Allied Telesis AT-S63 - Manual (Page 572)

Chapter 24: Multiple Spanning Tree Protocol
572 Section V: Spanning Tree Protocols
Enter new priority [the value will be multiplied by
4096]: [0 to 15] ->
5. Enter the increment that represents the new CIST priority value. The
range is 0 (zero) to 61,440 in increments of 4,096, with 0 being the
highest priority. For a list of the increments, refer to Table 16, “Port
Priority Value Increments” on page 529.
6. After making changes, type R until you return to the Main Menu. Then
type S to select Save Configuration Changes.