Black Box LGB6000SC-004, LGB6001C, LGB6000SC-001 Stacking Topologies, Making Stacking Connections

CHAPTER 3 Installing the Switch

Connecting Switches in a Stack

Figure 18: 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.

STACKING TOPOLOGIES

All units in the stack must be connected via stacking cable (part numbers LGB6000SC-001 or LGB6000SC-004). You can connect units in a simple cascade configuration, connecting Down ports to Up ports, from the top unit to the bottom unit. Using this “line” topology, if any link or unit in the stack fails, the stack is split and two separate segments are formed. The Stack Link LEDs on the units that are disconnected flash to indicate that the stack link between them is not functioning (see Table 2, “System Status LEDs,” on page 27).

When using line topology and a stack link failure occurs, the stack reboots and a Master unit is selected within each of the two stack segments. The Master unit will be either the unit with the Master button depressed or the unit with the lowest MAC address if the Master button is not depressed on any unit. When the stack reboots and resumes operations, note that the IP address will be the same for both of the stack segments. To resolve the conflicting IP addresses, you

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