3Com 4800G Series, Руководство по настройке

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RMON C
ONFIGURATION
When configuring RMON, go to these sections for information you are interested
in:
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“RMON Overview” on page 941
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“Configuring RMON” on page 943
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“Displaying and Maintaining RMON” on page 944
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“RMON Configuration Example” on page 945
RMON Overview
This section covers these topics:
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“Introduction” on page 941
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“RMON Groups” on page 942
Introduction Remote Monitoring (RMON) is a type of IETF-defined MIB. It is the most important
enhancement to the MIB II standard. It allows you to monitor traffic on network
segments and even the entire network.
RMON is implemented based on the Simple Network Management Protocol
(SNMP) and is fully compatible with the existing SNMP framework.
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 probe for an interface. It
monitors and gathers information about traffic over the network segment
connected to the interface to provide statistics about packets over a specified
period and good packets sent to a host for example.
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 with basic SNMP commands to gather network management
information, which, due to system resources limitation, may not cover all MIB