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C H A P T E R 19 Status Monitoring and Statistics
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A typical RMON setup consists of two components:
• RMON probe—An intelligent, remotely controlled device or
software agent that continually collects statistics about a LAN
segment or VLAN. The probe transfers the information to a
management workstation on request, or when a predefined
threshold is crossed.
• Management workstation—Communicates with the RMON
probe and collects the statistics from it. The workstation does not
have to be on the same network as the probe, and can manage the
probe by in-band or out-of-band connections.
You can only use the RMON features of the system if you have an
RMON management application, and have enabled RMON on the
switch.
RMON Features
The IETF defines nine groups of Ethernet RMON statistics. The
480T routing switch supports four of these groups:
• Statistics
• History
• Alarms
• Events
Statistics
The RMON Ethernet Statistics group provides traffic and error
statistics showing packets, bytes, broadcasts, multicasts, and errors
on a LAN segment or VLAN.
Information from the Statistics group is used to detect changes in
traffic and error patterns in critical areas of the network.
History
The History group provides historical views of network
performance by taking periodic samples of the counters supplied by
the Statistics group. The History group features user-defined
sample intervals and bucket counters for complete customization of
trend analysis.