Status and Statistics
RMON
Cisco 350, 350X and 550X Series Managed Switches, Firmware Release 2.4, ver 0.4 73
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Statistics
The Statistics page displays detailed information regarding packet sizes and information
regarding physical layer errors. The information is displayed according to the RMON
standard. An oversized packet is defined as an Ethernet frame with the following criteria:
• Packet length is greater than MRU byte size.
• Collision event has not been detected.
• Late collision event has not been detected.
• Received (Rx) error event has not been detected.
• Packet has a valid CRC.
To view RMON statistics and/or set the refresh rate:
STEP 1 Click Status and Statistics > RMON > Statistics.
STEP 2 Select the Interface for which Ethernet statistics are to be displayed.
STEP 3 Select the Refresh Rate, which is the time period that passes before the interface statistics are
refreshed.
The following statistics are displayed for the selected interface.
NOTE If one of the following fields shows a number of errors (not 0), a Last Update time is displayed.
• Bytes Received—Octets received, including bad packets and FCS octets, but excluding
framing bits.
• Drop Events—Packets dropped.
• Packets Received—Good packets received, including Multicast and Broadcast
packets.
• Broadcast Packets Received—Good Broadcast packets received. This number does
not include Multicast packets.
• Multicast Packets Received—Good Multicast packets received.
• CRC & Align Errors—CRC and Align errors that have occurred.
• Undersize Packets—Undersized packets (less than 64 octets) received.
• Oversize Packets—Oversized packets (over 2000 octets) received.
• Fragments—Fragments (packets with less than 64 octets, excluding framing bits, but
including FCS octets) received.
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