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Example: bgp additional path with php labels

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r1

hostname r1
vrf def v1
 rd 1:1
 label-mode per-prefix
 exit
access-list test4
 deny 1 any all any all
 permit all any all any all
 exit
access-list test6
 deny 58 4321:: ffff:: all 4321:: ffff:: all
 permit all any all any all
 exit
int lo0
 vrf for v1
 ipv4 addr 2.2.2.1 255.255.255.255
 ipv6 addr 4321::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.1 255.255.255.252
 ipv6 addr 1234:1::1 ffff:ffff::
 mpls enable
 ipv4 access-group-in test4
 ipv6 access-group-in test6
 exit
router bgp4 1
 vrf v1
 no safe-ebgp
 address lab
 local-as 1
 router-id 4.4.4.1
 neigh 1.1.1.2 remote-as 2
 neigh 1.1.1.2 label-pop
 neigh 1.1.1.2 additional-path-tx lab
 red conn
 exit
router bgp6 1
 vrf v1
 no safe-ebgp
 address lab
 local-as 1
 router-id 6.6.6.1
 neigh 1234:1::2 remote-as 2
 neigh 1234:1::2 label-pop
 neigh 1234:1::2 additional-path-tx lab
 red conn
 exit
int pweth1
 vrf for v1
 ipv4 addr 3.3.3.1 255.255.255.0
 pseudo v1 lo0 pweompls 2.2.2.3 1234
 exit
int pweth2
 vrf for v1
 ipv4 addr 3.3.4.1 255.255.255.0
 pseudo v1 lo0 pweompls 4321::3 1234
 exit

r2

hostname r2
vrf def v1
 rd 1:1
 label-mode per-prefix
 exit
access-list test4
 deny 1 any all any all
 permit all any all any all
 exit
access-list test6
 deny 58 4321:: ffff:: all 4321:: ffff:: all
 permit all any all any all
 exit
int lo0
 vrf for v1
 ipv4 addr 2.2.2.2 255.255.255.255
 ipv6 addr 4321::2 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.2 255.255.255.252
 ipv6 addr 1234:1::2 ffff:ffff::
 mpls enable
 ipv4 access-group-in test4
 ipv6 access-group-in test6
 exit
int eth2
 vrf for v1
 ipv4 addr 1.1.1.5 255.255.255.252
 ipv6 addr 1234:2::1 ffff:ffff::
 mpls enable
 ipv4 access-group-in test4
 ipv6 access-group-in test6
 exit
router bgp4 1
 vrf v1
 no safe-ebgp
 address lab
 local-as 2
 router-id 4.4.4.2
 neigh 1.1.1.1 remote-as 1
 neigh 1.1.1.1 label-pop
 neigh 1.1.1.1 additional-path-rx lab
 neigh 1.1.1.6 remote-as 3
 neigh 1.1.1.6 label-pop
 neigh 1.1.1.6 additional-path-rx lab
 red conn
 exit
router bgp6 1
 vrf v1
 no safe-ebgp
 address lab
 local-as 2
 router-id 6.6.6.2
 neigh 1234:1::1 remote-as 1
 neigh 1234:1::1 label-pop
 neigh 1234:1::1 additional-path-rx lab
 neigh 1234:2::2 remote-as 3
 neigh 1234:2::2 label-pop
 neigh 1234:2::2 additional-path-rx lab
 red conn
 exit

r3

hostname r3
vrf def v1
 rd 1:1
 label-mode per-prefix
 exit
access-list test4
 deny 1 any all any all
 permit all any all any all
 exit
access-list test6
 deny 58 4321:: ffff:: all 4321:: ffff:: all
 permit all any all any all
 exit
int lo0
 vrf for v1
 ipv4 addr 2.2.2.3 255.255.255.255
 ipv6 addr 4321::3 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.6 255.255.255.252
 ipv6 addr 1234:2::2 ffff:ffff::
 mpls enable
 ipv4 access-group-in test4
 ipv6 access-group-in test6
 exit
router bgp4 1
 vrf v1
 no safe-ebgp
 address lab
 local-as 3
 router-id 4.4.4.3
 neigh 1.1.1.5 remote-as 2
 neigh 1.1.1.5 label-pop
 neigh 1.1.1.5 additional-path-rx lab
 neigh 1.1.1.5 additional-path-tx lab
 red conn
 exit
router bgp6 1
 vrf v1
 no safe-ebgp
 address lab
 local-as 3
 router-id 6.6.6.3
 neigh 1234:2::1 remote-as 2
 neigh 1234:2::1 label-pop
 neigh 1234:2::1 additional-path-tx lab
 neigh 1234:2::1 additional-path-tx lab
 red conn
 exit
int pweth1
 vrf for v1
 ipv4 addr 3.3.3.2 255.255.255.0
 pseudo v1 lo0 pweompls 2.2.2.1 1234
 exit
int pweth2
 vrf for v1
 ipv4 addr 3.3.4.2 255.255.255.0
 pseudo v1 lo0 pweompls 4321::1 1234
 exit

r1 tping 0 60 2.2.2.2 vrf v1 sou lo0
r1 tping 0 60 2.2.2.3 vrf v1 sou lo0
r1 tping 0 60 4321::2 vrf v1 sou lo0
r1 tping 0 60 4321::3 vrf v1 sou lo0
r2 tping 0 60 2.2.2.1 vrf v1 sou lo0
r2 tping 0 60 2.2.2.3 vrf v1 sou lo0
r2 tping 0 60 4321::3 vrf v1 sou lo0
r2 tping 0 60 4321::1 vrf v1 sou lo0
r3 tping 0 60 2.2.2.1 vrf v1 sou lo0
r3 tping 0 60 2.2.2.2 vrf v1 sou lo0
r3 tping 0 60 4321::1 vrf v1 sou lo0
r3 tping 0 60 4321::2 vrf v1 sou lo0
r1 tping 100 40 3.3.3.2 vrf v1
r3 tping 100 40 3.3.3.1 vrf v1
r1 tping 100 40 3.3.4.2 vrf v1
r3 tping 100 40 3.3.4.1 vrf v1
  1. Install ContainerLab as described here
  2. Fetch rout-bgp402 file
  3. Launch ContainerLab rout-bgp402.yml topology: 

   containerlab deploy --topo rout-bgp402.yml
4. Destroy ContainerLab rout-bgp402.yml topology: 

   containerlab destroy --topo rout-bgp402.yml
5. Copy-paste configuration for each node in the lab topology

  1. Fetch or compile freeRtr rtr.jar file.
    You can grab it here
  2. Fetch rout-bgp402.tst file here
  3. Launch rout-bgp402.tst test: 

   java -jar ../../rtr.jar test tester rout-bgp402 path ./ temp ./ wait
4. Destroy freeRtr rout-bgp402.tst test: 

   Ctrl-C (In freeRtr test window)