Configuring Rmon; Information About Rmon; Rmon Alarms - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Configuring RMON

This chapter contains the following sections:
•
Configuring RMON

Information About RMON

RMON is an Internet Engineering Task Force (IETF) standard monitoring specification that allows various
network agents and console systems to exchange network monitoring data. The Cisco NX-OS supports RMON
alarms, events and logs to monitor Cisco Nexus 5000 Series switches
An RMON alarm monitors a specific management information base (MIB) object for a specified interval,
triggers an alarm at a specified threshold value (threshold), and resets the alarm at another threshold value.
You can use alarms with RMON events to generate a log entry or an SNMP notification when the RMON
alarm triggers.
RMON is disabled by default and no events or alarms are configured in Cisco Nexus 5000 Series. You can
configure your RMON alarms and events by using the CLI or an SNMP-compatible network management
station

RMON Alarms

You can set an alarm on any MIB object that resolves into an SNMP INTEGER type. The specified object
must be an existing SNMP MIB object in standard dot notation (for example, 1.3.6.1.2.1.2.2.1.17 represents
ifOutOctets.17).
When you create an alarm, you specify the following parameters:
• MIB object to monitor
• Sampling interval—The interval that the Cisco Nexus 5000 Series switch uses to collect a sample value
• The sample type—Absolute samples take the current snapshot of the MIB object value. Delta samples
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Configuring RMON, page 387
of the MIB object.
take two consecutive samples and calculate the difference between them.
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