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Advanced Management
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RMON Management
Remote Network Monitoring (RMON) allows the network manager to
gather data on the network’s traffic for future retrieval. RMON is an Internet
Standard defined in RFC1757.
Using RMON, a network monitor (also called a probe) listens to traffic on
the network and gathers statistics that may be retrieved later by a network
management station using SNMP, as described in the previous section.
The four groups of RMON that are supported by the IntraCore 8000 are
described in the following sub-sections.
The IntraCore 8000 switches provide control of the RMON groups only
through SNMP. For information on controlling RMON groups, please refer
to the documentation for your SNMP management application.
For more information about RMON, please see RFC1757, “Remote
Network Monitoring Management Information Base,” available from the
FTP site listed in Appendix A.
Ethernet Statistics Group
The Ethernet statistics group contains statistics measured on each port of the
IntraCore 8000. These are cumulative counters that start at zero each time
the IntraCore 8000 is reset. The Statistics Group is automatically
implemented by the IntraCore 8000.
Ethernet History Group
The Ethernet history group records periodic statistical samples from ports on
the IntraCore 8000 and stores them for later retrieval. A network manager
can use the data to analyze how network traffic has varied over a period of
time.
Alarm Group
The alarm group takes periodic statistical samples from variables in the
IntraCore 8000 and compares them to previously configured thresholds. If
the monitored variable crosses a threshold, an event is generated.
Event Group
The event group controls the generation and notification of events from the
IntraCore 8000. The alarm and event groups together allow the network
manager to configure RMON so that if a particular statistic (such as the
number of bad frames) goes higher than a certain level, the IntraCore 8000
will send a trap to its configured trap receivers, notifying the manager of the