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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# test_ospf_te_topo1.py
# Part of NetDEF Topology Tests
#
# Copyright (c) 2021 by Orange
# Author: Olivier Dugeon <olivier.dugeon@orange.com>
#
"""
test_ospf_te_topo1.py: Test the FRR OSPF with Traffic Engineering.
+------------+
| |
| R1 |
| 10.0.225.1 |
| |
+------------+
r1-eth0| |r1-eth1
| |
10.0.0.0/24| |10.0.1.0/24
| |
r2-eth0| |r2-eth1
+------------+ +------------+
| | | |
| R2 |r2-eth2 r3-eth0| R3 |
| 10.0.255.2 +------------------+ 10.0.255.3 |
| | 10.0.3.0/24 | |
+------------+ +------+-----+
r2-eth3| r3-eth1|
| |
10.0.4.0/24| 10.0.5.0/24|
| |
r4-eth0| V
+------------+ ASBR 10.0.255.5
| |
| R4 |
| 10.0.255.4 |
| |
+------------+
"""
import os
import sys
import json
from functools import partial
# 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
# Required to instantiate the topology builder class.
# Import topogen and topotest helpers
from lib import topotest
from lib.topogen import Topogen, TopoRouter, get_topogen
from lib.topolog import logger
# and Finally pytest
import pytest
pytestmark = [pytest.mark.ospfd]
def build_topo(tgen):
"Build function"
# Create 4 routers
for routern in range(1, 5):
tgen.add_router("r{}".format(routern))
# Interconect router 1 and 2 with 2 links
switch = tgen.add_switch("s1")
switch.add_link(tgen.gears["r1"])
switch.add_link(tgen.gears["r2"])
switch = tgen.add_switch("s2")
switch.add_link(tgen.gears["r1"])
switch.add_link(tgen.gears["r2"])
# Interconect router 3 and 2
switch = tgen.add_switch("s3")
switch.add_link(tgen.gears["r3"])
switch.add_link(tgen.gears["r2"])
# Interconect router 4 and 2
switch = tgen.add_switch("s4")
switch.add_link(tgen.gears["r4"])
switch.add_link(tgen.gears["r2"])
# Interconnect router 3 with next AS
switch = tgen.add_switch("s5")
switch.add_link(tgen.gears["r3"])
def setup_module(mod):
"Sets up the pytest environment"
logger.info("\n\n---- Starting OSPF TE tests ----\n")
tgen = Topogen(build_topo, mod.__name__)
tgen.start_topology()
router_list = tgen.routers()
for rname, router in router_list.items():
router.load_config(
TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
)
router.load_config(
TopoRouter.RD_OSPF, os.path.join(CWD, "{}/ospfd.conf".format(rname))
)
# Initialize all routers.
tgen.start_router()
def teardown_module():
"Teardown the pytest environment"
tgen = get_topogen()
tgen.stop_topology()
logger.info("\n\n---- OSPF TE tests End ----\n")
def compare_ted_json_output(tgen, rname, fileref):
"Compare TED JSON output"
logger.info('Comparing router "%s" TED output', rname)
filename = "{}/reference/{}".format(CWD, fileref)
expected = json.loads(open(filename).read())
command = "show ip ospf mpls-te database json"
# Run test function until we get an result. Wait at most 60 seconds.
test_func = partial(topotest.router_json_cmp, tgen.gears[rname], command, expected)
_, diff = topotest.run_and_expect(test_func, None, count=60, wait=2)
assertmsg = '"{}" TED JSON output mismatches the expected result'.format(rname)
assert diff is None, assertmsg
def setup_testcase(msg):
"Setup test case"
logger.info(msg)
