tencent cloud

Background

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.
In the unicast mode, the initiating server sends data to N servers separately. If the multicast mode, the server sends the same data to N servers in once, which reduces the server resource consumption and also the bandwidth resource of the backbone network.

• Multicast: Tencent Cloud supports multicast on the VPC dimension.
• Broadcast: Tencent Cloud supports broadcast on the subnet dimension.

Note：

• The broadcast and multicast features are currently in beta test. If you do need to use them, please submit an application.
• At present, the regions supporting multicast and broadcast are: Beijing, Shanghai, Guangzhou, Chengdu, Chongqing, Nanjing, Hong Kong of China, Singapore, Seoul, Tokyo, Bangkok, Toronto, Silicon Valley, Virginia, Frankfurt and Moscow.

Overview

Multicast and broadcast are mostly used in the financial and game industries:

• Broadcast services or market data of the financial industry. For example, after obtaining stock prices and other real-time data, brokers can broadcast stock data to multiple clients in real time, effectively reducing network load.
• For the game industry, broadcast and multicast are mainly used for heartbeat holding between multiple servers.

This document describes how to enable or disable broadcast for subnets.

Directions

Enabling broadcast

1. Log in to the VPC console.
2. Click Subnet on the left sidebar to access the admin page.
3. In the VPC list, locate the target VPC, and toggle on Enable under the Subnet broadcast column.
   

Disabling broadcast

1. Log in to the VPC console.
2. Click Subnet on the left sidebar to access the admin page.
3. In the VPC list, locate the target VPC, and toggle on Disable under the Subnet broadcast column.
   

References

For more information about the VPC-level multicast, see Enabling or Disabling Multicast.