Allied Telesyn International Corp AT-9448Ts/XP Installation Guide download pdf (Page 18)

Chapter 1: Overview

Introduction

The switches in the AT-9400 Series are divided into the Layer 2+ group

and the Basic Layer 3 group. The switches of the two groups share many

of the same features, but there are a number of significant differences,

such as Internet Protocol version 4 packet routing and Virtual Router

Redundancy Protocol, which only the Basic Layer 3 switches support.

Three models in the Basic Layer 3 series support an additional feature

called stacking. What stacking does is it allows you to connect the

switches together so that they function as a unified Gigabit Ethernet

switch, rather than as independent units. When assembled into a stack,

the switches synchronize their actions so that network operations, like

spanning tree protocols, virtual LANs, and static port trunks, are able to

span across all of their Gigabit Ethernet ports.

The two principal advantages of stacking are:

 You can configure the switches simultaneously from the same

management session, rather than individually from different sessions.

This can simplify network management.

 You have more latitude in how you can configure some of the features.

For instance, when creating a static port trunk on a stand-alone switch

you have to choose ports from the same switch. In contrast, a static

trunk on a stack can have ports from different switches in the same

stack.

Before you begin to build a stack, Allied Telesis recommends reading

Chapter 1, “Overview,” in the AT-S63 Stack Command Line Interface

User’s Guide for background information on this feature. An

understanding of the information provided there can make the task of

installing the stack easier. Here are a few of the main points:

 The switches must have Version 3.0.0 or later of the AT-S63

Management Software. Earlier versions of the management software

do not support this feature.

 A stack can have up to five 48-port AT-9448Ts/XP Switches, or eight

24-port AT-9424Ts or AT-9424Ts/XP Switches or both 24-port and 48-

port switches.

 The switches must have the AT-StackXG Stacking Module.

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Allied Telesyn International Corp AT-9448Ts/XP Installation Guide Page 18