3Com Switch 8800 Advanced Software V5 Configuration Guide

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RMON CONFIGURATION
When configuring RMON, go to these sections for information you are interested
in:
■ “RMON Overview” on page 1057
■ “Configuring RMON” on page 1059
■ “Displaying and Maintaining RMON” on page 1060
■ “RMON Configuration Examples” on page 1061
RMON Overview This section covers these topics:
■ “Introduction” on page 1057
■ “RMON Groups” on page 1058
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.
■ Each RMON NMS administers the agents within its administrative domain.
■ 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.
RMON allows multiple monitors. A monitor provides two ways of data gathering:
■ 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.
■ 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