GE MultiLink ML1200 Instruction Manual page 228

RAPID SPANNING TREE PROTOCOL
13–20
To configure ring-only mode, ensure the first three of the four situations described above
are met.
To enable ring-only mode, first
Enable RSTP by setting the STP Type to RSTP in the Administration >
Set > STP Type menu:
Select the Configuration > RSTP > Bridge RSTP menu as shown
below.
Click the Edit button to configure RSTP.
CHAPTER 13: RAPID SPANNING TREE PROTOCOL
MULTILINK ML1200 MANAGED FIELD SWITCH – INSTRUCTION MANUAL