Avaya Configuring Data Compression Services Manual do Utilizador

Part No. 117352-C Rev. 00June 1998BayRS Version 12.20Site Manager Software Version 6.20 Configuring Data Compression Services

117352-C Rev. 00xiTablesTable 1-1. Link Modules Supported by FRE-2-060E Processor with Advanced Compression Coprocessor Daughterboard 1-3Table 2-1. D

117352-C Rev. 00xiii About This GuideIf you are responsible for configuring data compression, you need to read this guide.Before You BeginBefore using

Configuring Data Compression Servicesxiv117352-C Rev. 00Conventionsbold textIndicates text that you need to enter, command names, and buttons in menu

About This Guide117352-C Rev. 00xv AcronymsACK acknowledgmentCCP Compression Control ProtocolCPC continuous packet compressionDDN Defense Data Network

Configuring Data Compression Servicesxvi117352-C Rev. 00Bay Networks Technical PublicationsYou can now print technical manuals and release notes free,

About This Guide117352-C Rev. 00xvii How to Get HelpIf you purchased a service contract for your Bay Networks product from a distributor or authorized

117352-C Rev. 001-1 Chapter 1Starting CompressionThe quickest way to begin using data compression on your network is to enable it with the default con

ii117352-C Rev. 004401 Great America Parkway 8 Federal StreetSanta Clara, CA 95054 Billerica, MA 01821Copyright © 1998 Bay Networks, Inc.All rights re

Configuring Data Compression Services1-2117352-C Rev. 00Summary of Bay Networks Data Compression FeaturesYou can configure both software- and hardware

Starting Compression117352-C Rev. 001-3 • Compression for a BayStack AN platform at 2 x 64 KB/s compressed throughput, full duplex; or 128 KB/s aggreg

Configuring Data Compression Services1-4117352-C Rev. 00The type of data compression you configure depends on the upper layer protocol you want to run

Starting Compression117352-C Rev. 001-5 Preparing a Configuration File for Data CompressionTo configure data compression, you use the Bay Networks Sit

Configuring Data Compression Services1-6117352-C Rev. 00Configuring Software CompressionSoftware compression works on all router platforms and all ser

Starting Compression117352-C Rev. 001-7 Enabling Compression for X.25To enable WCP on an X.25 interface, you must first add an X.25 service record, th

Configuring Data Compression Services1-8117352-C Rev. 00Configuring Hardware CompressionTo use hardware compression for the BN router, you must have e

Starting Compression117352-C Rev. 001-9 Configuring Compression for a BN (Octal Synchronous Link Module)To configure hardware compression for a BN tha

Configuring Data Compression Services1-10117352-C Rev. 00Configuring Compression for an ASNTo configure hardware compression for the ASN, complete the

Starting Compression117352-C Rev. 001-11 For More InformationFor detailed information about Bay Networks data compression, see Chapter 2, “Data Compre

117352-C Rev. 00iiiBay Networks, Inc. Software License AgreementNOTICE: Please carefully read this license agreement before copying or using the accom

117352-C Rev. 002-1 Chapter 2Data Compression OverviewBay Networks data compression services enable you to reduce line costs and improve response time

Configuring Data Compression Services2-2117352-C Rev. 00Bay Networks Compression ServicesBay Networks compression services include:• Software-based co

Data Compression Overview117352-C Rev. 002-3 Data Compression ArchitectureWCP and Hi/fn LZS use different compression algorithms and protocols. The co

Configuring Data Compression Services2-4117352-C Rev. 00Hi/fn LZS AlgorithmHi/fn™ is a wholly owned subsidiary of Stac, Inc. Bay Networks Hi/fn LZS co

Data Compression Overview117352-C Rev. 002-5 PPP Hi/fn LZS Compression ProtocolPPP uses CCP to negotiate how the router uses the Hi/fn LZS Compression

Configuring Data Compression Services2-6117352-C Rev. 00Hardware Compression for the BNThe BN supports the following compression daughterboards:• AG21

Data Compression Overview117352-C Rev. 002-7 • A 128-contexts compression daughterboard or net module can run compression simultaneously over 127 CPC

Configuring Data Compression Services2-8117352-C Rev. 00How Data Compression WorksTo transmit compressed data, the router must complete one or both of

Data Compression Overview117352-C Rev. 002-9 Figure 2-1. CCP and WCP Initialization on a PPP LinkRouter A Router B1. PPP interface on network; LCP ne

iv117352-C Rev. 00its own data and information and for maintaining adequate procedures apart from the Software to reconstruct lost or altered files, d

Configuring Data Compression Services2-10117352-C Rev. 00CCP NegotiationsCCP allows the two ends of a PPP connection to negotiate whether to use data

Data Compression Overview117352-C Rev. 002-11 Data TransmissionFor PPP links using WCP, Network Control Protocol (NCP) negotiations and WCP negotiatio

Configuring Data Compression Services2-12117352-C Rev. 00PPP MultilinkMultilink provides capabilities beyond those of multiline circuits. Multilink co

Data Compression Overview117352-C Rev. 002-13 PPP Bandwidth-on-DemandBandwidth-on-demand allows a secondary dial-up line to augment a primary leased l

