Alcatel-Lucent 6850-48 网络指南

Remote Monitoring (RMON)

Diagnosing Switch Problems

page 45-34

OmniSwitch AOS Release 6 Network Configuration Guide

Remote Network Monitoring (RMON) is an SNMP protocol used to manage networks remotely. RMON 
probes can be used to collect, interpret, and forward statistical data about network traffic from designated 
active ports in a LAN segment to an NMS (Network Management System) application for monitoring and 
analysis without negatively impacting network performance. RMON software is fully integrated in the 
Chassis Management software and works with the Ethernet software to acquire statistical information. 
However, it does not monitor the CMM module’s onboard Ethernet Management port on OmniSwitch 
chassis-based switches (which is reserved for management purposes).

The following diagram illustrates how an External RMON probe can be used with port mirroring to copy 
RMON probe frames and Management frames to and from the mirroring and mirrored ports. Frames 
received from an RMON probe attached to the mirroring port can be seen as being received by the 
mirrored port. These frames from the mirroring port are marked as if they are received on the mirrored 
port before being sent over the switch backplane to an NMS station. Therefore, management frames that 
are destined for the RMON probe are first forwarded out of the mirrored port. After being received on the 
mirrored port, copies of the frames are mirrored out of the mirroring port—the probe attached to the 
mirroring port receives the management frames.

 RMON probe frames sent from the mirroring port...

 ...appear to come from the mirrored port 

when the NMS Workstation receives them.

 ...and port mirroring sends copies of the 

Management frames to the mirroring port.

 Management frames from the NMS Workstation are sent to the mirrored port....