SMC Networks TigerStack II SMC8848M

I NSTALLING THE S WITCH
3-10
4. (Optional) To form a wrap-around topology, plug one end of a stack
cable into the Down port on the bottom unit and the other end into
the Up port on the top unit.
Figure 3-7 Making Stacking Connections
5. Select the Master unit in the stack by pressing the Master button in on
only one of the switches. Only one switch in the stack can operate as
the Master, all other units operate in slave mode. If more than one
switch in the stack is selected as Master, or if no switches are selected,
the system will select the unit with the lowest MAC address as the
Master.