Specifications

9031280 E4 Introduction

1-5

RMON Groups

• The RMON MIB, which is based on RFC 1271 (Ethernet) and RFC 1513

(Token Ring), is divided into the following groups:

• Statistics

•History

•Alarm

•Host

• HostTopN

•Matrix

• Filter

•Packet Capture

•Event

• Token Ring

Each group defines a set of objects to be monitored. In addition, each group

stores data and statistics collected by the agent on the device, which may have

multiple network interfaces.

Supported RMON Groups

The RMON Management Module currently supports the following RMON

groups:

Group Description

Statistics Maintains low-level utilization and error statistics for each

subnetwork monitored by the agent. Statistics include packet

counts, error breakdown, and frame size breakdown.

History Records periodic statistical samples over specified intervals.

Alarm Monitors user-selected statistics and compares them to user-

defined rising and falling thresholds, generating alarms when the

thresholds are reached or exceeded.

Host Maintains statistics associated with each host, or node, on the

subnetwork. The agent discovers hosts automatically as the source

and destination MAC addresses of good packets are recorded.

HostTopN Contains the top-performing host statistics from a list based on

parameters in the host table. You can use the statistics to identify

trends, such as the top three error-producing nodes or the top ten

traffic-producing nodes.

Matrix Maintains statistics associated with each host pair, or source and

destination addresses, on the subnetwork.