After TCP multiplexing is enabled, your service can obtain lower transmission delay. This topic describes how to enable TCP multiplexing.


  • Only domains that choose TCP as the transport protocol are supported. Domains relying on UDP are not applicable.
  • TCP multiplexing is enabled /disabled by origin ports and is disabled by default.


If your request response is less than 5 KB, we recommend that you enable TCP multiplexing.


  1. Log on to the DCDN console.
  2. In the left-side navigation pane, click IP Application Accelerator.
  3. On the IP Application Acceleration page, find the target domain name and click Configure.
  4. On the Performance Optimization page found in the left-side navigation pane, toggle the TCP switch for the port that you want to accelerate.

Illustration of acceleration effect

The yellow line is the delay measurement after TCP multiplexing is enabled, and the overall delay is significantly reduced.

Note The delay effect is subject to the specific scenario.