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Example: ipv4-ipv6 protocol translation

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r1

hostname r1
vrf def v1
 rd 1:1
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.1 255.255.255.252
 exit
ipv4 route v1 0.0.0.0 0.0.0.0 1.1.1.2

r2

hostname r2
vrf def v1
 rd 1:1
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.2 255.255.255.252
 exit
int eth2
 vrf for v1
 ipv6 addr 1234::101:106 ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffc
 exit
int tun1
 tunnel vrf v1
 tunnel key 120
 tunnel mode 6to4
 tunnel source eth2
 tunnel destination 1234::101:101
 vrf for v1
 ipv4 addr 1.1.1.0 255.255.255.0
 ipv6 addr 1234::101:100 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ff00
 exit

r3

hostname r3
vrf def v1
 rd 1:1
 exit
int eth1
 vrf for v1
 ipv6 addr 1234::101:105 ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffc
 exit
ipv6 route v1 :: :: 1234::101:106

r2 tping 100 5 1.1.1.1 vrf v1
r2 tping 100 5 1234::101:105 vrf v1
r1 tping 100 5 1.1.1.5 vrf v1
r3 tping 100 5 1234::101:101 vrf v1
  1. Install ContainerLab as described here
  2. Fetch crypt-nat07 file
  3. Launch ContainerLab crypt-nat07.yml topology: 

   containerlab deploy --topo crypt-nat07.yml
4. Destroy ContainerLab crypt-nat07.yml topology: 

   containerlab destroy --topo crypt-nat07.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 crypt-nat07.tst file here
  3. Launch crypt-nat07.tst test: 

   java -jar ../../rtr.jar test tester crypt-nat07 path ./ temp ./ wait
4. Destroy freeRtr crypt-nat07.tst test: 

   Ctrl-C (In freeRtr test window)