RMON history items
This table describes the RMON History tab items on the RmonControl dialog box..
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Index
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An index that uniquely identifies an entry in the historyControl table. Each such entry defines a set of samples at a particular interval for an interface on the device.
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Port
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This object identifies the source of the data for which historical data was collected and placed in a media-specific table on behalf of this historyControlEntry. This source can be any interface on this device. In order to identify a particular interface, this object shall identify the instance of the ifIndex object, defined in [4,6], for the desired interface. For example, if an entry were to receive data from interface #1, this object would be set to ifIndex.1. The statistics in this group reflect all packets
on the local network segment attached to the identified interface. This object may not be modified if the associated historyControlStatus object is equal to valid(1).
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BucketsRequested
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The requested number of discrete time intervals over which data is to be saved in the part of the media-specific table associated with this historyControl entry. When this object is created or modified, the probe should set historyControlBucketsGranted as closely to this object as is possible for the particular probe implementation and available resources.
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BucketsGranted
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The number of discrete sampling intervals over which data shall be saved in the part of the media-specific table associated with this history control entry. When the associated BucketsRequested object is created or modified, the probe should set this object as closely to the requested value as possible for the particular probe implementation and available resources. The probe must not lower this value except as a result of a modification to the associated BucketsRequested object. There will be times when the actual number of buckets associated with this entry is less than the value of this object. In this case, at the end of each sampling interval, a new bucket will be added to the media-specific table. When the number of buckets reaches the value of this object and a new bucket is to be added to the media-specific table, the oldest bucket associated with this entry shall be deleted by the agent so that the new bucket can be added. When the value of this object changes to a value less than the current value, entries are deleted from the media-specific table associated with this entry. Enough of the oldest of these entries shall be deleted by the agent so that their number remains less than or equal to the new value of this object. When the value of this object changes to a value greater than the current value, the number of associated media-specific entries may be allowed to grow.
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Interval
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The interval in seconds over which the data is sampled
for each bucket in the part of the media-specific table associated with this historyControl entry. This interval can be set to any number of seconds between 1 and 3600
(1 hour). Because the counters in a bucket may overflow at their maximum value with no indication, a prudent manager will take into account the possibility of overflow in any of the associated counters. It is important to consider the minimum time in which any counter could overflow on a particular media type and set the historyControlInterval object to a value less than this interval. This is typically most important for the "octets" counter in any media-specific table. For example, on an Ethernet network, the etherHistoryOctets counter could overflow in about one hour at the Ethernet's maximum utilization. This object may not be modified if the associated historyControlStatus object is equal to valid(1).
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Owner
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The entity that configured this entry and is therefore using the resources assigned to it.
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See Also
