Netgear XCM8806 Chassis User Manual - Page 235
Statistics, History, Alarms, Events, RMON Probe Configuration Parameters
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NETGEAR 8800 User Manual Statistics The RMON Ethernet Statistics group provides traffic and error statistics showing packets, bytes, broadcasts, multicasts, and errors on an Ethernet port. Information from the Statistics group is used to detect changes in traffic and error patterns in critical areas of the network. History The History group provides historical views of network performance by taking periodic samples of the counters supplied by the Statistics group. The group features user-defined sample intervals and bucket counters for complete customization of trend analysis. The group is useful for analysis of traffic patterns and trends on an Ethernet port, and to establish baseline information indicating normal operating parameters. Alarms The Alarms group provides a versatile, general mechanism for setting threshold and sampling intervals to generate events on any RMON variable. Both rising and falling thresholds are supported, and thresholds can be on the absolute value of a variable or its delta value. Note that creating an entry in the alarmTable does not validate the alarmVariable and does not generate a badValue error message. Alarms inform you of a network performance problem and can trigger automated action responses through the Events group. Events The Events group creates entries in an event log and/or sends SNMP traps to the management workstation. An event is triggered by an RMON alarm. The action taken can be configured to ignore it, to log the event, to send an SNMP trap to the receivers listed in the trap receiver table, or to both log and send a trap. The RMON traps are defined in RFC 1757 for rising and falling thresholds. Effective use of the Events group saves you time. Rather than having to watch real-time graphs for important occurrences, you can depend on the Events group for notification. Through the SNMP traps, events can trigger other actions, which provides a mechanism for an automated response to certain occurrences. RMON Probe Configuration Parameters The RMON probe configuration parameters supported in XCM8800 are a subset of the probe configuration group as defined in RFC 2021. The probe configuration group controls and defines the operation of the RMON agent. You can configure the following objects: • probeCapabilities-If you configure the probeCapabilities object, you can view the RMON MIB groups supported on at least one interface by the probe. Chapter 8. Status Monitoring and Statistics | 235
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