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RMON History items

Item Description
HistoryIndex
The history of which this entry is a part. The history identified by a particular value of this index is the same hisotry identified by the same value of historyControlIndex.
SampleIndex
An index that uniquely identifies the particular sample this entry represents among all the samples associated with the same entry. This index starts at 1 and increases by one as each new sample is taken.
Utilization
The best estimate of the mean physical layer network utilization on this interface during the sampling interval (in hundredths of a percent).
Octets
The total number of octets of data (including those in bad packets) received on the network (excluding framing bits but including FCS octets). You can use this object as a reasonable estimate of Ethernet utilization. For greater precision, sample the etherStatsPkts and etherStatsOctets objects before and after a common interval.
Pkts
The total number of packets (including bad packets, broadcast packets, and multicast packets) received.
BroadcastPkts
The total number of good packets received that were directed to the broadcast address. Note that this does not include multicast packets.
MulticastPkts
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.
DropEvents
The total number of events in which packets were dropped by the probe due to lack of resources during this sampling. This number is not necessarily the number of packets dropped. It is the number of times this condition has been detected.
CRCAlignErrors
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 Frame Check Sequence (FCS) with an integral number of octets (FCS Error) or a bad FCS with a nonintegral number of octets (Alignment Error).
UndersizePkts
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.
OversizePkts
The total number of packets received that were longer than 1518 octets (excluding framing bits but including FCS octets) and were otherwise well formed.
Fragments
The total number of packets received that were less than 64 octets in length (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 nonintegral number of octets (Alignment Error). It is entirely normal for etherStatsFragments to increment because it counts both runts (which are normal occurrences due to collisions) and noise hits.
Collisions
The best estimate of the total number of collisions on this Ethernet segment.


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