Chapter 2 Rmon Configuration; Rmon Overview; Working Mechanism Of Rmon - H3C S7500 Series Operation Manual

Operation Manual – SNMP and RMON
H3C S7500 Series Ethernet Switches

Chapter 2 RMON Configuration

When configuring RMON, go to these sections for information you are interested in:

RMON Overview

RMON Configuration
Displaying RMON
RMON Configuration Example
2.1 RMON Overview
Remote monitoring (RMON) is a kind of Management Information Base (MIB) defined
by Internet Engineering Task Force (IETF) and is a most important enhancement made
to MIB II standards. RMON is mainly used to monitor the data traffic across a network
segment or even the entire network, and is currently a commonly used network
management standard.
An RMON system comprises of two parts: the network management station (NMS) and
the agents running on network devices. RMON agents operate on network monitors or
network probes to collect and keep track of the statistics on the traffic across the
network segments to which their ports connect such as the total number of the packets
on a network segment in a specific period of time and the total number of packets that
are sent to a specific host successfully.
RMON is fully based on Simple Network Management Protocol (SNMP) architecture. It
is compatible with the current SNMP, so that you can implement RMON without
modifying SNMP. RMON enables SNMP to monitor remote network devices more
effectively and actively, thus providing a satisfactory means of monitoring the operation
of the subnet. With RMON, the communication traffic between NMS and agents is
reduced, thus facilitating the management of large-scale internetworks.

2.1.1 Working Mechanism of RMON

RMON allows multiple monitors. It collects data in one of the following two ways:
Using the dedicated RMON probe. When an RMON system operates in this way,
the NMS directly obtains management information from the RMON probes and
controls the network resources. In this case, all information in the RMON MIB can
be obtained.
Embedding RMON agents into network devices (such as routers, switches and
hubs) directly to make the latter capable of RMON probe functions. When an
RMON system operates in this way, the NMS collects network management
information by exchanging information with the SNMP agents using the basic
SNMP commands. However, this way depends on device resources heavily and
2-1
Chapter 2 RMON Configuration