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]
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]