Example: nsh over ppp¶
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
int eth1
 nsh ena
 nsh xconn 2 255
 exit
int ser1
 enc ppp
 nsh ena
 exit
nsh 2 255 int ser1 0000.1111.2222
nsh 3 254 int eth1 0000.1111.2222 rawpack keephdr
r3
hostname r3
int ser1
 enc ppp
 nsh ena
 exit
int eth1
 nsh ena
 nsh xconn 3 255
 exit
nsh 3 255 int ser1 0000.1111.2222
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
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
- Install ContainerLab as described here
 - Fetch mpls-nsh05 file
 - Launch ContainerLab 
mpls-nsh05.ymltopology: 
   containerlab deploy --topo mpls-nsh05.yml  
mpls-nsh05.yml topology:  
   containerlab destroy --topo mpls-nsh05.yml