NDPMon
NDPMon - Neighbor Discovery Protocol Monitor
..., NDPMon is an equivalent of Arpwatch for IPv4, and has similar basic features with added attacks detection.
NDPMon also maintains up-to-date a list of neighbors on the link and watches all advertisements and changes. It permits to track the usage of cryptographically generated interface identifiers or temporary global addresses when Privacy extensions are enable (default behavior in Ubuntu and Windows for example).