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DES-7200 Configuration Guide Chapter 2 RMON
Configuration
2 RMON Configuration
2.1 Overview
RMON (Remote Monitoring) is a standard monitoring specification of IETF
(Internet Engineering Task Force). It can be used to exchange the network
monitoring data among various network monitors and console systems. In the
RMON, detectors can be placed on the network nodes, and th
e NMS
three stages in the development of RMON. The first stage is the
ry), but some groups should be supported by the
ro
The switch implements the contents of Group 1, 2 , 3 and 9: the statistics,
2
determines which information is reported by these detectors, for example, the
monitored statistics and the time buckets for collecting history. The network
device such as the switch or router acts as a node on the network. The
information of current node can be monitored by means of the RMON.
There are
remote monitoring of Ethernet. The second stage introduces the token ring
which is referred to as the token ring remote monitoring module. The third stage
is known as RMON2, which develops the RMON to a high level of protocol
monitor.
The first stage of RMON (known as RMON1) contains nine groups. All of them
are optional (not mandato
other g ups.
history, alarm and event.
.1.1 Statistics
Statistics is the first group in RMON. It measures the basic statistics information
of each monitored subnet. At present, only the Ethernet interfaces of network
nitored and measured. This group contains a statistics of
Ethernet, including the discarded packets, broadcast packets, CRC errors, size
2 y
devices can be mo
block, conflicts and etc.
.1.2 Histor
History is the second group in RMON. It collects the network statistics
information regularly and keeps them for pro
cessing later. This group contains
two subgroups:
2-1