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DEVICE/BOARD/PORT COUNTERS
3.1.2
Device/Board/Port/Counters Screen Fields
The following briefly explains each field in the DEVICE/BOARD/PORT
COUNTERS Screen. Counter information is displayed separately on the
screen for the whole Device (IRM2), the selected board, and the selected
port.
Bytes Received:
Displays the number of bytes received.
Packets:
Displays the total number of packets received or transmitted.
Errors:
Displays the total number of errors detected.
Receive Collisions:
Displays the number of collisions received.
Transmit Collisions:
Displays the number of collisions generated during transmission.
Out of Window Collisions:
Displays the number of collisions out of the standard collisions window
(51.2 s) due to a network problem.
Runt Packets:
Displays the number of runt packets received from the network. A runt
packet is one that is less than the minimum Ethernet frame size of 64
bytes not including preamble.
No Resources Available:
Displays the number of times the IRM2 is too involved in the repeating
process to accurately classify received packets (i.e. Runt, CRC, Giant,
etc.) This error has no effect on the throughput of the device or its ability
to repeat.
Frame Alignment Errors:
Displays the number of errors due to misaligned packets.
CRC Errors:
Displays the number of packets with bad Cyclical Redundancy Checks
(CRC) received from the network.
3-3
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