]>
Commit | Line | Data |
---|---|---|
6a28d135 | 1 | #!/usr/bin/env python |
acddc0ed | 2 | # SPDX-License-Identifier: ISC |
6a28d135 A |
3 | |
4 | # | |
5 | # bgp_tcp_mss.py | |
6 | # Part of NetDEF Topology Tests | |
7 | # | |
8 | # Copyright (c) 2021 by | |
9 | # Shreenidhi A R <rshreenidhi@vmware.com> | |
10 | # | |
6a28d135 A |
11 | |
12 | """ | |
13 | bgp_tcp_mss_vrf.py: | |
14 | ||
15 | Need to verify if the tcp-mss value is reflected in the TCP session and in VRF. | |
16 | """ | |
17 | ||
18 | import os | |
19 | import sys | |
20 | import json | |
21 | import pytest | |
22 | import functools | |
23 | import platform | |
24 | import socket | |
25 | import subprocess | |
26 | ||
27 | # add after imports, before defining classes or functions: | |
28 | pytestmark = [pytest.mark.bgpd] | |
29 | ||
30 | CWD = os.path.dirname(os.path.realpath(__file__)) | |
31 | sys.path.append(os.path.join(CWD, "../")) | |
32 | ||
33 | # pylint: disable=C0413 | |
34 | from lib import topotest | |
35 | from lib.topogen import Topogen, TopoRouter, get_topogen | |
36 | from lib.topojson import build_config_from_json | |
37 | from lib.topolog import logger | |
38 | import time | |
39 | from lib.bgp import ( | |
40 | clear_bgp, | |
41 | clear_bgp_and_verify, | |
42 | create_router_bgp, | |
43 | modify_as_number, | |
44 | verify_as_numbers, | |
45 | verify_bgp_convergence, | |
46 | verify_bgp_rib, | |
47 | verify_bgp_timers_and_functionality, | |
48 | verify_router_id, | |
49 | verify_tcp_mss | |
50 | ) | |
51 | from lib.common_config import ( | |
52 | kill_router_daemons, | |
53 | start_router_daemons, | |
54 | addKernelRoute, | |
55 | apply_raw_config, | |
56 | check_address_types, | |
57 | create_prefix_lists, | |
58 | create_route_maps, | |
59 | create_static_routes, | |
60 | required_linux_kernel_version, | |
61 | reset_config_on_routers, | |
62 | start_topology, | |
63 | step, | |
64 | verify_admin_distance_for_static_routes, | |
65 | verify_bgp_community, | |
66 | verify_fib_routes, | |
67 | verify_rib, | |
68 | write_test_footer, | |
69 | write_test_header | |
70 | ) | |
71 | ||
72 | pytestmark = [pytest.mark.bgpd] | |
73 | # Global variables | |
74 | NETWORK1_1 = {"ipv4": "1.1.1.1/32", "ipv6": "1::1/128"} | |
75 | NETWORK1_2 = {"ipv4": "1.1.1.2/32", "ipv6": "1::2/128"} | |
76 | NETWORK2_1 = {"ipv4": "2.1.1.1/32", "ipv6": "2::1/128"} | |
77 | NETWORK2_2 = {"ipv4": "2.1.1.2/32", "ipv6": "2::2/128"} | |
78 | NETWORK3_1 = {"ipv4": "3.1.1.1/32", "ipv6": "3::1/128"} | |
79 | NETWORK3_2 = {"ipv4": "3.1.1.2/32", "ipv6": "3::2/128"} | |
80 | NETWORK4_1 = {"ipv4": "4.1.1.1/32", "ipv6": "4::1/128"} | |
81 | NETWORK4_2 = {"ipv4": "4.1.1.2/32", "ipv6": "4::2/128"} | |
82 | NETWORK5_1 = {"ipv4": "5.1.1.1/32", "ipv6": "5::1/128"} | |
83 | NETWORK5_2 = {"ipv4": "5.1.1.2/32", "ipv6": "5::2/128"} | |
84 | ||
85 | NEXT_HOP_IP = {"ipv4": "Null0", "ipv6": "Null0"} | |
86 | ||
87 | ## File name | |
88 | TCPDUMP_FILE="test_tcp_packet_test.txt" | |
89 | ||
90 | def setup_module(mod): | |
91 | """ | |
92 | Sets up the pytest environment | |
93 | ||
94 | * `mod`: module name | |
95 | """ | |
96 | global topo,TCPDUMP_FILE | |
97 | ||
98 | # Required linux kernel version for this suite to run. | |
99 | result = required_linux_kernel_version("4.15") | |
100 | if result is not True: | |
101 | pytest.skip("Kernel requirements are not met") | |
102 | ||
103 | testsuite_run_time = time.asctime(time.localtime(time.time())) | |
104 | step("Testsuite start time: {}".format(testsuite_run_time)) | |
105 | step("=" * 40) | |
106 | ||
107 | step("Running setup_module to create topology") | |
108 | ||
109 | # This function initiates the topology build with Topogen... | |
110 | json_file = "{}/bgp_vrf_tcp_mss.json".format(CWD) | |
111 | tgen = Topogen(json_file, mod.__name__) | |
112 | global topo | |
113 | topo = tgen.json_topo | |
114 | # ... and here it calls Mininet initialization functions. | |
115 | # Starting topology, create tmp files which are loaded to routers | |
d60a3f0e | 116 | # to start daemons and then start routers |
6a28d135 A |
117 | start_topology(tgen) |
118 | # Creating configuration from JSON | |
119 | build_config_from_json(tgen, topo) | |
120 | ||
121 | global ADDR_TYPES | |
122 | global BGP_CONVERGENCE | |
123 | ADDR_TYPES = check_address_types() | |
124 | BGP_CONVERGENCE = verify_bgp_convergence(tgen, topo) | |
125 | assert BGP_CONVERGENCE is True, "setup_module :Failed \n Error: {}".format( | |
126 | BGP_CONVERGENCE | |
127 | ) | |
128 | ||
129 | step("Running setup_module() done") | |
130 | ||
131 | def teardown_module(): | |
132 | """Teardown the pytest environment""" | |
133 | ||
134 | step("Running teardown_module to delete topology") | |
135 | ||
136 | tgen = get_topogen() | |
137 | ||
138 | # Stop toplogy and Remove tmp files | |
139 | tgen.stop_topology() | |
140 | ||
141 | step( | |
142 | "Testsuite end time: {}".format(time.asctime(time.localtime(time.time()))) | |
143 | ) | |
144 | step("=" * 40) | |
145 | ||
146 | ||
147 | ##################################################### | |
148 | # | |
149 | # Testcases | |
150 | # | |
151 | ##################################################### | |
152 | ||
153 | def test_bgp_vrf_tcp_mss(request): | |
154 | tgen = get_topogen() | |
155 | tc_name = request.node.name | |
156 | if tgen.routers_have_failure(): | |
157 | pytest.skip(tgen.errors) | |
158 | ||
159 | step("Verify the router failures") | |
160 | if tgen.routers_have_failure(): | |
161 | check_router_status(tgen) | |
162 | ||
163 | step("Configuring 5 static Routes in Router R3 with NULL0 as Next hop") | |
164 | for addr_type in ADDR_TYPES: | |
165 | static_routes_input = { | |
166 | "r3": { | |
167 | "static_routes": [ | |
168 | { | |
169 | "network": [NETWORK1_1[addr_type]] + [NETWORK1_2[addr_type]], | |
170 | "next_hop": NEXT_HOP_IP[addr_type], | |
171 | }, | |
172 | { | |
173 | "network": [NETWORK2_1[addr_type]] + [NETWORK2_2[addr_type]], | |
174 | "next_hop": NEXT_HOP_IP[addr_type], | |
175 | }, | |
176 | { | |
177 | "network": [NETWORK3_1[addr_type]] + [NETWORK3_2[addr_type]], | |
178 | "next_hop": NEXT_HOP_IP[addr_type], | |
179 | }, | |
180 | { | |
181 | "network": [NETWORK4_1[addr_type]] + [NETWORK4_2[addr_type]], | |
182 | "next_hop": NEXT_HOP_IP[addr_type], | |
183 | }, | |
184 | { | |
185 | "network": [NETWORK5_1[addr_type]] + [NETWORK5_2[addr_type]], | |
186 | "next_hop": NEXT_HOP_IP[addr_type], | |
187 | }, | |
188 | ] | |
189 | } | |
190 | } | |
191 | result = create_static_routes(tgen, static_routes_input) | |
192 | assert result is True, "Testcase {} : Failed \n Error: {}".format( | |
193 | tc_name, result | |
194 | ) | |
195 | ||
196 | step("Verify the static Routes in R3 on default VRF") | |
197 | for addr_type in ADDR_TYPES: | |
198 | static_routes_input = { | |
199 | "r3": { | |
200 | "static_routes": [ | |
201 | { | |
202 | "network": [NETWORK1_1[addr_type]] + [NETWORK1_2[addr_type]], | |
203 | "next_hop": NEXT_HOP_IP[addr_type], | |
204 | }, | |
205 | { | |
206 | "network": [NETWORK2_1[addr_type]] + [NETWORK2_2[addr_type]], | |
207 | "next_hop": NEXT_HOP_IP[addr_type], | |
208 | }, | |
209 | { | |
210 | "network": [NETWORK3_1[addr_type]] + [NETWORK3_2[addr_type]], | |
211 | "next_hop": NEXT_HOP_IP[addr_type], | |
212 | }, | |
213 | { | |
214 | "network": [NETWORK4_1[addr_type]] + [NETWORK4_2[addr_type]], | |
215 | "next_hop": NEXT_HOP_IP[addr_type], | |
216 | }, | |
217 | { | |
218 | "network": [NETWORK5_1[addr_type]] + [NETWORK5_2[addr_type]], | |
219 | "next_hop": NEXT_HOP_IP[addr_type], | |
220 | }, | |
221 | ] | |
222 | } | |
223 | } | |
224 | dut = "r3" | |
225 | result = verify_bgp_rib(tgen, addr_type, dut, static_routes_input) | |
226 | assert result is True, "Testcase {} :Failed \n Error {}".format(tc_name, result) | |
227 | ||
228 | step("Verify the static Routes in R2 on default VRF") | |
229 | for addr_type in ADDR_TYPES: | |
230 | static_routes_input = { | |
231 | "r3": { | |
232 | "static_routes": [ | |
233 | { | |
234 | "network": [NETWORK1_1[addr_type]] + [NETWORK1_2[addr_type]], | |
235 | "next_hop": NEXT_HOP_IP[addr_type], | |
236 | }, | |
237 | { | |
238 | "network": [NETWORK2_1[addr_type]] + [NETWORK2_2[addr_type]], | |
239 | "next_hop": NEXT_HOP_IP[addr_type], | |
240 | }, | |
241 | { | |
242 | "network": [NETWORK3_1[addr_type]] + [NETWORK3_2[addr_type]], | |
243 | "next_hop": NEXT_HOP_IP[addr_type], | |
244 | }, | |
245 | { | |
246 | "network": [NETWORK4_1[addr_type]] + [NETWORK4_2[addr_type]], | |
247 | "next_hop": NEXT_HOP_IP[addr_type], | |
248 | }, | |
249 | { | |
250 | "network": [NETWORK5_1[addr_type]] + [NETWORK5_2[addr_type]], | |
251 | "next_hop": NEXT_HOP_IP[addr_type], | |
252 | }, | |
253 | ] | |
254 | } | |
255 | } | |
256 | dut = "r2" | |
257 | result = verify_bgp_rib(tgen, addr_type, dut, static_routes_input) | |
258 | assert result is True, "Testcase {} :Failed \n Error {}".format(tc_name, result) | |
259 | ||
260 | step("importing default vrf on R2 under VRF RED Address Family") | |
261 | for addr_type in ADDR_TYPES: | |
262 | input_import_vrf = { | |
263 | "r2": { | |
264 | "bgp": [ | |
265 | { | |
266 | "local_as": 200, | |
267 | "vrf": "RED", | |
268 | "address_family": { | |
269 | addr_type: {"unicast": {"import": {"vrf": "default"}}} | |
270 | }, | |
271 | } | |
272 | ] | |
273 | } | |
274 | } | |
275 | result = create_router_bgp(tgen, topo, input_import_vrf) | |
276 | assert result is True, "Testcase {} : Failed \n Error: {}".format( | |
277 | tc_name, result | |
278 | ) | |
279 | ||
280 | step("Verify the static Routes in R2 on RED VRF") | |
281 | for addr_type in ADDR_TYPES: | |
282 | static_routes_input = { | |
283 | "r3": { | |
284 | "static_routes": [ | |
285 | { | |
286 | "network": [NETWORK1_1[addr_type]] + [NETWORK1_2[addr_type]], | |
287 | "next_hop": NEXT_HOP_IP[addr_type], | |
288 | "vrf": "RED", | |
289 | }, | |
290 | { | |
291 | "network": [NETWORK2_1[addr_type]] + [NETWORK2_2[addr_type]], | |
292 | "next_hop": NEXT_HOP_IP[addr_type], | |
293 | "vrf": "RED", | |
294 | }, | |
295 | { | |
296 | "network": [NETWORK3_1[addr_type]] + [NETWORK3_2[addr_type]], | |
297 | "next_hop": NEXT_HOP_IP[addr_type], | |
298 | "vrf": "RED", | |
299 | }, | |
300 | { | |
301 | "network": [NETWORK4_1[addr_type]] + [NETWORK4_2[addr_type]], | |
302 | "next_hop": NEXT_HOP_IP[addr_type], | |
303 | "vrf": "RED", | |
304 | }, | |
305 | { | |
306 | "network": [NETWORK5_1[addr_type]] + [NETWORK5_2[addr_type]], | |
307 | "next_hop": NEXT_HOP_IP[addr_type], | |
308 | "vrf": "RED", | |
309 | }, | |
310 | ] | |
311 | } | |
312 | } | |
313 | dut = "r2" | |
314 | result = verify_bgp_rib(tgen, addr_type, dut, static_routes_input) | |
315 | assert result is True, "Testcase {} :Failed \n Error {}".format(tc_name, result) | |
316 | ||
317 | step("Verify the static Routes in R1 on RED VRF") | |
318 | for addr_type in ADDR_TYPES: | |
319 | static_routes_input = { | |
320 | "r3": { | |
321 | "static_routes": [ | |
322 | { | |
323 | "network": [NETWORK1_1[addr_type]] + [NETWORK1_2[addr_type]], | |
324 | "next_hop": NEXT_HOP_IP[addr_type], | |
325 | "vrf": "RED", | |
326 | }, | |
327 | { | |
328 | "network": [NETWORK2_1[addr_type]] + [NETWORK2_2[addr_type]], | |
329 | "next_hop": NEXT_HOP_IP[addr_type], | |
330 | "vrf": "RED", | |
331 | }, | |
332 | { | |
333 | "network": [NETWORK3_1[addr_type]] + [NETWORK3_2[addr_type]], | |
334 | "next_hop": NEXT_HOP_IP[addr_type], | |
335 | "vrf": "RED", | |
336 | }, | |
337 | { | |
338 | "network": [NETWORK4_1[addr_type]] + [NETWORK4_2[addr_type]], | |
339 | "next_hop": NEXT_HOP_IP[addr_type], | |
340 | "vrf": "RED", | |
341 | }, | |
342 | { | |
343 | "network": [NETWORK5_1[addr_type]] + [NETWORK5_2[addr_type]], | |
344 | "next_hop": NEXT_HOP_IP[addr_type], | |
345 | "vrf": "RED", | |
346 | }, | |
347 | ] | |
348 | } | |
349 | } | |
350 | dut = "r1" | |
351 | result = verify_bgp_rib(tgen, addr_type, dut, static_routes_input) | |
352 | assert result is True, "Testcase {} :Failed \n Error {}".format(tc_name, result) | |
353 | ||
354 | step("Enabling tcp-mss 150 on Router R1 in VRF RED") | |
355 | TCP_MSS = 150 | |
356 | raw_config = { | |
357 | "r1": { | |
358 | "raw_config": [ | |
359 | "router bgp {} vrf {}".format( | |
360 | topo["routers"]["r1"]["bgp"][0]["local_as"], | |
361 | topo["routers"]["r1"]["bgp"][0]["vrf"], | |
362 | ), | |
363 | "neighbor {} tcp-mss {}".format( | |
364 | topo["routers"]["r2"]["links"]["r1-link1"]["ipv4"].split("/")[0], | |
365 | TCP_MSS, | |
366 | ), | |
367 | "neighbor {} tcp-mss {}".format( | |
368 | topo["routers"]["r2"]["links"]["r1-link1"]["ipv6"].split("/")[0], | |
369 | TCP_MSS, | |
370 | ), | |
371 | ] | |
372 | }, | |
373 | } | |
374 | ||
375 | result = apply_raw_config(tgen, raw_config) | |
376 | assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result) | |
377 | ||
378 | step("Clearing BGP on R1 and R2 ") | |
379 | for addr_type in ADDR_TYPES: | |
380 | clear_bgp(tgen, addr_type, "r1", vrf=topo["routers"]["r1"]["bgp"][0]["vrf"]) | |
