Nortel 5500 series, Руководство по установке

Страница: 57 / 70

Nortel Ethernet Routing Switch 5500 Series Stack Configuration 57
Stack configurations
Due to stack parameters being associated with the base unit, the physical
stack order depends on the base unit position and whether the stack is
configured cascade up (stack up) or cascade down (stack down). This
designation depends on the stack cabling arrangement.
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
demonstrates a cascade down (stack down) configuration.
Cascade Down (Stack Down) configuration
1. Base Unit
2. Last Unit
3. Cascade Cable
Nortel Ethernet Routing Switch 5500 Series
Installation
NN47200-300 2.00 Standard
5.0 7 July 2006
Copyright © 2005 - 2006, Nortel Networks Nortel Networks Confidential
.