jumbov6 is a tool to assess IPv6 implementations with respect to attack vectors based on IPv6 jumbograms.
You can download it from the following link: https://packetstormsecurity.com/files/download/114508/jumbo6-v1.0.tar.gz
Source: https://packetstormsecurity.com/files/114508/IPv6-Jumbograms-Assessment-Tool-1.0.html