diff options
Diffstat (limited to 'tests/topotests/ospf_basic_functionality/test_ospf_single_area.py')
| -rw-r--r-- | tests/topotests/ospf_basic_functionality/test_ospf_single_area.py | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/tests/topotests/ospf_basic_functionality/test_ospf_single_area.py b/tests/topotests/ospf_basic_functionality/test_ospf_single_area.py index 6f6b119abc..e94680d974 100644 --- a/tests/topotests/ospf_basic_functionality/test_ospf_single_area.py +++ b/tests/topotests/ospf_basic_functionality/test_ospf_single_area.py @@ -101,6 +101,7 @@ TESTCASES = 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. """ @@ -976,6 +977,153 @@ def test_ospf_dead_tc11_p0(request): 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("ifconfig {} 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("ifconfig {} 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("ifconfig {} 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, "delete": 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("ifconfig {} 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("ifconfig {} mtu 9216".format(r0_r1_intf)) + rtr1.run("ifconfig {} 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)) |