Brocade Mobility Access Point System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 784)

774 Brocade Mobility Access Point System Reference Guide
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The Transmit Errors field displays the following:
Network Graph
Interfaces
The Network Graph displays statistics the access point continuously collects for its interfaces. Even
when the interface statistics graph is closed, data is still collected. Display the interface statistics
graph periodically for assessing the latest interface information. Up to three different stats can be
selected and displayed within the graph.
To view a detailed graph for an interface, select an interface and drop it on to the graph. The graph
displays Port Statistics as the Y-axis and the Polling Interval as the X-axis. Use the Polling Interval
from-down menu to define the increment data is displayed on the graph.
To view the Interface Statistics graph:
1. Select the Statistics menu from the Web UI.
2. Select System from the navigation pane (on the left-hand side of the screen). Expand a RF
Domain and select one of its connected access points.
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. There is only one queue, and all packets
are treated equally. An increase in FIFO errors indicates a probable hardware
malfunction.
Rx Missed Errors Displays the number of missed packets. Packets are missed when the hardware
received FIFO has insufficient space to store an incoming packet.
Rx Over Errors Displays the number of overflow errors received. Overflows occur when a 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 bad cabling.
Tx FIFO Errors Displays the number of FIFO errors transmitted at the interface. First-in First-Out
(FIFO) queueing is an algorithm that involves the buffering and forwarding of
packets in the order of arrival. FIFO uses no priority. There is only one queue, and
all packets are treated equally. An increase in the number of FIFO errors
indicates a probable hardware malfunction.
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) 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 acknowledgment, it constitutes a
window error.
Refresh Select Refresh to update the statistics counters to their latest value.