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etherHistoryIndex
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The history of which this entry is a part. The history identified by a particular value of this index is the same history as identified by the same value of historyControlIndex.
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etherHistorySampleIndex
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An index that uniquely identifies the particular sample this entry represents among all samples associated with the same historyControlEntry. This index starts at 1 and increases by one as each new sample is taken.
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etherHistoryIntervalStart
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The value of sysUpTime at the start of the interval over which this sample was measured. If the probe keeps track of the time of day, it should start the first sample of the history at a time such that when the next hour of the day begins, a sample is started at that instant.
Note: Following this rule may require the probe to delay collecting the first sample of the history, as each sample must be of the same interval. The sample which is currently being collected is not accessible in this table until the end of its interval.
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etherHistoryDropEvents
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The total number of events in which packets were dropped by the probe due to lack of resources during this sampling interval. 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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etherHistoryOctets
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The total number of octets of data (including those in bad packets) received on the network (excluding framing bits but including FCS octets).
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etherHistoryPkts
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The number of packets (including bad packets) received during this sampling interval.
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etherHistoryBroadcastPkts
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The number of good packets received during this sampling interval that were directed to the broadcast address.
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etherHistoryMulticastPkts
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The number of good packets received during this sampling interval that were directed to a multicast address. Note that this number does not include packets addressed to the broadcast address.
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etherHistoryCRCAlignErrors
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The number of packets received during this sampling interval that had a length (excluding framing bits but including FCS octets) between 64 and 1518 octets, inclusive, but 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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etherHistoryUndersizePkts
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The number of packets received during this sampling that were less than 64 octets long (excluding framing bits but including FCS octets) and were otherwise well formed.
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etherHistoryOversizePkts
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The number of packets received during this sampling that were longer than 1518 octets (excluding framing bits but including FCS octets) but were otherwise well formed.
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etherHistoryFragments
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The total number of packets received during this sampling interval that were less than 64 octets in length (excluding graming 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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etherHistoryJabbers
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The number of packets received during this sampling interval 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).
The allowed range to detect jabber is between 20 ms and 150 ms.
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etherHistoryCollisions
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The best estimate of the total number of collisions on this Ethernet segment during this sampling interval.
The value returned depends on the location of the RMON probe.
Note: an RMON probe inside a repeater should ideally report collisions between the repeater and one or more other hosts as well as receiver collisions observerd on any coax segments to which the repeater is connected.
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etherHistoryUtilization
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The best estimate of the mean physical layer network utilization on this interface during this sampling interval, in hundredths of a percent.
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