Cisco Cisco Aironet Wireless LAN Client Especificaciones descargar pdf (Pagina 74)

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Cisco Aironet Wireless LAN Client Adapters Installation and Configuration Guide for Linux

OL-1376-02

Chapter 5 Advanced Configuration

Overview

Click OK at the bottom of the RF Network screen to save any changes.

Data Retries Defines the number of times a packet is resent if the initial transmission

is unsuccessful.

Range: 1 to 128

Default: 16

Note If your network protocol performs its own retries, set this to a

smaller value than the default. This way notification of a bad

packet is sent up the protocol stack quickly so that the

application can retransmit the packet if necessary.

Fragment Threshold Defines the threshold above which an RF data packet is split up or

fragmented. If one of those fragmented packets experiences

interference during transmission, only that specific packet needs to be

resent.

Throughput is generally lower for fragmented packets because the fixed

packet overhead consumes a higher portion of the RF bandwidth.

Range: 256 to 2312

Default: 2312

Note An advantage of a large packet size is increased throughput

while the disadvantage is the potential for more retries, which

reduce the throughput depending on prevailing conditions. For

example, if a nearby microwave oven is sending out

interference spikes for every 700 bytes of transmission time, a

fragment size of 500 byte packets might be able to straddle the

interference. However, a packet size of 2048 bytes could be

interrupted halfway through its transmission, and would have to

be retransmitted. If a 2048 byte packet were retransmitted 2 or

3 times, the net throughput would be lower than if a 500 byte

packet been used.

Table 5-4 RF Network Parameters (continued)

Parameter Description

1 2 ... 69 70 71 72 73 74 75 76 77 78 79 ... 141 142

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