Broadcasting and multicast 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.

• Broadcasting: Tencent Cloud supports broadcasting on the subnet dimension.
• Multicast: Tencent Cloud supports multicast on the VPC dimension.

The broadcasting and multicast features are in beta test stage. If you do need to use both features, please submit a Beta test application.

Operation Scenarios

Broadcasting and multicast are mostly used in the financial and gaming industries:

• Broadcasting 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 gaming industry, broadcasting and multicast are mainly used for heartbeat holding between servers.

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 network backbone.

Steps

Enabling or disabling broadcasting

Enabling broadcasting

1. Log in to VPC Console.
2. Click Subnets in the left sidebar to go to the management page.
3. In the list, find the row of the VPC for which you want to enable the broadcasting feature, click Enable under Subnet Broadcast, and confirm the enablement.
   

Disabling broadcasting

1. Log in to VPC Console.
2. Click Subnets in the left sidebar to go to the management page.
3. In the list, find the row of the VPC for which you want to disable the broadcasting feature, click Disable under Subnet Broadcast, and confirm the disablement.
   

Enabling or disabling multicast

Enabling multicast

1. Log in to VPC Console.
2. In the list, find the row of the VPC for which you want to enable the multicast feature, click Enable under Multicast, and confirm the enablement.
   

Disabling multicast

1. Log in to VPC Console.
2. In the list, find the row of the VPC for which you want to disable the multicast feature, click Disable under Multicast, and confirm the disablement.