WHAT TO EXPECT
In this section, we will go into detail about Source Specific Multicast, or SSM, and how it improves security when sending/receiving multicast packets.
Source Specific Multicast, or SSM, as defined by IGMPv3, is a method for delivering multicast packets in which the only packets that are delivered to the receiver are those originating from a specific source address requested by the receiver. Not only does this improve security within the cloudSwXtch but it also alleviates strain on the network since the sender will know to only send a multicast stream from the specified single source and not via other source addresses.
This feature can be tested using swxtch-perf, a cloudSwXtch-based tool for simulating consumer and producer traffic, as well as external applications that support SSM. For more information on using it for SSM, please see the swxtch-perf article under Testing cloudSwXtch.