Nortel BayStack 5520-48T-PWR Install Manual page 32

32 Installation fundamentals
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 Nortel Ethernet Routing Switch
5500 Series back panel and consists of the 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.
Attention: To create a stack connection, order the appropriate Nortel
Ethernet Routing Switch 5000 Series cascade cables to ensure fail-safe
stacking. An 18 inch cable is provided with the switch. Ensure you order
additional 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
(page 35)
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.
Copyright © 2008–2009 Nortel Networks
•
"Cascade down" (page 35)
•
"Cascade up" (page 36)
•
"Redundant cascade stacking" (page 37)
and "Cascade up" (page
ERS 5000 Series Installation
NN47200-300 04.03
13 April 2009
"Cascade down"
36).