GE ML1600 - Manual (Page 219)

CHAPTER 13: RAPID SPANNING TREE PROTOCOL CONFIGURING STP/RSTP WITH ENERVISTA SECURE WEB MANAGEMENT SOFTWARE
MULTILINK ML1600 ETHERNET COMMUNICATIONS SWITCH – INSTRUCTION MANUAL 13–21
To configure ring-only mode, ensure the first three of the four situations described above
are met.
To enable ring-only mode, first
Z Enable RSTP by setting the STP Type to RSTP in the Administration
> Set > STP Type menu:
Z Select the Configuration > RSTP > Bridge RSTP menu as shown
below.