Configuration Of Rmon; Overview; Statistics; History - D-Link xStack DGS-3610 Series Configuration Manual

DGS-3610 Series Configuration Guide
26

26.1 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 the NMS 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 three stages in the development of RMON. The first stage is the remote
monitoring of Ethernet. In 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 mandatory), but some groups should be supported by the other groups.
The switch implements the contents of Group 1, 2 , 3 and 9: the statistics, history, alarm and
event.
26.1.1

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 devices can be
monitored and measured.This group contains a statistics of Ethernet, including the
discarded packets, broadcast packets, CRC errors, size block, conflicts and etc.
26.1.2

History

History is the second group in RMON. It collects the network statistics information regularly
and keeps them for processing later on. This group contains two subgroups:
1. The subgroup HistoryControl is used to set such control information as sampling time
interval and sampling data source.
2. The subgroup EthernetHistory provides history data about the network section, error
packets, broadcast packets, utilization, number of collision and other statistics for the
administrator.

Configuration of RMON

Chapter 26 Configuration of RMON
26-1