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tests: Check if aggregated prefix is not advertised to contributing ASes

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Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
This commit is contained in:
Donatas Abraitis 2025-01-30 10:34:32 +02:00
parent 925b365a87
commit 25a37e9367
5 changed files with 98 additions and 33 deletions
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3
tests/topotests/bgp_reject_as_sets/r2/bgpd.conf
View File

@ -6,6 +6,9 @@ router bgp 65002
neighbor 192.168.255.2 timers 3 10
neighbor 192.168.254.2 remote-as 65003
neighbor 192.168.254.2 timers 3 10
neighbor 192.168.253.2 remote-as 65004
neighbor 192.168.253.2 timers 3 10
neighbor 192.168.253.2 solo
address-family ipv4 unicast
aggregate-address 172.16.0.0/16 as-set summary-only
exit-address-family

3
tests/topotests/bgp_reject_as_sets/r2/zebra.conf
View File

@ -5,5 +5,8 @@ interface r2-eth0
interface r2-eth1
ip address 192.168.254.1/30
!
interface r2-eth2
ip address 192.168.253.1/30
!
ip forwarding
!

6
tests/topotests/bgp_reject_as_sets/r4/bgpd.conf Normal file
View File

@ -0,0 +1,6 @@
!
router bgp 65004
no bgp ebgp-requires-policy
neighbor 192.168.253.1 remote-as 65002
neighbor 192.168.253.1 timers 3 10
!

6
tests/topotests/bgp_reject_as_sets/r4/zebra.conf Normal file
View File

@ -0,0 +1,6 @@
!
interface r4-eth0
ip address 192.168.253.2/30
!
ip forwarding
!

113
tests/topotests/bgp_reject_as_sets/test_bgp_reject_as_sets.py
View File

@ -38,7 +38,7 @@ pytestmark = [pytest.mark.bgpd]
def build_topo(tgen):
for routern in range(1, 4):
for routern in range(1, 5):
tgen.add_router("r{}".format(routern))
switch = tgen.add_switch("s1")
@ -49,6 +49,10 @@ def build_topo(tgen):
switch.add_link(tgen.gears["r2"])
switch.add_link(tgen.gears["r3"])
switch = tgen.add_switch("s3")
switch.add_link(tgen.gears["r2"])
switch.add_link(tgen.gears["r4"])
def setup_module(mod):
tgen = Topogen(build_topo, mod.__name__)
@ -78,10 +82,12 @@ def test_bgp_reject_as_sets():
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
router = tgen.gears["r2"]
r2 = tgen.gears["r2"]
r3 = tgen.gears["r3"]
r4 = tgen.gears["r4"]
def _bgp_converge(router):
output = json.loads(router.vtysh_cmd("show ip bgp neighbor 192.168.255.2 json"))
def _bgp_converge():
output = json.loads(r2.vtysh_cmd("show ip bgp neighbor 192.168.255.2 json"))
expected = {
"192.168.255.2": {
"bgpState": "Established",
@ -90,47 +96,88 @@ def test_bgp_reject_as_sets():
}
return topotest.json_cmp(output, expected)
def _bgp_has_aggregated_route_with_stripped_as_set(router):
output = json.loads(router.vtysh_cmd("show ip bgp 172.16.0.0/16 json"))
test_func = functools.partial(_bgp_converge)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
assert result is None, "Failed bgp convergence at r2"
def _bgp_has_aggregated_route():
output = json.loads(r2.vtysh_cmd("show ip bgp 172.16.0.0/16 json"))
expected = {
"paths": [{"aspath": {"string": "Local", "segments": [], "length": 0}}]
"paths": [
{
"aspath": {
"string": "{65001,65003}",
"segments": [{"type": "as-set", "list": [65001, 65003]}],
"length": 1,
},
"aggregatorAs": 65002,
"aggregatorId": "192.168.255.1",
}
]
}
return topotest.json_cmp(output, expected)
def _bgp_announce_route_without_as_sets(router):
output = json.loads(
router.vtysh_cmd(
"show ip bgp neighbor 192.168.254.2 advertised-routes json"
)
)
test_func = functools.partial(_bgp_has_aggregated_route)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
assert result is None, "Failed to see an aggregated route at r2"
def _bgp_announce_route_without_as_sets():
output = json.loads(r4.vtysh_cmd("show ip bgp 172.16.0.0/16 json"))
expected = {
"advertisedRoutes": {
"172.16.0.0/16": {"path": ""},
"192.168.254.0/30": {"path": "65003"},
"192.168.255.0/30": {"path": "65001"},
"paths": [
{
"aspath": {
"string": "65002",
"segments": [{"type": "as-sequence", "list": [65002]}],
"length": 1,
},
"aggregatorAs": 65002,
"aggregatorId": "192.168.255.1",
}
]
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(_bgp_announce_route_without_as_sets)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
assert result is None, "Route 172.16.0.0/16 should be sent without AS_SET to r4"
def _bgp_filter_aggregated_route_to_contributing_as():
output = json.loads(r3.vtysh_cmd("show ip bgp json"))
expected = {
"routes": {
"172.16.254.254/32": [
{
"valid": True,
"bestpath": True,
}
],
"192.168.254.0/30": [
{
"valid": True,
"bestpath": True,
},
{
"valid": True,
},
],
"192.168.255.0/30": [
{
"valid": True,
"bestpath": True,
}
],
},
"totalPrefixCounter": 3,
"totalRoutes": 3,
"totalPaths": 4,
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(_bgp_converge, router)
test_func = functools.partial(_bgp_filter_aggregated_route_to_contributing_as)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
assert result is None, 'Failed bgp convergence in "{}"'.format(router)
test_func = functools.partial(
_bgp_has_aggregated_route_with_stripped_as_set, router
)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
assert result is None, 'Failed to see an aggregated route in "{}"'.format(router)
test_func = functools.partial(_bgp_announce_route_without_as_sets, router)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
assert (
result is None
), 'Route 172.16.0.0/16 should be sent without AS_SET to r3 "{}"'.format(router)
), "Route 172.16.0.0/16 should NOT be sent to contributing AS (r3)"
if __name__ == "__main__":