Cascade Down - Nortel 4500 Series Installation Manual

Ethernet routing switch

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50 Installing the Nortel Ethernet Routing Switch

Cascade down

In a cascade down conﬁguration, the base unit is located at the top of the

stack. The system automatically numbers the physical units based on the

designated base unit (Unit 1). 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 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 demonstrates a typical cascade

down (stack down) conﬁguration.

Cascade Down (Stack Down) conﬁguration

1. Base Unit

2. Last Unit

3. Cascade Cable

4. Cascade Cable

Note: Since many network management software packages assume a

cascade down (stack down) conﬁguration, Nortel recommends that you

use a cascade down conﬁguration.

Nortel Ethernet Routing Switch 4500 Series

Installation Guide

NN47205-300 02.01 Standard

5.0 23 February 2007

Nortel Networks Conﬁdential

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