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topotests: add bgp_nhg_topo2 test to check for bgp nhg cases
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When not used by default, bgp nexthop group are not tested
against the following route entry added:
- route entry resolved over default route
- route entry resolved over itself
- route entry resolved over blackhole route
- route entry connected (case mplsvpn)
- route entry using ipv4 mapped ipv6 address

This test suite covers the above use cases.

Signed-off-by: Philippe Guibert <[email protected]>
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@pguibert6WIND
pguibert6WIND committed May 17, 2024
1 parent 5ae269c commit ec14152
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Empty file added tests/topotests/bgp_nhg_topo2/__init__.py
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141 changes: 141 additions & 0 deletions tests/topotests/bgp_nhg_topo2/r1/bgp_ipv4.json
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{
"vrfId": 0,
"routerId": "192.0.2.1",
"defaultLocPrf": 100,
"localAS": 65500,
"routes": {
"0.0.0.0/0": [
{
"valid": true,
"bestpath": true,
"pathFrom": "external",
"prefix":"0.0.0.0",
"prefixLen": 0,
"network": "0.0.0.0/0",
"metric": 0,
"weight": 0,
"peerId": "172.31.0.2",
"path": "65501",
"origin": "IGP",
"nexthops": [
{
"ip": "172.31.0.2",
"afi": "ipv4",
"used": true
}
]
}
],
"172.31.1.0/24": [
{
"valid": true,
"bestpath": true,
"pathFrom": "external",
"prefix": "172.31.1.0",
"prefixLen": 24,
"network": "172.31.1.0/24",
"metric": 0,
"weight": 0,
"peerId": "172.31.0.2",
"path": "65501",
"origin": "IGP",
"nexthops": [
{
"ip": "172.31.0.2",
"afi": "ipv4",
"used": true
}
]
}
],
"192.168.1.0/24": [
{
"valid": true,
"bestpath": true,
"prefix": "192.168.1.0",
"prefixLen": 24,
"network": "192.168.1.0/24",
"metric": 0,
"locPrf": 100,
"weight": 0,
"peerId": "172.31.0.3",
"path": "",
"origin": "IGP",
"nexthops": [
{
"ip": "172.31.2.4",
"afi": "ipv4",
"used": true
}
]
}
],
"192.168.2.0/24": [
{
"valid": true,
"bestpath": true,
"pathFrom": "internal",
"prefix": "192.168.2.0",
"prefixLen": 24,
"network": "192.168.2.0/24",
"metric": 0,
"locPrf": 100,
"weight": 0,
"peerId": "172.31.0.3",
"path": "",
"origin": "IGP",
"nexthops": [
{
"ip":"172.31.3.4",
"afi": "ipv4",
"used": true
}
]
}
],
"192.168.3.0/24": [
{
"valid": true,
"bestpath": true,
"pathFrom": "internal",
"prefix": "192.168.3.0",
"prefixLen": 24,
"network": "192.168.3.0/24",
"metric": 0,
"locPrf": 100,
"weight": 0,
"peerId": "172.31.0.3",
"path": "",
"origin": "IGP",
"nexthops": [
{
"ip": "192.168.3.3",
"afi": "ipv4",
"used": true
}
]
}
],
"192.168.4.0/24": [
{
"valid": true,
"bestpath": true,
"prefix": "192.168.4.0",
"prefixLen": 24,
"network": "192.168.4.0/24",
"metric": 0,
"weight": 32768,
"path": "",
"announceNexthopSelf": true,
"nhVrfName": "vrf1",
"nexthops": [
{
"ip": "0.0.0.0",
"afi": "ipv4",
"used": true
}
]
}
]
}
}
42 changes: 42 additions & 0 deletions tests/topotests/bgp_nhg_topo2/r1/bgpd.conf
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bgp nexthop-group
route-map rmap_ipv6 permit 1
set ipv6 next-hop prefer-global
exit
router bgp 65500
bgp router-id 192.0.2.1
no bgp ebgp-requires-policy
bgp labeled-unicast ipv4-explicit-null
neighbor 172.31.0.2 remote-as 65501
neighbor 172.31.0.3 remote-as 65500
neighbor 172.31.0.4 remote-as 65500
neighbor 192.0.2.4 remote-as 65500
neighbor 192.0.2.4 update-source lo
neighbor 192.0.2.4 capability extended-nexthop
neighbor 192.0.2.4 timers connect 1
address-family ipv4 unicast
import vrf vrf1
import vpn
no neighbor 192.0.2.4 activate
no neighbor 172.31.0.4 activate
network 192.0.2.1/32
exit-address-family
!
address-family ipv4 labeled-unicast
neighbor 172.31.0.4 activate
exit-address-family
!
address-family ipv6 unicast
neighbor 192.0.2.4 activate
neighbor 192.0.2.4 route-map rmap_ipv6 in
exit-address-family
!
exit
router bgp 65500 vrf vrf1
address-family ipv4 unicast
redistribute connected
export vpn
exit-address-family
!
exit


