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Cisco SG220-26P Administration Guide

Cisco SG220-26P
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Status and Statistics
Managing RMON
Cisco 220 Series Smart Switches Administration Guide Release 1.1.0.x 27
2
Managing RMON
Remote Networking Monitoring (RMON) is an SNMP specification that enables an
SNMP agent in the switch to proactively monitor traffic statistics over a given
period and send traps to an SNMP manager. The local SNMP agent compares
actual, real-time counters against predefined thresholds and generates alarms,
without the need for polling by a central SNMP management platform. This is an
effective mechanism for proactive management, provided that you have right
thresholds set relative to your network’s base line.
RMON decreases the traffic between the manager and the switch because the
SNMP manager does not have to frequently poll the switch for information, and
enables the manager to get timely status reports because the switch reports
events as they occur.
With this feature, you can perform the following actions:
View the current statistics (since the counter values were cleared). You can
also collect the values of these counters over a period of time, and then
view the table of collected data, where each collected set is a single line of
the History Table.
Define interesting changes in counter values, such as “reached a certain
number of late collisions” (defines the alarm), and then specify what action
to perform when this event occurs (log, trap, or log and trap).
NOTE For RMON configuration to be effective, make sure that the SNMP service is
enabled on the switch.
This section includes the following topics:
Viewing RMON Statistics
Configuring and Viewing RMON Histories
Configuring and Viewing RMON Events
Configuring RMON Alarms

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Cisco SG220-26P Specifications

General IconGeneral
ModelSG220-26P
Ports26
PoE Ports24
Switching Capacity52 Gbps
Forwarding Rate38.69 Mpps
LayerLayer 2
Power SupplyInternal
VLANs Supported256
ManagementWeb-based GUI, SNMP
Operating Temperature0°C to 40°C
Storage Temperature-4°F to 158°F (-20°C to 70°C)
Operating Humidity10% to 90% non-condensing
Storage Humidity5% to 95% non-condensing
Dimensions440 x 44 x 257 mm
Weight3.3 kg

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