o change the behavior:

iface: a specific interface (e.g. "eth0") of the system on which the
     DoS should be launched. If None is provided conf.iface is used.

mac_src_filter: a mac address (e.g "00:13:72:8c:b5:69") to filter on.
     Only NS messages received from this source will trigger replies.
     This allows limiting the effects of the DoS to a single target by
     filtering on its mac address. The default value is None: the DoS
     is not limited to a specific mac address.

tgt_filter: Same as previous but for a specific target IPv6 address for
     received NS. If the target address in the NS message (not the IPv6
     destination address) matches that address, then a fake reply will
     be sent, i.e. the emitter will be a target of the DoS.

reply_mac: allow specifying a specific source mac address for the reply,
     i.e. to prevent the use of the mac address of the interface.
c