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topotests: add bgp test to check the ADJ-RIB-IN label value

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The test is done on r2. A BGP update is received on r2, and is
filtered on r2. The RIB of r2 does not have the BGP update stored,
but the ADJ-RIB-IN is yet present. To demonstrate this, if the
inbound route-map is removed, then the BGP update should be copied
from the the ADJ-RIB-IN and added to the RIB with the label
value.

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
This commit is contained in:
Philippe Guibert 2023-02-24 11:53:46 +01:00 committed by Louis Scalbert
parent 415befc30a
commit 40706d5c42
1 changed files with 86 additions and 0 deletions
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86
tests/topotests/bgp_vpnv4_ebgp/test_bgp_vpnv4_ebgp.py
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@ -438,6 +438,92 @@ configure terminal
assert result is None, assertmsg
def test_adj_rib_in_label_change():
"""
Check that syncinig with ADJ-RIB-in on r2
permits restoring the initial label value
"""
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("Enable soft-reconfiguration inbound on r2")
r2 = tgen.gears["r2"]
r2.vtysh_cmd(
"""
configure terminal
router bgp 65501
address-family ipv4 vpn
neighbor 192.168.0.1 soft-reconfiguration inbound
"""
)
logger.info("Applying a deny-all route-map to input on r2")
r2.vtysh_cmd(
"""
configure terminal
route-map DENY-ALL deny 1
!
router bgp 65501
address-family ipv4 vpn
neighbor 192.168.0.1 route-map DENY-ALL in
"""
)
# check that 172.31.0.1 should not be present
logger.info("Check that received update 172.31.0.1 is not present")
expected = {}
test_func = partial(
topotest.router_json_cmp,
r2,
"show bgp ipv4 vpn 172.31.0.1/32 json",
expected,
exact=True,
)
success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
assert success, "r2, vpnv4 update 172.31.0.1 still present"
def test_adj_rib_in_label_change_remove_rmap():
"""
Check that syncinig with ADJ-RIB-in on r2
permits restoring the initial label value
"""
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("Removing the deny-all route-map from input on r2")
r2 = tgen.gears["r2"]
r2.vtysh_cmd(
"""
configure terminal
router bgp 65501
address-family ipv4 vpn
no neighbor 192.168.0.1 route-map DENY-ALL in
"""
)
# Check BGP IPv4 route entry for 172.31.0.1 on r1
logger.info(
"Checking that 172.31.0.1 BGP update is present and has valid label on r2"
)
json_file = "{}/{}/bgp_ipv4_vpn_route_1723101.json".format(CWD, r2.name)
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp,
r2,
"show bgp ipv4 vpn 172.31.0.1/32 json",
expected,
)
_, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
assertmsg = '"{}" JSON output mismatches'.format(r2.name)
assert result is None, assertmsg
def test_memory_leak():
"Run the memory leak test and report results."
tgen = get_topogen()