Alvarion BreezeNET B System Manual page 80

Chapter 4 - Operations
Reset Counters: Select this option to reset the counters.
4.2.5.1.1 Ethernet Counters
The unit receives Ethernet frames from its Ethernet port and forwards the frames
to its internal bridge, which determines whether each frame should be
transmitted to the wireless media. Frames discarded by the unit's hardware filter
are not counted by the Ethernet counters. The maximum length of a regular IEEE
802.1 Ethernet frame that can be accepted from the Ethernet port is 1518 bytes.
For tagged 802.1Q frames the maximum size is 1522 bytes.
The unit transmits valid data frames received from the wireless media to the
Ethernet port, as well as internally generated frames, such as responses to
management queries and pings received via the Ethernet port. The Ethernet
Counters include the following statistics:
Total received frames via Ethernet: The total number of frames received
from the Ethernet port. This counter includes both invalid frames (with errors)
and valid frames (without errors).
Transmitted wireless to Ethernet: The number of frames transmitted by the
unit to the Ethernet port. These are generally frames received from the
wireless side, but also include frames generated by the unit itself.
4.2.5.1.2 WLAN Counters
The unit submits data frames received from the Ethernet port to the internal
bridge, as well as self generated control and wireless management frames. After a
data frame is transmitted, the unit waits for an acknowledgement (ACK) message
from the receiving unit. Some control and wireless management frames are not
acknowledged. If an ACK is not received after a predefined time, the unit
retransmits the frame until an ACK is received. If an ACK is not received before
the number of retransmissions has reached a maximum predefined number,
which is determined by the Number of HW Retries parameter, the frame is
dropped.
Each packet to be transmitted to the wireless link is transferred to one of three
queues: Low, Medium and High. Packets in the High queue have the highest
priority for transmission, and those in the Low queue have the lowest priority.
The packets in the High queue will be transmitted first. When this queue is
emptied, the packets in the Medium queue will be sent. Finally, when both the
High and Medium queues are empty, the packets in the Low queue will be sent.
Data packets are routed to either the High or Low queue, according to the queue
selected for them before the MIR mechanism (for more information see section
4.2.6.6.3).
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BreezeNET B System Manual