Cisco AIR-PCI340 Installation And Configuration Manual page 157

Chapter 7 Performing Diagnostics
The statistics are calculated as soon as your client adapter is started or the Reset button is selected and
are continually updated at the rate specified by the Screen Update Timer. Instructions for changing the
Screen Update Timer setting are provided in
Table 7-4
Table 7-4
Statistic
Receive Statistics
Multicast Packets Received
Broadcast Packets Received
Unicast Packets Received
Bytes Received
Beacons Received
RM Requests Received
Total Packets Received OK
Duplicate Packets Received
Overrun Errors
PLCP CRC Errors
PLCP Format Errors
PLCP Length Errors
MAC CRC Errors
Cisco Aironet 340, 350, and CB20A Wireless LAN Client Adapters Installation and Configuration Guide for Windows
OL-1394-07
describes each statistic that is displayed for your client adapter.
Client Adapter Statistics
Table 7-2.
Description
The number of multicast packets that were received successfully.
The number of broadcast packets that were received successfully.
The number of unicast packets that were received successfully.
The number of bytes of data that were received successfully.
The number of beacon packets that were received successfully.
The number of valid radio management (RM) request frames that
were received successfully.
Note This field is displayed only if RM is enabled.
The number of all packets that were received successfully.
The number of duplicate packets that were received successfully.
The number of packets received when no receive buffers were
available. These errors usually occur when the host does not read
the received packets from the client adapter fast enough.
The number of times the client adapter started to receive an
802.11 physical layer convergence protocol (PLCP) header but
the rest of the packet was ignored because a cyclic redundancy
check (CRC) error was found in the header.
CRC errors can be attributed to packet collisions caused
Note
by a dense population of client adapters, overlapping
access point coverage on a channel, high multipath
conditions from bounced signals, or the presence of other
2.4-GHz signals from devices such as microwave ovens,
wireless handset phones, etc.
The number of times an 802.11 PLCP header was received with a
valid CRC but the rest of the packet was ignored because an
unknown value was found in the header.
The number of times an 802.11 PLCP header was received but the
rest of the packet was ignored because an illegal header length
was found.
The number of packets that had a valid 802.11 PLCP header but
contained a CRC error in the data portion of the packet.
Note CRC errors can be attributed to packet collisions caused
by a dense population of client adapters, overlapping
access point coverage on a channel, high multipath
conditions from bounced signals, or the presence of other
2.4-GHz signals from devices such as microwave ovens,
wireless handset phones, etc.
Viewing Statistics for Your Client Adapter
7-13