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Table 7-10: RoamAbout AP Classic and 2000) PC Card Counters
Counter Description
Individually addressed
frames sent
(TxUnicastFrames)
Number of messages sent by the PC Card that are destined for another
wireless device. In most LAN applications, it is normal behavior for this
counter to have a high value and continuously increase (you can see it run).
For example, this counter should increase rapidly when running the Link
Test.
Multicast frames sent
(TxMulticastFrames)
Total number of messages sent by the PC Card as broadcast or multicast
(destined at multiple other devices). In most LAN applications, multicast
messages are regularly sent. Typically, this counter shows a lower value
than the TxUnicastFrames counter.
Fragments Sent
(TxFragments)
Total number of messages or message fragments sent by the PC Card. The
running rate of this counter is a general indication of activity at this wireless
device. The number in this counter should be greater than the sum of
TxUnicastFrames and TxMulticastFrames.
Individually addressed bytes
sent (TxUnicastOctets)
Total number of bytes transmitted by the PC Card as part of unicast
messages. Normal behavior for this counter shows a relatively high value
that is increasing rapidly.
Multicast bytes sent
(TxMulticastOctets)
Total number of bytes transmitted by the PC Card as part of multicast
messages. This value is expected to be a large number.
Deferred Transmissions
(TxDeferredTransmissions)
Number of times the PC Card deferred a transmission to avoid collisions
with messages transmitted by other devices. Deferral is normal behavior for
802.11 devices. A relatively high value for this counter identifies a wireless
network with lots of activity.
Single retry frames sent
(TxSingleRetryFrames)
Number of messages that were retransmitted a single time before being
acknowledged by the receiving device. Retransmission is a normal behavior
for the IEEE 802.11 protocol in order to recover quickly from lost
messages. A relatively high value for this counter in comparison with the
TxFragments counter identifies a wireless network that suffers from
interference (noise) or a heavy load of wireless data traffic.
See also TxMultipleRetryFrames.
Multiple retry frames sent
(TxMultipleRetryFrames)
Number of messages that were retransmitted multiple times before being
acknowledged by the receiving device. Retransmission is a normal behavior
for the IEEE 802.11 protocol in order to recover quickly from lost
messages. A relatively high value for this counter in comparison with the
TxFragments counter identifies a wireless network that suffers from
interference (noise) or a heavy load of wireless data traffic.
High values for this counter could result in lower throughput for the PC
Card if the system falls back to the next lower transmit rate when more than
one retransmission retry is needed to transfer a message.
See also TxSingleRetryFrames.