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
return tgen
# Note that all routers must discover the same Network Topology, so the same TED.
def test_step1():
"Step1: Check initial topology"
tgen = setup_testcase("Step1: test initial OSPF TE Data Base")
for rname in ["r1", "r2", "r3", "r4"]:
compare_ted_json_output(tgen, rname, "ted_step1.json")
def test_step2():
"Step2: Shutdown interface between r1 and r2 and verify that \
corresponding Edges are removed from the TED on all routers "
tgen = setup_testcase("Step2: Shutdown interface between r1 & r2")
tgen.net["r1"].cmd('vtysh -c "conf t" -c "interface r1-eth1" -c "shutdown"')
tgen.net["r2"].cmd('vtysh -c "conf t" -c "interface r2-eth1" -c "shutdown"')
for rname in ["r1", "r2", "r3", "r4"]:
compare_ted_json_output(tgen, rname, "ted_step2.json")
def test_step3():
"Step3: Disable Inter-AS on r3 and verify that corresponding Edge and \
remote ASBR are removed from the TED on all routers"
tgen = setup_testcase("Step3: Disable Inter-AS on r3")
tgen.net["r3"].cmd('vtysh -c "conf t" -c "router ospf" -c "no mpls-te inter-as"')
for rname in ["r1", "r2", "r3", "r4"]:
compare_ted_json_output(tgen, rname, "ted_step3.json")
def test_step4():
"Step4: Enable Segment Routing on r1 and r2 and verify that corresponding \
Edges are updated with Adjacency SID and Subnets with Prefix SID in the \
TED on all routers"
tgen = setup_testcase("Step4: Enable Segment Routing on r1 & r2")
tgen.net["r1"].cmd('vtysh -c "conf t" -c "router ospf" -c "segment-routing on"')
tgen.net["r1"].cmd(
'vtysh -c "conf t" -c "router ospf" -c "segment-routing global-block 20000 23999"'
)
tgen.net["r1"].cmd(
'vtysh -c "conf t" -c "router ospf" -c "segment-routing prefix 10.0.255.1/32 index 10"'
)
tgen.net["r2"].cmd('vtysh -c "conf t" -c "router ospf" -c "segment-routing on"')
tgen.net["r2"].cmd(
'vtysh -c "conf t" -c "router ospf" -c "segment-routing node-msd 16"'
)
tgen.net["r2"].cmd(
'vtysh -c "conf t" -c "router ospf" -c "segment-routing global-block 16000 23999 local-block 5000 6999"'
)
tgen.net["r2"].cmd(
'vtysh -c "conf t" -c "router ospf" -c "segment-routing prefix 10.0.255.2/32 index 20 explicit-null"'
)
for rname in ["r1", "r2", "r3", "r4"]:
compare_ted_json_output(tgen, rname, "ted_step4.json")
def test_step5():
"Step5: Re-enable interface between r1 & r2 and verify that corresponding \
Edges are added in the TED on all routers"
tgen = setup_testcase("Step5: Re-enable interface between r1 & r2")
tgen.net["r1"].cmd('vtysh -c "conf t" -c "interface r1-eth1" -c "no shutdown"')
tgen.net["r2"].cmd('vtysh -c "conf t" -c "interface r2-eth1" -c "no shutdown"')
for rname in ["r1", "r2", "r3", "r4"]:
compare_ted_json_output(tgen, rname, "ted_step5.json")
def test_step6():
"Step6: Set delay and jitter for interface r4-eth0 on r4, remove use-bw \
for interface r2-eth3 on r2 and verify that corresponding Edges are \
updated in the TED on all routers"
tgen = setup_testcase("Step6: Modify link parameters on r2 & r4")
tgen.net["r2"].cmd(
'vtysh -c "conf t" -c "interface r2-eth3" -c "link-params" -c "no use-bw"'
)
tgen.net["r4"].cmd(
'vtysh -c "conf t" -c "interface r4-eth0" -c "link-params" -c "delay 20000"'
)
tgen.net["r4"].cmd(
'vtysh -c "conf t" -c "interface r4-eth0" -c "link-params" -c "delay-variation 10000"'
)
for rname in ["r1", "r2", "r3", "r4"]:
compare_ted_json_output(tgen, rname, "ted_step6.json")
def test_step7():
"Step7: Disable OSPF on r4 and verify that corresponding Vertex, Edges and \
Subnets are removed from the TED on all remaining routers"
tgen = setup_testcase("Step7: Disable OSPF on r4")
tgen.net["r4"].cmd('vtysh -c "conf t" -c "no router ospf"')
for rname in ["r1", "r2", "r3"]:
compare_ted_json_output(tgen, rname, "ted_step7.json")
def test_memory_leak():
"Run the memory leak test and report results."
tgen = get_topogen()
if not tgen.is_memleak_enabled():
pytest.skip("Memory leak test/report is disabled")
tgen.report_memory_leaks()
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
|
