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Example: ppp over l2tp2

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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 lo0
 vrf for v1
 ipv4 addr 4.4.4.4 255.255.255.255
 exit
ipv4 pool p4 2.2.2.1 0.0.0.1 254
int di1
 enc ppp
 vrf for v1
 ipv4 addr 2.2.2.0 255.255.255.255
 ppp ip4cp local 2.2.2.0
 ipv4 pool p4
 ppp ip4cp open
 exit
server l2tp2 l2tp
 clone di1
 vrf v1
 exit

r2

hostname r2
vrf def v1
 rd 1:1
 exit
proxy-profile p1
 vrf v1
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.2 255.255.255.0
 ipv6 addr 1234::2 ffff::
 exit
prefix-list p1
 permit 0.0.0.0/0
 exit
int di1
 vrf for v1
 ipv4 addr 3.3.3.3 255.255.255.128
 ppp ip4cp open
 ppp ip4cp local 0.0.0.0
 ipv4 gateway-prefix p1
 exit
vpdn l2tp
 int di1
 proxy p1
 tar 1.1.1.1
 called 1234
 calling 4321
 dir in
 prot l2tp2
 exit

r2 tping 100 60 2.2.2.0 vrf v1
r2 tping 100 60 4.4.4.4 vrf v1
r2 output show inter dia1 full
output ../binTmp/conn-l2tp.html
<html><body bgcolor="#000000" text="#FFFFFF" link="#00FFFF" vlink="#00FFFF" alink="#00FFFF">
here is the interface:
  1. Install ContainerLab as described here
  2. Fetch conn-l2tp01 file
  3. Launch ContainerLab conn-l2tp01.yml topology: 

   containerlab deploy --topo conn-l2tp01.yml
4. Destroy ContainerLab conn-l2tp01.yml topology: 

   containerlab destroy --topo conn-l2tp01.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 conn-l2tp01.tst file here
  3. Launch conn-l2tp01.tst test: 

   java -jar ../../rtr.jar test tester conn-l2tp01 path ./ temp ./ wait
4. Destroy freeRtr conn-l2tp01.tst test: 

   Ctrl-C (In freeRtr test window)