Remote Monitoring (Rmon) - Alcatel-Lucent OmniSwitch 6850-48 Network Configuration Manual

Remote Monitoring (RMON)

Remote Monitoring (RMON)
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.
NMS Workstation
B. ...appear to come from the mirrored port
when the NMS Workstation receives them.
C. Management frames from the NMS Workstation are sent to the mirrored port....
NMS Workstation
page 45-34
Mirrored Port
OmniSwitch
Mirrored
Port Mirroring Using External RMON Probe
OmniSwitch AOS Release 6 Network Configuration Guide
A. RMON probe frames sent from the mirroring port...
Mirroring Port
RMON Probe
Mirroring Port
RMON Probe
OmniSwitch
D. ...and port mirroring sends copies of the
Management frames to the mirroring port.
Diagnosing Switch Problems
September 2009