3Com Traffix Transcend Traffix Manager, Руководство пользователя

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RMON Overview 37
RMON Overview
Traffix Manager supports all agents that are compliant with the Internet
Engineering Task Force (IETF) Remote MONitoring Management
Information Base Version 1 (RMON-1 MIB), defined in RFC 1757, and
Version 2 (RMON-2 MIB), defined in RFCs 2021 and 2074.
The RMON standards bring the following advantages to network
monitoring:
■
They provide an effective and efficient way to monitor the behavior of
the entire LAN.
■
They distribute the load of network monitoring between both remote
devices and management stations.
■
They are widely-used standards.
An RMON agent can be deployed as a stand-alone probe or embedded
within another device. Management applications communicate with
RMON agents using the
SNMP protocol . In this way, RMON agents collect
information about network behavior, and can then transfer it on
command to an analysis site.
RMON agents have the following benefits:
■
They improve the efficiency of staff by allowing them to remain in a
centralized site while collecting information from widely dispersed
LAN segments.
■
They can continuously monitor and collect information and deliver it
before problems occur, allowing you to take a proactive approach to
managing your network.
■
Each remote agent can handle requests from multiple management
stations.
Remote Monitoring A client sets RMON variables on the device to specify measurement
intervals, monitored thresholds and other operational parameters. The
remote device collects and stores information and delivers it to a client on
request.
RMON-2 Standard RMON-2 is an extension of the RMON-1 standard. The most visible and
most beneficial capability of RMON-2 is monitoring above the MAC layer.
RMON-2 collects statistics at the network and application layers of the
protocol stack to provide a view of the whole network rather than a