def test_standby_tor_downstream_t1_link_recovered(
ptfhost, rand_selected_dut, rand_unselected_dut,
verify_crm_nexthop_counter_not_increased, tbinfo):
"""
Verify traffic is distributed evenly after t1 link is recovered;
Verify CRM that no new nexthop created
"""
PAUSE_TIME = 30
down_link = shutdown_random_one_t1_link(rand_selected_dut)
time.sleep(PAUSE_TIME)
params = dualtor_info(ptfhost, rand_selected_dut, rand_unselected_dut,
tbinfo)
try:
check_tunnel_balance(**params)
except Exception as e:
no_shutdown_t1_link(rand_selected_dut, down_link)
raise e
no_shutdown_t1_link(rand_selected_dut, down_link)
time.sleep(PAUSE_TIME)
params = dualtor_info(ptfhost, rand_selected_dut, rand_unselected_dut,
tbinfo)
# For mocked dualtor, we should update static route manually after link recovered
if 't0' in tbinfo['topo']['name']:
remove_static_routes(rand_selected_dut, params['active_tor_ip'])
add_nexthop_routes(rand_selected_dut, params['active_tor_ip'])
check_tunnel_balance(**params)
def test_standby_tor_downstream_bgp_recovered(
ptfhost, rand_selected_dut, rand_unselected_dut,
verify_crm_nexthop_counter_not_increased, tbinfo):
"""
Verify traffic is shifted to the active links and no traffic drop observed;
Verify traffic is distributed evenly after BGP session is recovered;
Verify CRM that no new nexthop created
"""
PAUSE_TIME = 30
down_bgp = shutdown_random_one_bgp_session(rand_selected_dut)
time.sleep(PAUSE_TIME)
params = dualtor_info(ptfhost, rand_selected_dut, rand_unselected_dut,
tbinfo)
try:
check_tunnel_balance(**params)
except Exception as e:
startup_bgp_session(rand_selected_dut, down_bgp)
raise e
startup_bgp_session(rand_selected_dut, down_bgp)
time.sleep(PAUSE_TIME)
params = dualtor_info(ptfhost, rand_selected_dut, rand_unselected_dut,
tbinfo)
check_tunnel_balance(**params)
def test_standby_tor_downstream_bgp_recovered(
rand_selected_dut, require_mocked_dualtor,
verify_crm_nexthop_counter_not_increased, get_testbed_params, tbinfo):
"""
Verify traffic is shifted to the active links and no traffic drop observed;
Verify traffic is distributed evenly after BGP session is recovered;
Verify CRM that no new nexthop created
"""
# require real dualtor, because for mocked testbed, the route to standby is mocked.
pt_require('dualtor' in tbinfo['topo']['name'],
"Only run on dualtor testbed")
PAUSE_TIME = 30
down_bgp = shutdown_random_one_bgp_session(rand_selected_dut)
time.sleep(PAUSE_TIME)
params = get_testbed_params()
try:
check_tunnel_balance(**params)
except Exception as e:
startup_bgp_session(rand_selected_dut, down_bgp)
raise e
startup_bgp_session(rand_selected_dut, down_bgp)
time.sleep(PAUSE_TIME)
params = get_testbed_params()
check_tunnel_balance(**params)
def test_standby_tor_downstream(rand_selected_dut, require_mocked_dualtor,
get_testbed_params):
"""
Verify tunnel traffic to active ToR is distributed equally across nexthops, and
no traffic is forwarded to server from standby ToR
"""
params = get_testbed_params()
check_tunnel_balance(**params)
def test_standby_tor_downstream(ptfhost, rand_selected_dut, rand_unselected_dut,
tbinfo, require_mocked_dualtor):
"""
Verify tunnel traffic to active ToR is distributed equally across nexthops, and
no traffic is forwarded to server from standby ToR
"""
params = dualtor_info(ptfhost, rand_selected_dut, rand_unselected_dut, tbinfo)
check_tunnel_balance(**params)
def test_standby_tor_downstream_loopback_route_readded(ptfhost, rand_selected_dut, rand_unselected_dut, tbinfo):
"""
Verify traffic is equally distributed via loopback route
"""
pt_require('dualtor' in tbinfo['topo']['name'], "Only run on dualtor testbed")
params = dualtor_info(ptfhost, rand_selected_dut, rand_unselected_dut, tbinfo)
active_tor_loopback0 = params['active_tor_ip']
# Remove loopback routes and verify traffic is equally distributed
remove_static_routes(rand_selected_dut, active_tor_loopback0)
check_tunnel_balance(**params)
# Readd loopback routes and verify traffic is equally distributed
add_nexthop_routes(rand_selected_dut, active_tor_loopback0)
check_tunnel_balance(**params)
def test_downstream_standby_mux_toggle_active(
conn_graph_facts, ptfadapter, ptfhost,
rand_selected_dut, rand_unselected_dut, tbinfo,
require_mocked_dualtor, tunnel_traffic_monitor,
vmhost, toggle_all_simulator_ports, tor_mux_intfs
):
# set rand_selected_dut as standby and rand_unselected_dut to active tor
test_params = dualtor_info(ptfhost, rand_selected_dut, rand_unselected_dut, tbinfo)
server_ipv4 = test_params["target_server_ip"]
random_dst_ip = "1.1.1.2"
pkt, exp_pkt = build_packet_to_server(rand_selected_dut, ptfadapter, random_dst_ip)
ptf_t1_intf = random.choice(get_t1_ptf_ports(rand_selected_dut, tbinfo))
def monitor_tunnel_and_server_traffic(torhost, expect_tunnel_traffic=True, expect_server_traffic=True):
tunnel_monitor = tunnel_traffic_monitor(rand_selected_dut, existing=True)
server_traffic_monitor = ServerTrafficMonitor(
torhost, ptfhost, vmhost, tbinfo, test_params["selected_port"],
conn_graph_facts, exp_pkt, existing=False, is_mocked=is_mocked_dualtor(tbinfo)
)
tunnel_monitor.existing = expect_tunnel_traffic
server_traffic_monitor.existing = expect_server_traffic
with tunnel_monitor, server_traffic_monitor:
testutils.send(ptfadapter, int(ptf_t1_intf.strip("eth")), pkt, count=10)
logger.info("Stage 1: Verify Standby Forwarding")
logger.info("Step 1.1: Add route to a nexthop which is a standby Neighbor")
set_mux_state(rand_selected_dut, tbinfo, 'standby', tor_mux_intfs, toggle_all_simulator_ports)
add_nexthop_routes(rand_selected_dut, random_dst_ip, nexthops=[server_ipv4])
logger.info("Step 1.2: Verify traffic to this route dst is forwarded to Active ToR and equally distributed")
check_tunnel_balance(**test_params)
monitor_tunnel_and_server_traffic(rand_selected_dut, expect_server_traffic=False, expect_tunnel_traffic=True)
logger.info("Stage 2: Verify Active Forwarding")
logger.info("Step 2.1: Simulate Mux state change to active")
set_mux_state(rand_selected_dut, tbinfo, 'active', tor_mux_intfs, toggle_all_simulator_ports)
logger.info("Step 2.2: Verify traffic to this route dst is forwarded directly to server")
monitor_tunnel_and_server_traffic(rand_selected_dut, expect_server_traffic=True, expect_tunnel_traffic=False)
logger.info("Stage 3: Verify Standby Forwarding Again")
logger.info("Step 3.1: Simulate Mux state change to standby")
set_mux_state(rand_selected_dut, tbinfo, 'standby', tor_mux_intfs, toggle_all_simulator_ports)
logger.info("Step 3.2: Verify traffic to this route dst is now redirected back to Active ToR and equally distributed")
monitor_tunnel_and_server_traffic(rand_selected_dut, expect_server_traffic=False, expect_tunnel_traffic=True)
check_tunnel_balance(**test_params)
remove_static_routes(rand_selected_dut, random_dst_ip)
