Allied Telesis AT-S63 - Manual (Page 322)

Chapter 15: Class of Service
322 Section II: Advanced Operations
The default value of 1 for each queue gives all egress queues the
same weight. For two examples of the weighted round robin
scheduling method, refer to Table 13 on page 315 and Table 14 on
page 316.
6. To permanently save your change, return to the Main Menu and type S
to select Save Configuration Changes.