Avaya Configuring Data Compression Services Manuale Utente

Part No. 303519-A Rev. 00October 1998BayRS Version 13.00Site Manager Software Version 7.00 Configuring Data Compression Services

303519-A Rev. 00xiTablesTable 1-1. Link Modules Supported by FRE-2-060E Processor with Advanced Compression Coprocessor Daughterboard ...

303519-A Rev. 00xiii PrefaceThis guide describes Bay Networks® data compression and what you do to configure compression.Before You BeginBefore using

Configuring Data Compression Servicesxiv303519-A Rev. 00Text ConventionsThis guide uses the following text conventions:bold textIndicates text that yo

Preface303519-A Rev. 00xv AcronymsACK acknowledgmentCCP Compression Control ProtocolCPC continuous packet compressionDDN Defense Data NetworkDLCI data

Configuring Data Compression Servicesxvi303519-A Rev. 00Bay Networks Technical PublicationsYou can now print Bay Networks technical manuals and releas

303519-A Rev. 001-1 Chapter 1Starting CompressionThe quickest way to begin using data compression on your network is to enable it with the default con

Configuring Data Compression Services1-2303519-A Rev. 00Summary of Bay Networks Data Compression FeaturesYou can configure both software- and hardware

Starting Compression303519-A Rev. 001-3 • Compression for a BayStack AN platform at 2 x 64 KB/s compressed throughput, full duplex; or 128 KB/s aggreg

ii303519-A Rev. 004401 Great America Parkway 8 Federal StreetSanta Clara, CA 95054 Billerica, MA 01821Copyright © 1998 Bay Networks, Inc.All rights re

Configuring Data Compression Services1-4303519-A Rev. 00The type of data compression you configure depends on the upper layer protocol you want to run

Starting Compression303519-A Rev. 001-5 Preparing a Configuration File for Data CompressionTo configure data compression, you use the Bay Networks Sit

Configuring Data Compression Services1-6303519-A Rev. 00Configuring Software CompressionSoftware compression works on all router platforms and all ser

Starting Compression303519-A 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 Services1-8303519-A Rev. 00Configuring Hardware CompressionTo use hardware compression for the BN router, you must have e

Starting Compression303519-A Rev. 001-9 Configuring Compression for a BN (Octal Synchronous Link Module)To configure hardware compression for a BN tha

Configuring Data Compression Services1-10303519-A Rev. 00Configuring Compression for an ASNTo configure hardware compression for the ASN, complete the

Starting Compression303519-A Rev. 001-11 For More InformationFor detailed information about Bay Networks data compression, see Chapter 2, “Data Compre

303519-A Rev. 002-1 Chapter 2Data Compression OverviewBay Networks data compression services enable you to reduce line costs and improve response time

303519-A Rev. 00iiiBay Networks, Inc. Software License AgreementNOTICE: Please carefully read this license agreement before copying or using the acco

Configuring Data Compression Services2-2303519-A Rev. 00Bay Networks Compression ServicesBay Networks compression services include:• Software-based co

Data Compression Overview303519-A Rev. 002-3 Data Compression ArchitectureWCP and Hi/fn LZS use different compression algorithms and protocols. The co

Configuring Data Compression Services2-4303519-A Rev. 00Hi/fn LZS AlgorithmHi/fn™ is a wholly owned subsidiary of Stac, Inc. Bay Networks Hi/fn LZS co

Data Compression Overview303519-A 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 Services2-6303519-A Rev. 00Hardware Compression for the BNThe BN supports the following compression daughterboards:• AG21

Data Compression Overview303519-A Rev. 002-7 • A 128-contexts compression daughterboard or net module can run compression simultaneously over 127 CPC

Configuring Data Compression Services2-8303519-A Rev. 00How Data Compression WorksTo transmit compressed data, the router must complete one or both of

Data Compression Overview303519-A Rev. 002-9 Figure 2-1. CCP and WCP Initialization on a PPP LinkRouter A Router B1. PPP interface on network; LCP ne

Configuring Data Compression Services2-10303519-A Rev. 00CCP NegotiationsCCP allows the two ends of a PPP connection to negotiate whether to use data

Data Compression Overview303519-A Rev. 002-11 Data TransmissionFor PPP links using WCP, Network Control Protocol (NCP) negotiations and WCP negotiatio

iv303519-A Rev. 00its own data and information and for maintaining adequate procedures apart from the Software to reconstruct lost or altered files,

Configuring Data Compression Services2-12303519-A Rev. 00PPP MultilinkMultilink provides capabilities beyond those of multiline circuits. Multilink co

Data Compression Overview303519-A Rev. 002-13 PPP Bandwidth-on-DemandBandwidth-on-demand allows a secondary dial-up line to augment a primary leased l

Configuring Data Compression Services2-14303519-A Rev. 00Frame Relay ServicesYou can use software (WCP only) or hardware data compression with frame r

Data Compression Overview303519-A 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 Services2-16303519-A Rev. 00Adjusting X.25 Max Window SizeWindow size can affect packet throughput across the X.25 networ

303519-A Rev. 003-1 Chapter 3Customizing Data CompressionWhen you enable data compression, default values are in effect for all parameters. This chapt

Configuring Data Compression Services3-2303519-A Rev. 00Allocating Compression Memory for WCPUsing WCP across a network involves allocating memory to

Customizing Data Compression303519-A Rev. 003-3 To specify the compression mode for a circuit, complete the following tasks:Maximizing ThroughputEach

Configuring Data Compression Services3-4303519-A Rev. 00Table 3-1 lists the amount of memory required for 8 KB and 32 KB history sizes. If you select

Customizing Data Compression303519-A Rev. 003-5 Compression daughterboards reserve one 8 KB context for PPC, as opposed to CPC. There is no limit to t

303519-A Rev. 00vContents PrefaceBefore You Begin ...

