About Rmon; Configuring Rmon - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

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Configuring 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. You can use the
RMON alarms and events to monitor Cisco MDS 9000 Family switches running the Cisco SAN-OS
Release 2.0(1b) or later or Cisco NX-OS 4.1(3) software.
This chapter includes the following sections:
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About RMON

All switches in the Cisco MDS 9000 Family support the following RMON functions (defined in RFC
2819):
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For agent and management information, see the Cisco MDS 9000 Family MIB Quick Reference.
For information on an SNMP-compatible network management station, see the Cisco MDS 9000 Family
Fabric Manager Configuration Guide.
For SNMP security-related CLI configurations, see the
Configuring RMON
RMON is disabled by default and no events or alarms are configured in the switch. You can configure
your RMON alarms and events by using the CLI or an SNMP-compatible network management station.
OL-18084-01, Cisco MDS NX-OS Release 4.x
About RMON, page 50-1
Configuring RMON, page 50-1
RMON Verification, page 50-4
Default Settings, page 50-4
Alarm—Each alarm monitors a specific management information base (MIB) object for a specified
interval. When the MIB object value exceedes a specified value (rising threshold), the alarm
condition is set and only one event is triggered regardless of how long the condition exists. When
the MIB object value falls below a certain value (falling threshold), the alarm condition is cleared.
This allows the alarm to trigger again when the rising threshold is crossed again.
Event—Determines the action to take when an event is triggered by an alarm. The action can be to
generate a log entry, an SNMP trap, or both.
C H A P T E R
"About SNMP Security" section on page 33-1
Cisco MDS 9000 Family CLI Configuration Guide
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50-1