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Chapter 5: Using the Web-based Utility for Configuration
Statistics Tab - RMON History
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
CRC & Align Errors. Displays the number of CRC and Align errors that have occurred on the interface since the
device was last refreshed.
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.
Frames of xx Bytes. Number of xx-byte frames received on the interface since the device was last refreshed.
Clear Counters button. This option will reset all of the statistic counts.
Refresh Now button. Use this option to refresh the statistics.
Statistics Tab - RMON History
The RMON History screen allows you to monitor your network for common errors and overall traffic rates. The
History Control Table allows you to add, edit and delete collection entries, or to select a specific index entry and
then view the historical data in table form.
History Control Table
Source Interface. Displays the interface from which the history samples were taken. The possible field values
are:
• Port. Specifies the port from which the RMON information was taken.
• LAG. Specifies the port from which the RMON information was taken.
Figure 5-18: Statistics - RMON History
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