Asante IntraCore 6524, User Manual

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Advanced Management
Page 4-8
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 6524 are
described in the following sub-sections.
The IntraCore 6524 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 6524. These are cumulative counters that start at zero each time the
IntraCore 6524 is reset. The Statistics Group is automatically implemented by
the IntraCore 6524.
Ethernet History Group
The Ethernet history group records periodic statistical samples from ports on
the IntraCore 6524 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 6524 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 6524. 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 6524 will
send a trap to its configured trap receivers, notifying the manager of the event.
For information on configuring trap receivers, see “SNMP Configuration” in
Chapter 3.