rfc2493.txt

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     --       interval is the maximum interval number for
     --       which data is available."
     --       ::= { xxx }

     -- xyzInvalidIntervals OBJECT-TYPE
     --     SYNTAX  INTEGER (0..<n>)
     --     MAX-ACCESS  read-only
     --     STATUS  current
     --     DESCRIPTION
     --       "The number of intervals in the range from
     --        0 to xyzValidIntervals for which no
     --        data is available. This object will typically
     --        be zero except in cases where the data for some
     --        intervals are not available (e.g., in proxy
     --        situations)."
     --       ::= { xxx }

     PerfCurrentCount ::= TEXTUAL-CONVENTION
           STATUS  current
           DESCRIPTION
              "A counter associated with a
               performance measurement in a current 15
               minute measurement interval. The value
               of this counter starts from zero and is



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RFC 2493        15 Minute Based Performance History TCs     January 1999


               increased when associated events occur,
               until the end of the 15 minute interval.
               At that time the value of the counter is
               stored in the first 15 minute history
               interval, and the CurrentCount is
               restarted at zero. In the
               case where the agent has no valid data
               available for the current interval the
               corresponding object instance is not
               available and upon a retrieval request
               a corresponding error message shall be
               returned to indicate that this instance
               does not exist (for example, a noSuchName
               error for SNMPv1 and a noSuchInstance for
               SNMPv2 GET operation)."
            SYNTAX  Gauge32

     PerfIntervalCount ::= TEXTUAL-CONVENTION
           STATUS  current
           DESCRIPTION
              "A counter associated with a
               performance measurement in a previous
               15 minute measurement interval. In the
               case where the agent has no valid data
               available for a particular interval the
               corresponding object instance is not
               available and upon a retrieval request
               a corresponding error message shall be
               returned to indicate that this instance
               does not exist (for example, a noSuchName
               error for SNMPv1 and a noSuchInstance for
               SNMPv2 GET operation).
               In a system supporting
               a history of n intervals with
               IntervalCount(1) and IntervalCount(n) the
               most and least recent intervals
               respectively, the following applies at
               the end of a 15 minute interval:
               - discard the value of IntervalCount(n)
               - the value of IntervalCount(i) becomes that
                 of IntervalCount(i-1) for n >= i > 1
               - the value of IntervalCount(1) becomes that
                 of CurrentCount
               - the TotalCount, if supported, is adjusted."
            SYNTAX  Gauge32

     PerfTotalCount ::= TEXTUAL-CONVENTION
           STATUS  current



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           DESCRIPTION
              "A counter associated with a
               performance measurements aggregating the
               previous valid 15 minute measurement
               intervals. (Intervals for which no valid
               data was available are not counted)"
            SYNTAX  Gauge32


     END

7.  Acknowledgments

   This document is a product of the AToMMIB and TrunkMIB Working
   Groups.

8.  References

   [1]  Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
        "Textual Conventions for Version 2 of the Simple Network
        Management Protocol (SNMPv2)", RFC 1903, January 1996.

   [2]  Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
        "Structure of Management Information for Version 2 of the Simple
        Network Management Protocol (SNMPv2)", RFC 1902, January 1996.

   [3]  Fowler, D., "Definitions of Managed Objects for the DS1, E1, DS2
        and E2 Interface Types", RFC 2495, January 1999.

   [4]  Fowler, D., "Definitions of Managed Objects for the DS3/E3
        Interface Type", RFC 2496, January 1999.

   [5]  Tesink, K., "Definitions of Managed Objects for the SONET/SDH
        Interface Type", Work in Progress.

   [6]  American National Standard for Telecommunications - Digital
        Hierarchy - Layer 1 In-Service Digital Transmission Performance
        Monitoring, ANSI T1.231-1997, September 1997.













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9.  Security Considerations

   This memo defines textual conventions for use in other MIB modules.
   Security issues for these MIB modules are addressed in the memos
   defining those modules.

10.  IANA Considerations

   Prior to publication of this memo as an RFC, IANA is requested to
   make a suitable OBJECT IDENTIFIER assignment.

11.  Author's Address

   Kaj Tesink
   Bellcore
   331 Newman Springs Road
   P.O. Box 7020
   Red Bank, NJ  07701-7020

   Phone: [phone]
   EMail: [e-mail]

12.  Intellectual Property

   The IETF takes no position regarding the validity or scope of any
   intellectual property or other rights that might be claimed to
   pertain to the implementation or use of the technology described in
   this document or the extent to which any license under such rights
   might or might not be available; neither does it represent that it
   has made any effort to identify any such rights.  Information on the
   IETF's procedures with respect to rights in standards-track and
   standards-related documentation can be found in BCP-11.  Copies of
   claims of rights made available for publication and any assurances of
   licenses to be made available, or the result of an attempt made to
   obtain a general license or permission for the use of such
   proprietary rights by implementors or users of this specification can
   be obtained from the IETF Secretariat.

   The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights which may cover technology that may be required to practice
   this standard.  Please address the information to the IETF Executive
   Director.








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13.  Full Copyright Statement

   Copyright (C) The Internet Society (1999).  All Rights Reserved.

   This document and translations of it may be copied and furnished to
   others, and derivative works that comment on or otherwise explain it
   or assist in its implementation may be prepared, copied, published
   and distributed, in whole or in part, without restriction of any
   kind, provided that the above copyright notice and this paragraph are
   included on all such copies and derivative works.  However, this
   document itself may not be modified in any way, such as by removing
   the copyright notice or references to the Internet Society or other
   Internet organizations, except as needed for the purpose of
   developing Internet standards in which case the procedures for
   copyrights defined in the Internet Standards process must be
   followed, or as required to translate it into languages other than
   English.

   The limited permissions granted above are perpetual and will not be
   revoked by the Internet Society or its successors or assigns.

   This document and the information contained herein is provided on an
   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
   TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
   BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
























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