BayStack 450 10/100/1000 Series Switches
Note: For stacking three or more units (maximum 8 units per stack), order the optional 1 meter (39.27 inch) cascade
Base Unit
The base unit is the unique stack unit that you configure with the Unit Select switch on the front panel of the
Note: Although you can assign any single unit in the stack as the base unit, when mixing supported BayStack switch models in a single stack, Nortel Networks recommends that you select the unit with the highest bandwidth to be the base unit. The additional workload of the base unit is optimized by using the higher bandwidth switch model.
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 described in the following sections.
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 (you can renumber the units using the Renumber Stack Units screen; see “Renumber Stack Units” on page
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.
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