Corecess R1-SW24L2B, User Manual

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R1-SW24L2B User’s Manual
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Configuring RMON
RMON (Remote MONitoring) Overview
The RMON is a standard MIB that defines current and historical MAC-layer statistics and
control objects, allowing you to capture real-time information across the entire network. The
RMON standard is an SNMP MIB definition described in RFC 1757 (formerly 1271) for Ethernet.
The RMON MIB provides a standard method to monitor the basic operations of the Ethernet,
providing inoperability between SNMP management stations and monitoring agents. The
RMON also provides a powerful alarm and event mechanism for setting thresholds and for
notifying you of changes in network behavior.
You can use the RMON to analyze and monitor network traffic data within remote LAN
segments from a central location. This allows you to detect, isolate, diagnose, and report
potential and actual network problems before they escalate to crisis situations. For example, the
Corecess R1-SW24L2B can identify the hosts on a network that generate the most traffic or
errors.
The RMON allows you to set up automatic histories, which the RMON agent collects over a
period of time, providing trending data on such basic statistics as utilization, collisions, and so
forth. The RMON monitors nine MIB groups including network statistics. The following table
lists the RMON MIB groups:
Table 8-13 RMON groups
Group Description
1. Statistics Collects the network statistics.
2. History Records the network activity in sequence of time.
3. Alarm
Defines level of the alarms to be informed to the manager.
4. Host Monitors the hosts in the network.
5. Host Top N Filters and manages the information of N hosts.
6. Matrix Monitors the traffics between network nodes.
7. Filter Monitors the specified packets on the network segment.
8. Packet Capture
Creates capture buffers and controls how the buffers are filled and how much of
each packet is stored.
9. Event Determines the action to take when an event is triggered by an alarm.