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frr/tests/topotests/ospf_basic_functionality/test_ospf_single_area.py
Daniel Baumann a2d156806a
Merging upstream version 10.2.
Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-05 10:17:20 +01:00

988 lines
32 KiB
Python

#!/usr/bin/python
# SPDX-License-Identifier: ISC
#
# Copyright (c) 2020 by VMware, Inc. ("VMware")
# Used Copyright (c) 2018 by Network Device Education Foundation, Inc.
# ("NetDEF") in this file.
#
"""OSPF Basic Functionality Automation."""
import os
import sys
import time
import pytest
from copy import deepcopy
from ipaddress import IPv4Address
from lib.topotest import frr_unicode
# 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 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,
step,
create_interfaces_cfg,
)
from lib.topolog import logger
from lib.topojson import build_config_from_json
from lib.ospf import (
verify_ospf_neighbor,
config_ospf_interface,
clear_ospf,
verify_ospf_rib,
verify_ospf_interface,
)
pytestmark = [pytest.mark.ospfd, pytest.mark.staticd]
# Global variables
topo = None
"""
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.
5. Verify NFSM events when ospf nbr changes with different MTU values.
"""
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...
json_file = "{}/ospf_single_area.json".format(CWD)
tgen = Topogen(json_file, mod.__name__)
global topo
topo = tgen.json_topo
# ... and here it calls Mininet initialization functions.
# Starting topology, create tmp files which are loaded to routers
# to start daemons 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():
"""
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(frr_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(frr_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, "Testcase 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)
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, "Testcase 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, "Testcase 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, "Testcase 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, "Testcase Failed \n Error {}".format(
ospf_covergence
)
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, "Testcase Failed \n Error {}".format(
ospf_covergence
)
dut = "r1"
input_dict = {
"r1": {
"links": {
"r0": {
"ospf": {
"ifUp": True,
"ifFlags": "<UP,LOWER_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("{}".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)
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)
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, "Testcase Failed \n Error {}".format(
ospf_covergence
)
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, "Testcase 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, "Testcase 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_tc4_mtu_ignore_p0(request):
"""
OSPF NFSM - MTU change
Verify NFSM events when ospf nbr changes with different MTU values
"""
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")
step("Configure OSPF on all the routers of the topology.")
step("Verify that OSPF neighbors are FULL.")
reset_config_on_routers(tgen)
result = verify_ospf_neighbor(tgen, topo)
assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
step(
"Modify the MTU to non default Value on R0 to R1 interface. "
"Reset ospf neighbors on R0."
)
rtr0 = tgen.routers()["r0"]
rtr1 = tgen.routers()["r1"]
r0_r1_intf = topo["routers"]["r0"]["links"]["r1"]["interface"]
r1_r0_intf = topo["routers"]["r1"]["links"]["r0"]["interface"]
rtr0.run("ip link set {} mtu 1200".format(r0_r1_intf))
clear_ospf(tgen, "r0")
step("Verify that OSPF neighborship between R0 and R1 is stuck in Exstart State.")
result = verify_ospf_neighbor(tgen, topo, expected=False)
assert result is not True, (
"Testcase {} : Failed \n OSPF nbrs are Full "
"instead of Exstart. Error: {}".format(tc_name, result)
)
step("Verify that configured MTU value is updated in the show ip ospf interface.")
dut = "r0"
input_dict = {"r0": {"links": {"r1": {"ospf": {"mtuBytes": 1200}}}}}
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 MTU to non default Value on R0 to R1 interface. "
"Reset ospf neighbors on R0."
)
rtr0.run("ip link set {} mtu 1500".format(r0_r1_intf))
clear_ospf(tgen, "r0")
step("Verify that OSPF neighborship between R0 and R1 becomes full.")
result = verify_ospf_neighbor(tgen, topo)
assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
step(
"Configure mtu ignore and change the value of the mtu to non default"
" on R0 to R1 interface. Reset ospf neighbors on R0."
)
r0_ospf_mtu = {"r0": {"links": {"r1": {"ospf": {"mtu_ignore": True}}}}}
result = config_ospf_interface(tgen, topo, r0_ospf_mtu)
assert result is True, "Testcase {} :Failed \n Error: {}".format(tc_name, result)
dut = "r0"
input_dict = {"r0": {"links": {"r1": {"ospf": {"mtuMismatchDetect": 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)
r1_ospf_mtu = {"r1": {"links": {"r0": {"ospf": {"mtu_ignore": True}}}}}
result = config_ospf_interface(tgen, topo, r1_ospf_mtu)
assert result is True, "Testcase {} :Failed \n Error: {}".format(tc_name, result)
rtr0.run("ip link set {} mtu 1200".format(r0_r1_intf))
clear_ospf(tgen, "r0")
step("Verify that OSPF neighborship between R0 and R1 becomes full.")
result = verify_ospf_neighbor(tgen, topo)
assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
step(
"Unconfigure mtu-ignore command from the interface. "
"Reset ospf neighbors on R0."
)
r1_ospf_mtu = {
"r1": {"links": {"r0": {"ospf": {"mtu_ignore": True, "del_action": True}}}}
}
result = config_ospf_interface(tgen, topo, r1_ospf_mtu)
assert result is True, "Testcase {} :Failed \n Error: {}".format(tc_name, result)
clear_ospf(tgen, "r0")
step("Verify that OSPF neighborship between R0 and R1 is stuck in Exstart State.")
result = verify_ospf_neighbor(tgen, topo, expected=False)
assert result is not True, (
"Testcase {} : Failed \n OSPF nbrs are Full "
"instead of Exstart. Error: {}".format(tc_name, result)
)
step("Modify the MTU to again default valaue on R0 to R1 interface.")
rtr0.run("ip link set {} mtu 1500".format(r0_r1_intf))
clear_ospf(tgen, "r0")
step("Verify that OSPF neighborship between R0 and R1 becomes full.")
result = verify_ospf_neighbor(tgen, topo)
assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
step("Configure ospf interface with jumbo MTU (9216). Reset ospf neighbors on R0.")
rtr0.run("ip link set {} mtu 9216".format(r0_r1_intf))
rtr1.run("ip link set {} mtu 9216".format(r1_r0_intf))
clear_ospf(tgen, "r0")
clear_ospf(tgen, "r1")
step("Verify that OSPF neighborship between R0 and R1 becomes full.")
result = verify_ospf_neighbor(tgen, topo)
assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
step("Verify that jumbo MTU is updated in the show ip ospf interface.")
dut = "r0"
input_dict = {"r0": {"links": {"r1": {"ospf": {"mtuBytes": 9216}}}}}
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)
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))