Configuring Data Compression Services3-6303519-A Rev. 00You can combine 8 KB and 32 KB contexts on one daughterboard or net module. However, if you br

Customizing Data Compression303519-A Rev. 003-7 To modify the history size for a circuit, complete the following tasks:Preventing Data Loss for PPP an

Configuring Data Compression Services3-8303519-A Rev. 00• Number of resetsFor a link with a high number of resets and a low number of dropped packets,

Customizing Data Compression303519-A Rev. 003-9 Customizing Hardware Compression The following issues are specific to hardware compression:• Selecting

Configuring Data Compression Services3-10303519-A Rev. 00To specify hardware or software compression for a line configured with WCP, complete the foll

Customizing Data Compression303519-A Rev. 003-11 To specify hardware or software compression for an interface configured with Hi/fn LZS compression, c

Configuring Data Compression Services3-12303519-A Rev. 00To modify the fallback compression mode for a line configured with WCP, complete the followin

Customizing Data Compression303519-A Rev. 003-13 Changing the Compression Control ProtocolThere are two PPP interface parameters that you can modify f

Configuring Data Compression Services3-14303519-A Rev. 00Disabling CompressionYou may want to temporarily disable compression on a line or circuit, th

Customizing Data Compression303519-A Rev. 003-15 Disabling Hi/fn LZSTo disable or reenable Hi/fn LZS on an interface, complete the following tasks:5.

vi303519-A Rev. 00Chapter 2 Data Compression OverviewBay Networks Compression Services ...

Configuring Data Compression Services3-16303519-A Rev. 00Deleting Data Compression from a RouterTo delete compression from all circuits on the router,

303519-A Rev. 00A-1 Appendix ASite Manager ParametersThis appendix contains the Site Manager parameter descriptions for data compression services. You

Configuring Data Compression ServicesA-2303519-A Rev. 00The Technician Interface allows you to modify parameters by issuing set and commit commands wi

Site Manager Parameters303519-A Rev. 00A-3 To access the WCP Line Interfaces List window, complete the following tasks:The parameter descriptions foll

Configuring Data Compression ServicesA-4303519-A Rev. 00Parameter: Compression ModePath: Configuration Manager > Protocols > WCP > LinesDefau

Site Manager Parameters303519-A Rev. 00A-5 Parameter: History SizePath: Configuration Manager > Protocols > WCP > LinesDefault: 32KOptions: 3

Configuring Data Compression ServicesA-6303519-A Rev. 00Parameter: Buffer SizePath: Configuration Manager > Protocols > WCP > LinesDefault: N

Site Manager Parameters303519-A Rev. 00A-7 Parameter: Fallback Compression ModePath: Configuration Manager > Protocols > WCP > LinesDefault:

Configuring Data Compression ServicesA-8303519-A Rev. 00WCP Circuit Interface ParametersThe WCP Circuit Interfaces List window (Figure A-2) contains t

Site Manager Parameters303519-A Rev. 00A-9 The parameter descriptions follow.Parameter: EnablePath: Configuration Manager > Protocols > WCP >

303519-A Rev. 00viiChapter 3 Customizing Data CompressionAllocating Compression Memory for WCP ...

Configuring Data Compression ServicesA-10303519-A Rev. 00Parameter: History SizePath: Configuration Manager > Protocols > WCP > InterfacesDef

Site Manager Parameters303519-A Rev. 00A-11 Hi/fn LZS Interface ParametersThe Hi/fn LZS Interface List window (Figure A-3) contains Hi/fn LZS interfac

Configuring Data Compression ServicesA-12303519-A Rev. 00To access the Hi/fn LZS Interface List window, complete the following tasks:The parameter des

Site Manager Parameters303519-A Rev. 00A-13 Parameter: Fallback Compression ModePath: Configuration Manager > Protocols > Hi/fn LZS > Interfa

Configuring Data Compression ServicesA-14303519-A Rev. 00PPP Interface Parameters for CompressionThe PPP Interface Lists window contains two parameter

Site Manager Parameters303519-A Rev. 00A-15 Parameter: Compression ProtocolPath: Configuration Manager > Protocols > PPP > InterfacesDefault:

303519-A Rev. 00Index-1Aacronyms, xvBbandwidth-on-demand, 2-13buffer sizedefined, 3-7modifying, 3-8Buffer Size parameter, WCP line, A-6CCCP Type param

Index-2303519-A Rev. 00Eeducational services, xviEnable parameterHi/fn LZS, A-12WCP circuit, A-9WCP line, A-3Engine Type parameterHi/fn LZS, A-12WCP c

303519-A Rev. 00Index-3Ssoftware compressionconfiguring, 1-6deleting, 3-16description, 2-4disabling, 3-14modifying compression protocol, 3-13modifying

303519-A Rev. 00ixFiguresFigure 2-1. CCP and WCP Initialization on a PPP Link ............2-9Figure A-1. WCP Line In