Introduction; Rmon Configuration; Rmon Overview; Working Mechanism - H3C S5810 Series Operation Manual

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RMON Configuration

When configuring RMON, go to these sections for information you are interested in:

RMON Overview

Configuring the RMON Statistics Function
Configuring the RMON Alarm Function
Displaying and Maintaining RMON
RMON Configuration Example
RMON Overview
This section covers these topics:

Introduction

RMON Groups
Introduction
The 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 the
managed device to monitor the value of a specified MIB variable, log the event and send traps 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:
The 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 usually used to notify the
management device whether some functions on the managed device operate normally and the
change of physical status of interfaces. Traps in RMON and in SNMP have different monitored
targets, triggering conditions, and report contents.
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 that when the
alarm threshold is reached, the managed device send traps automatically, so the management
device has no need to get the values of MIB variables and compare them for multiple times, and
thus greatly reducing the communication traffic between the management device and the managed
devices. In this way, you can manage a large scale of network easily and effectively.

Working Mechanism

RMON allows multiple monitors. A monitor provides two ways of data gathering:
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