H3C Technologies H3C S7500E Series Switches - Manual (Page 135)

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RMON Configuration
When configuring RMON, go to these sections for information you are interested in:
z RMON Overview
z Configuring the RMON Statistics Function
z Configuring the RMON Alarm Function
z Displaying and Maintaining RMON
z Ethernet Statistics Group Configuration Example
z History Group Configuration Example
z Alarm Group Configuration Example
z Private Alarm Group Configuration Example
RMON Overview
This section covers these topics:
z Introduction
z RMON Groups
Introduction
Remote Monitoring (RMON) is used to realize the monitoring and management from the
management devices to the managed devices on the network by implementing such functions
as statistics and alarm. The statistics function enables a managed device to periodically or
continuously track various traffic information on the network segments connecting to its ports,
such as total number of received packets or total number of oversize packets received. The
alarm function enables a managed device to monitor the value of a specified MIB variable, log
the event and send a trap to the management device when the value reaches the threshold,
such as the port rate reaches a certain value or the potion of broadcast packets received in the
total packets reaches a certain value.
Both the RMON protocol and the Simple Network Management Protocol (SNMP) are used for
remote network management:
z RMON is implemented on the basis of the SNMP, which is thus enhanced. RMON sends
traps to the management device to notify the abnormality of the alarm variables by using
the SNMP trap packet sending mechanism. Although trap is also defined in SNMP, it is
usually used to notify the management device whether some functions on managed
devices operate normally and the change of physical status of interfaces. Traps in RMON
and those in SNMP have different monitored targets, triggering conditions, and report
contents.
z RMON provides an efficient means of monitoring subnets and allows SNMP to monitor
remote network devices in a more proactive and effective way. The RMON protocol defines