381 | clear_bgp(tgen, addr_type, "r2", vrf=topo["routers"]["r2"]["bgp"][1]["vrf"]) | |
382 | ||
383 | step("Verify the BGP Convergence at R1 & R2 after Clear BGP") | |
384 | r1_convergence = verify_bgp_convergence(tgen, topo, dut="r1") | |
385 | assert ( | |
386 | r1_convergence is True | |
387 | ), "BGP convergence after Clear BGP :Failed \n Error: {}".format(r1_convergence) | |
388 | r2_convergence = verify_bgp_convergence(tgen, topo, dut="r2") | |
389 | assert ( | |
390 | r2_convergence is True | |
391 | ), "BGP convergence after Clear BGP :Failed \n Error: {}".format(r2_convergence) | |
392 | ||
393 | step("Verify the TCP-MSS value on both Router R1 and R2") | |
394 | for addr_type in ADDR_TYPES: | |
395 | dut = "r1" | |
396 | tcp_mss_result = verify_tcp_mss( | |
397 | tgen, | |
398 | dut, | |
399 | topo["routers"]["r2"]["links"]["r1-link1"][addr_type].split("/")[0], | |
400 | TCP_MSS, | |
401 | "RED", | |
402 | ) | |
403 | assert tcp_mss_result is True, " TCP-MSS mismatch :Failed \n Error: {}".format( | |
404 | tcp_mss_result | |
405 | ) | |
406 | ||
407 | ||
408 | ||
409 | ||
410 | step("Enabling tcp-mss 500 between R2 and R3 of VRF Default") | |
411 | TCP_MSS = 500 | |
412 | raw_config = { | |
413 | "r2": { | |
414 | "raw_config": [ | |
415 | "router bgp {} ".format(topo["routers"]["r2"]["bgp"][0]["local_as"]), | |
416 | "neighbor {} tcp-mss {}".format( | |
417 | topo["routers"]["r3"]["links"]["r2-link1"]["ipv4"].split("/")[0], | |
418 | TCP_MSS, | |
419 | ), | |
420 | "neighbor {} tcp-mss {}".format( | |
421 | topo["routers"]["r3"]["links"]["r2-link1"]["ipv6"].split("/")[0], | |
422 | TCP_MSS, | |
423 | ), | |
424 | ] | |
425 | }, | |
426 | "r3": { | |
427 | "raw_config": [ | |
428 | "router bgp {} ".format(topo["routers"]["r3"]["bgp"][0]["local_as"]), | |
429 | "neighbor {} tcp-mss {}".format( | |
430 | topo["routers"]["r2"]["links"]["r3-link1"]["ipv4"].split("/")[0], | |
431 | TCP_MSS, | |
432 | ), | |
433 | "neighbor {} tcp-mss {}".format( | |
434 | topo["routers"]["r2"]["links"]["r3-link1"]["ipv6"].split("/")[0], | |
435 | TCP_MSS, | |
436 | ), | |
437 | ] | |
438 | }, | |
439 | } | |
440 | result = apply_raw_config(tgen, raw_config) | |
441 | assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result) | |
442 | ||
443 | ||
444 | ||
445 | step("Clear BGP at router R2 and R3") | |
446 | for addr_type in ADDR_TYPES: | |
447 | clear_bgp(tgen, topo, "r2", addr_type) | |
448 | clear_bgp(tgen, topo, "r3", addr_type) | |
449 | ||
450 | step("Verify the BGP Convergence at R2 & R3 after Clear BGP") | |
451 | r1_convergence = verify_bgp_convergence(tgen, topo, dut="r2") | |
452 | assert ( | |
453 | r1_convergence is True | |
454 | ), "BGP convergence after Clear BGP :Failed \n Error: {}".format(r2_convergence) | |
455 | r2_convergence = verify_bgp_convergence(tgen, topo, dut="r3") | |
456 | assert ( | |
457 | r2_convergence is True | |
458 | ), "BGP convergence after Clear BGP :Failed \n Error: {}".format(r2_convergence) | |
459 | ||
460 | step("Verify the TCP-MSS value on both Router R2 and R3") | |
461 | for addr_type in ADDR_TYPES: | |
462 | dut = "r2" | |
463 | tcp_mss_result = verify_tcp_mss( | |
464 | tgen, | |
465 | dut, | |
466 | topo["routers"]["r3"]["links"]["r2-link1"]["ipv4"].split("/")[0], | |
467 | TCP_MSS, | |
