Example: forwarder server

TopologyConfigurationsVerificationEmulation

r1

hostname r1
vrf def v1
 rd 1:1
 exit
int lo0
 vrf for v1
 ipv4 addr 2.2.2.2 255.255.255.255
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.1 255.255.255.0
 ipv6 addr 1234::1 ffff::
 exit
server telnet tel
 vrf v1
 port 6666
 exit

r2

hostname r2
vrf def v1
 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 v1
 ipv4 addr 2.2.2.2 255.255.255.0
 ipv6 addr 4321::2 ffff::
 exit
server forwarder fwd
 port 666
 target vrf v1
 target address 1.1.1.1
 target protocol tcp
 target port 6666
 vrf v1
 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

r2 tping 100 15 1.1.1.1 vrf v1
r2 tping 100 15 2.2.2.3 vrf v1
r3 send telnet 2.2.2.2 666 vrf v1
r3 tping 100 15 2.2.2.2 vrf v1

ContainerLabfreeRtr CLI

1. Install ContainerLab as described here
2. Fetch serv-forward file
3. Launch ContainerLab serv-forward.yml topology:

   containerlab deploy --topo serv-forward.yml  

4. Destroy ContainerLab serv-forward.yml topology:

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

   java -jar ../../rtr.jar test tester serv-forward path ./ temp ./ wait

4. Destroy freeRtr serv-forward.tst test:

   Ctrl-C (In freeRtr test window)