Figure 12-5 Rmon Networking - Raisecom ISCOM2600G-HI (A) Series Configuration Manual

Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
statistics, and analysis used to achieve the monitoring to one segment and the whole network,
while SNMP only can monitor the partial information about a single device and it is difficult
for it to monitor one segment.
The RMON Agent is commonly referred to as the probe program. The RMON Probe can take
the communication subnet statistics and performance analysis. Whenever it finds network
failure, RMON Probe can report the NView NNM system, and describes the capture
information under unusual circumstances so that the NView NNM system does not need to
poll the device constantly. Compared with SNMP, RMON can monitor remote devices more
actively and more effectively, network administrators can track the network, segment or
device malfunction more quickly. This method reduces the data flows between the NView
NNM system and Agent, makes it possible to manage large networks simply and powerfully,
and makes up the limitations of SNMP in growing distributed Internet.
RMON Probe collects data in the following modes:
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The Raisecom ISCOM2600G-HI series switch is embedded with RMON. As shown in Figure
12-5, the ISCOM2600G-HI series switch implements RMON Agent function. Through this
function, the management station can obtain the overall flow, error statistics and performance
statistics about this segment connected to the managed network device interface so as to
achieve the monitoring to one segment.

Figure 12-5 RMON networking

RMON MIB can be divided into nine groups according to function. Currently, there are four
function groups achieved: statistics group, history group, alarm group, and event group.
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Distributed RMON. Network management center obtains network management
information and controls network resources directly from RMON Probe through
dedicated RMON Probe collection data.
Embedded RMON. Embed RMON Agent directly to network devices (such as switches)
to make them with RMON Probe function. Network management center will collect
network management information through the basic operation of SNMP and the
exchange data information about RMON Agent.
Statistic group: collect statistics on each interface, including receiving packets accounts
and size distribution statistics.
History group: similar with statistic group, it only collects statistics in an assigned
detection period.
Alarm group: monitor an assigned MIB object and configure upper threshold and lower
threshold in assigned interval, trigger an event if the monitor object receives threshold
value.
Event group: cooperating with alarm group. When an alarm triggers an event, it records
the event, such as sending Trap, and writes the event into log.
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