user manual

13-12
Cisco Aironet 1200 Series Access Point Software Configuration Guide
OL-2159-05
Chapter 13 Diagnostics and Troubleshooting
Using Diagnostic Pages
• Discarded Packets—The number of packets discarded by the access point due to errors or network
congestion.
• Forwarded Packets—The number of packets transmitted by the port that were acceptable or passable
through the filters.
• Max Retry Packets—The number of times request to send (RTS) reached the maximum retry
number. Click Set Properties to display the AP Radio Hardware page, where you can set the
maximum RTS value.
• Total Retries—The total number of retries that occurred through the radio port.
• Canceled Assoc. Lost—Packets dropped because a client device lost association with the access
point.
• Canceled AID—Packets dropped by a repeater because it roamed to a different parent during a
retransmission attempt.
• Lifetime Exceeded—Fragmented packets that were dropped because it took too long to deliver a
fragment.
• MIC Packets—Total number of packets since system startup for which the access point has
requested MIC to be calculated with the MMH algorithm before being submitted for transmission.
• MIC Errors—Total number of packets which have failed MIC calculation with the MMH algorithm
before being submitted for transmission over this radio since system startup.
• MIC Sequ. Errors—Packets appear to have arrived either very late or out of sequence. This could be
caused by a poor radio link or a replay.
• MIC Auth. Errors—The MIC signature is bad due to a calculation with the wrong cryptographic key.
These errors could be caused by a simple misconfiguration of a WEP key, or by an attack.
Display Options
Figure 13-8 shows the basic AP Radio Port page. Three display options provide more details on the port
configuration and operating statistics. The basic page provides all the information needed to monitor and
administer the port in normal operation. You might need the other display options in comprehensive site
surveys or advanced system troubleshooting. To select a display option, click an option check box and
click Apply.
The display options include:
• Detailed Config.—Details on the radio port configuration, including request to send (RTS) and data
retry settings, firmware and bootblock version levels, and regulatory domain code.
• Detailed Stats.—Twenty additional statistical fields covering packet fragments, collisions, and other
errors.
• Individual Rates—Data transmission statistics for each data rate (1, 2, 5, and 11 Mbps).