Symbol-technologies Spectrum24 AP-4131 Uživatelský manuál stáhnout pdf (Strana 195)

Monitoring Statistics

AP-4131 Access Point Product Reference Guide 185

3.9.2 Analyzing Retries

The AP keeps statistics of packets with multiple retries. Use these statistics to

identify severe occurrences of retries. Retries occur when the transmitting

station fails to receive an acknowledgment for a transmitted packet. This lack

of acknowledgment can result from:

• two or more stations transmitting simultaneously and causing collisions

• the receiving station moving out of range

• the receiving station being powered off.

Any one of these results causes both devices to suspend transmitting and

retries. Too many retries can indicate a system problem.

To view retry severity:

1. Select Show Misc Statistics from the Main Menu.

2. Select Retry Histogram to display the packets that experience up to 15

retries.

Retries Packets

======= =======

0 65795

1 320

2 112

3 86

4 21

5 12

6 8

7 3

8 0

9 0

10 1

11 0

12 0

13 0

14 0

15 0

3. Press any key to return to the Main Menu.

1 2 ... 190 191 192 193 194 195 196 197 198 199 200 ... 249 250

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Symbol-technologies Spectrum24 AP-4131 Uživatelský manuál Strana 195