IRPAS is a suite of routing protocol attack tools which sends custom routing protocol packets from the unix command line. It is very useful for searching for new routing protocol vulnerabilities. Included is a tool for sending Cisco Discovery Protocol (CDP) messages, one for injecting IGRP routes, and a scanner for IGRP autonomous systems. Documentation available here.
6fd6dd1b5ca7eb5e3d6f2d12608a58741756eb2b080c577a322a31af1150b1ce