This section explains the RMON options available from the Statistics/RMON menu page. These options include viewing statistics in table form, editing and viewing RMON statistics, and charting Port and LAG statistics. The Statistics/RMON menu page provides access to these options through the following menu pages:
The Table Views menu page contains links to web pages that display statistics in table form. To display this page, click Statistics/RMON→Table Views in the tree view. Following are the web pages accessible from this menu page:
Use the Interface Statisticspage to display statistics for both received and transmitted packets. The fields for both received and transmitted packets are identical.
The Interface Statistics page contains the following fields:
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Interface — Select physical interface (unit, port) or LAG interface for which statistics is displayed.
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Refresh Rate — Specifies amount of time that passes before statistics are refreshed. The possible field values are No Refresh, 15, 30 and 60 seconds. Default is No Refresh.
The Etherlike Statistics page contains the following fields:
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Interface — Select physical interface (unit, port) or LAG interface for which statistics is displayed.
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Refresh Rate — Specifies amount of time that passes before statistics are refreshed. The possible field values are No Refresh, 15, 30 and 60 seconds. Default is No Refresh.
Oversize Packets — Displays the total number of packets received that were longer than 1518 octets (excluding framing bits, but including FCS octets) and were otherwise well formed.
The GVRP Statistics page contains the following fields:
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Interface — Select physical interface (unit, port) or LAG interface for which statistics will be displayed.
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Refresh Rate — Specifies amount of time that passes before statistics are refreshed. The possible field values are No Refresh, 15, 30, and 60 seconds. Default is No Refresh.
Use the EAP Statistics page to display information about EAP packets received on a specific port. For more information about EAP, see "Dot1x Authentication."
To display the EAP Statistics page, click Statistics/RMON→Table Views→EAP Statistics in the tree view.
The EAP Statistics page contains the following fields:
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Interface — Specifies the interface which is polled for statistics.
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Refresh Rate — Specifies amount of time that passes before statistics are refreshed. The possible field values are No Refresh, 15, 30, and 60 seconds. Default is No Refresh.
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Frames Received — Displays the number of valid EAPOL frames received on the port.
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Frames Transmitted — Displays the number of EAPOL frames transmitted through the port.
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Start Frames Received — Displays the number of EAPOL Start frames received on the port.
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Log off Frames Received — Displays the number of EAPOL Log off frames that have been received on the port.
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Respond ID Frames Received — Displays the number of EAP Respond ID frames that have been received on the port.
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Respond Frames Received — Displays the number of valid EAP Respond frames received on the port.
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Request ID Frames Received — Displays the number of EAP Request ID frames that have been received on the port.
The Utilization Summary page contains the following fields:
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Unit — Specifies the unit for which statistics are displayed.
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Refresh Rate — Specifies amount of time that passes before statistics are refreshed. The possible field values are No Refresh, 15, 30, and 60 seconds. Default is No Refresh.
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Interface — Specifies the interface for which statistics are displayed.
Interface Utilization % — Displays network interface utilization percentage based on the duplex mode of the interface. The range of this reading is from 0 to 200%. The maximum reading of 200% for a full-duplex connection indicates that 100% of bandwidth of incoming and outgoing connections is used by the traffic travelling through the interface. The maximum reading for a half-duplex connection is 100%.
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Unicast Received% — Displays percentage of Unicast packets received on the interface.
The Counter Summary page contains the following fields:
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Unit — Specifies the unit for which statistics are displayed.
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Refresh Rate — Specifies amount of time that passes before statistics are refreshed. The possible field values are No Refresh, 15, 30, and 60 seconds. Default is No Refresh.
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Interface — Specifies the interface for which statistics are displayed.
The RMON Statistics page contains the following fields:
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Interface — Specifies whether statistics are shown for a Unit or a LAG as well as which Unit/LAG is displayed.
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Refresh Rate — Specifies amount of time that passes before statistics are refreshed. The possible field values are No Refresh, 15, 30, and 60 seconds. Default is No Refresh.
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Drop Events — Displays number of dropped events that have occurred on the interface since the switch was last refreshed.
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Received Bytes (Octets) — Displays number of octets received on the interface since the switch was last refreshed. This number includes bad packets and FCS octets, but excludes framing bits.
