26. Remote Monitoring; Introduction; Feature Overview - Nokia ESB26 User Manual

26. Remote Monitoring

Introduction

Remote Monitoring (RMON) is a standard monitoring specification that enables various
network monitors and console systems to exchange network-monitoring data. RMON
provides network administrators with more freedom in selecting network-monitoring probes
and consoles with features that meet their particular networking needs. This section provides a
brief overview of the RMON specification, focusing on RMON groups.
The RMON specification defines a set of statistics and functions that can be exchanged
between RMON-compliant console managers and network probes. As such, RMON provides
network administrators with comprehensive network-fault diagnosis, planning, and
performance-tuning information.

Feature Overview

Packets Definitions
Good Packets
Good packets are error-free packets that have a valid frame length. For example, on Ethernet,
good packets are error-free packets that are between 64 and 1518 octets long. They follow the
form defined in IEEE 802.3.
Bad Packets
Bad packets are packets that have proper framing and are therefore recognized as packets, but
contain errors within the packet or have an invalid length. For example, on Ethernet, bad
packets have a valid preamble and Start of Frame Delimiter
Redundancy Check (CRC) or are either shorter than 64 octets or longer than 1518 octets.
RMON Groups
The ESB26 switch supports the following four RMON groups:
•
Statistics
• History
•
Alarms
•
Events
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