468 | ) | |
469 | assert tcp_mss_result is True, " TCP-MSS mismatch :Failed \n Error: {}".format( | |
470 | tcp_mss_result | |
471 | ) | |
472 | ||
473 | dut = "r3" | |
474 | tcp_mss_result = verify_tcp_mss( | |
475 | tgen, | |
476 | dut, | |
477 | topo["routers"]["r2"]["links"]["r3-link1"]["ipv4"].split("/")[0], | |
478 | TCP_MSS, | |
479 | ) | |
480 | assert tcp_mss_result is True, " TCP-MSS mismatch :Failed \n Error: {}".format( | |
481 | tcp_mss_result | |
482 | ) | |
483 | ||
484 | step("Removing tcp-mss 150 between R1 and R2 of VRF RED ") | |
485 | TCP_MSS = 150 | |
486 | raw_config = { | |
487 | "r1": { | |
488 | "raw_config": [ | |
489 | "router bgp {} vrf {}".format( | |
490 | topo["routers"]["r1"]["bgp"][0]["local_as"], | |
491 | topo["routers"]["r1"]["bgp"][0]["vrf"], | |
492 | ), | |
493 | "no neighbor {} tcp-mss {}".format( | |
494 | topo["routers"]["r2"]["links"]["r1-link1"]["ipv4"].split("/")[0], | |
495 | TCP_MSS, | |
496 | ), | |
497 | "no neighbor {} tcp-mss {}".format( | |
498 | topo["routers"]["r2"]["links"]["r1-link1"]["ipv6"].split("/")[0], | |
499 | TCP_MSS, | |
500 | ), | |
501 | ] | |
502 | } | |
503 | } | |
504 | result = apply_raw_config(tgen, raw_config) | |
505 | assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result) | |
506 | raw_config = { | |
507 | "r2": { | |
508 | "raw_config": [ | |
509 | "router bgp {} vrf {}".format( | |
510 | topo["routers"]["r2"]["bgp"][0]["local_as"], | |
511 | topo["routers"]["r2"]["bgp"][1]["vrf"], | |
512 | ), | |
513 | "no neighbor {} tcp-mss {}".format( | |
514 | topo["routers"]["r1"]["links"]["r2-link1"]["ipv4"].split("/")[0], | |
515 | TCP_MSS, | |
516 | ), | |
517 | "no neighbor {} tcp-mss {}".format( | |
518 | topo["routers"]["r1"]["links"]["r2-link1"]["ipv6"].split("/")[0], | |
519 | TCP_MSS, | |
520 | ), | |
521 | ] | |
522 | } | |
523 | } | |
524 | result = apply_raw_config(tgen, raw_config) | |
525 | assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result) | |
526 | ||
527 | step("Verify the TCP-MSS value cleared on both Router R1 and R2") | |
528 | for addr_type in ADDR_TYPES: | |
529 | dut = "r1" | |
530 | tcp_mss_result = verify_tcp_mss( | |
531 | tgen, | |
532 | dut, | |
533 | topo["routers"]["r2"]["links"]["r1-link1"][addr_type].split("/")[0], | |
534 | TCP_MSS, | |
535 | "RED", | |
536 | ) | |
537 | assert ( | |
538 | tcp_mss_result is not True | |
539 | ), " TCP-MSS mismatch :Failed \n Error: {}".format(tcp_mss_result) | |
540 | ||
541 | dut = "r2" | |
542 | tcp_mss_result = verify_tcp_mss( | |
543 | tgen, | |
544 | dut, | |
545 | topo["routers"]["r1"]["links"]["r2-link1"]["ipv4"].split("/")[0], | |
546 | TCP_MSS, | |
547 | "RED", | |
548 | ) | |
549 | assert ( | |
550 | tcp_mss_result is not True | |
551 | ), " TCP-MSS mismatch :Failed \n Error: {}".format(tcp_mss_result) | |
552 | ||
553 | ||
554 | step("Removing tcp-mss 500 between R2 and R3 of VRF Default ") | |
555 | TCP_MSS = 500 | |
556 | raw_config = { | |
557 | "r2": { | |
558 | "raw_config": [ | |
559 | "router bgp {} ".format(topo["routers"]["r2"]["bgp"][0]["local_as"]), | |
560 | "no neighbor {} tcp-mss {}".format( | |
561 | topo["routers"]["r3"]["links"]["r2-link1"]["ipv4"].split("/")[0], | |
562 | TCP_MSS, | |
563 | ), | |
