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Example: policy routing with nexthop

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r1

hostname r1
vrf def v1
 rd 1:1
 exit
int lo0
 vrf for v1
 ipv4 addr 2.2.2.101 255.255.255.255
 ipv6 addr 4321::101 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.1 255.255.255.252
 ipv6 addr 1234:1::1 ffff:ffff::
 exit
access-list a2b4
 permit all 2.2.2.101 255.255.255.255 all 2.2.2.201 255.255.255.255 all
 exit
access-list a2b6
 permit all 4321::101 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff all 4321::201 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff all
 exit
ipv4 pbr v1 a2b4 v1 next 1.1.1.2
ipv6 pbr v1 a2b6 v1 next 1234:1::2

r2

hostname r2
vrf def v1
 rd 1:1
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.2 255.255.255.252
 ipv6 addr 1234:1::2 ffff:ffff::
 exit
int eth2
 vrf for v1
 ipv4 addr 1.1.1.6 255.255.255.252
 ipv6 addr 1234:2::2 ffff:ffff::
 exit
access-list a2b4
 permit all 2.2.2.101 255.255.255.255 all 2.2.2.201 255.255.255.255 all
 exit
access-list b2a4
 permit all 2.2.2.201 255.255.255.255 all 2.2.2.101 255.255.255.255 all
 exit
access-list a2b6
 permit all 4321::101 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff all 4321::201 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff all
 exit
access-list b2a6
 permit all 4321::201 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff all 4321::101 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff all
 exit
ipv4 pbr v1 a2b4 v1 next 1.1.1.5
ipv6 pbr v1 a2b6 v1 next 1234:2::1
ipv4 pbr v1 b2a4 v1 next 1.1.1.1
ipv6 pbr v1 b2a6 v1 next 1234:1::1

r3

hostname r3
vrf def v1
 rd 1:1
 exit
int lo0
 vrf for v1
 ipv4 addr 2.2.2.201 255.255.255.255
 ipv6 addr 4321::201 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.5 255.255.255.252
 ipv6 addr 1234:2::1 ffff:ffff::
 exit
access-list b2a4
 permit all 2.2.2.201 255.255.255.255 all 2.2.2.101 255.255.255.255 all
 exit
access-list b2a6
 permit all 4321::201 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff all 4321::101 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff all
 exit
ipv4 pbr v1 b2a4 v1 next 1.1.1.6
ipv6 pbr v1 b2a6 v1 next 1234:2::2

r1 tping 100 5 2.2.2.201 vrf v1 sou lo0
r1 tping 100 5 4321::201 vrf v1 sou lo0
r3 tping 100 5 2.2.2.101 vrf v1 sou lo0
r3 tping 100 5 4321::101 vrf v1 sou lo0
r1 tping 0 5 2.2.2.201 vrf v1
r1 tping 0 5 4321::201 vrf v1
r3 tping 0 5 2.2.2.101 vrf v1
r3 tping 0 5 4321::101 vrf v1
r2 output show ipv4 pbr v1
r2 output show ipv6 pbr v1
output ../binTmp/rout-pbr.html
<html><body bgcolor="#000000" text="#FFFFFF" link="#00FFFF" vlink="#00FFFF" alink="#00FFFF">
here are the ipv4 forwarding:
here are the ipv6 forwarding:
  1. Install ContainerLab as described here
  2. Fetch rout-pbr01 file
  3. Launch ContainerLab rout-pbr01.yml topology: 

   containerlab deploy --topo rout-pbr01.yml
4. Destroy ContainerLab rout-pbr01.yml topology: 

   containerlab destroy --topo rout-pbr01.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 rout-pbr01.tst file here
  3. Launch rout-pbr01.tst test: 

   java -jar ../../rtr.jar test tester rout-pbr01 path ./ temp ./ wait
4. Destroy freeRtr rout-pbr01.tst test: 

   Ctrl-C (In freeRtr test window)