
+
+    # test case name
+    tc_name = request.node.name
+    write_test_header(tc_name)
+
+    # Creating configuration from JSON
+    reset_config_on_routers(tgen)
+
+    # Create Static Routes
+    input_dict = {
+        "r1": {
+            "static_routes": [{
+                "network": "10.0.20.1/32",
+                "no_of_ip": 9,
+                "next_hop": "10.0.0.2"
+            }]
+        }
+    }
+    result = create_static_routes(tgen, input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Create Static Routes
+    input_dict_1 = {
+        "r2": {
+            "static_routes": [{
+                "network": "20.0.20.1/32",
+                "no_of_ip": 9,
+                "next_hop": "10.0.0.1"
+            }]
+        }
+    }
+    result = create_static_routes(tgen, input_dict_1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Api call to redistribute static routes
+
+    # Create ip prefix list
+    input_dict_3 = {
+        "r3": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [
+                        {
+                            "seqid": "10",
+                            "network": "10.0.0.0/8",
+                            "le": "32",
+                            "action": "deny"
+                        },
+                        {
+                            "seqid": "11",
+                            "network": "any",
+                            "action": "permit"
+                        }
+                    ]
+                }
+            }
+        }
+    }
+    result = create_prefix_lists(tgen, input_dict_3)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Configure prefix list to bgp neighbor
+    input_dict_4 = {
+        "r1": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "redistribute": [
+                                {"redist_type": "static"},
+                                {"redist_type": "connected"}
+                            ]
+                        }
+                    }
+                }
+            }
+        },
+        "r2": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "redistribute": [
+                                {"redist_type": "static"},
+                                {"redist_type": "connected"}
+                            ]
+                        }
+                    }
+                }
+            }
+        },
+        "r3": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "neighbor": {
+                                "r4": {
+                                    "dest_link": {
+                                        "r3": {
+                                            "prefix_lists": [
+                                                {
+                                                    "name": "pf_list_1",
+                                                    "direction": "out"
+                                                }
+                                            ]
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    result = create_router_bgp(tgen, topo, input_dict_4)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r4"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict_1, protocol=protocol)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r4"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol)
+    assert result is not True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    write_test_footer(tc_name)
+
+
+def test_modify_prefix_lists_in_permit_to_deny(request):
+    """
+    Modify ip prefix list and test permit to deny prefixes IN direction
+    """
+
+    tgen = get_topogen()
+    if BGP_CONVERGENCE is not True:
+        pytest.skip("skipped because of BGP Convergence failure")
+
+    # test case name
+    tc_name = request.node.name
+    write_test_header(tc_name)
+
+    # Creating configuration from JSON
+    reset_config_on_routers(tgen)
+
+    # Create Static Routes
+    input_dict = {
+        "r1": {
+            "static_routes": [{
+                "network": "10.0.20.1/32",
+                "no_of_ip": 9,
+                "next_hop": "10.0.0.2"
+            }]
+        }
+    }
+    result = create_static_routes(tgen, input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Api call to redistribute static routes
+
+    # Create ip prefix list
+    input_dict_2 = {
+        "r3": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [{
+                        "seqid": "10",
+                        "network": "10.0.0.0/8",
+                        "le": "32",
+                        "action": "permit"
+                    }]
+                }
+            }
+        }
+    }
+    result = create_prefix_lists(tgen, input_dict_2)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Configure prefix list to bgp neighbor
+    input_dict_3 = {
+        "r1": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "redistribute": [
+                                {"redist_type": "static"},
+                                {"redist_type": "connected"}
+                            ]
+                        }
+                    }
+                }
+            }
+        },
+        "r3": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "neighbor": {
+                                "r1": {
+                                    "dest_link":{
+                                        "r3": {
+                                            "prefix_lists": [
+                                                {
+                                                    "name": "pf_list_1",
+                                                    "direction": "in"
+                                                }
+                                            ]
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    result = create_router_bgp(tgen, topo, input_dict_3)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r3"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Modify prefix list
