Clean bandwidth refers to the maximum normal clean bandwidth that can be processed by Anti-DDoS...

Clean bandwidth refers to the maximum normal clean bandwidth that can be processed by Anti-DDoS Premium instances when your business is not under attack. Make sure that the Clean bandwidth of the instance is greater than the peak value of the inbound or outbound traffic of all services connected to the Anti-DDoS Premium instances

If the actual traffic volume exceeds the maximum Clean bandwidth, your business may be subject to traffic restrictions or random packet losses, and your normal business may be unavailable, slowed, or delayed for a certain period of time