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Introduction to the BayStack 410-24T Switch
Base Unit
The base unit is the unique stack unit that you configure with the Unit Select switch on the front panel of the
One unit in the stack must be configured as the base unit; all other units in the stack must have their Unit Select switch set to Off.
Normally, any single unit in a stack configuration can be assigned as the base unit, with the following restriction: In a mixed stack configuration that contains one or more Business Policy Switch units, a Business Policy Switch must be configured as the base unit.
Note: If you do not designate a Business Policy Switch as the base unit of a mixed stack configuration, the stack configuration will not operate.
The physical ordering of all of the other units in the stack is determined by the position of the base unit within the stack. This is important for management applications that view the physical ordering of the units within the stack.
Some characteristics of the base unit are:
•Initial Installation
During the initial installation of the stack, the software automatically determines the physical order of all units in the stack according to the position of the base unit within the stack. Thereafter, the individual units maintain their original unit numbering, even if you change the position of one or more units in the stack.
For example, when you initially power up the stack, the base unit becomes unit 1 and the unit that the base unit connects to (via the Cascade A Out cable) becomes unit 2 (and the next unit is unit 3 and so on), until the maximum stack configuration (up to 8 units) is reached. If you change the base unit to another unit in the stack, the new base unit keeps its original unit number in the stack.
Note: You can renumber the units using the Renumber Stack Units screen; see “Renumber Stack Units” on page
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