Chapter 1 Introduction; Features - Cabletron Systems SmartSwitch 9000 User Manual

Introduction
The 9T122-08 MicroLAN™ Switch Extension Module, shown in Figure 1-1, is a
three port Token Ring switch module. This module supports two separate Token
Rings with four lobe connections each, and an interface to the FNB backplane.
Each front panel Token Ring also supports Ring-in/Ring-out connections by
using plug-in Token Ring Port Interface modules (TPIMs).

Features

Processor
The 9T122-08 is equipped with an advanced Intel i960 microprocessor. This
microprocessor provides a platform for all management functions within a
scalable RISC-based architecture.
System Management
Interfaces to the two System Management Buses (SMB-1 and SMB-10) for
intermodule management.
Connectivity
The 9T122-08 provides four RJ-45 Trunk Coupling Unit (TCU) lobe connectors for
each of the two front panel Token Rings. Each front panel Token Ring has sockets
for TPIMs, allowing for Ring-in/Ring-out connections
SRT Packet Switching
SRT Bridging between the front panel Token Ring connections and SR-TB
bridging to any other module in the chassis via FNB -1 or FNB -2 of the FNB bus.
The module is capable of Transparent Bridging and/or Source Route Bridging.
IEEE 802.1d Spanning Tree Protocol is supported in all bridging functions.
Translational bridging between Source Routing and Transparent Frames types is
also performed for packets destined for the FNB.
Chapter 1
1-1