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Example: ldp over loopback

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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
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 lo1
 vrf for v1
 ipv4 addr 3.3.3.1 255.255.255.255
 ipv6 addr 3333::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 lo1
 mpls ldp6 lo1
 exit
ipv4 route v1 2.2.2.2 255.255.255.255 1.1.1.2
ipv4 route v1 3.3.3.2 255.255.255.255 1.1.1.2
ipv6 route v1 4321::2 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234::2
ipv6 route v1 3333::2 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 3.3.3.2 255.255.255.255
 ipv6 addr 3333::2 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 lo1
 mpls ldp6 lo1
 exit
ipv4 route v1 2.2.2.1 255.255.255.255 1.1.1.1
ipv4 route v1 3.3.3.1 255.255.255.255 1.1.1.1
ipv6 route v1 4321::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234::1
ipv6 route v1 3333::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234::1

r1 tping 100 10 2.2.2.2 vrf v1 sou lo0
r1 tping 100 10 4321::2 vrf v1 sou lo0
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
  1. Install ContainerLab as described here
  2. Fetch mpls-ldp11 file
  3. Launch ContainerLab mpls-ldp11.yml topology: 

   containerlab deploy --topo mpls-ldp11.yml
4. Destroy ContainerLab mpls-ldp11.yml topology: 

   containerlab destroy --topo mpls-ldp11.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-ldp11.tst file here
  3. Launch mpls-ldp11.tst test: 

   java -jar ../../rtr.jar test tester mpls-ldp11 path ./ temp ./ wait
4. Destroy freeRtr mpls-ldp11.tst test: 

   Ctrl-C (In freeRtr test window)