LevelOne IES-0883, User Manual

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IES-0883 User Manual Page 25
SNMP & RMON Management
This chapter describes the switch’s Simple Network Management Protocol (SNMP) and
Remote Monitoring (RMON) capabilities.
Overview
RMON is an abbreviation for the Remote Monitoring MIB (Management Information Base).
RMON is a system defined by the Internet Engineering Task Force (IETF) document RFC
2819, which defines how networks can be monitored remotely.
RMONs typically consist of two components: an RMON probe and a management
workstation:
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The RMON probe is an intelligent device or software agent that continually
collects statistics about a LAN segment or VLAN. The RMON probe transfers
the collected data to a m anagement workstation on request or when a
pre-defined threshold is reached.
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The management workstation collects the statistics that the RMON probe
gathers. The workstation can reside on the same network as the probe, or it
can have an in-band or out-of-band connection to the probe.
The switch provides RMON capabilities that allow network administrators to set
parameters and view statistical counters defined in MIB-II, Bridge MIB, and RMON MIB.
RMON activities are performed at a Network Management Station running an SNMP
network management application with graphical user interface.
SNMP Agent and MIB-2 (RFC 1213)
The SNMP Agent running on the switch manager CPU is responsible for:
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Retrieving MIB counters from various layers of software modules according
to the SNMP GET/GET NEXT frame messages.
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Setting MIB variables according to the SNMP SET frame message.
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Generating an SNMP TRAP frame message to the Network Management
Station if the threshold of a certain MIB counter is reached or if other trap
conditions (such as the following) are met: