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Figure 116. An Example of RMON Implementation
10.1.2 RMON Manager
The network management station, also known as the RMON manager, works in
conjunction with the RMON agents to provide a central point for managing and
consolidating information gathered by the RMON agents. To minimize network
overhead, the RMON manager does not continuously poll the agents although it
has the ability to do so. The information collected by individual agents is
transferred to the RMON manager at specified time intervals. The transfer can
be arranged to take place during off-peak hours. In addition, the RMON
manager can request the information to be transferred on demand.
Each agent can be configured by the RMON manager to monitor and collect LAN
statistics at specified time intervals for the desired duration, and to forward the
information gathered at a specified frequency. Alarms can be configured on the
agents to generate events that inform the manager of a certain threshold
incident. This eliminates the need for the manager to constantly poll the RMON
agents, thus reducing network traffic overheads.
From the information provided by the RMON agents, the RMON manager can get
a ″bird′s eye″ view of the current state of the entire network at a glance. The
information can be used to pro-actively manage the network by monitoring
Chapter 10. 8260 RMON Support 193