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Riverstone Networks RS Switch Router User Guide Release 8.0 28-5
RMON Configuration Using RMON
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 RS, with the owner set to “monitor”. If you want, you can
change the owner by using the appropriate
rmon
command. See the section Section 28.3, "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 Section 28.3, "Configuring RMON Groups".
28.2 USING RMON
RMON on the RS 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 RS’s layer 2 ASIC is collected by RMON 1 groups.
RMON 2 in the RS provides layer 3 traffic information for IP and IPX protocols. Traffic flowing through the RS’s
layer 3 ASIC is collected by RMON 2 groups. The RS’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.
For example, use the
rmon show protocol-distribution
command to see the kinds of traffic received on a given
port:
In the example output above, only HTTP and ICMP traffic is being received on this port.
rs#
rmon show protocol-distribution et.5.5
RMON II Protocol Distribution Table
Index: 506, Port: et.1.7, Owner: monitor
Pkts Octets Protocol
---- ------ --------
19 1586 ether2
19 1586 ether2.ip-v4
19 1586 *ether2.ip-v4
2 192 *ether2.ip-v4.icmp
17 1394 *ether2.ip-v4.tcp
17 1394 *ether2.ip-v4.tcp.www-http