GE MULTILINK 1601-9026-A3 - Manual (Page 58)

54 MULTILINK ETHERNET COMMUNICATIONS SWITCH – QUICKSTART GUIDE
QUICKSTART GUIDE
Z Select the Configuration > RSTP > RO Mode menu as shown above.
Z Click the Edit button to configure RO Mode.
Z Select the desired ports that are part of the ring, as shown below.
Z Click OK to exit.
Only 2 ports can be selected to Ring Only Mode.