Brocade Mobility RFS Controller System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 921)

Brocade Mobility RFS Controller System Reference Guide 909
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The Errors table displays the following:
The Receive Errors table displays the following:
Ucast Pkts Sent Displays the number of unicast packets sent through the interface.
Ucast Pkts Received Displays the number of unicast packets received through the interface.
Bcast Pkts Sent Displays the number of broadcast packets sent through the interface.
Bcast Pkts Received Displays the number of broadcast packets received through the interface.
Packet Fragments Displays the number of packet fragments transmitted or received through the interface.
Jabber Pkts Displays the number of packets transmitted through the interface larger than the MTU.
Bad Pkts Received Displays the number of bad packets received through the interface.
Collisions Displays the number of collisions over the selected interface.
Late Collisions A late collision is any collision that occurs after the first 64 octets of data have been sent. Late
collisions are not normal, and usually the result of out of specification cabling or a malfunctioning
device.
Excessive Collisions Displays the number of excessive collisions. Excessive collisions occur when the traffic load
increases to the point a single Ethernet network cannot handle it efficiently.
Drop Events Displays the number of dropped packets transmitted or received through the interface.
Tx Undersize Pkts Displays the number of undersized packets transmitted through the interface.
Oversize Pkts Displays the number of oversized packets transmitted through the interface.
MAC Transmit Error Displays the number of failed transmits due to an internal MAC sublayer error (that’s not a late
collision), due to excessive collisions or a carrier sense error.
MAC Receive Error Displays the number of received packets that failed due to an internal MAC sublayer (that’s not a
late collision), an excessive number of collisions or a carrier sense error.
Bad CRC Displays the CRC error. The 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 frame, it is considered as a bad CRC.
Rx Frame Errors Displays the number of frame errors received at the interface. A frame error occurs when data is
received, but not in an expected format.
Rx Length Errors Displays the number of length errors received at the interface. Length errors are generated when
the received frame length was either less or over 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. 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.