Specifications

Chapter 4 - Operation and Administration Menus and Parameters
BreezeACCESS 4900 94 System Manual
The unit transmits valid data frames received from the wireless medium 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
unicast data frame is transmitted, the unit waits for an acknowledgement (ACK)
message from the receiving unit. Some control and wireless management frames,
as well as broadcast and multicast frames sent to more than one unit, are not
acknowledged. If an ACK is not received after a predefined time, which is
determined by the Maximum Cell distance parameter, 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/CIR mechanism (for more information see
“Traffic Prioritization” on page 183).
Broadcasts/multicasts are routed to the Medium queue (applicable only for AU).
Control and wireless management frames generated in the unit are routed to the
High queue.
Any frame coming from the Ethernet port, which is meant to reach another
BreezeACCESS 4900 unit whose MAC address is present in the Association
database via the wireless port (as opposed to messages intended for stations