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Example: nsh over gre

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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 eth2
 vrf for v1
 ipv6 addr 1111::1 ffff::
 exit
int tun1
 tunnel vrf v1
 tunnel mode gre
 tunnel source eth2
 tunnel destination 1111::2
 nsh ena
 exit
nsh 2 255 int tun1 0000.1111.2222
nsh 3 254 int eth1 0000.1111.2222 rawpack keephdr

r3

hostname r3
vrf def v1
 rd 1:1
 exit
int eth1
 vrf for v1
 ipv6 addr 1111::2 ffff::
 exit
int tun1
 tunnel vrf v1
 tunnel mode gre
 tunnel source eth1
 tunnel destination 1111::1
 nsh ena
 exit
int eth2
 nsh ena
 nsh xconn 3 255
 exit
nsh 3 255 int tun1 0000.1111.2222
nsh 2 254 int eth2 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

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-nsh08 file
  3. Launch ContainerLab mpls-nsh08.yml topology: 

   containerlab deploy --topo mpls-nsh08.yml
4. Destroy ContainerLab mpls-nsh08.yml topology: 

   containerlab destroy --topo mpls-nsh08.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-nsh08.tst file here
  3. Launch mpls-nsh08.tst test: 

   java -jar ../../rtr.jar test tester mpls-nsh08 path ./ temp ./ wait
4. Destroy freeRtr mpls-nsh08.tst test: 

   Ctrl-C (In freeRtr test window)