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RMON Statistics 4-3
Statistics
peak value for each statistic, and the date and time that peak occurred. Note that
peak values are always Delta values; see Viewing Total, Delta, and Accumulated
Statistics, on page 4-5, for more information.
Ethernet statistics are:
Bytes
Displays the total number of bytes contained in packets processed on the network
segment. This number includes bytes contained in error packets.
Packets
Displays the total number of packets processed on the network segment. Again,
this number includes error packets.
Drop Events
This Þeld indicates the number of times packets were dropped because the device
could not keep up with the ßow of trafÞc on the network. Note that this value
does not reßect the number of packets dropped, but only the number of times
packets were dropped.
% Load
Displays the network segment load during the sample interval, in hundredths of
a percent; this percentage reßects the network segment load compared to the
theoretical maximum load (10 Mbits/sec) of an Ethernet network.
Packet Type
Multicast Indicates the number of good packets processed on the network
segment that were destined for more than one address. Note that
this total does not include broadcast packets.
Broadcast Indicates the number of good packets processed on the network
segment that had the broadcast (FF-FF-FF-FF-FF-FF) destination
address.
Unicast Indicates the number of good packets processed on the network
segment that were destined for a single address.
The percentages displayed to the right of the numerical values for these Þelds
indicate what percentage of good packets transmitted on the network segment
were multicast, broadcast, and unicast; these percentages will add up to 100. The
pie chart in the center of the window provides a graphical view of the percentage
breakdown; colors in the pie chart correspond to colors in the percentage display
boxes. Values listed to the right of the pie chart indicat peak delta values recorded
since the statistics screen was launched, and the date and time they occurred.
Problems
CRC/Alignment Indicates the number of packets processed by the
network segment that had a non-integral number of
bytes (alignment error) or a bad frame check sequence
(Cyclic Redundancy Check, or CRC error).