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Chapter 5: Using the Web-based Utility for Configuration
Statistics Tab - RMON Alarm
WebView Switches
Undersize Packets. Displays the number of undersized packets (less than 64 octets) received on the interface
since the device was last refreshed.
Oversize Packets. Displays the number of oversized packets (over 1518 octets) received on the interface since
the device was last refreshed.
Fragments. Displays the number of fragments (packets with less than 64 octets, excluding framing bits, but
including FCS octets) received on the interface since the device was last refreshed.
Jabbers. Displays the total number of received packets that were longer than 1518 octets. This number excludes
frame bits, but includes FCS octets that had either a bad Frame Check Sequence (FCS) with an integral number of
octets (FCS Error) or a bad FCS with a non-integral octet (Alignment Error) number. The field range to detect
jabbers is between 20 ms and 150 ms.
Collisions. Displays the number of collisions received on the interface since the device was last refreshed.
Utilization. Displays the percentage of the interface utilized.
Statistics Tab - RMON Alarm
The RMON Alarm screen contains fields for setting network alarms. Network alarms occur when a network
problem, or event, is detected. Rising and falling thresholds generate events.
Alarm Entry. Indicates a specific alarm.
Source Interface. Displays the interface for which RMON statistics are displayed. The possible field values are:
• Port. Displays the RMON statistics for the selected port.
• LAG. Displays the RMON statistics for the selected LAG.
Counter Name. Displays the selected MIB variable.
Sample Type. Defines the sampling method for the selected variable and comparing the value against the
thresholds. The possible field values are:
• Absolute. Compares the values directly with the thresholds at the end of the sampling interval.
• Delta. Subtracts the last sampled value from the current value. The difference in the values is compared
to the threshold.
Figure 5-19: Statistics - RMON Alarm