This document describes how to enable or disable multicast for VPCs.
Multicast and broadcast are modes of one-to-many communication, which can help enterprises reduce network bandwidth consumption and network load through point-to-multipoint efficient data transmission.
If unicast is used, the sending server needs to separately send to N servers for total N times. If multicast is used, the server sends the same data to N servers only once, which reduces server resource consumption and also bandwidth resources of the backbone network.
The broadcast and multicast features are currently in beta. To try it out, please submit an application.
Multicast and broadcast are mostly used in the financial and game industries:
For detailed directions regarding the subnet broadcast, see Enabling or Disabling the Broadcasting and Multicasting.