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Received Packets — Displays number of packets received on the interface, including bad packets, multicast and broadcast packets, since the switch was last refreshed.
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Broadcast Packets Received — Displays number of good broadcast packets received on the interface since the switch was last refreshed. This number does not include multicast packets.
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Multicast Packets Received — Displays number of good multicast packets received on the interface since the switch was last refreshed.
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CRC & Align Errors — Displays number of CRC and Align errors that have occurred on the interface since the switch was last refreshed.
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Undersize Packets — Displays number of undersized packets (less than 64 octets) received on the interface since the switch was last refreshed.
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Oversize Packets — Displays number of oversized packets (over 1518 octets) received on the interface since the switch was last refreshed.
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Fragments — Displays number of fragments (packets with less than 64 octets, excluding framing bits, but including FCS octets) received on the interface since the switch was last refreshed.
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Jabbers — Displays number of packets received that were more than 1,518 octets long and had a FCS during the sampling session.
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Collisions — Displays number of collisions received on the interface since the switch was last refreshed.
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Frames of 64 Bytes — Displays number of 64-byte frames received on the interface since the switch was last refreshed.
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Frames of 65 to 127 Bytes — Displays number of 65- to127-byte frames received on the interface since the switch was last refreshed.
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Frames of 128 to 255 Bytes — Displays number of 128- to 255-byte frames received on the interface since the switch was last refreshed.
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Frames of 256 to 511 Bytes — Displays number of 256- to 511-byte frames received on the interface since the switch was last refreshed.
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Frames of 512 to 1023 Bytes — Displays number of 512- to 1023-byte frames received on the interface since the switch was last refreshed.
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Frames of 1024 to 1518 Bytes — Displays number of 1024- to 1518-byte frames received on the interface since the switch was last refreshed.
Use the RMON History Control page to maintain a history of statistics on each port. For each interface (either a physical port or a port-channel), you can define how many buckets exist, and the time interval between each bucket snapshot.
Sampling Interval (1–3600) — Sets the frequency at which samplings are taken from the ports. The possible values are from 1 to 3600 seconds. The default is 1800 seconds (30 minutes).
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Remove — Removes the RMONHistory Control Tableentry displayed when checked.
The RMON History Table page contains the following fields:
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History Entry No. — Selects the history entry number to display on the RMON History Table.
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Owner — Displays RMON statistics group owner name, if available.
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Source Interface — Indicates the Interface or LAG where the statistics are being collected.
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Max No. of Samples to Keep — Determines the length of the list in the History table for each History Entry No.
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Sampling Interval — Sets the time in seconds between successive samples.
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Sample No. — Indicates the specific sample the information in the table reflects.
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Drop Events — Displays the total number of events in which packets were dropped by the port due to lack of resources. Note that this number is not necessarily the number of packets dropped; it is just the number of times this condition has been detected.
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Received Bytes (Octets)— Displays the total number of octets of data (including those in bad packets) received on the network (excluding framing bits but including Frame Check Sequence (FCS) octets).
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Received Packets — Displays the total number of packets received (including bad packets, broadcast packets, and multicast packets) during the sampling interval.
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Broadcast Packets — Displays the total number of good packets received that were directed to the broadcast address. Note that this does not include multicast packets.
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Multicast Packets — Displays the total number of good packets received that were directed to a multicast address. Note that this number does not include packets directed to the broadcast address.
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CRC Align Errors — Displays the total number of packets received that had a length (excluding framing bits, but including FCS octets) of between 64 and 1518 octets, inclusive, but had either a bad FCS with an integral number of octets, (FCS Error) or a bad FCS with a non-integral number of octets (Alignment Error).
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Undersize Packets — Displays the total number of packets received that were less than 64 octets long (excluding framing bits, but including FCS octets) and were otherwise well formed.
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Oversize Packets — Displays the total number of packets received that were longer than 1518 octets (excluding framing bits, but including FCS octets) and were otherwise well formed.
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Fragments — Displays the total number of packets received that were less than 64 octets in length (excluding framing bits but including (FCS) with an integral number of octets (FCS Error) or a bad FCS with a non-integral number of octets (Alignment Error).
