Instruction manual

Stack Down Configurations

In Figure 6, data flows from the base unit (unit 1) to the

next switch, which is assigned as unit 2, and continues

until the last switch in the stack is assigned as unit 8. The

physical order of the switches is from top to bottom (unit 1

to unit 8).

In any stack configuration, the following applies:

• The entire stack becomes a single logical unit within

30 seconds after the base unit initialization.

• You can attach an RS-232 communications cable to

the Console/Comm port of any switch in the stack.

• In a mixed stack that contains one or more Business

Policy Switches, you can downline upgrade the entire

stack only from a Business Policy Switch.

• You can access and manage the stack using a

TELNET connection or any generic SNMP

management tool through any switch port that is part

of the stack configuration.

Note:

Certain network management station (NMS)

applications assume a stack down configuration for

the graphical user interface (GUI) that represents the

stack. For this reason, Nortel Networks recommends

that you always configure the top stack unit as the base

unit.