Avaya Configuring Data Compression Services Manual do Utilizador

Part No. 117352-A Rev. ASeptember 1997BayRS Version 12.00Site Manager Software Version 6.00 Configuring Data Compression Services

117352-A Rev. A xi Tables Table 3-1. Hardware Compression -- 8 KB Contexts ...3-3Table 3-2. Hardware Com

117352-A Rev. A xiii About This Guide If you are responsible for configuring and managing Bay Networks ® routers and/or BayStream ™ switching platf

Configuring Data Compression Servicesxiv 117352-A Rev. A Conventions bold text Indicates text that you need to enter, command names, and buttons in m

About This Guide 117352-A Rev. A xv Acronyms CCP Compression Control ProtocolCPC continuous packet compressionCRC cyclic redundancy checkDDN Defense

Configuring Data Compression Servicesxvi 117352-A Rev. A Bay Networks Customer Service You can purchase a support contract from your Bay Networks dis

About This Guide 117352-A Rev. A xvii For More Information For information about Bay Networks and its products, visit the Bay Networks World Wide We

117352-A Rev. A 1-1 Chapter 1Starting Compression The quickest way to begin using data compression on your network is to enable it with the default

ii 117352-A Rev. A4401 Great America Parkway 8 Federal StreetSanta Clara, CA 95054 Billerica, MA 01821 Copyright © 1997 Bay Networks, Inc. All rights

Configuring Data Compression Services1-2 117352-A Rev. A For further information about these steps, refer to Configuring and Managing Routers with Si

Starting Compression 117352-A Rev. A 1-3 Starting Data Compression You enable data compression for PPP and Frame Relay differently from X.25. Starti

Configuring Data Compression Services1-4 117352-A Rev. ADeleting Data Compression from a PlatformTo delete WCP from all circuits on the router, follow

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

Configuring Data Compression Services2-2 117352-A Rev. AData Compression ArchitectureBay Networks uses the following algorithm and protocols to provid

Data Compression Overview117352-A Rev. A 2-3 Data Compression PerformanceThe goals in using data compression are to achieve a high compression ratio w

Configuring Data Compression Services2-4 117352-A Rev. AHardware Compression for the BNThe compression daughterboards for the BN are• AG2104037 - Octa

Data Compression Overview117352-A Rev. A 2-5 The only difference between the 32-contexts and 128-contexts Bay Networks compression daughterboards and

Configuring Data Compression Services2-6 117352-A Rev. AFigure 2-1. CCP, WCP, and NCP Initialization on a PPP LinkRouter A Router B1. PPP interface o

Data Compression Overview117352-A Rev. A 2-7 CCP NegotiationsCCP allows the two ends of a PPP connection to negotiate whether to use data compression,

117352-A Rev. A iii Bay Networks, Inc. Software License Agreement NOTICE: Please carefully read this license agreement before copying or using the

Configuring Data Compression Services2-8 117352-A Rev. ACompression Features for Specific ProtocolsBay Networks data compression services vary in some

Data Compression Overview117352-A Rev. A 2-9 The backup circuit can inherit the primary’s configuration, or it can use its own. When the Frame Relay pr

Configuring Data Compression Services2-10 117352-A Rev. AFor more information about Bay Networks multiline, see Configuring WAN Line Services.PPP Multi

Data Compression Overview117352-A Rev. A 2-11 X.25 ServicesAn X.25 network permits as many as 128 VCs to exist on the same physical link at the same t

Configuring Data Compression Services2-12 117352-A Rev. ASoftware-Based Data CompressionSoftware-based data compression works over WAN links running F

117352-A Rev. A 3-1 Chapter 3Customizing Data CompressionWhen you enable data compression, default values are in effect for all parameters (see parame

Configuring Data Compression Services3-2 117352-A Rev. AIf either side of the link specifies PPC, both sides of the link use PPC.Maximizing ThroughputE

Customizing Data Compression117352-A Rev. A 3-3 History Size with Hardware CompressionHardware compression daughterboards and net modules are availabl

Configuring Data Compression Services3-4 117352-A Rev. AYou can mix 8 KB and 32 KB contexts on either board. Be aware that if you are bringing VCs up

Customizing Data Compression117352-A Rev. A 3-5 • Number of resets.Increase the buffer size for a link with a large number of resets and a low number

iv 117352-A Rev. A its own data and information and for maintaining adequate procedures apart from the Software to reconstruct lost or altered files,

Configuring Data Compression Services3-6 117352-A Rev. ASelecting a Fallback Compression ModeFallback compression mode is configurable on a line basis

117352-A Rev. A A-1 Appendix AData Compression ParametersWCP Line ParametersUse the following descriptions to set Bay Networks data compression line p

Configuring Data Compression ServicesA-2 117352-A Rev. AParameter: Compression ModePath: Configuration Manager > Protocols > WCP > LinesDefaul

Data Compression Parameters117352-A Rev. A A-3 Parameter: History SizePath: Configuration Manager > Protocols > WCP > LinesDefault: 32 KOption

Configuring Data Compression ServicesA-4 117352-A Rev. AParameter: Buffer SizePath: Configuration Manager > Protocols > WCP > LinesDefault: No

Data Compression Parameters117352-A Rev. A A-5 WCP Circuit Interface ParametersUse the following descriptions to set Bay Networks data compression.Par

Configuring Data Compression ServicesA-6 117352-A Rev. AParameter: Compression ModePath: Configuration Manager > Protocols > WCP > InterfacesD

Data Compression Parameters117352-A Rev. A A-7 Parameter: History SizePath: Configuration Manager > Protocols > WCP > InterfacesDefault: Inher

Configuring Data Compression ServicesA-8 117352-A Rev. AParameter: Engine TypePath: Configuration Manager > Protocols > WCP > InterfacesDefaul

117352-A Rev. A Index-1Aallocating memory, 3-1Bbandwidth-on-demand, 2-10Bay Networks Press, xvBay Networks World Wide Web page, xviibuffer size, 3-4Cc

117352-A Rev. A v Contents About This Guide Before You Begin ...

Index-2 117352-A Rev. ALLempel-Ziv (LZ-77) algorithm, 2-2line parameters, A-1 to A-5MMax Window Size parameter (X.25), 2-11maximizing compression, 3-1

vi 117352-A Rev. A Hardware Compression ...2-3Hardwar

117352-A Rev. A viiConfiguring Hardware Compression ...3-5Selecting Softwa

117352-A Rev. A ix Figures Figure 2-1. CCP, WCP, and NCP Initialization on a PPP Link .........2-6