564 | "no neighbor {} tcp-mss {}".format( | |
565 | topo["routers"]["r3"]["links"]["r2-link1"]["ipv6"].split("/")[0], | |
566 | TCP_MSS, | |
567 | ), | |
568 | ] | |
569 | } | |
570 | } | |
571 | result = apply_raw_config(tgen, raw_config) | |
572 | assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result) | |
573 | ||
574 | raw_config = { | |
575 | "r3": { | |
576 | "raw_config": [ | |
577 | "router bgp {} ".format(topo["routers"]["r3"]["bgp"][0]["local_as"]), | |
578 | "no neighbor {} tcp-mss {}".format( | |
579 | topo["routers"]["r2"]["links"]["r3-link1"]["ipv4"].split("/")[0], | |
580 | TCP_MSS, | |
581 | ), | |
582 | "no neighbor {} tcp-mss {}".format( | |
583 | topo["routers"]["r2"]["links"]["r3-link1"]["ipv6"].split("/")[0], | |
584 | TCP_MSS, | |
585 | ), | |
586 | ] | |
587 | } | |
588 | } | |
589 | result = apply_raw_config(tgen, raw_config) | |
590 | assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result) | |
591 | ||
592 | step("Verify the TCP-MSS value got cleared on both Router R2 and R3") | |
593 | for addr_type in ADDR_TYPES: | |
594 | dut = "r2" | |
595 | tcp_mss_result = verify_tcp_mss( | |
596 | tgen, | |
597 | dut, | |
598 | topo["routers"]["r3"]["links"]["r2-link1"]["ipv4"].split("/")[0], | |
599 | TCP_MSS, | |
600 | ) | |
601 | assert ( | |
602 | tcp_mss_result is not True | |
603 | ), " TCP-MSS mismatch :Failed \n Error: {}".format(tcp_mss_result) | |
604 | ||
605 | dut = "r3" | |
606 | tcp_mss_result = verify_tcp_mss( | |
607 | tgen, | |
608 | dut, | |
609 | topo["routers"]["r2"]["links"]["r3-link1"]["ipv4"].split("/")[0], | |
610 | TCP_MSS, | |
611 | ) | |
612 | assert ( | |
613 | tcp_mss_result is not True | |
614 | ), " TCP-MSS mismatch :Failed \n Error: {}".format(tcp_mss_result) | |
615 | ||
616 | step("Configuring different TCP-MSS R2 and R3 ") | |
617 | TCP_MSS = 500 | |
618 | raw_config = { | |
619 | "r2": { | |
620 | "raw_config": [ | |
621 | "router bgp {}".format(topo["routers"]["r2"]["bgp"][0]["local_as"]), | |
622 | "neighbor {} tcp-mss {}".format( | |
623 | topo["routers"]["r3"]["links"]["r2-link1"]["ipv4"].split("/")[0], | |
624 | TCP_MSS, | |
625 | ), | |
626 | "neighbor {} tcp-mss {}".format( | |
627 | topo["routers"]["r3"]["links"]["r2-link1"]["ipv6"].split("/")[0], | |
628 | TCP_MSS, | |
629 | ), | |
630 | ] | |
631 | } | |
632 | } | |
633 | result = apply_raw_config(tgen, raw_config) | |
634 | assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result) | |
635 | TCP_MSS = 300 | |
636 | raw_config = { | |
637 | "r3": { | |
638 | "raw_config": [ | |
639 | "router bgp {} ".format(topo["routers"]["r3"]["bgp"][0]["local_as"]), | |
640 | "neighbor {} tcp-mss {}".format( | |
641 | topo["routers"]["r2"]["links"]["r3-link1"]["ipv4"].split("/")[0], | |
642 | TCP_MSS, | |
643 | ), | |
644 | "neighbor {} tcp-mss {}".format( | |
645 | topo["routers"]["r2"]["links"]["r3-link1"]["ipv6"].split("/")[0], | |
646 | TCP_MSS, | |
647 | ), | |
648 | ] | |
649 | } | |
650 | } | |
651 | result = apply_raw_config(tgen, raw_config) | |
652 | assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result) | |
653 | ||
654 | step("Verify the TCP-MSS value on both Router R2 and R3") | |
655 | for addr_type in ADDR_TYPES: | |
656 | TCP_MSS = 500 | |
657 | dut = "r2" | |
