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tests: add basic topotest cases for sbfd Initiator and Reflector
Signed-off-by: wumu.zsl <wumu.zsl@alibaba-inc.com>
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tests/topotests/sbfd_topo1/__init__.py
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tests/topotests/sbfd_topo1/__init__.py
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tests/topotests/sbfd_topo1/r1/frr.conf
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tests/topotests/sbfd_topo1/r1/frr.conf
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ip forwarding
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ipv6 forwarding
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!
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interface r1-eth0
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ipv6 address 2001::10/64
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!
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!
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tests/topotests/sbfd_topo1/r2/frr.conf
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tests/topotests/sbfd_topo1/r2/frr.conf
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ip forwarding
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ipv6 forwarding
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!
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interface r2-eth0
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ipv6 address 2001::20/64
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!
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!
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tests/topotests/sbfd_topo1/sbfd_topo1.dot
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tests/topotests/sbfd_topo1/sbfd_topo1.dot
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## Color coding:
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#########################
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## Main FRR: #f08080 red
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## Switches: #d0e0d0 gray
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## RIP: #19e3d9 Cyan
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## RIPng: #fcb314 dark yellow
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## OSPFv2: #32b835 Green
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## OSPFv3: #19e3d9 Cyan
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## ISIS IPv4 #fcb314 dark yellow
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## ISIS IPv6 #9a81ec purple
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## BGP IPv4 #eee3d3 beige
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## BGP IPv6 #fdff00 yellow
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##### Colors (see http://www.color-hex.com/)
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graph template {
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label="template";
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# Routers
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r1 [
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shape=doubleoctagon,
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label="A\nAS 100\n1.1.1.1",
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fillcolor="#f08080",
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style=filled,
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];
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r2 [
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shape=doubleoctagon
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label="B\nAS 200\n1.1.1.2",
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fillcolor="#f08080",
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style=filled,
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];
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# Switches
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s1 [
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shape=oval,
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label="s1\n192.168.0.0/24",
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fillcolor="#d0e0d0",
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style=filled,
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];
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# Connections
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r1 -- s1 [label="A-eth0"];
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r2 -- s1 [label="B-eth0"];
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}
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tests/topotests/sbfd_topo1/test_sbfd_topo1.py
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tests/topotests/sbfd_topo1/test_sbfd_topo1.py
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#!/usr/bin/env python
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#
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# test_sbfd_topo1.py
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# basic test cases for sbfd initiator and reflector
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#
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# Copyright (c) 2025 by Alibaba, Inc.
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#
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# Permission to use, copy, modify, and/or distribute this software
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# for any purpose with or without fee is hereby granted, provided
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# that the above copyright notice and this permission notice appear
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# in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
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# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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# OF THIS SOFTWARE.
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#
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"""
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<template>.py: Test <template>.
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"""
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import os
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import sys
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import pytest
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import json
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import re
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import time
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import pdb
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from functools import partial
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# Save the Current Working Directory to find configuration files.
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CWD = os.path.dirname(os.path.realpath(__file__))
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sys.path.append(os.path.join(CWD, '../'))
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# pylint: disable=C0413
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# Import topogen and topotest helpers
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from lib import topotest
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from lib.topogen import Topogen, TopoRouter, get_topogen
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from lib.topolog import logger
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from lib.common_config import required_linux_kernel_version
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"""
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test_sbfd_topo1.py: test simple sbfd with IPv6 encap. RT1 is sbfd Initiator, RT2 is sbfd Reflector
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+----+----+ +----+----+
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| | | |
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| RT1 | 1 | RT2 |
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| +--------+ |
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| 2001::10| | 2001::20|
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+----+----+ +----+----+
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"""
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pytestmark = [pytest.mark.bfdd, pytest.mark.sbfd]
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def show_bfd_check(router, status, type='echo', encap=None):
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output = router.cmd("vtysh -c 'show bfd peers'")
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if encap:
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# check encap data if any
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pattern1 = re.compile(r'encap-data {}'.format(encap))
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ret = pattern1.findall(output)
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if len(ret) <= 0:
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logger.info("encap-data not match")
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return False
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# check status
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pattern2 = re.compile(r'Status: {}'.format(status))
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ret = pattern2.findall(output)
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if len(ret) <= 0:
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logger.info("Status not match")
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return False
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# check type
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pattern3 = re.compile(r'Peer Type: {}'.format(type))
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ret = pattern3.findall(output)
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if len(ret) <= 0:
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logger.info("Peer Type not match")
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return False
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logger.info("all check passed")
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return True
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def build_topo(tgen):
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"Test topology builder"
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# This function only purpose is to define allocation and relationship
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# between routers, switches and hosts.
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#
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# Example
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#
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# Create 2 routers
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for routern in range(1, 3):
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tgen.add_router('r{}'.format(routern))
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# Create a switch with just one router connected to it to simulate a
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# empty network.
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switch = tgen.add_switch('s1')
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switch.add_link(tgen.gears['r1'])
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switch.add_link(tgen.gears['r2'])
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def setup_module(mod):
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"Sets up the pytest environment"
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# This function initiates the topology build with Topogen...
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tgen = Topogen(build_topo, mod.__name__)
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# ... and here it calls Mininet initialization functions.
