Avaya 5900 Series Installing Manual page 46

Switch installation
You can stack any of the switches in the ERS 5900 Series. You can connect up to eight switch
devices that are in one Rack Unit (RU) height in a stack to provide uninterrupted connectivity for up
to 384 ports.
For ERS 5900 Series, the stacking bandwidth is 42 Gbps per port and 84 Gbps per switch.
Note:
The height of ERS 59100GTS and ERS 59100GTS-PWR+ are 2 RUs. You can connect up to
four switch devices in a stack.
Standalone arrangement
Any one switch can operate in a standalone configuration. You can add more switches as your traffic
increases.
Stack arrangement
You connect the switches in the stack by the stack connectors. You designate one unit as the base
unit by setting a switch on the back panel.
The stack connector is a component of the back panel and consists of the Base Unit Select switch,
Cascade Down connector, and Cascade Up connector.
The Cascade Down connector connects this switch to the next unit in the stack through a cascade
cable. A connection from this connector must be attached to the Cascade Up connector of the next
switch in the stack. A return cable from another Cascade Down connector to this unit's Cascade Up
connector completes the stack connection.
Important:
To create a stack connection, order the appropriate cascade cables to ensure fail-safe stacking.
Order stacking cables of the correct length for a stack of three or more units. You require one
long cable (stack return cable) to complete the loop in a stack from the bottom unit to the top
unit. See Cascade down
The Cascade Up connector provides an attachment point for accepting a cascade cable connection
from another unit in the stack. A return cable from the Cascade Down connector to the Cascade Up
connector on the adjacent unit completes the stack connection.
September 2017
on page 48 and Cascade up
Installing Avaya ERS 5900 Series
Comments on this document? infodev@avaya.com
on page 50.
46