Avaya Configuring Data Compression Services Bedienungsanleitung PDF herunterladen (Seite 43)

Customizing Data Compression

114061 Rev. A 3-5

• Number of resets.

Increase the buffer size for a link with a large number of resets and a low

number of dropped packets. Be aware, however, that a high number of resets

may occur for reasons unrelated to buffer size.

Conﬁguring Hardware Compression

There are two issues speciﬁc to hardware compression.

Selecting Software or Hardware Compression Engines

When you conﬁgure a VC for compression, the default compression type varies.

The default is software compression for link modules that do not support

hardware compression; for those that do, the default is hardware (refer to

“Hardware Compression” in Chapter 2). The default for a net module is software

compression, unless the ASN has a hardware compression net module. If an ASN

has a hardware compression net module, the default is hardware.

You can use software compression even though you are using a hardware

compression daughterboard or net module. Bay Networks recommends that you

use hardware compression for connections greater than 512 Kb/s. You would also

want to specify software compression for VCs in excess of the number of contexts

your hardware compression daughterboard or net module can support.

Conﬁgure a VC to use software compression by setting the Engine Type

parameter to software.

Note: X.25 is a reliable protocol, which means that it has features that check

for errors and prevent data loss. Bay Networks data compression software

therefore ignores the Buffer Size parameter for X.25, so if you are conﬁguring

compression for X.25, you do not need to set this parameter.

Site Manager: Buffer Size parameter: page A-4 (line)

Site Manager: Engine Type parameter: page A-4 (line); page A-8 (circuit interface)

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Avaya Configuring Data Compression Services Bedienungsanleitung Seite 43