Avaya Configuring Data Compression Services Manual de usuario descargar pdf (Pagina 55)

Customizing Data Compression

117352-B Rev. 00

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Preventing Data Loss for PPP and Frame Relay

Buffer size is the amount of memory allocated to keep the transmission history.

You must configure this parameter to protect against data loss if you run PPP or

frame relay. You can use a buffer size of None, Normal, Large, or Very Large. The

default value is Normal. Configure buffer space based on the following

conditions:

• Length of time it takes for data to travel over the link.

A Normal buffer size is usually enough for a coast-to-coast connection within

the United States. You may need a Large or Very Large buffer if your link is

over a satellite connection.

• Number of dropped packets.

For a link with a large number of dropped packets, increase the buffer size.

For a link with a very small number of dropped packets, decrease the buffer

size, even to None, to conserve memory.

• Number of resets.

For a link with a large number of resets and a low number of dropped packets,

increase the buffer size. Be aware, however, that a high number of resets may

occur for reasons unrelated to buffer size.

Modifying the Buffer Size

To protect against data loss, modify the Buffer Size parameter. To modify this

parameter, access the WCP Line Interfaces List window.

For information on accessing configuration windows, refer to “Accessing

Configuration Windows” on page 3-2. For parameter descriptions, refer to

Appendix A, “Data Compression Parameters.”

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

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.

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Avaya Configuring Data Compression Services Manual de usuario Pagina 55