-| | When Initialize IPv4 forwarding with vhost in 2-node circular topology
-| | ... | vm_count=${1}
-| | And Configure guest VMs with dpdk-testpmd-mac connected via vhost-user
-| | ... | vm_count=${1} | jumbo=${jumbo} | perf_qemu_qsz=${1024}
-| | ... | use_tuned_cfs=${False}
+| | When Initialize layer driver | ${nic_driver}
+| | And Initialize layer interface
+| | And Initialize IPv4 forwarding with vhost in 2-node circular topology
+| | ... | nf_nodes=${nf_nodes} | testpmd_mac=${TRUE}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${True} | vnf=testpmd_mac