Avaya Configuring Data Compression Services Manual de usuario descargar pdf (Pagina 58)

Configuring Data Compression Services

3-8

117352-E Rev 00

Preventing Data Loss for PPP and Frame Relay

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

You must configure the Buffer Size 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 size based on the following

conditions:

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

A Normal buffer size is usually large 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 high number of dropped packets, increase the buffer size. For

a link with a very low number of dropped packets, decrease the buffer size,

even to None, to conserve memory.

• Number of resets

For a link with a high 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.

Using the BCC

To modify the buffer size, navigate to the appropriate line (for example,

box

;

wcp

;

wcp-line/serial/3/1/0

), and enter

buffer-size <

size

size is none, normal, large, or very-large.

For example:

box#

wcp

wcp#

wcp-line/serial/3/1/0

wcp-line/serial/3/1/0#

buffer-size very-large

wcp-line/serial/3/1/0#

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.

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