rfc1271.txt

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Remote Network Monitoring Working Group                        [Page 22]

RFC 1271             Remote Network Monitoring MIB         November 1991


              ACCESS not-accessible
              STATUS mandatory
              DESCRIPTION
                  "A list of Ethernet history entries."
              ::= { history 2 }

          etherHistoryEntry OBJECT-TYPE
              SYNTAX EtherHistoryEntry
              ACCESS not-accessible
              STATUS mandatory
              DESCRIPTION
                  "An historical sample of Ethernet statistics on a
                  particular Ethernet interface.  This sample is
                  associated with the historyControlEntry which set
                  up the parameters for a regular collection of these
                  samples."
              INDEX { etherHistoryIndex , etherHistorySampleIndex }
              ::= { etherHistoryTable 1 }

          EtherHistoryEntry ::= SEQUENCE {
              etherHistoryIndex                 INTEGER (1..65535),
              etherHistorySampleIndex           INTEGER,
              etherHistoryIntervalStart         TimeTicks,
              etherHistoryDropEvents            Counter,
              etherHistoryOctets                Counter,
              etherHistoryPkts                  Counter,
              etherHistoryBroadcastPkts         Counter,
              etherHistoryMulticastPkts         Counter,
              etherHistoryCRCAlignErrors        Counter,
              etherHistoryUndersizePkts         Counter,
              etherHistoryOversizePkts          Counter,
              etherHistoryFragments             Counter,
              etherHistoryJabbers               Counter,
              etherHistoryCollisions            Counter,
              etherHistoryUtilization           INTEGER (0..10000)
          }

          etherHistoryIndex OBJECT-TYPE
              SYNTAX INTEGER (1..65535)
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "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."
              ::= { etherHistoryEntry 1 }




Remote Network Monitoring Working Group                        [Page 23]

RFC 1271             Remote Network Monitoring MIB         November 1991


          etherHistorySampleIndex OBJECT-TYPE
              SYNTAX INTEGER
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "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."
              ::= { etherHistoryEntry 2 }

          etherHistoryIntervalStart OBJECT-TYPE
              SYNTAX TimeTicks
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "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 that 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.  Also note that the sample which
                  is currently being collected is not accessible in this
                  table until the end of its interval."
              ::= { etherHistoryEntry 3 }

          etherHistoryDropEvents OBJECT-TYPE
              SYNTAX Counter
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "The total number of events in which packets
                  were dropped by the probe due to lack of resources
                  during this 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."
              ::= { etherHistoryEntry 4 }

          etherHistoryOctets OBJECT-TYPE
              SYNTAX Counter
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "The total number of octets of data (including



Remote Network Monitoring Working Group                        [Page 24]

RFC 1271             Remote Network Monitoring MIB         November 1991


                  those in bad packets) received on the
                  network (excluding framing bits but including
                  FCS octets)."
              ::= { etherHistoryEntry 5 }

          etherHistoryPkts OBJECT-TYPE
              SYNTAX Counter
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "The number of packets (including error packets)
                  received during this sampling interval."
              ::= { etherHistoryEntry 6 }

          etherHistoryBroadcastPkts OBJECT-TYPE
              SYNTAX Counter
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "The number of good packets received during this
                  sampling interval that were directed to the
                  broadcast address."
              ::= { etherHistoryEntry 7 }

          etherHistoryMulticastPkts OBJECT-TYPE
              SYNTAX Counter
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "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."
              ::= { etherHistoryEntry 8 }

          etherHistoryCRCAlignErrors OBJECT-TYPE
              SYNTAX Counter
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "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 were not an
                  integral number of octets in length or had a
                  bad Frame Check Sequence (FCS)."
              ::= { etherHistoryEntry 9 }




Remote Network Monitoring Working Group                        [Page 25]

RFC 1271             Remote Network Monitoring MIB         November 1991


          etherHistoryUndersizePkts OBJECT-TYPE
              SYNTAX Counter
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "The number of packets received during this
                  interval that were less than 64 octets long
                  (excluding framing bits but including FCS
                  octets) and were otherwise well formed."
              ::= { etherHistoryEntry 10 }

          etherHistoryOversizePkts OBJECT-TYPE
              SYNTAX Counter
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "The number of packets received during this
                  interval that were longer than 1518 octets
                  (excluding framing bits but including FCS
                  octets) but were otherwise well formed."
              ::= { etherHistoryEntry 11 }

          etherHistoryFragments OBJECT-TYPE
              SYNTAX Counter
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "The total number of packets received during this
                  sampling interval that were not an integral
                  number of octets in length or that
                  had a bad Frame Check Sequence (FCS), and
                  were less than 64 octets in length (excluding
                  framing bits but including FCS octets)."
              ::= { etherHistoryEntry 12 }

          etherHistoryJabbers OBJECT-TYPE
              SYNTAX Counter
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "The number of packets received during this
                  interval that were longer than 1518 octets
                  (excluding framing bits but including FCS octets),
                  and were not an integral number of octets in
                  length or had a bad Frame Check Sequence (FCS)."
              ::= { etherHistoryEntry 13 }





Remote Network Monitoring Working Group                        [Page 26]

RFC 1271             Remote Network Monitoring MIB         November 1991


          etherHistoryCollisions OBJECT-TYPE
              SYNTAX Counter
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "The best estimate of the total number of collisions
                  on this Ethernet segment during this interval."
              ::= { etherHistoryEntry 14 }

          etherHistoryUtilization OBJECT-TYPE
              SYNTAX INTEGER (0..10000)
              ACCESS read-only
              STATUS mandatory
              DESCRIPTION
                  "The best estimate of the mean physical layer
                  network utilization on this interface during this
                  interval, in hundredths of a percent."
              ::= { etherHistoryEntry 15 }


          -- The Alarm Group

          -- Implementation of the Alarm group is optional.
          --
          -- The Alarm Group requires the implementation of the Event
          -- group.
          --
          -- The Alarm group periodically takes statistical samples from
          -- variables in the probe and compares them to thresholds
          -- that have been configured.  The alarm table stores
          -- configuration entries that each define a variable,
          -- polling period, and threshold parameters.  If a sample is
          -- found to cross the threshold values, an event is
          -- generated.  Only variables that resolve to an ASN.1
          -- primitive type of INTEGER (INTEGER, Counter,
          -- Gauge, or TimeTicks) may be monitored in this way.
          --
          -- This function has a hysteresis mechanism to limit the
          -- generation of events.  This mechanism generates one event
          -- as a threshold is crossed in the appropriate direction.
          -- No more events are generated for that threshold until the
          -- opposite threshold is crossed.
          --
          -- In the case of a sampling a deltaValue, a probe may
          -- implement this mechanism with more precision if it takes
          -- a delta sample twice per period, each time comparing the
          -- sum of the latest two samples to the threshold.  This
          -- allows the detection of threshold crossings



Remote Network Monitoring Working Group                        [Page 27]

RFC 1271             Remote Network Monitoring MIB         November 1991


          -- that span the sampling boundary.  Note that this does not
          -- require any special configuration of the threshold value.
          -- It is suggested that probes implement this more precise
          -- algorithm.

          alarmTable OBJECT-TYPE
              SYNTAX SEQUENCE OF AlarmEntry
              ACCESS not-accessible
              STATUS mandatory
              DESCRIPTION
                  "A list of alarm entries."
              ::= { alarm 1 }

          alarmEntry OBJECT-TYPE
              SYNTAX AlarmEntry
              ACCESS not-accessible
              STATUS mandatory
              DESCRIPTION
                  "A list of parameters that set up a periodic checking