Displaying RMON Ethernet statistics

RMON statistics provide count information on multicast and broadcast packets. This information includes total packets sent, undersized and oversized packets, CRC alignment errors, jabbers, collisions, fragments, and dropped events for each port on the system. RMON statistics collection is activated automatically during system startup, and requires no configuration.

To display RMON statistics, perform the following steps.

  1. Click Monitor on the left pane and select RMON.
  2. Click Statistic.
  3. Select a unit ID in the Select Stack Unit ID list and click Display to view information about a specific stack unit.

    The RMON Ethernet Statistics window is displayed as shown in the figure below.

    Monitoring RMON Ethernet statistics

    Description of the fields in the RMON Ethernet Statistics window

    Field

    Description

    Port

    Displays the port number - stack-unit/slotnum/portnum.

    Octets

    Displays the total number of octets of data received on the network.

    This number includes octets in bad packets.

    This number does not include framing bits but does include Frame Check Sequence (FCS) octets.

    Packets

    Displays the total number of packets received.

    This number includes bad packets, broadcast packets, and multicast packets.

    Packets: Broadcast

    Displays the total number of good packets received that were directed to the broadcast address.

    This number does not include multicast packets.

    Packets: Multicast

    Displays the total number of good packets received that were directed to a multicast address.

    This number does not include packets directed to the broadcast address.

    Octet Packets: 64

    Displays the total number of packets received that were 64 octets long.

    This number includes bad packets.

    This number does not include framing bits but does include FCS octets.

    Octet Packets: 65 - 127

    Displays the total number of packets received that were from 65 through 127 octets long.

    This number includes bad packets.

    This number does not include framing bits but does include FCS octets.

    Octet Packets: 128 - 255

    Displays the total number of packets received that were from 128 through 255 octets long.

    This number includes bad packets.

    This number does not include framing bits but does include FCS octets.

    Octet Packets: 256 - 511

    Displays the total number of packets received that were from 256 through 511 octets long.

    This number includes bad packets.

    This number does not include framing bits but does include FCS octets.

    Octet Packets: 512 - 1023

    Displays the total number of packets received that were from 512 through 1023 octets long.

    This number includes bad packets.

    This number does not include framing bits but does include FCS octets.

    Octet Packets: 1024 - 1518

    Displays the total number of packets received that were from 1024 through 1518 octets long.

    This number includes bad packets.

    This number does not include framing bits but does include FCS octets.

    Owner

    Displays the owner of the packets.

    Status

    Displays the status of the port.

    Up Time

    Displays the length of time the device has been available.

    Last Clear Time

    Displays the length of time data has been accumulating in the current table.

    To remove the current data in the table and restart monitoring, click Clear. To stop reporting the statistics, click Stop Polling.

    The RMON Ethernet Statistics window contains the following links:

    • To change the polling interval, click Change Polling interval. For more information, refer to the “Changing polling interval” section.
    • To display the RMON Ethernet error statistics, click RMON Ethernet Error Statistics. For more information, refer to the “Displaying RMON Ethernet error statistics” section.
Parent topic: Monitoring RMON