3Com CoreBuilder 2500, User Manual

Page: 215 / 244

15
R
EMOTE
M
ONITORING
(RMON)
T
ECHNOLOGY
This chapter provides an overview of RMON and describes the specific
CoreBuilder
™
2500 RMON implementation.
This chapter includes these sections about RMON:
■
Overview
■
RMON Benefits
■
RMON in the CoreBuilder 2500
■
RMON Groups
■
3Com Transcend RMON Agents
■
RMON Management Information Base (MIB)
Overview
The Remote Monitoring (RMON) Management Information Base (MIB)
provides a way to monitor and analyze a LAN from a remote location. The
Internet Engineering Task Force (IETF) defines RMON in the document
RFC 1757. A typical RMON implementation has two components:
■
Probe — Connects to a LAN segment, examines all the LAN traffic on
that segment, and keeps a summary of statistics (including historical
data) in its local memory.
■
Management Console — Communicates with the probe and
collects summarized data from it. The console does not need to reside
on the same network as the probe. It can manage the probe through
SNMP or through out-of-band connections.
The RMON specification consists almost entirely of the definition of the
MIB. The RMON MIB contains standard MIB variables that are defined to
collect comprehensive network statistics that alert a network
administrator to significant network events. If the embedded RMON
agent operates full time, it collects data on the correct port when the
relevant network event occurs.