658 | tcp_mss_result = verify_tcp_mss( | |
659 | tgen, | |
660 | dut, | |
661 | topo["routers"]["r3"]["links"]["r2-link1"]["ipv4"].split("/")[0], | |
662 | TCP_MSS, | |
663 | ) | |
664 | assert tcp_mss_result is True, " TCP-MSS mismatch :Failed \n Error: {}".format( | |
665 | tcp_mss_result | |
666 | ) | |
667 | ||
668 | TCP_MSS = 300 | |
669 | dut = "r3" | |
670 | tcp_mss_result = verify_tcp_mss( | |
671 | tgen, | |
672 | dut, | |
673 | topo["routers"]["r2"]["links"]["r3-link1"]["ipv4"].split("/")[0], | |
674 | TCP_MSS, | |
675 | ) | |
676 | assert tcp_mss_result is True, " TCP-MSS mismatch :Failed \n Error: {}".format( | |
677 | tcp_mss_result | |
678 | ) | |
679 | ||
680 | step("Configure TCP_MSS > MTU on R2 and R3 and it should be 1460 ") | |
681 | TCP_MSS = 4096 | |
682 | REF_TCP_MSS = 1460 | |
683 | raw_config = { | |
684 | "r2": { | |
685 | "raw_config": [ | |
686 | "router bgp {} ".format(topo["routers"]["r2"]["bgp"][0]["local_as"]), | |
687 | "neighbor {} tcp-mss {}".format( | |
688 | topo["routers"]["r3"]["links"]["r2-link1"]["ipv4"].split("/")[0], | |
689 | TCP_MSS, | |
690 | ), | |
691 | "neighbor {} tcp-mss {}".format( | |
692 | topo["routers"]["r3"]["links"]["r2-link1"]["ipv6"].split("/")[0], | |
693 | TCP_MSS, | |
694 | ), | |
695 | ] | |
696 | } | |
697 | } | |
698 | result = apply_raw_config(tgen, raw_config) | |
699 | assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result) | |
700 | raw_config = { | |
701 | "r3": { | |
702 | "raw_config": [ | |
703 | "router bgp {} ".format(topo["routers"]["r3"]["bgp"][0]["local_as"]), | |
704 | "neighbor {} tcp-mss {}".format( | |
705 | topo["routers"]["r2"]["links"]["r3-link1"]["ipv4"].split("/")[0], | |
706 | TCP_MSS, | |
707 | ), | |
708 | "neighbor {} tcp-mss {}".format( | |
709 | topo["routers"]["r2"]["links"]["r3-link1"]["ipv6"].split("/")[0], | |
710 | TCP_MSS, | |
711 | ), | |
712 | ] | |
713 | } | |
714 | } | |
715 | result = apply_raw_config(tgen, raw_config) | |
716 | assert result is True, "Testcase {} : Failed Error: {}".format(tc_name, result) | |
717 | ||
718 | step("Restarting BGP Daemon on R3") | |
719 | ||
720 | kill_router_daemons(tgen, "r3", ["bgpd"]) | |
721 | start_router_daemons(tgen, "r3", ["bgpd"]) | |
722 | ||
723 | step( | |
724 | "Verify the configured TCP-MSS 4096 value on restarting both Daemon both Router R2 and R3 " | |
725 | ) | |
726 | for addr_type in ADDR_TYPES: | |
727 | TCP_MSS = 4096 | |
728 | dut = "r2" | |
729 | tcp_mss_result = verify_tcp_mss( | |
730 | tgen, | |
731 | dut, | |
732 | topo["routers"]["r3"]["links"]["r2-link1"]["ipv4"].split("/")[0], | |
733 | TCP_MSS, | |
734 | ) | |
735 | assert tcp_mss_result is True, " TCP-MSS mismatch :Failed \n Error: {}".format( | |
736 | tcp_mss_result | |
737 | ) | |
738 | dut = "r3" | |
739 | tcp_mss_result = verify_tcp_mss( | |
740 | tgen, | |
741 | dut, | |
742 | topo["routers"]["r2"]["links"]["r3-link1"]["ipv4"].split("/")[0], | |
743 | TCP_MSS, | |
744 | ) | |
745 | assert tcp_mss_result is True, " TCP-MSS mismatch :Failed \n Error: {}".format( | |
746 | tcp_mss_result | |
747 | ) | |
748 | write_test_footer(tc_name) | |
749 | ||
750 | ||
751 | if __name__ == "__main__": | |
752 | args = ["-s"] + sys.argv[1:] | |
753 | sys.exit(pytest.main(args)) |