Allied Telesis AT-S63 - Manual (Page 260)

Chapter 18: Quality of Service (QoS) Commands
260 Section I: Basic Features
DESTROY QOS FLOWGROUP
Syntax
destroy qos flowgroup= value
Parameter
flowgroup Specifies the ID number of the flow group you want to
delete. You can delete more than one flow group at a time.
You can specify the flow groups individually, as a range, or
both.
Description
This command deletes flow groups.
Examples
This command deletes the flow group 22:
destroy qos flowgroup=22
This command deletes the flow groups 16 to 20 and 23:
destroy qos flowgroup=16-20,23