Allied Telesis AT-S63 - Manual (Page 86)

Chapter 5: Port Parameters
86 Section I: Basic Operations
Multicast Rate
Use this parameter to set the multicast rate limit in packets per second.
The range is 0 to 262143. The default is 262143.
6. After entering the desired changes, click Apply.
The switch activates the parameter changes on the port.
7. To permanently save your changes, select the Save Config option in
the Configuration menu.