GE ML2400 - Manual (Page 42)

QS–38 MULTILINK ML1600/2400 ETHERNET COMMUNICATIONS SWITCH – QUICKSTART GUIDE
QUICK START GUIDE
Note that ports 21 and 23 are now part of both VLAN1 and VLAN 2.
You have now completed the exercise.
QS.5.2 Configuring the Multilink switch for Ring Only Mode
This feature can be only be used when the switches are connected to form a single ring
topology which means that only two ports per switch are used to form the ring and all
other ports will not be part of another ring. Note that RSTP and Ring-only mode support a
maximum of 18 switches. RO mode has typical recovery time of
≤ 5 ms/hop.