diff --git a/hackfest/containerlab/srl1.cli b/hackfest/containerlab/srl1.cli
new file mode 100644
index 0000000000000000000000000000000000000000..fd7144ca7633e0d37b996ca04a9d55f160ce4041
--- /dev/null
+++ b/hackfest/containerlab/srl1.cli
@@ -0,0 +1,14 @@
+set / interface ethernet-1/2 admin-state enable
+set / interface ethernet-1/2 subinterface 0 admin-state enable
+set / interface ethernet-1/2 subinterface 0 ipv4 address 172.16.1.1/24
+
+set / interface ethernet-1/1 admin-state enable
+set / interface ethernet-1/1 subinterface 0 admin-state enable
+set / interface ethernet-1/1 subinterface 0 ipv4 address 172.0.0.1/30
+
+set / network-instance default
+set / network-instance default interface ethernet-1/1.0
+set / network-instance default interface ethernet-1/2.0
+
+set / network-instance default next-hop-groups group group1 nexthop 1 ip-address 172.0.0.2 admin-state enable
+set / network-instance default static-routes route 172.16.2.0/24 next-hop-group group1 admin-state enable
\ No newline at end of file
diff --git a/hackfest/containerlab/srl2.cli b/hackfest/containerlab/srl2.cli
new file mode 100644
index 0000000000000000000000000000000000000000..395d53c711814c2cb9656b19cc3c101c90732bd8
--- /dev/null
+++ b/hackfest/containerlab/srl2.cli
@@ -0,0 +1,14 @@
+set / interface ethernet-1/2 admin-state enable
+set / interface ethernet-1/2 subinterface 0 admin-state enable
+set / interface ethernet-1/2 subinterface 0 ipv4 address 172.16.2.1/24
+
+set / interface ethernet-1/1 admin-state enable
+set / interface ethernet-1/1 subinterface 0 admin-state enable
+set / interface ethernet-1/1 subinterface 0 ipv4 address 172.0.0.2/30
+
+set / network-instance default
+set / network-instance default interface ethernet-1/1.0
+set / network-instance default interface ethernet-1/2.0
+
+set /network-instance default next-hop-groups group group1 nexthop 1 ip-address 172.0.0.1 admin-state enable
+set /network-instance default static-routes route 172.16.1.0/24 next-hop-group group1 admin-state enable
\ No newline at end of file
diff --git a/hackfest/containerlab/tfs-scenario.clab.yml b/hackfest/containerlab/tfs-scenario.clab.yml
index f79378757827ff706be849b03277b947ee85f7fb..91467d2b9bfec7e9fd2da4af7160b151380d38dd 100644
--- a/hackfest/containerlab/tfs-scenario.clab.yml
+++ b/hackfest/containerlab/tfs-scenario.clab.yml
@@ -24,7 +24,7 @@ mgmt:
 topology:
   kinds:
     srl:
-      image: ghcr.io/nokia/srlinux:23.3.1
+      image: ghcr.io/nokia/srlinux:21.11.3
     linux:
       image: ghcr.io/hellt/network-multitool
   nodes:
@@ -34,24 +34,30 @@ topology:
       cpu: 0.5
       memory: 1GB
       mgmt-ipv4: 172.100.100.101
-      #startup-config: srl1.cli
+      startup-config: ./srl1.cli
     srl2:
       kind: srl
       type: ixr6
       cpu: 0.5
       memory: 1GB
       mgmt-ipv4: 172.100.100.102
-      #startup-config: srl2.cli
+      startup-config: ./srl2.cli
     client1:
       kind: linux
       cpu: 0.1
       memory: 100MB
       mgmt-ipv4: 172.100.100.201
+      exec:
+        - ip address add 172.16.1.10/24 dev eth1
+        - ip route add 172.16.2.0/24 via 172.16.1.1
     client2:
       kind: linux
       cpu: 0.1
       memory: 100MB
       mgmt-ipv4: 172.100.100.202
+      exec:
+        - ip address add 172.16.2.10/24 dev eth1
+        - ip route add 172.16.1.0/24 via 172.16.2.1
 
   links:
     - endpoints: ["srl1:e1-1", "srl2:e1-1"]