Avaya Configuring SNMP, RMON, BOOTP, DHCP, and RARP Services Manuel d'utilisateur Page 42

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Configuring SNMP, RMON, BOOTP, DHCP, and RARP Services
2-10 114070 Rev. B
RMON Overview
RMON is a standard MIB that defines current and historical MAC-layer statistics
and control objects, allowing you to capture realtime information across the entire
network. The RMON standard is an SNMP MIB definition described in RFC 1757
(formerly 1271) for Ethernet.
The RMON MIB provides a standard method to monitor the basic operations of
the Ethernet, providing inoperability between SNMP management stations and
monitoring agents. RMON also provides a powerful alarm and event mechanism
for setting thresholds and for notifying you of changes in network behavior.
You can use RMON to analyze and monitor network traffic data within remote
LAN segments from a central location. This allows you to detect, isolate,
diagnose, and report potential and actual network problems before they escalate to
crisis situations. For example, the Ethernet DCM can identify the hosts on a
network that generate the most traffic or errors.
RMON allows you to set up automatic histories, which the RMON agent collects
over a period of time, providing trending data on such basic statistics as
utilization, collisions, and so forth. Using a network management application such
as Optivity LAN or Optivity Analysis, you can retrieve histories to understand
network usage patterns. Because RMON automates this data collection and
provides better data to the planning process, the process is easier and the outcome
more accurate.
How RMON Works
A typical RMON configuration consists of a central network management station
and a remote monitoring device, called an RMON agent. The network
management station can be a Windows-based or UNIX-based workstation or PC
running a network management application, such as Optivity Analysis. From the
management station, you can issue SNMP commands requesting information
from the RMON agent. The RMON agent sends the requested information to the
management station, which then processes and displays this information on its
console.
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