What is the reliability of UDP multicast on a LAN?

Let's say that all receivers are connec开发者_JS百科ted to the same router, which is one hop away. What percent of UDP multicast packets should I expect to be dropped/lost in this setup?

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Most packets are lost due to buffer overflows not due to the quality of the network, aside of using interference prone mediums such as radio.

So to answer, you should expect 0% dropped packets. What you will see is entirely dependent upon application load causing the incoming socket buffers to not be timely read.