37 changes: 37 additions & 0 deletions tests/topotests/bgp_nhg_topo2/r1/ip_route_192_168_1_0.json
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{
"192.168.1.0/24":[
{
"prefix":"192.168.1.0/24",
"prefixLen":24,
"protocol":"bgp",
"vrfId":0,
"vrfName":"default",
"selected":true,
"destSelected":true,
"distance":200,
"metric":0,
"installed":true,
"table":254,
"internalNextHopNum":2,
"internalNextHopActiveNum":2,
"nexthops":[
{
"ip":"172.31.2.4",
"afi":"ipv4",
"active":true,
"recursive":true,
"weight":1
},
{
"fib":true,
"ip":"172.31.0.2",
"afi":"ipv4",
"interfaceName":"r1-eth0",
"resolver":true,
"active":true,
"weight":1
}
]
}
]
}
34 changes: 34 additions & 0 deletions tests/topotests/bgp_nhg_topo2/r1/ip_route_192_168_2_0.json
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{
"192.168.2.0/24":[
{
"prefix":"192.168.2.0/24",
"prefixLen":24,
"protocol":"bgp",
"vrfId":0,
"vrfName":"default",
"selected":true,
"destSelected":true,
"distance":200,
"metric":0,
"installed":true,
"table":254,
"nexthops":[
{
"ip":"172.31.3.4",
"afi":"ipv4",
"active":true,
"recursive":true,
"weight":1
},
{
"fib":true,
"unreachable":true,
"blackhole":true,
"resolver":true,
"active":true,
"weight":1
}
]
}
]
}
44 changes: 44 additions & 0 deletions tests/topotests/bgp_nhg_topo2/r1/ip_route_192_168_3_0.json
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{
"192.168.3.0/24":[
{
"prefix":"192.168.3.0/24",
"prefixLen":24,
"protocol":"bgp",
"vrfId":0,
"vrfName":"default",
"distance":200,
"metric":0,
"table":254,
"nexthops":[
{
"ip":"192.168.3.3",
"afi":"ipv4",
"weight":1
}
]
},
{
"prefix":"192.168.3.0/24",
"prefixLen":24,
"protocol":"static",
"vrfId":0,
"vrfName":"default",
"selected":true,
"destSelected":true,
"distance":1,
"metric":0,
"installed":true,
"table":254,
"nexthops":[
{
"fib":true,
"ip":"192.168.5.10",
"afi":"ipv4",
"interfaceName":"r1-eth2",
"active":true,
"weight":1
}
]
}
]
}
24 changes: 24 additions & 0 deletions tests/topotests/bgp_nhg_topo2/r1/ip_route_192_168_4_0.json
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{
"192.168.4.0/24":[
{
"prefix":"192.168.4.0/24",
"prefixLen":24,
"protocol":"bgp",
"vrfName":"default",
"selected":true,
"destSelected":true,
"distance":20,
"metric":0,
"installed":true,
"table":254,
"nexthops":[
{
"fib":true,
"directlyConnected":true,
"interfaceName":"vrf1",
"active":true
}
]
}
]
}
33 changes: 33 additions & 0 deletions tests/topotests/bgp_nhg_topo2/r1/ipv6_route_1001_64.json
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{
"1001::/64":[
{
"prefix":"1001::/64",
"prefixLen":64,
"protocol":"bgp",
"vrfId":0,
"vrfName":"default",
"selected":true,
"destSelected":true,
"distance":200,
"metric":0,
"table":254,
"nexthops":[
{
"ip":"::ffff:c000:204",
"afi":"ipv6",
"active":true,
"recursive":true,
"weight":1
},
{
"ip":"172.31.0.4",
"afi":"ipv4",
"interfaceName":"r1-eth0",
"resolver":true,
"active":true,
"weight":1
}
]
}
]
}
20 changes: 20 additions & 0 deletions tests/topotests/bgp_nhg_topo2/r1/zebra.conf
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ip route 172.31.3.4/32 blackhole
ip route 192.168.3.0/24 192.168.5.10
ipv6 route 1010::/64 1003::10
interface r1-eth0
ip address 172.31.0.1/24
ipv6 address ::ffff:172.31.0.1/24
!
interface r1-eth1
ip address 192.168.0.1/24
!
interface r1-eth2
ip address 192.168.5.1/24
ipv6 address 1003::1/64
!
interface r1-eth3 vrf vrf1
ip address 192.168.4.1/24
!
interface lo
ip address 192.0.2.1/32
!
10 changes: 10 additions & 0 deletions tests/topotests/bgp_nhg_topo2/r2/bgpd.conf
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router bgp 65501
bgp router-id 192.0.2.2
no bgp ebgp-requires-policy
neighbor 172.31.0.1 remote-as 65500
address-family ipv4 unicast
neighbor 172.31.0.1 activate
neighbor 172.31.0.1 default-originate
network 172.31.1.0/24
exit-address-family
!
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