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tgen.start_topology()
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# This is a sample of configuration loading.
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router_list = tgen.routers()
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for rname, router in router_list.items():
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router.load_frr_config(
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os.path.join(CWD, "{}/frr.conf".format(rname)),
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[(TopoRouter.RD_ZEBRA, None), (TopoRouter.RD_BFD, None)])
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# After loading the configurations, this function loads configured daemons.
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tgen.start_router()
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# Verify that we are using the proper version and that the BFD
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# daemon exists.
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for router in router_list.values():
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# Check for Version
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if router.has_version('<', '5.1'):
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tgen.set_error('Unsupported FRR version')
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break
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def teardown_module(mod):
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"Teardown the pytest environment"
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tgen = get_topogen()
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# This function tears down the whole topology.
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tgen.stop_topology()
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# step 1 : config sbfd Initiator and reflector
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def test_sbfd_config_check():
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"Assert that config sbfd and check sbfd status."
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# Required linux kernel version for this suite to run.
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result = required_linux_kernel_version("4.5")
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if result is not True:
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pytest.skip("Kernel requirements are not met")
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tgen = get_topogen()
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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# config sbfd
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r1 = tgen.net['r1']
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r1.cmd("ping -c 5 2001::20")
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r1.cmd("vtysh -c 'config t' -c 'bfd' -c 'peer 2001::20 bfd-mode sbfd-init bfd-name 2-44 local-address 2001::10 remote-discr 1234'")
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r2 = tgen.net['r2']
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r2.cmd("vtysh -c 'config t' -c 'bfd' -c 'sbfd reflector source-address 2001::20 discriminator 1234'")
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check_func = partial(
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show_bfd_check, r1, 'up', type='sbfd initiator'
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)
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success, _ = topotest.run_and_expect(check_func, True, count=15, wait=1)
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assert success is True, "sbfd not up in 15 seconds"
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# step 2: shutdown if and no shutdown if then check sbfd status
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def test_sbfd_updown_interface():
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"Assert that updown interface then check sbfd status."
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# Required linux kernel version for this suite to run.
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result = required_linux_kernel_version("4.5")
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if result is not True:
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pytest.skip("Kernel requirements are not met")
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tgen = get_topogen()
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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r1 = tgen.net['r1']
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r2 = tgen.net['r2']
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# shutdown interface
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r2.cmd("vtysh -c 'config t' -c 'interface r2-eth0' -c 'shutdown'")
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check_func = partial(
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show_bfd_check, r1, 'down', type='sbfd initiator'
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)
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success, _ = topotest.run_and_expect(check_func, True, count=15, wait=1)
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assert success is True, "sbfd not down in 15 seconds after shut"
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# up interface
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r2.cmd("vtysh -c 'config t' -c 'interface r2-eth0' -c 'no shutdown'")
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check_func = partial(
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show_bfd_check, r1, 'up', type='sbfd initiator'
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)
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success, _ = topotest.run_and_expect(check_func, True, count=15, wait=1)
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assert success is True, "sbfd not up in 15 seconds after no shut"
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# step 3: change transmit-interval and check sbfd status according to the interval time
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def test_sbfd_change_transmit_interval():
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"Assert that sbfd status changes align with transmit-interval."
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# Required linux kernel version for this suite to run.
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result = required_linux_kernel_version("4.5")
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if result is not True:
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pytest.skip("Kernel requirements are not met")
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tgen = get_topogen()
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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r1 = tgen.net['r1']
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r2 = tgen.net['r2']
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r1.cmd("vtysh -c 'config t' -c 'bfd' -c 'peer 2001::20 bfd-mode sbfd-init bfd-name 2-44 local-address 2001::10 remote-discr 1234' -c 'transmit-interval 3000'")
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#wait sometime for polling finish
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time.sleep(1)
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# shutdown interface
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r2.cmd("vtysh -c 'config t' -c 'interface r2-eth0' -c 'shutdown'")
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#wait enough time for timeout
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check_func = partial(
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show_bfd_check, r1, 'down', type='sbfd initiator'
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)
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success, _ = topotest.run_and_expect(check_func, True, count=5, wait=3)
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assert success is True, "sbfd not down as expected"
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r2.cmd("vtysh -c 'config t' -c 'interface r2-eth0' -c 'no shutdown'")
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check_func = partial(
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show_bfd_check, r1, 'up', type='sbfd initiator'
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)
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success, _ = topotest.run_and_expect(check_func, True, count=15, wait=1)
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assert success is True, "sbfd not up in 15 seconds after no shut"
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r1.cmd("vtysh -c 'config t' -c 'bfd' -c 'no peer 2001::20 bfd-mode sbfd-init bfd-name 2-44 local-address 2001::10 remote-discr 1234'")
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success = show_bfd_check(r1, 'up', type='sbfd initiator')
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assert success is False, "sbfd not deleted as unexpected"
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# Memory leak test template
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def test_memory_leak():
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"Run the memory leak test and report results."
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tgen = get_topogen()
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if not tgen.is_memleak_enabled():
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pytest.skip('Memory leak test/report is disabled')
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tgen.report_memory_leaks()
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if __name__ == '__main__':
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args = ["-s"] + sys.argv[1:]
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sys.exit(pytest.main(args))
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