Cascade Down - Avaya 5000 Series Installation Manual

Installation fundamentals
Regardless of stack configuration, the following applies:
• When power is applied to the stack the base unit initializes, typically within sixty seconds,
and the entire stack powers up as a single logical unit.
• A RS-232 communications cable can be attached to the console port of any switch in the
stack to establish a console connection.
• A software upgrade can be performed on the stack from any switch using the console
interface, a Telnet session, the Enterprise Device Manager interface, or any SNMP-
based management software.
• The stack can be managed using a Telnet session, Enterprise Device Manager interface,
or any SNMP-based management software through any stack switch port.

Cascade down

The system automatically numbers the physical units based on the designated base unit (Unit
1). In a cascade down 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 on the next unit in the stack which is physically located below the base
unit. This next unit is designated Unit 2. The stack is wired downward 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 down (stack down) direction. The following
illustration shows a cascade down (stack down) configuration.
30 Avaya Ethernet Routing Switch 5000 Series Installation December 2010