+    input_dict_1 = {
+        "r3": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [
+                        {
+                            "seqid": "10",
+                            "network": "10.0.0.0/8",
+                            "le": "32",
+                            "action": "deny"
+                        },
+                        {
+                            "seqid": "11",
+                            "network": "any",
+                            "action": "permit"
+                        }
+                    ]
+                }
+            }
+        }
+    }
+    result = create_prefix_lists(tgen, input_dict_1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Api call to clear bgp, so config changes would be reflected
+    dut = "r3"
+    result = clear_bgp_and_verify(tgen, topo, dut)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r3"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol)
+    assert result is not True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    write_test_footer(tc_name)
+
+
+def test_modify_prefix_lists_in_deny_to_permit(request):
+    """
+    Modify ip prefix list and test deny to permit prefixes IN direction
+    """
+
+    tgen = get_topogen()
+    if BGP_CONVERGENCE is not True:
+        pytest.skip("skipped because of BGP Convergence failure")
+
+    # test case name
+    tc_name = request.node.name
+    write_test_header(tc_name)
+
+    # Creating configuration from JSON
+    reset_config_on_routers(tgen)
+
+    # Create Static Routes
+    input_dict = {
+        "r1": {
+            "static_routes": [{
+                "network": "10.0.20.1/32",
+                "no_of_ip": 9,
+                "next_hop": "10.0.0.2"
+            }]
+        }
+    }
+    result = create_static_routes(tgen, input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Api call to redistribute static routes
+
+    # Create ip prefix list
+    input_dict_1 = {
+        "r3": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [
+                        {
+                            "seqid": "10",
+                            "network": "10.0.0.0/8",
+                            "le": "32",
+                            "action": "deny"
+                        },
+                        {
+                            "seqid": "11",
+                            "network": "any",
+                            "action": "permit"
+                        }
+                    ]
+                }
+            }
+        }
+    }
+    result = create_prefix_lists(tgen, input_dict_1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Configure prefix list to bgp neighbor
+    input_dict_2 = {
+        "r1": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "redistribute": [
+                                {"redist_type": "static"},
+                                {"redist_type": "connected"}
+                            ]
+                        }
+                    }
+                }
+            }
+        },
+        "r3": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "neighbor": {
+                                "r1": {
+                                    "dest_link": {
+                                        "r3": {
+                                            "prefix_lists": [
+                                                {
+                                                    "name": "pf_list_1",
+                                                    "direction": "in"
+                                                }
+                                            ]
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    result = create_router_bgp(tgen, topo, input_dict_2)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r3"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol)
+    assert result is not True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Modify  ip prefix list
+    input_dict_1 = {
+        "r3": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [{
+                        "seqid": "10",
+                        "network": "10.0.0.0/8",
+                        "le": "32",
+                        "action": "permit"
+                    }]
+                }
+            }
+        }
+
+    }
+    result = create_prefix_lists(tgen, input_dict_1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Api call to clear bgp, so config changes would be reflected
+    dut = "r3"
+    result = clear_bgp_and_verify(tgen, topo, dut)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r3"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    write_test_footer(tc_name)
+
+
+def test_modify_prefix_lists_out_permit_to_deny(request):
+    """
+    Modify ip prefix list and test permit to deny prefixes OUT direction
+    """
+
+    tgen = get_topogen()
+    if BGP_CONVERGENCE is not True:
+        pytest.skip("skipped because of BGP Convergence failure")
+
+    # test case name
+    tc_name = request.node.name
+    write_test_header(tc_name)
+
+    # Creating configuration from JSON
+    reset_config_on_routers(tgen)
+
+    # Create Static Routes
+    input_dict = {
+        "r1": {
+            "static_routes": [{
+                "network": "10.0.20.1/32",
+                "no_of_ip": 9,
+                "next_hop": "10.0.0.2"
+            }]
+        }
+    }
+    result = create_static_routes(tgen, input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Api call to redistribute static routes
+
+    # Create ip prefix list
+    input_dict_1 = {
+        "r3": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [{
+                        "seqid": "10",
+                        "network": "10.0.0.0/8",
+                        "le": "32",
+                        "action": "permit"
