H3C S5120-EI Series, Operation Manual

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RMON Configuration
When configuring RMON, go to these sections for information you are interested in:
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RMON Overview
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Configuring RMON
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Displaying and Maintaining RMON
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RMON Configuration Example
RMON Overview
This section covers these topics:
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Introduction
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RMON Groups
Introduction
Remote Monitoring (RMON) is implemented based on the Simple Network Management Protocol
(SNMP) and is fully compatible with the existing SNMP framework without the need of any modification
on SNMP.
RMON provides an efficient means of monitoring subnets and allows SNMP to monitor remote network
devices in a more proactive and effective way. It reduces traffic between network management station
(NMS) and agent, facilitating large network management.
RMON comprises two parts: NMSs and agents running on network devices.
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Each RMON NMS administers the agents within its administrative domain.
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An RMON agent resides on a network monitor or a network probe. It monitors and collects statistics
on traffic over the network segments connected to its interfaces, such as the total number of
packets passed through a network segment over a specified period, or the total number of good
packets sent to a host.
Working Mechanism
RMON allows multiple monitors. A monitor provides two ways of data gathering:
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Using RMON probes. NMSs can obtain management information from RMON probes directly and
control network resources. In this approach, RMON NMSs can obtain all RMON MIB information.
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Embedding RMON agents in network devices such as routers, switches, and hubs to provide the
RMON probe function. RMON NMSs exchange data with RMON agents using basic SNMP
commands to gather network management information, which, due to system resources limitation,
may not cover all MIB information but four groups of information, alarm, event, history, and
statistics, in most cases.
The device adopts the second way. By using RMON agents on network monitors, an NMS can obtain
information about traffic size, error statistics, and performance statistics for network management.