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#!/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
# 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 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,
)
from lib.topolog import logger
from lib.topojson import build_config_from_json
from lib.ospf import (
verify_ospf_neighbor,
clear_ospf,
verify_ospf_rib,
redistribute_ospf,
)
pytestmark = [pytest.mark.ospfd, pytest.mark.staticd]
# Global variables
topo = None
# Reading the data from JSON File for topology creation
NETWORK = {
"ipv4": [
"11.0.20.1/32",
"11.0.20.2/32",
"11.0.20.3/32",
"11.0.20.4/32",
"11.0.20.5/32",
],
"ipv6": ["1::1/128", "1::2/128", "1::3/128", "1::4/128", "1::5/128"],
}
MASK = {"ipv4": "32", "ipv6": "128"}
NEXT_HOP = {
"ipv4": ["10.0.0.1", "10.0.1.1", "10.0.2.1", "10.0.3.1", "10.0.4.1"],
"ipv6": ["Null0", "Null0", "Null0", "Null0", "Null0"],
}
"""
TOPOOLOGY =
Please view in a fixed-width font such as Courier.
Topo : Broadcast Networks
+---+ +---+ +---+ +---+
|R0 + +R1 + +R2 + +R3 |
+-+-+ +-+-+ +-+-+ +-+-+
| | | |
| | | |
--+-----------+--------------+---------------+-----
Ethernet Segment
TESTCASES =
1. Verify OSPF ECMP with max path configured as 8
(Edge having 1 uplink port as broadcast network,
connect to 8 TORs - LAN case)
"""
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_ecmp_lan.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)
# Api call verify whether OSPF is converged
ospf_covergence = verify_ospf_neighbor(tgen, topo, lan=True)
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"""
logger.info("Running teardown_module to delete topology")
tgen = get_topogen()
try:
# Stop toplogy and Remove tmp files
tgen.stop_topology()
except OSError:
# OSError exception is raised when mininet tries to stop switch
# though switch is stopped once but mininet tries to stop same
# switch again, where it ended up with exception
pass
# ##################################
# Test cases start here.
# ##################################
def test_ospf_lan_ecmp_tc18_p0(request):
"""
OSPF ECMP.
Verify OSPF ECMP with max path configured as 8
(Edge having 1 uplink port as broadcast network,
connect to 8 TORs - LAN case)
"""
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 in all the routers on LAN interface.")
reset_config_on_routers(tgen)
step("Verify that OSPF is up with 8 neighborship sessions.")
ospf_covergence = verify_ospf_neighbor(tgen, topo, lan=True)
assert ospf_covergence is True, "Testcase Failed \n Error {}".format(
ospf_covergence
)
step(
"Configure a static route in all the routes and "
"redistribute static/connected in OSPF."
)
for rtr in topo["routers"]:
input_dict = {
rtr: {
"static_routes": [
{"network": NETWORK["ipv4"][0], "no_of_ip": 5, "next_hop": "Null0"}
]
}
}
result = create_static_routes(tgen, input_dict)
assert result is True, "Testcase {} : Failed \n Error: {}".format(
tc_name, result
)
dut = rtr
redistribute_ospf(tgen, topo, dut, "static")
step(
"Verify that route in R0 in stalled with 8 hops. "
"Verify ospf route table and ip route table."
)
nh = []
for rtr in topo["routers"]:
nh.append(topo["routers"][rtr]["links"]["s1"]["ipv4"].split("/")[0])
nh.remove(topo["routers"]["r1"]["links"]["s1"]["ipv4"].split("/")[0])
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)
protocol = "ospf"
result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol, next_hop=nh)
assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
step(" clear ip ospf interface on DUT(r0)")
clear_ospf(tgen, "r0")
step(
"Verify that after clearing the ospf interface all the "
"neighbours are up and routes are installed with 8 next hop "
"in ospf and ip route tables on R0"
)
dut = "r0"
ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut, lan=True)
assert ospf_covergence is True, "Testcase Failed \n Error {}".format(
ospf_covergence
)
step(" clear ip ospf interface on R2")
clear_ospf(tgen, "r2")
dut = "r2"
ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut, lan=True)
assert ospf_covergence is True, "Testcase Failed \n Error {}".format(
ospf_covergence
)
step("Delete static/connected cmd in ospf in all the routes one by one.")
for rtr in topo["routers"]:
input_dict = {
rtr: {
"static_routes": [
{
"network": NETWORK["ipv4"][0],
"no_of_ip": 5,
"next_hop": "Null0",
"delete": True,
}
]
}
}
result = create_static_routes(tgen, input_dict)
assert result is True, "Testcase {} : Failed \n Error: {}".format(
tc_name, result
)
step("Verify that all the routes are withdrawn from R0")
dut = "r1"
result = verify_ospf_rib(
tgen, dut, input_dict, next_hop=nh, retry_timeout=10, expected=False
)
assert (
result is not True
), "Testcase {} : Failed \n r1: OSPF routes are present \n Error: {}".format(
tc_name, result
)
protocol = "ospf"
result = verify_rib(
tgen,
"ipv4",
dut,
input_dict,
protocol=protocol,
next_hop=nh,
retry_timeout=10,
expected=False,
)
assert (
result is not True
), "Testcase {} : Failed \n r1: routes are still present \n Error: {}".format(
tc_name, result
)
write_test_footer(tc_name)
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
|
