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Example: nsh over ipv4 tunnel

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r1

hostname r1
vrf def v1
 rd 1:1
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.1 255.255.255.0
 ipv6 addr 1111::1 ffff::
 exit

r2

hostname r2
vrf def v1
 rd 1:1
 exit
int eth1
 nsh ena
 nsh xconn 2 255
 exit
int ser1
 vrf for v1
 ipv4 addr 2.2.2.1 255.255.255.0
 ipv6 addr 2222::1 ffff:ffff::
 ipv4 nsh ena
 ipv6 nsh ena
 exit
nsh 2 255 tunnel v1 ser1 2.2.2.2
nsh 3 254 int eth1 0000.1111.2222 rawpack keephdr

r3

hostname r3
vrf def v1
 rd 1:1
 exit
int ser1
 vrf for v1
 ipv4 addr 2.2.2.2 255.255.255.0
 ipv6 addr 2222::2 ffff:ffff::
 ipv4 nsh ena
 ipv6 nsh ena
 exit
int eth1
 nsh ena
 nsh xconn 3 255
 exit
nsh 3 255 tunnel v1 ser1 2.2.2.1
nsh 2 254 int eth1 0000.1111.2222 rawpack keephdr

r4

hostname r4
vrf def v1
 rd 1:1
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.2 255.255.255.0
 ipv6 addr 1111::2 ffff::
 exit

r2 tping 100 10 2.2.2.2 vrf v1
r2 tping 100 10 2222::2 vrf v1
r3 tping 100 10 2.2.2.1 vrf v1
r3 tping 100 10 2222::1 vrf v1
r1 tping 100 10 1.1.1.2 vrf v1
r1 tping 100 10 1111::2 vrf v1
r4 tping 100 10 1.1.1.1 vrf v1
r4 tping 100 10 1111::1 vrf v1
  1. Install ContainerLab as described here
  2. Fetch mpls-nsh14 file
  3. Launch ContainerLab mpls-nsh14.yml topology: 

   containerlab deploy --topo mpls-nsh14.yml
4. Destroy ContainerLab mpls-nsh14.yml topology: 

   containerlab destroy --topo mpls-nsh14.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-nsh14.tst file here
  3. Launch mpls-nsh14.tst test: 

   java -jar ../../rtr.jar test tester mpls-nsh14 path ./ temp ./ wait
4. Destroy freeRtr mpls-nsh14.tst test: 

   Ctrl-C (In freeRtr test window)