Extreme Networks EPICenter 4.1, Software Installation Manual

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268 EPICenter Software Installation and User Guide
Real-Time Statistics
You can view the following types of data:
• Percent Utilization for each port in the set (device, port group, or single port).
Percent utilization reports the value of the etherHistoryUtilization MIB object. The MIB defines this
variable as follows:
• Total Errors for each port in the set (device, port group, or single port).
Total Errors is the sum of the six error variables shown in Table 10.
• Individual Errors for a single port.
An individual errors display shows the six variables shown in Table 10.
You can choose to have the component tree show the device name only, the device name followed by
the IP address in parentheses, or the device IP address followed by the device name in parentheses. See
Chapter 16, “Administering EPICenter” for more details about how to display the device in the
component tree.
Table 9: Definition of RMON Utilization Variable Used in Port Utilization Displays
etherHistoryUtilization The best estimate of the mean physical layer network utilization on this
interface during this sampling interval, graphed in percents.
Table 10: Definition of RMON etherHistory Error Variables for Port Error Displays
etherHistoryCRCAlignErrors The number of packets received during this sampling interval that had a
length between 64 and 1518 octets, inclusive (excluding framing bits but
including Frame Check Sequence (FCS) octets), but that had either a bad
FCS with an integral number of octets (FCS Error) or a bad FCS with a
non-integral number of octets (Alignment Error).
etherHistoryUndersizePkts The number of packets received during this sampling interval that were
less than 64 octets long (excluding framing bits but including FCS octets)
and were otherwise well formed.
etherHistoryOversizePkts The number of packets received during this sampling interval that were
longer than 1518 octets (excluding framing bits but including FCS octets)
but were otherwise well formed.
etherHistoryFragments The total number of packets received during this sampling interval that
were less than 64 octets in length (excluding framing bits but including FCS
octets) had either a bad Frame Check Sequence (FCS) with an integral
number of octets (FCS Error) or a bad FCS with a non-integral number of
octets (Alignment Error).
etherHistoryJabbers The number of packets received during this sampling interval that were
longer than 1518 octets (excluding framing bits but including FCS octets),
and had either a bad Frame Check Sequence (FCS) with an integral
number of octets (FCS Error) or a bad FCS with a non-integral number of
octets (Alignment Error).
etherHistoryCollisions The best estimate of the total number of collisions on this Ethernet
segment during this sampling interval.