Rmon Configuration; 2.1 Introduction To Rmon; 2.1.1 Working Mechanism Of Rmon - H3C S5100-SI Operation Manual

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RMON Configuration

When configuring RMON, go to these sections for information you are interested in:
Introduction to RMON
RMON Configuration
Displaying RMON
RMON Configuration Example

2.1 Introduction to RMON

Remote Monitoring (RMON) is a kind of MIB defined by Internet Engineering Task Force (IETF). It
is an 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 of 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 successfully sent to a specific host.
RMON is fully based on SNMP architecture. It is compatible with the current SNMP
implementations.
RMON enables SNMP to monitor remote network devices more effectively and actively, thus
providing a satisfactory means of monitoring remote subnets.
With RMON implemented, the communication traffic between NMS and SNMP agents can
be reduced, thus facilitating the management of large-scale internetworks.

2.1.1 Working Mechanism of RMON

RMON allows multiple monitors. It can collect data in the following two ways:
Using the dedicated RMON probes. 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 an NMS operating in this way can only obtain the information about
these four groups (instead of all the information in the RMON MIB): alarm group, event group,
history group, and statistics group.
An H3C S5100-SI/EI Ethernet switch implements RMON in the second way. With an RMON agent
embedded in, an S5100-SI/EI Ethernet switch can serve as a network device with the RMON
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