Chapter 21: RMON Configuration Guide
284
DIGITAL GIGAswitch/Router User Reference Manual
If you choose to create default control tables, entries are created in the control tables for
each port on the GSR for the following groups:
Lite groups:
Etherstats
History
Standard groups:
Host
Matrix
Professional groups:
Protocol Distribution
Address Map
Application Layer/Network Layer Host
Application Layer/Network Layer Matrix
A row in the control table is created for each port on the GSR, with the owner set to
“monitor”. If you want, you can change the owner by using the appropriate
rmon
command. See the section “Configuring RMON Groups” in this chapter for more the
command to configure a specific group.
Note:
Control tables other than the default control tables must be configured with CLI
commands, as described in “Configuring RMON Groups”.
Using RMON
RMON on the GSR allows you to analyze network traffic patterns, set up alarms to detect
potential problems before they turn into real congestive situations, identify heavy
network users to assess their possible candidacy for moves to dedicated or higher speed
ports, and analyze traffic patterns to facilitate more long-term network planning.
RMON 1 provides layer 2 information. Traffic flowing through the GSR’s layer 2 ASIC is
collected by RMON 1 groups. RMON 2 in the GSR provides layer 3 traffic information for
IP and IPX protocols. Traffic flowing through the GSR’s layer 3 ASIC is collected by
RMON 2 groups. The GSR’s RMON 2 protocol directory contains over 500 protocols that
can be decoded for UDP and TCP ports. You can use RMON to see the kinds of protocol
traffic being received on a given port.
