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Example: ipv4 in esp over ipv4 filtered

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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 1234::1 ffff::
 mpls srv6-secur
 exit
crypto ipsec ips
 group 02
 cipher des
 hash md5
 seconds 3600
 bytes 1024000
 key tester
 role static
 isakmp 1
 protected ipv4
 exit
int tun1
 tunnel vrf v1
 tunnel prot ips
 tunnel mode ipsec
 tunnel source ethernet1
 tunnel destination 1.1.1.2
 vrf for v1
 ipv4 addr 2.2.2.1 255.255.255.0
 ipv6 addr 4321::1 ffff::
 exit

r2

hostname r2
vrf def v1
 rd 1:1
 exit
crypto ipsec ips
 group 02
 cipher des
 hash md5
 seconds 3600
 bytes 1024000
 key tester
 role static
 isakmp 1
 protected ipv4
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.2 255.255.255.0
 ipv6 addr 1234::2 ffff::
 mpls srv6-secur
 exit
int tun1
 tunnel vrf v1
 tunnel prot ips
 tunnel mode ipsec
 tunnel source ethernet1
 tunnel destination 1.1.1.1
 vrf for v1
 ipv4 addr 2.2.2.2 255.255.255.0
 ipv6 addr 4321::2 ffff::
 exit

r1 tping 100 5 2.2.2.2 vrf v1
r2 tping 100 5 2.2.2.1 vrf v1
r1 tping 0 5 4321::2 vrf v1
r2 tping 0 5 4321::1 vrf v1
  1. Install ContainerLab as described here
  2. Fetch crypt-acl84 file
  3. Launch ContainerLab crypt-acl84.yml topology: 

   containerlab deploy --topo crypt-acl84.yml
4. Destroy ContainerLab crypt-acl84.yml topology: 

   containerlab destroy --topo crypt-acl84.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-acl84.tst file here
  3. Launch crypt-acl84.tst test: 

   java -jar ../../rtr.jar test tester crypt-acl84 path ./ temp ./ wait
4. Destroy freeRtr crypt-acl84.tst test: 

   Ctrl-C (In freeRtr test window)