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Example: isis flexalgo

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r1

hostname r1
vrf def v1
 rd 1:1
 exit
vrf def v2
 rd 1:1
 exit
router isis4 1
 vrf v1
 net 48.4444.0000.1111.00
 segrout 10
 both segrout
 flexalgo 128 v2
 red conn
 exit
router isis6 1
 vrf v1
 net 48.6666.0000.1111.00
 segrout 10
 both segrout
 flexalgo 128 v2
 red conn
 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 1.1.1.1 255.255.255.0
 router isis4 1 ena
 exit
int eth2
 vrf for v1
 ipv6 addr 1234::1 ffff::
 router isis6 1 ena
 exit

r2

hostname r2
vrf def v1
 rd 1:1
 exit
vrf def v2
 rd 1:1
 exit
router isis4 1
 vrf v1
 net 48.4444.0000.2222.00
 segrout 10
 both segrout
 flexalgo 128 v2
 red conn
 exit
router isis6 1
 vrf v1
 net 48.6666.0000.2222.00
 segrout 10
 both segrout
 flexalgo 128 v2
 red conn
 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 1.1.1.2 255.255.255.0
 router isis4 1 ena
 exit
int eth2
 vrf for v1
 ipv6 addr 1234::2 ffff::
 router isis6 1 ena
 exit

r1 tping 100 20 2.2.2.2 vrf v1
r2 tping 100 20 2.2.2.1 vrf v1
r1 tping 100 20 4321::2 vrf v1
r2 tping 100 20 4321::1 vrf v1
r2 output show ipv4 isis 1 nei
r2 output show ipv6 isis 1 nei
r2 output show ipv4 isis 1 dat 2
r2 output show ipv6 isis 1 dat 2
r2 output show ipv4 isis 1 tre 2
r2 output show ipv6 isis 1 tre 2
r2 output show ipv4 route v1
r2 output show ipv6 route v1
r2 output show ipv4 route v2
r2 output show ipv6 route v2
  1. Install ContainerLab as described here
  2. Fetch rout-isis109 file
  3. Launch ContainerLab rout-isis109.yml topology: 

   containerlab deploy --topo rout-isis109.yml
4. Destroy ContainerLab rout-isis109.yml topology: 

   containerlab destroy --topo rout-isis109.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-isis109.tst file here
  3. Launch rout-isis109.tst test: 

   java -jar ../../rtr.jar test tester rout-isis109 path ./ temp ./ wait
4. Destroy freeRtr rout-isis109.tst test: 

   Ctrl-C (In freeRtr test window)