+                    }]
+                }
+            }
+        }
+
+    }
+    result = create_prefix_lists(tgen, input_dict_1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Configure prefix list to bgp neighbor
+    input_dict_2 = {
+        "r1": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "redistribute": [
+                                {"redist_type": "static"},
+                                {"redist_type": "connected"}
+                            ]
+                        }
+                    }
+                }
+            }
+        },
+        "r3": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "neighbor": {
+                                "r4": {
+                                    "dest_link": {
+                                        "r3": {
+                                            "prefix_lists": [
+                                                {
+                                                    "name": "pf_list_1",
+                                                    "direction": "out"
+                                                }
+                                            ]
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    result = create_router_bgp(tgen, topo, input_dict_2)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r4"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Modify ip prefix list
+    input_dict_1 = {
+        "r3": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [
+                        {
+                            "seqid": "10",
+                            "network": "10.0.0.0/8",
+                            "le": "32",
+                            "action": "deny"
+                        },
+                        {
+                            "seqid": "11",
+                            "network": "any",
+                            "action": "permit"
+                        }
+                    ]
+                }
+            }
+        }
+
+    }
+    result = create_prefix_lists(tgen, input_dict_1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Api call to clear bgp, so config changes would be reflected
+    dut = "r3"
+    result = clear_bgp_and_verify(tgen, topo, dut)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r4"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol)
+    assert result is not True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    write_test_footer(tc_name)
+
+
+def test_modify_prefix_lists_out_deny_to_permit(request):
+    """
+    Modify ip prefix list and test deny to permit prefixes OUT direction
+    """
+
+    tgen = get_topogen()
+    if BGP_CONVERGENCE is not True:
+        pytest.skip("skipped because of BGP Convergence failure")
+
+    # test case name
+    tc_name = request.node.name
+    write_test_header(tc_name)
+
+    # Creating configuration from JSON
+    reset_config_on_routers(tgen)
+
+    # Create Static Routes
+    input_dict = {
+        "r1": {
+            "static_routes": [{
+                "network": "10.0.20.1/32",
+                "no_of_ip": 9,
+                "next_hop": "10.0.0.2"
+            }]
+        }
+    }
+    result = create_static_routes(tgen, input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Api call to redistribute static routes
+    # Create ip prefix list
+    input_dict_1 = {
+        "r3": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [
+                        {
+                            "seqid": "10",
+                            "network": "10.0.0.0/8",
+                            "le": "32",
+                            "action": "deny"
+                        },
+                        {
+                            "seqid": "11",
+                            "network": "any",
+                            "action": "permit"
+                        }
+                    ]
+                }
+            }
+        }
+
+    }
+    result = create_prefix_lists(tgen, input_dict_1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Configure prefix list to bgp neighbor
+    input_dict_2 = {
+        "r1": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "redistribute": [
+                                {"redist_type": "static"},
+                                {"redist_type": "connected"}
+                            ]
+                        }
+                    }
+                }
+            }
+        },
+        "r3": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "neighbor": {
+                                "r4": {
+                                    "dest_link":{
+                                        "r3": {
+                                            "prefix_lists": [
+                                                {
+                                                    "name": "pf_list_1",
+                                                    "direction": "out"
+                                                }
+                                            ]
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    result = create_router_bgp(tgen, topo, input_dict_2)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r4"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol)
+    assert result is not True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Modify ip prefix list
+    input_dict_1 = {
+        "r3": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [{
+                        "seqid": "10",
+                        "network": "10.0.0.0/8",
+                        "le": "32",
+                        "action": "permit"
+                    }]
+                }
+            }
+        }
+
+    }
+    result = create_prefix_lists(tgen, input_dict_1)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Api call to clear bgp, so config changes would be reflected
+    dut = "r3"
