Extreme 3804 Guia Do Utilizador

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RMON

A typical RMON setup consists of the following two components:

 — An intelligent, remotely controlled device or software agent that 

continually collects statistics about a LAN segment or VLAN. The probe transfers 
the information to a management workstation on request, or when a predefined 
threshold is crossed.

 — Communicates with the RMON probe and collects the 

statistics from it. The workstation does not have to be on the same network as the 
probe, and can manage the probe by in-band or out-of-band connections.

The IETF defines nine groups of Ethernet RMON statistics. The Summit supports the 
following four of these groups:

Statistics

History

Alarms

Events

This section describes these groups, and discusses how they can be used.

The RMON Ethernet Statistics group provides traffic and error statistics showing 
packets, bytes, broadcasts, multicasts, and errors on a LAN segment or VLAN.

Information from the Statistics group is used to detect changes in traffic and error 
patterns in critical areas of the network.

The History group provides historical views of network performance by taking periodic 
samples of the counters supplied by the Statistics group. The group features 
user-defined sample intervals and bucket counters for complete customization of trend 
analysis.

The group is useful for analysis of traffic patterns and trends on a LAN segment or 
VLAN, and to establish baseline information indicating normal operating parameters.

Summit.bk : 12STATUS.FM  Page 15  Thursday, June 18, 1998  9:27 AM