CLI Reference Guide

2-47
NET.CFG Options Reference
Link Support Option
BUFFERS communication_number [buffer_size]
Configures the number and size of receive buffers that the Link Support
Layer (LSL) manages.
Communication Number The number of communication buffers must be
large enough to hold all protocol headers and the maximum data size. If you
make many connections, you should increase the number of buffers to
increase performance.
If the protocol you are using builds the media header (MAC) for the LAN
driver, then you need to set the buffer size large enough to manage the
header also.
For example, IPX requires 512 bytes (LAN header) + 74 bytes (protocol
header) + 52 bytes (MAC) = 638 bytes.
See the manufacturer’s specifications for possible parameters and values
required for third-party protocol stacks.
Buffer Size The total buffer size must share a 64KB segment with the
mempool and resident program code from the LSL.COM file when loaded
into memory (approximately 5 KB).
This means that the communication number multiplied by the buffer size
(plus the code size and mempool) cannot be greater than 65,536 bytes.
For example, 20 communication buffers multiplied by a buffer size of 1514
bytes equals 30,280 bytes.
Syntax buffers communication_number [buffer_size]
Replace communication_number with a number of
buffers greater than 1.
Replace buffer_size with a number of bytes greater
than 638.
The buffer size is optional.