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Jabbers — Displays the total number of packets received that were longer than 1518 octets (excluding framing bits, but including FCS octets), and had either a bad Frame Check Sequence (FCS) with an integral number of octets (FCS Error), or a bad FCS with a non-integral number of octets (Alignment Error).
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Collisions — Displays the best estimate of the total number of collisions on this Ethernet segment.
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Utilization — Estimates the main physical layer network usage on an interface during the session sampling. The value is reflected hundredths of percent.
Use the RMON Events Control page to define RMON events. Events are used by RMON alarms to force some action when a threshold is crossed for a particular RMON counter. The event information can be stored in a log and/or sent as a trap to a trap receiver.
Use the RMON Alarms page to set network alarms. Alarms occur when certain thresholds are crossed for the configured RMON counters. The alarm triggers an event to occur. The events can be configured as part of the RMON Events group. For more information about events, see "RMON Event Log."
Sample Type — Displays the sampling method for the selected variable and comparing the value against the thresholds. The possible field values are:
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Delta — Subtracts the last sampled value from the current value. The difference in the values is compared to the threshold.
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Absolute — Compares the values directly with the thresholds at the end of the sampling interval. This is the default.
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Rising Threshold (0–2147483647) — Displays the rising counter value that triggers the rising threshold alarm. The rising threshold is presented on top of the graph bars. Each monitored variable is designated a color. The default is 100.
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Rising Event — Displays the mechanism in which the alarms are reported, including a log, a trap, or both. When a log is selected, there is no saving mechanism either in the switch or in the management system. However, if the switch is not being reset, the event remains in the switch Log table. If a trap is selected, an SNMP trap is generated and reported through the Trap mechanism. The trap can be saved using the same mechanism.
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Falling Threshold (0–2147483647) — Displays the falling counter value that triggers the falling threshold alarm. The falling threshold is graphically presented on top of the graph bars. Each monitored variable is designated a color. The default is 20.
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Falling Event — Displays the mechanism in which the alarms are reported, including a log, a trap, or both. When a log is selected, there is no saving mechanism either in the switch or in the management system. However, if the switch is not being reset, the event remains in the switch Log table. If a trap is selected, an SNMP trap is generated and reported through the Trap mechanism. The trap can be saved using the same mechanism.
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Startup Alarms — Displays the type of event. Options are rising, rising-falling, and falling.
The Chart menu page contains links to web pages that allow you to chart statistics on a graph. To display the Charts menu page, click Statistics/RMON→Chartsin the tree view. The Charts menu page contains links to the following features:
Interface Statistics — Selects Interface Statistics when clicked, and specifies the type of interface statistics to graph from the drop-down menu. The default is Received Rate (MFrame Bits/sec).
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Etherlike Statistics — Selects Etherlike Statistics when clicked, and specifies the type of etherlike statistics to graph from the drop-down menu. The default is Frame Check Sequence (FCS) Errors.
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RMON Statistics — Selects RMON Statistics when clicked, and specifies the type of RMON statistics to graph from the drop-down menu. The default is Drop Events.
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GVRP Statistics — Selects GVRP Statistics when clicked, and specifies the type of GVRP statistics to graph from the drop-down menu. The default is Join Empty - Receive.
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Refresh Rate — Selects the amount of time that passes before statistics are refreshed. The possible field values are No Refresh, 15, 30 and 60 seconds. The default rate is No Refresh.
The LAG Statistics page contains the following fields:
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Interface Statistics — Selects Interface Statistics when clicked, and specifies the type of interface statistics to graph from the drop-down menu. The default is Received Rate.
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Etherlike Statistics — Selects Etherlike Statistics when clicked, and specifies the type of etherlike statistics to graph from the drop-down menu. The default is Frame Check Sequence Errors.
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RMON Statistics — Selects RMON Statistics when clicked, and specifies the type of RMON statistics to graph from the drop-down menu. The default is Drop Events.
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GVRP Statistics — Selects GVRP Statistics when clicked, and specifies the type of GVRP statistics to graph from the drop-down menu. The default is Join Empty - Receive.
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Refresh Rate — Selects the amount of time that passes before statistics are refreshed. The possible field values are No Refresh, 15, 30 and 60 seconds. The default rate is 15 seconds.
