Specifications

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Catalyst 2970 Switch Software Configuration Guide
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Chapter 23 Configuring RMON
Configuring RMON
Figure 23-1 Remote Monitoring Example
The switch supports these RMON groups (defined in RFC 1757):
• Statistics (RMON group 1)—Collects Ethernet statistics (including Fast Ethernet and Gigabit
Ethernet statistics, depending on the switch type and supported interfaces) on an interface.
• History (RMON group 2)—Collects a history group of statistics on Ethernet interfaces (including
Fast Ethernet and Gigabit Ethernet statistics, depending on the switch type and supported interfaces)
for a specified polling interval.
• Alarm (RMON group 3)—Monitors a specific management information base (MIB) object for a
specified interval, triggers an alarm at a specified value (rising threshold), and resets the alarm at
another value (falling threshold). Alarms can be used with events; the alarm triggers an event, which
can generate a log entry or an SNMP trap.
• Event (RMON group 9)—Determines the action to take when an event is triggered by an alarm. The
action can be to generate a log entry or an SNMP trap.
Because switches supported by this software release use hardware counters for RMON data processing,
the monitoring is more efficient, and little processing power is required.
Configuring RMON
These sections describe how to configure RMON on your switch:
• Default RMON Configuration, page 23-3
• Configuring RMON Alarms and Events, page 23-3 (required)
• Collecting Group History Statistics on an Interface, page 23-5 (optional)
• Collecting Group Ethernet Statistics on an Interface, page 23-6 (optional)
Catalyst 2970 switch
RMON alarms and events
configured. SNMP configured.
Catalyst 2950
switch
RMON history
and statistic
collection enabled.
Workstations
90562
Catalyst 2950
switch
Workstations
Network management station with
generic RMON console application