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Example: udp forwarder server

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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::
 exit
int tun1
 tun vrf v1
 tun sou eth1
 tun dest 1.1.1.2
 tun key 4321
 tun mod pckoudp
 vrf for v1
 ipv4 addr 3.3.3.1 255.255.255.0
 ipv6 addr 3333::1 ffff::
 exit

r2

hostname r2
vrf def v1
 rd 1:1
 exit
vrf def v2
 rd 1:1
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.2 255.255.255.0
 ipv6 addr 1234::2 ffff::
 exit
int eth2
 vrf for v2
 ipv4 addr 2.2.2.2 255.255.255.0
 ipv6 addr 4321::2 ffff::
 exit
server udpfwd fwd
 port 1234
 target vrf v1
 target address 1.1.1.1
 target port 4321
 vrf v2
 exit

r3

hostname r3
vrf def v1
 rd 1:1
 exit
int eth1
 vrf for v1
 ipv4 addr 2.2.2.3 255.255.255.0
 ipv6 addr 4321::3 ffff::
 exit
int tun1
 tun vrf v1
 tun sou eth1
 tun dest 2.2.2.2
 tun key 1234
 tun mod pckoudp
 vrf for v1
 ipv4 addr 3.3.3.2 255.255.255.0
 ipv6 addr 3333::2 ffff::
 exit

r2 tping 100 15 1.1.1.1 vrf v1
r2 tping 100 15 2.2.2.3 vrf v2
r3 tping 100 15 3.3.3.1 vrf v1
r3 tping 100 15 3333::1 vrf v1
  1. Install ContainerLab as described here
  2. Fetch serv-udpforward file
  3. Launch ContainerLab serv-udpforward.yml topology: 

   containerlab deploy --topo serv-udpforward.yml
4. Destroy ContainerLab serv-udpforward.yml topology: 

   containerlab destroy --topo serv-udpforward.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 serv-udpforward.tst file here
  3. Launch serv-udpforward.tst test: 

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

   Ctrl-C (In freeRtr test window)