-| | ${bd_id2}= | Evaluate | ${nf_nodes}+1
-| | Add interface to bridge domain | ${nodes['${dut}']} | ${${dut}_if1} | ${1}
-| | Add interface to bridge domain | ${nodes['${dut}']} | ${${dut}_if2}
+| | ${bd_id1}= | Evaluate | ${nf_nodes} * (${nf_chain} - 1) + ${nf_chain}
+| | ${bd_id2}= | Evaluate | ${nf_nodes} * ${nf_chain} + ${nf_chain}
+| | ${dut_str}= | Convert To Lowercase | ${dut}
+| | Add interface to bridge domain
+| | ... | ${nodes['${dut}']} | ${${dut_str}_${prev_layer}_${nf_chain}_1}
+| | ... | ${bd_id1}
+| | Add interface to bridge domain
+| | ... | ${nodes['${dut}']} | ${${dut_str}_${prev_layer}_${nf_chain}_2}