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Example: ingress label filtering with ldp

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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 all 4321:: ffff:: all 4321:: ffff:: all
 permit all any all any all
 exit
prefix-list p4
 sequence 10 deny 2.2.2.3/32
 sequence 20 permit 0.0.0.0/0 le 32
 exit
prefix-list p6
 sequence 10 deny 4321::3/128
 sequence 20 permit ::/0 le 128
 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 1.1.1.1 255.255.255.0
 ipv6 addr 1234::1 ffff::
 ipv4 access-group-in test4
 ipv6 access-group-in test6
 no ipv4 unreachables
 no ipv6 unreachables
 mpls enable
 mpls ldp4
 mpls ldp6
 mpls label4in p4
 mpls label6in p6
 exit
ipv4 route v1 2.2.2.2 255.255.255.255 1.1.1.2
ipv6 route v1 4321::2 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234::2
ipv4 route v1 2.2.2.3 255.255.255.255 1.1.1.2
ipv6 route v1 4321::3 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234::2
ipv4 route v1 2.2.2.4 255.255.255.255 1.1.1.2
ipv6 route v1 4321::4 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234::2

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 all 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 lo1
 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 lo2
 vrf for v1
 ipv4 addr 2.2.2.4 255.255.255.255
 ipv6 addr 4321::4 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.2 255.255.255.0
 ipv6 addr 1234::2 ffff::
 ipv4 access-group-in test4
 ipv6 access-group-in test6
 no ipv4 unreachables
 no ipv6 unreachables
 mpls enable
 mpls ldp4
 mpls ldp6
 exit
ipv4 route v1 2.2.2.1 255.255.255.255 1.1.1.1
ipv6 route v1 4321::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234::1

r2 tping 100 10 2.2.2.1 vrf v1 sou lo0
r2 tping 100 10 4321::1 vrf v1 sou lo0
r1 tping 0 10 1.1.1.2 vrf v1
r2 tping 0 10 1.1.1.1 vrf v1
r1 tping 100 10 2.2.2.2 vrf v1 sou lo0
r1 tping 100 10 4321::2 vrf v1 sou lo0
r1 tping 0 10 2.2.2.3 vrf v1 sou lo0
r1 tping 0 10 4321::3 vrf v1 sou lo0
r1 tping 100 10 2.2.2.4 vrf v1 sou lo0
r1 tping 100 10 4321::4 vrf v1 sou lo0
  1. Install ContainerLab as described here
  2. Fetch mpls-ldp20 file
  3. Launch ContainerLab mpls-ldp20.yml topology: 

   containerlab deploy --topo mpls-ldp20.yml
4. Destroy ContainerLab mpls-ldp20.yml topology: 

   containerlab destroy --topo mpls-ldp20.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 mpls-ldp20.tst file here
  3. Launch mpls-ldp20.tst test: 

   java -jar ../../rtr.jar test tester mpls-ldp20 path ./ temp ./ wait
4. Destroy freeRtr mpls-ldp20.tst test: 

   Ctrl-C (In freeRtr test window)