if tunnel_src and tunnel_dst else u""
conf = f"exec ipsec sa add {sad_id + i} esp spi {spi + i} "\
f"crypto-alg {crypto_alg.alg_name} " \
if tunnel_src and tunnel_dst else u""
conf = f"exec ipsec sa add {sad_id + i} esp spi {spi + i} "\
f"crypto-alg {crypto_alg.alg_name} " \