Avaya P580 User Manual download pdf (Page 131)

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Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, Version v5.3.1 4-1

Using VLANs, Spanning Tree,

Hunt Groups, and VTP Snooping

Overview

The following information and procedures are provided in this

chapter and pertain to layer 2 and layer 3 module configurations:

■ VLAN Introduction

■ Creating and Implementing VLANs

■ Spanning Tree Protocol Setup and Monitoring

■ Using Hunt Groups to Aggregate Bandwidth between Switches

■ Configuring VLAN Trunk Protocol (VTP) Snooping

VLAN Introduction

This section introduces Virtual Local Area Networks (VLANs),

explains how they operate, and provides procedures for creating

VLAN’s.

Need for VLANs If a traditional bridge receives a frame with a broadcast, multicast, or

unknown destination address, it forwards the data to all bridge ports

except the port on which it was received. This process is referred to

as bridge flooding. As networks grow and the amount and types of

traffic increase, bridge flooding may create unnecessary traffic

problems that can clog the Local Area Networks (LAN).

To help control the flow of traffic through a switch and meet the

demands of growing networks, vendors have responded by using:

■ Customized packet filtering to control which packets are

forwarded.

■ More routers as broadcast firewalls to divide the network into

broadcast domains.

■ Spanning Tree Protocol to control the flow of traffic among

LANs (for redundant links).

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