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The Download speed limit option controls the content delivery speed to end users. To configure the download speed limit: 1. Navigate to CDN and select the CDN resource to configure.
CDN resources list
2. In the sidebar, under Network limits, click Download speed limit. 3. Enable the Download speed limit toggle. The option has two modes: Static and Dynamic.

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Static

This mode sets a limit on all content transmitted through the CDN. When this mode is selected, configure the Connection speed and Limit after parameters.
Static mode with Connection speed and Limit after fields

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Connection speed

This setting defines the maximum download speed per connection in kilobytes per second (kB/s). The minimum accepted value is 1 kB/s.

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Limit after

This setting defines the amount of data that downloads without a speed limit before the Connection speed setting takes effect. If set to 0, the download speed is limited immediately from the first byte.

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Dynamic

This mode sets different limits for different users or content types. The speed is adjusted based on the speed and buffer query string arguments.
Dynamic mode description with speed and buffer query argument example
The speed argument sets the maximum download speed, while buffer sets how much data transfers without the speed limit. The buffer argument is optional. Pass the arguments as query string parameters. The following URL limits download speed to 50 kB/s after downloading 500 kB:

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Option features

  • For both modes, the limit is set per connection, so if a client opens two connections at the same time, the total speed is twice the specified limit.
  • Ignore Query String does not affect the Download speed limit option. They can be used together.