Configuring Data Compression Services2-14117352-C Rev. 00Frame Relay ServicesYou can use software (WCP only) or hardware data compression with frame r

Data Compression Overview117352-C Rev. 002-15 The backup circuit can inherit the primary circuit’s configuration, or it can use its own. When the fram

Configuring Data Compression Services2-16117352-C Rev. 00Adjusting X.25 Max Window SizeWindow size can affect packet throughput across the X.25 networ

117352-C Rev. 003-1 Chapter 3Customizing Data CompressionWhen you enable data compression, default values are in effect for all parameters. For WCP an

Configuring Data Compression Services3-2117352-C Rev. 00Accessing Configuration WindowsTo customize compression, you need to access specific configura

Customizing Data Compression117352-C Rev. 003-3 To access this window, complete the following tasks: WCP Circuit Interface ParametersThe WCP Circuit I

117352-C Rev. 00vContents About This GuideBefore You Begin ...

Configuring Data Compression Services3-4117352-C Rev. 00To access this window, complete the following tasks: Hi/fn LZS Circuit Interface ParametersThe

Customizing Data Compression117352-C Rev. 003-5 To access this window, complete the following tasks: Allocating Compression Memory for WCPUsing WCP ac

Configuring Data Compression Services3-6117352-C Rev. 00Modifying the Compression ModeTo specify the mode that the router uses to compress data, modif

Customizing Data Compression117352-C Rev. 003-7 8 KB History SizeIn general, 8 KB histories are appropriate for frame relay and X.25, when you have la

Configuring Data Compression Services3-8117352-C Rev. 00Table 3-2 shows the maximum number of 8 KB contexts each daughterboard or net module can suppo

Customizing Data Compression117352-C Rev. 003-9 Modifying the History SizeTo maximize throughput, you can modify the History Size parameter. To modify

Configuring Data Compression Services3-10117352-C Rev. 00Modifying the Buffer SizeTo protect against data loss, modify the Buffer Size parameter. To m

Customizing Data Compression117352-C Rev. 003-11 You can use software compression even though you are using a hardware compression daughterboard or ne

Configuring Data Compression Services3-12117352-C Rev. 00Modifying the Fallback Compression ModeTo specify the fallback compression mode, modify the F

Customizing Data Compression117352-C Rev. 003-13 Disabling CompressionYou may want to temporarily disable compression on a line or circuit, then reena

vi117352-C Rev. 00Hi/fn LZS Algorithm ...2-4Compressio

Configuring Data Compression Services3-14117352-C Rev. 00Deleting Data Compression from a RouterTo delete compression from all circuits on the router,

117352-C Rev. 00A-1 Appendix AData Compression ParametersThis appendix describes the data compression parameters. You can display the same information

Configuring Data Compression ServicesA-2117352-C Rev. 00The Technician Interface allows you to modify parameters by issuing set and commit commands wi

Data Compression Parameters117352-C Rev. 00A-3 Parameter: Compression ModePath: Configuration Manager > Protocols > WCP > LinesDefault: Conti

Configuring Data Compression ServicesA-4117352-C Rev. 00Parameter: History SizePath: Configuration Manager > Protocols > WCP > LinesDefault:

Data Compression Parameters117352-C Rev. 00A-5 Parameter: Buffer SizePath: Configuration Manager > Protocols > WCP > LinesDefault: NormalOpti

Configuring Data Compression ServicesA-6117352-C Rev. 00Parameter: Fallback Compression ModePath: Configuration Manager > Protocols > WCP > L

Data Compression Parameters117352-C Rev. 00A-7 WCP Circuit Interface ParametersUse the following descriptions to set WCP circuit interface parameters.

Configuring Data Compression ServicesA-8117352-C Rev. 00Parameter: History SizePath: Configuration Manager > Protocols > WCP > InterfacesDefa

Data Compression Parameters117352-C Rev. 00A-9 Hi/fn LZS Interface ParametersUse the following descriptions to set Hi/fn LZS compression parameters.Pa

117352-C Rev. 00viiMaximizing the Compression Ratio ...3-5Modifying the Compres

Configuring Data Compression ServicesA-10117352-C Rev. 00Parameter: Engine TypePath: Configuration Manager > Protocols > Hi/fn LZS > Interfac

Data Compression Parameters117352-C Rev. 00A-11 PPP Interface Parameters for CompressionThe PPP Interface List window contains two parameters for data

Configuring Data Compression ServicesA-12117352-C Rev. 00Parameter: Compression ProtocolPath: Configuration Manager > Protocols > PPP > Inter

117352-C Rev. 00Index-1Bbandwidth-on-demand, 2-13Buffer Size parameter, WCP line, A-5CCCP Type parameter, A-11circuit interface parameters, A-7Compres

Index-2117352-C Rev. 00fallback compression mode, choosing, 3-11frame relaydata compression features, 2-14preventing data loss, 3-9Hhardware compressi

117352-C Rev. 00ixFiguresFigure 2-1. CCP and WCP Initialization on a PPP Link ............2-9Figure 3-1. WCP Line In