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Background: Know: auxiliary Index , Counter , OID , Owner , EntryStatus , Recognize: Prerequisites - Ethernet


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RMON1 EtherStatsEdit

EtherStatsEntryEdit

  • etherStatsDropEvents is the number of events that packets are dropped received by the port in an interval.
  • etherStatsOctets is the bytes of all the messages received by the port in an interval.
  • etherStatsPkts is the number of all the messages received by the port in an interval.
  • etherStatsBroadcastPkts is the number of all the broadcast packets received by the port in an interval.
  • etherStatsMulticastPkts is the number of all the multicast packets received by the port in an interval.
  • etherStatsCRCAlignErrors is the number of all the error packets checked using CRC (Cyclical Redundancy Check) received by the port in an interval.
  • etherStatsUndersizePkts is the number of all the undersized packets received by the port in an interval.
  • etherStatsOversizePkts is the number of all the oversized packets received by the port in an interval.
  • etherStatsFragments is the number of all the undersized and invalid packets received by the port in an interval.
  • etherStatsJabbers is the number of all the oversized and invalid packets received by the port in an interval.
  • etherStatsCollisions is the number of all the colliding packets received by the port in an interval.

The packets are also counted according to their lenth:

  • etherStatsPkts64Octets: the lenth of packet is 64 bytes.
  • etherStatsPkts65to127Octets: the lenth of packet is from 65 to127.
  • etherStatsPkts128to255Octets: the lenth of packet is from128 to 255.
  • etherStatsPkts256to511Octets: the lenth of packet is from 256 to 511.
  • etherStatsPkts512to1023Octets: the lenth of packet is from 512 to 1023.
  • etherStatsPkts1024to1518Octets: the lenth of packet is from 1024 to 1518.

EtherHistoryEntryEdit

After the port creates the history table, the system will analyze the information from the port in a period and save them in a history table.

Most of the coloms are like those in EtherStatsEntry, while it has new colomns, etherHistorySampleIndex and etherHistoryUtilization.

etherHistorySampleIndex is the peroid of statistics.

etherHistoryUtilization is the rate of bandwidth utilization in the period of time.

See alsoEdit

Corresponding TELE9752 lecture slide

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