+    result = clear_bgp_and_verify(tgen, topo, dut)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r4"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    write_test_footer(tc_name)
+
+
+def test_ip_prefix_lists_implicit_deny(request):
+    """
+    Create ip prefix list and test implicit deny
+    """
+
+    tgen = get_topogen()
+    if BGP_CONVERGENCE is not True:
+        pytest.skip("skipped because of BGP Convergence failure")
+
+    # test case name
+    tc_name = request.node.name
+    write_test_header(tc_name)
+
+    # Creating configuration from JSON
+    reset_config_on_routers(tgen)
+
+    # Create Static Routes
+    input_dict = {
+        "r1": {
+            "static_routes": [{
+                "network": "10.0.20.1/32",
+                "no_of_ip": 9,
+                "next_hop": "10.0.0.2"
+            }]
+        }
+    }
+    result = create_static_routes(tgen, input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Create Static Routes
+    input_dict_1 = {
+        "r2": {
+            "static_routes": [{
+                "network": "20.0.20.1/32",
+                "no_of_ip": 9,
+                "next_hop": "10.0.0.1"
+            }]
+        }
+    }
+    result = create_static_routes(tgen, input_dict)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Api call to redistribute static routes
+    # Create ip prefix list
+    input_dict_3 = {
+        "r3": {
+            "prefix_lists": {
+                "ipv4": {
+                    "pf_list_1": [{
+                        "seqid": "10",
+                        "network": "10.0.0.0/8",
+                        "le": "32",
+                        "action": "permit"
+                    }]
+                }
+            }
+        }
+
+    }
+    result = create_prefix_lists(tgen, input_dict_3)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Configure prefix list to bgp neighbor
+    input_dict_4 = {
+        "r1": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "redistribute": [
+                                {"redist_type": "static"},
+                                {"redist_type": "connected"}
+                            ]
+                        }
+                    }
+                }
+            }
+        },
+        "r2": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "redistribute": [
+                                {"redist_type": "static"},
+                                {"redist_type": "connected"}
+                            ]
+                        }
+                    }
+                }
+            }
+        },
+        "r3": {
+            "bgp": {
+                "address_family": {
+                    "ipv4": {
+                        "unicast": {
+                            "neighbor": {
+                                "r4": {
+                                    "dest_link": {
+                                        "r3": {
+                                            "prefix_lists": [
+                                                {
+                                                    "name": "pf_list_1",
+                                                    "direction": "out"
+                                                }
+                                            ]
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    result = create_router_bgp(tgen, topo, input_dict_4)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r4"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol)
+    assert result is True, "Testcase {} : Failed \n Error: {}".format(
+        tc_name, result)
+
+    # Verifying RIB routes
+    dut = "r4"
+    protocol = "bgp"
+    result = verify_rib(tgen, "ipv4", dut, input_dict_1, protocol=protocol)
+    assert result is not 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))
diff --git a/tests/topotests/lib/common_config.py b/tests/topotests/lib/common_config.py
index 99825dd2a..63fcddd83 100644
--- a/tests/topotests/lib/common_config.py
+++ b/tests/topotests/lib/common_config.py
@@ -1346,3 +1346,57 @@ def verify_admin_distance_for_static_routes(tgen, input_dict):
 
     logger.info("Exiting lib API: verify_admin_distance_for_static_routes()")
     return True
+
+
+def verify_prefix_lists(tgen, input_dict):
+    """
+    Running "show ip prefix-list" command and verifying given prefix-list
+    is present in router.
+
+    Parameters
+    ----------
+    * `tgen` : topogen object
+    * `input_dict`: data to verify prefix lists
+
+    Usage
+    -----
+    # To verify pf_list_1 is present in router r1
+    input_dict = {
+        "r1": {
+            "prefix_lists": ["pf_list_1"]
+        }}
+    result = verify_prefix_lists("ipv4", input_dict, tgen)
+
+    Returns
+    -------
+    errormsg(str) or True
+    """
+
+    logger.info("Entering lib API: verify_prefix_lists()")
+
+    for router in input_dict.keys():
+        if router not in tgen.routers():
+            continue
+
+        rnode = tgen.routers()[router]
+
+        # Show ip prefix list
+        show_prefix_list = rnode.vtysh_cmd("show ip prefix-list")
+
+        # Verify Prefix list is deleted
+        prefix_lists_addr = input_dict[router]["prefix_lists"]
+        for addr_type in prefix_lists_addr:
+            if not check_address_types(addr_type):
+                continue
+
+            for prefix_list in prefix_lists_addr[addr_type].keys():
+                if prefix_list in show_prefix_list:
+                    errormsg = ("Prefix list {} is not deleted from router"
+                                " {}".format(prefix_list, router))
+                    return errormsg
+
+                logger.info("Prefix list %s is/are deleted successfully"
+                            " from router %s", prefix_list, router)
+
+    logger.info("Exiting lib API: verify_prefix_lissts()")
+    return True