ndpmon binary package in Ubuntu Trusty arm64

 NDPMon, IPv6 Neighbor Discovery Protocol Monitor, is a tool working
 with ICMPv6 packets. NDPMon observes the local network to see
 if nodes using Neighbor Discovery messages behave properly.
 When it detects a suspicious Neighbor Discovery message, it
 notifies the administrator by writing in the syslog and in some
 cases by sending an email report. NDPMon is an equivalent of
 ArpWatch for IPv6.

Source package