Cabletron Systems 9T425-16, 9T427-16, 9T428-16 Introduction

1-1

Introduction

The 9T425-16, 9T427-16, and 9T428-16 Token Ring SmartSwitch 9000

Modules

are Enterprise Backbone switches supporting Smart Networking Services, RMON

per port and Dedicated Token Ring. The 9T425-16, 9T427-16, and 9T428-16

modules (shown in Figure 1-1) provide sixteen ports, either UTP or STP for the

9T425-16 and 9T427-16, or multimode Þber for the 9T428-16. Combined with its

connection to the INB2 backplane, this provides for up to 112 or 224 separate

Token Ring segments to be interconnected within a single SmartSwitch 9000

chassis.

Processor

The 9T425-16, 9T427-16, and 9T428-16 are equipped with an advanced Intel i960

microprocessor. This microprocessor provides a platform for all management

functions within a scalable RISC-based architecture.

SmartSwitch 9000 ASIC – Distributed Switching

These modules provide the fastest Switching fabric available at 750 Kpps. Each

module contains its own switch fabric - eliminating central board Single Point of

Failure.

System Management

As with most SmartSwitch 9000 modules, the 9T425-16, 9T427-16, and 9T428-16

interface to the two System Management Buses (SMB-1 and SMB-10) for

intermodule management.

Connectivity

The 9T425-16, 9T427-16, and 9T428-16 provide sixteen front panel C-ports,

allowing direct station attachment or station emulation for hub connections. STP

and UTP cables are supported by the 9T425-16 and 9T427-16, and multimode Þber

is supported by the 9T428-16.