Motorola Solutions AP-6511 Access Point System Reference Guide
13-40
The
Receive Errors
filed displays the following information:
The
Transmit Errors
field displays the following:
MAC Receive
Error
Displays the number of received packets failed because of an internal MAC
sublayer that is not late collision, excessive collisions, or carrier sense error.
Bad CRC
Displays the CRC error. The
Cyclical Redundancy Check
(CRC) is the 4 byte
field at the end of every frame. The receiving station uses it to interpret if the
frame is valid. If the CRC value computed by the interface does not match the
value at the end of the frame, it’s considered a bad CRC.
Rx Frame Errors
Displays the number of frame errors received at the interface. A frame error
occurs when a byte of data is received but not in the format expected.
Rx Length Errors
Displays the number of length errors received at the interface. Length errors
are generated when the received frame length was less than or exceeded the
Ethernet standard.
Rx FIFO Errors
Displays the number of FIFO errors received at the interface. First-in First-out
queueing is an algorithm that involves buffering and forwarding of packets in
the order of arrival. FIFO entails no priority for traffic. There is only one queue,
and all packets are treated equally.
Rx Missed Errors
Displays the number of missed packets. Packets are missed when the
hardware received FIFO has insufficient space to store the incoming packet.
Rx Over Errors
Displays the number of overflow errors. An overflow occurs when packet size
exceeds the allocated buffer size.
Tx Errors
Displays the number of packets with errors transmitted on the interface.
Tx Dropped
Displays the number of transmitted packets dropped from the interface.
Tx Aborted
Errors
Displays the number of packets aborted on the interface because a
clear-to-send request was not detected.
Tx Carrier Errors
Displays the number of carrier errors on the interface. This generally indicates
bad Ethernet hardware or cabling.
Tx FIFO Errors
Displays the number of FIFO errors received at the interface. First-in first-out
queueing is an algorithm that involves buffering and forwarding packets in
the order of arrival. FIFO entails no priority for traffic. There is only one queue,
and all packets are treated equally.
Tx Heartbeat
Errors
Displays the number of heartbeat errors. This generally indicates a software
crash or packets stuck in an endless loop.
Tx Window
Errors
Displays the number of window errors transmitted. TCP uses a sliding
window flow control protocol. In each TCP segment, the receiver specifies the
amount of additional received data (in bytes) in the receive window field the
receiver is willing to buffer for the connection. The sending host can send only
up to that amount. If the sending host transmits more data before receiving
an acknowledgement from the receiving host, it constitutes a window error.
Summary of Contents for AP-6511
Page 1: ...Motorola Solutions AP 6511 Access Point System Reference Guide ...
Page 2: ...Motorola Solutions AP 6511 Access Point System Reference Guide 1 2 ...
Page 24: ...Motorola Solutions AP 6511 Access Point System Reference Guide 2 12 ...
Page 318: ...Motorola Solutions AP 6511 Access Point System Reference Guide 10 16 ...
Page 409: ...Statistics 13 49 Figure 13 31 Access Point Firewall Packet Flow screen ...
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