The Idem with Multicast Packets test will first create three groups of port combinations. The first group will have both ports be capable of receiving a packet. The second group will have one port be open to receive a packet and one be closed. The third group will have both ports be closed. Each of the ports will be pinged to ensure that they are reachable. Afterwards, a packet will be generated and sent to each of these groups, and it will ensure that the correct behavior of a failed or successful delivery occurs on each port. 

Let me know if there are any comments or questions.

Thanks,

Dan
--