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50 Configuring and Monitoring the Switch DNswitch 800
RMON Statistics
RMON Statistics display key statistics for each port from RMON group 1.
(RMON groups 2, 3 and 9 can only be accessed using SNMP
management software.) The following screen displays overall statistics on
traffic passing through each port. RMON statistics provide access to a
broad range of statistics, including a total count of different frame types
passing through each port. Values displayed have been accumulated
since the last system reboot.
Figure 3-42. RMON Statistics
Parameter Description
Drop Events The total number of events in which packets were dropped due
to lack of resources.
Received Bytes Total number of bytes of data received on the network. This
statistic can be used as a reasonable indication of Ethernet
utilization.
Received Frames The total number of frames (bad, broadcast and multicast)
received.
Broadcast Frames The total number of good frames received that were directed to
the broadcast address. Note that this does not include multicast
packets.
Multicast Frames The total number of good frames received that were directed to
this multicast address.
CRC/Alignment
Errors
The number of frames received with CRC/alignment errors
(FCS or alignment errors).
Undersize Frames The total number of frames received that were less than 64
octets long (excluding framing bits, but including FCS octets)
and were otherwise well formed.
Oversize Frames The total number of frames received that were longer than 1518
octets (excluding framing bits, but including FCS octets) and
were otherwise well formed.
Fragments The total number of frames received that were less than 64
octets in length (excluding framing bits, but including FCS
octets) and had either an FCS or alignment error.
Jabbers The total number of frames received that were longer than 1518
octets (excluding framing bits, but including FCS octets), and
had either an FCS or alignment error.