Avaya 5900 Series Installing Manual page 50

Switch installation
Important:
Since many network management software packages assume a cascade down (stack down)
configuration, Avaya recommends the usage of this configuration.
For stack installation procedures, see
Cascade up
In a cascade up (stack up) configuration, the base unit is physically located as the top unit in the
stack. The cable connected to the Cascade Down connector of the base unit terminates in the
Cascade Up connector physically located at the bottom of the stack. This next unit is designated
Unit 2. The stack is wired upward through the units and the system continues to number in this
manner throughout the stack. In this configuration, the base unit discovers the stack in a cascade up
(stack up) direction. The following illustration shows a cascade up (stack up) configuration.
September 2017
Stack configuration
Installing Avaya ERS 5900 Series
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on page 53.
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