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Viewing Statistics
RMON
Cisco Small Business SG200 Series 8-port Smart Switch 27
2
RMON
RMON (Remote Networking Monitoring) is an SNMP specification that enables an
SNMP agent in the switch to 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 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. Use the RMON Statistics page to display details about
switch use, such as packet processing statistics and errors that have occurred on
the switch.
The RMON Statistics page displays detailed information regarding packet sizes
and information regarding physical layer errors. The information shown is
according to the RMON standard.
To view statistics:
STEP 1 Click Status and Statistics > RMON > Statistics in the navigation window.
STEP 2 Select the port or LAG for which you want to display statistics.
STEP 3 Select a refresh rate for the page.
The following information displays for the selected interface:
• Bytes Received—Octets received on the interface since the switch was last
refreshed. This number includes bad packets and FCS octets, but excludes
framing bits.
• Drop Events—Number of times that packets have been dropped on the
interface since the switch was last refreshed.
• Packets Received—Packets received on the interface, including bad
packets, multicast and broadcast packets, since the switch was last
refreshed.
• Broadcast Packets Received—Good broadcast packets received on the
interface since the switch was last refreshed. This number does not include
multicast packets.