ndisc6 consists of three command line tools (ndisc6, rdisc6, and traceroute6) that perform ICMPv6 Neighbor Discovery, ICMPv6 Router Discovery, and IPv6 tcptraceroute/traceroute respectively. It is primarily meant for IPv6 networking diagnostics and monitoring.
You can download it from the following link: https://packetstormsecurity.com/files/download/50649/ndisc6-0.7.1.tar.bz2
Source: https://packetstormsecurity.com/files/50649/ndisc6-0.7.1.tar.bz2.html