Skip to content

Example: ospf change in tag

Alt text

r1

hostname r1
vrf def v1
 rd 1:1
 exit
route-map rm1
 set tag 1000
 exit
router ospf4 1
 vrf v1
 router 4.4.4.1
 area 0 ena
 red conn route-map rm1
 exit
router ospf6 1
 vrf v1
 router 6.6.6.1
 area 0 ena
 red conn route-map rm1
 exit
int lo1
 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 eth1
 vrf for v1
 ipv4 addr 1.1.1.1 255.255.255.252
 ipv6 addr 1234:1::1 ffff:ffff::
 router ospf4 1 ena
 router ospf6 1 ena
 exit

r2

hostname r2
vrf def v1
 rd 1:1
 exit
route-map rm1
 sequence 10 act deny
 sequence 10 match tag 2000-4000
 sequence 20 act perm
 exit
router ospf4 1
 vrf v1
 router 4.4.4.2
 area 0 ena
 red conn
 area 0 route-map-from rm1
 exit
router ospf6 1
 vrf v1
 router 6.6.6.2
 area 0 ena
 red conn
 area 0 route-map-from rm1
 exit
int lo1
 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 eth1
 vrf for v1
 ipv4 addr 1.1.1.2 255.255.255.252
 ipv6 addr 1234:1::2 ffff:ffff::
 router ospf4 1 ena
 router ospf6 1 ena
 exit
int eth2
 vrf for v1
 ipv4 addr 1.1.1.5 255.255.255.252
 ipv6 addr 1234:2::1 ffff:ffff::
 router ospf4 1 ena
 router ospf6 1 ena
 exit

r3

hostname r3
vrf def v1
 rd 1:1
 exit
router ospf4 1
 vrf v1
 router 4.4.4.3
 area 0 ena
 red conn
 exit
router ospf6 1
 vrf v1
 router 6.6.6.3
 area 0 ena
 red conn
 exit
int lo1
 vrf for v1
 ipv4 addr 2.2.2.3 255.255.255.255
 ipv6 addr 4321::3 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.6 255.255.255.252
 ipv6 addr 1234:2::2 ffff:ffff::
 router ospf4 1 ena
 router ospf6 1 ena
 exit

r1 tping 100 40 2.2.2.2 vrf v1
r1 tping 100 40 2.2.2.3 vrf v1
r1 tping 100 40 4321::2 vrf v1
r1 tping 100 40 4321::3 vrf v1
r2 tping 100 40 2.2.2.1 vrf v1
r2 tping 100 40 2.2.2.3 vrf v1
r2 tping 100 40 4321::1 vrf v1
r2 tping 100 40 4321::3 vrf v1
r3 tping 100 40 2.2.2.1 vrf v1
r3 tping 100 40 2.2.2.2 vrf v1
r3 tping 100 40 4321::1 vrf v1
r3 tping 100 40 4321::2 vrf v1
r1 send conf t
r1 send route-map rm1
r1 send set tag 3000
r1 send end
r1 send clear ipv4 route v1
r1 send clear ipv6 route v1
r1 tping 100 40 2.2.2.2 vrf v1
r1 tping 100 40 2.2.2.3 vrf v1
r1 tping 100 40 4321::2 vrf v1
r1 tping 100 40 4321::3 vrf v1
r2 tping 0 40 2.2.2.1 vrf v1
r2 tping 100 40 2.2.2.3 vrf v1
r2 tping 0 40 4321::1 vrf v1
r2 tping 100 40 4321::3 vrf v1
r3 tping 0 40 2.2.2.1 vrf v1
r3 tping 100 40 2.2.2.2 vrf v1
r3 tping 0 40 4321::1 vrf v1
r3 tping 100 40 4321::2 vrf v1
r1 send conf t
r1 send route-map rm1
r1 send set tag 5000
r1 send end
r1 send clear ipv4 route v1
r1 send clear ipv6 route v1
r1 tping 100 40 2.2.2.2 vrf v1
r1 tping 100 40 2.2.2.3 vrf v1
r1 tping 100 40 4321::2 vrf v1
r1 tping 100 40 4321::3 vrf v1
r2 tping 100 40 2.2.2.1 vrf v1
r2 tping 100 40 2.2.2.3 vrf v1
r2 tping 100 40 4321::1 vrf v1
r2 tping 100 40 4321::3 vrf v1
r3 tping 100 40 2.2.2.1 vrf v1
r3 tping 100 40 2.2.2.2 vrf v1
r3 tping 100 40 4321::1 vrf v1
r3 tping 100 40 4321::2 vrf v1
r2 output show ipv4 ospf 1 nei
r2 output show ipv6 ospf 1 nei
r2 output show ipv4 ospf 1 dat 0
r2 output show ipv6 ospf 1 dat 0
r2 output show ipv4 ospf 1 tre 0
r2 output show ipv6 ospf 1 tre 0
r2 output show ipv4 route v1
r2 output show ipv6 route v1
  1. Install ContainerLab as described here
  2. Fetch rout-ospf33 file
  3. Launch ContainerLab rout-ospf33.yml topology: 

   containerlab deploy --topo rout-ospf33.yml
4. Destroy ContainerLab rout-ospf33.yml topology: 

   containerlab destroy --topo rout-ospf33.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-ospf33.tst file here
  3. Launch rout-ospf33.tst test: 

   java -jar ../../rtr.jar test tester rout-ospf33 path ./ temp ./ wait
4. Destroy freeRtr rout-ospf33.tst test: 

   Ctrl-C (In freeRtr test window)