Operation Manual - System Management
Quidway S6500 Series Ethernet Switches Chapter 6 RMON Configuration
Huawei Technologies Proprietary
6-1
Chapter 6 RMON Configuration
6.1 RMON Overview
Remote Network Monitoring (RMON) is a type of IETF-defined MIB. It is the most
important enhancement to the MIB II standard. It is mainly used for monitoring the data
traffic on a segment and even on a whole network. It is one of the widely used Network
Management standards by far.
RMON is implemented fully based on the SNMP architecture (which is one of its
outstanding advantages) and compatible with the existing SNMP framework, and
therefore it is unnecessary to adjust the protocol. RMON includes NMS (Network
Management Station) and the Agent running on the network devices. On the network
monitor or detector, RMON Agent tracks and accounts different traffic information on
the segment connected to its port, such as the total number of packets on a segment in
a certain period of time or that of the correct packets sent to a host. ROMN helps the
SNMP monitor the remote network device more actively and effectively, which provides
a highly efficient means for the monitoring of the subnet operations. RMON can reduce
the communication traffic between the NMS and the agent, thus facilitates an effective
management over the large interconnected networks.
RMON allows multiple monitors. It can collect data in two ways.
z One is to collect data with a special RMON probe. NMS directly obtains the
management information from the RMON probe and controls the network
resource. In this way, it can obtain all the information of RMON MIB
z Another way is to implant the RMON Agent directly into the network devices (e.g.
router, switch, HUB, etc.), so that the devices become network facilities with
RMON probe function. RMON NMS uses the basic SNMP commands to
exchange data information with SNMP Agent and collect NM information.
However, limited by the device resources, normally, not all the data of RMON MIB
can be obtained with this method. In most cases, only four groups of information
can be collected. The four groups include trap information, event information,
history information and statistics information.
The Ethernet Switch implements RMON in the second method by far. With the
RMON-supported SNMP Agent running on the network monitor, NMS can obtain such
information as the overall traffic of the segment connected to the managed network
device port, the error statistics and performance statistics, thereby implementing the
management (generally remote management) over the network.
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