- multicast is udp based
- source address is always unicast address & never be multicast address.
- commands used are:
- sh ip mroute // show the multicast routing table
- sh ip multicast interface // shows multicast details for the interface
- clear ip mroute * // clear routes from the multicast routing table
- ip multicast-routing // globally enables multicast routing on router
- ip multicast-routing distributed // globally enables multicast routing on a 3560