This is a write up of an issue which I experienced on one of my networks. It is in response to When Good NICs Do Bad Things: A Blast of IPv6 Multicast Listener Discovery Queries posted on packetpushers.net.
Using SaltStack to run distributed monitoring checks is fun, but what is really awesome is writing the result of all those checks to CouchDB. Instead of returning the result of the check to the command line, or to the master even via programmatic method, you can use SaltStack's returners to have the output returned somewhere else.