-| | When Initialize L2 bridge domains with Vhost-User and VLAN in circular topology
-| | ... | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2} | ${subid}
-| | ... | ${tag_rewrite}
-| | ${vm1}= | And Configure guest VM with dpdk-testpmd connected via vhost-user
-| | ... | DUT1 | ${sock1} | ${sock2} | DUT1_VM1 | jumbo=${jumbo}
-| | ... | perf_qemu_qsz=${1024} | use_tuned_cfs=${False}
-| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
-| | ${vm2}= | And Configure guest VM with dpdk-testpmd connected via vhost-user
-| | ... | DUT2 | ${sock1} | ${sock2} | DUT2_VM1 | jumbo=${jumbo}
-| | ... | perf_qemu_qsz=${1024} | use_tuned_cfs=${False}
-| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | When Initialize layer driver | ${nic_driver}
+| | And Initialize layer interface
+| | And Initialize L2 bridge domains with Vhost-User and VLAN in circular topology
+| | ... | ${bd_id1} | ${bd_id2} | ${subid} | ${tag_rewrite}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${True} | vnf=testpmd_io