Example: bridge hairpin

TopologyConfigurationsVerificationEmulation

r1

hostname r1
vrf def v1
 rd 1:1
 exit
hairpin 1
 exit
bridge 1
 exit
int hairpin11
 vrf for v1
 ipv4 addr 1.1.1.1 255.255.255.0
 ipv6 addr 1234::1 ffff::
 exit
int hairpin12
 bridge-gr 1
 exit
int eth1
 bridge-gr 1
 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

r1 tping 100 5 1.1.1.2 vrf v1
r2 tping 100 5 1.1.1.1 vrf v1
r1 tping 100 5 1234::2 vrf v1
r2 tping 100 5 1234::1 vrf v1

ContainerLabfreeRtr CLI

1. Install ContainerLab as described here
2. Fetch conn-hairpin04 file
3. Launch ContainerLab conn-hairpin04.yml topology:

   containerlab deploy --topo conn-hairpin04.yml  

4. Destroy ContainerLab conn-hairpin04.yml topology:

   containerlab destroy --topo conn-hairpin04.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-hairpin04.tst file here
3. Launch conn-hairpin04.tst test:

   java -jar ../../rtr.jar test tester conn-hairpin04 path ./ temp ./ wait

4. Destroy freeRtr conn-hairpin04.tst test:

   Ctrl-C (In freeRtr test window)