3com 9000 SX Manual De Usuario

C

HAPTER

 9: S

TATUS

 M

ONITORING

 

AND

 S

TATISTICS

A typical RMON setup consists of the following two components:

■

The RMON probe — 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.

■

The management workstation — 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 Switch 9000 supports the following four RMON groups:

■

Statistics

■

History

■

Alarms

■

Events

This section describes how to use each of these groups to monitor your 
network.

The 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 can be 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.

SW9000.BK  Page 12  Wednesday, April 1, 1998  11:00 AM