cmd_ifconfig += " txqueuelen %d" % (opt_txqueuelen,)
if opt_pointopoint is not None:
cmd_ifconfig += " pointopoint %s" % (opt_pointopoint,)
cmd_ifconfig += " txqueuelen %d" % (opt_txqueuelen,)
if opt_pointopoint is not None:
cmd_ifconfig += " pointopoint %s" % (opt_pointopoint,)