Skip to content

Example: babel egress route filtering with routemap

Alt text

r1

hostname r1
vrf def v1
 rd 1:1
 exit
router babel4 1
 vrf v1
 router 1111-2222-3333-0001
 red conn
 exit
router babel6 1
 vrf v1
 router 1111-2222-3333-0001
 red conn
 exit
int lo0
 vrf for v1
 ipv4 addr 2.2.2.1 255.255.255.255
 ipv6 addr 4321::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 exit
int lo1
 vrf for v1
 ipv4 addr 2.2.2.11 255.255.255.255
 ipv6 addr 4321::11 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 exit
int lo2
 vrf for v1
 ipv4 addr 2.2.2.21 255.255.255.255
 ipv6 addr 4321::21 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 exit
route-map p4
 sequence 10 act deny
  match network 2.2.2.11/32
 sequence 20 act perm
  match network 0.0.0.0/0 le 32
 exit
route-map p6
 sequence 10 act deny
  match network 4321::11/128
 sequence 20 act perm
  match network ::/0 le 128
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.1 255.255.255.252
 ipv6 addr 1234:1::1 ffff:ffff::
 router babel4 1 ena
 router babel6 1 ena
 router babel4 1 route-map-out p4
 router babel6 1 route-map-out p6
 exit

r2

hostname r2
vrf def v1
 rd 1:1
 exit
router babel4 1
 vrf v1
 router 1111-2222-3333-0002
 red conn
 exit
router babel6 1
 vrf v1
 router 1111-2222-3333-0002
 red conn
 exit
int lo0
 vrf for v1
 ipv4 addr 2.2.2.2 255.255.255.255
 ipv6 addr 4321::2 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 exit
int lo1
 vrf for v1
 ipv4 addr 2.2.2.12 255.255.255.255
 ipv6 addr 4321::12 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 exit
int lo2
 vrf for v1
 ipv4 addr 2.2.2.22 255.255.255.255
 ipv6 addr 4321::22 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.2 255.255.255.252
 ipv6 addr 1234:1::2 ffff:ffff::
 router babel4 1 ena
 router babel6 1 ena
 exit

r1 tping 100 130 2.2.2.2 vrf v1
r1 tping 100 130 4321::2 vrf v1
r1 tping 100 130 2.2.2.12 vrf v1
r1 tping 100 130 4321::12 vrf v1
r1 tping 100 130 2.2.2.22 vrf v1
r1 tping 100 130 4321::22 vrf v1
r2 tping 100 130 2.2.2.1 vrf v1
r2 tping 100 130 4321::1 vrf v1
r2 tping 0 130 2.2.2.11 vrf v1
r2 tping 0 130 4321::11 vrf v1
r2 tping 100 130 2.2.2.21 vrf v1
r2 tping 100 130 4321::21 vrf v1
r2 output show ipv4 babel 1 sum
r2 output show ipv6 babel 1 sum
r2 output show ipv4 babel 1 dat
r2 output show ipv6 babel 1 dat
r2 output show ipv4 route v1
r2 output show ipv6 route v1
  1. Install ContainerLab as described here
  2. Fetch rout-babel06 file
  3. Launch ContainerLab rout-babel06.yml topology: 

   containerlab deploy --topo rout-babel06.yml
4. Destroy ContainerLab rout-babel06.yml topology: 

   containerlab destroy --topo rout-babel06.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-babel06.tst file here
  3. Launch rout-babel06.tst test: 

   java -jar ../../rtr.jar test tester rout-babel06 path ./ temp ./ wait
4. Destroy freeRtr rout-babel06.tst test: 

   Ctrl-C (In freeRtr test window)