for l in range(1, parallel_links*2, 2):
tg_if1_adj_addr = topology[f"TG_pf{l+1}_mac"][0]
tg_if2_adj_addr = topology[f"TG_pf{l}_mac"][0]
- if osi_layer in ("L3", "L7"):
+ if osi_layer in ("L3", "L7") and "DUT1" in topology.keys():
ifl = BuiltIn().get_variable_value("${int}")
last = topology["duts_count"]
tg_if1_adj_addr = Topology().get_interface_mac(