INTEGRATED-SERVICES-GUARANTEED-MIB DEFINITIONS ::= BEGIN    IMPORTS            MODULE-IDENTITY, OBJECT-TYPE             FROM SNMPv2-SMI            RowStatus                                FROM SNMPv2-TC            MODULE-COMPLIANCE, OBJECT-GROUP          FROM SNMPv2-CONF            intSrv                        FROM INTEGRATED-SERVICES-MIB            ifIndex                                  FROM IF-MIB;--  This MIB module uses the extended OBJECT-TYPE macro as--  defined in [9].intSrvGuaranteed MODULE-IDENTITY        LAST-UPDATED "9511030500Z" -- Thu Aug 28 09:04:22 PDT 1997        ORGANIZATION "IETF Integrated Services Working Group"        CONTACT-INFO       "       Fred Baker       Postal: Cisco Systems               519 Lado Drive               Santa Barbara, California 93111       Tel:    +1 805 681 0115       E-Mail: fred@cisco.com"    DESCRIPTION       "The MIB module to describe the Guaranteed Service of       the Integrated Services Protocol"    ::= { intSrv 5 }intSrvGuaranteedObjects          OBJECT IDENTIFIER                                 ::= { intSrvGuaranteed 1 }intSrvGuaranteedNotifications    OBJECT IDENTIFIER                                 ::= { intSrvGuaranteed 2 }intSrvGuaranteedConformance      OBJECT IDENTIFIER                                 ::= { intSrvGuaranteed 3 }--      The Integrated Services Interface Attributes Database--      contains information that is shared with other reservation--      procedures such as ST-II.    intSrvGuaranteedIfTable OBJECT-TYPE        SYNTAX      SEQUENCE OF IntSrvGuaranteedIfEntry        MAX-ACCESS  not-accessible        STATUS      current        DESCRIPTION           "The attributes of the system's interfaces  ex-           ported by the Guaranteed Service."       ::= { intSrvGuaranteedObjects 1 }    intSrvGuaranteedIfEntry OBJECT-TYPE        SYNTAX      IntSrvGuaranteedIfEntry        MAX-ACCESS  not-accessible        STATUS      current        DESCRIPTION           "The reservable attributes of  a  given  inter-           face."       INDEX { ifIndex }       ::= { intSrvGuaranteedIfTable 1 }IntSrvGuaranteedIfEntry ::=    SEQUENCE {        intSrvGuaranteedIfBacklog INTEGER,        intSrvGuaranteedIfDelay   INTEGER,        intSrvGuaranteedIfSlack   INTEGER,        intSrvGuaranteedIfStatus  RowStatus    }    intSrvGuaranteedIfBacklog OBJECT-TYPE        SYNTAX      INTEGER (0..'0FFFFFFF'h)        UNITS       "bytes"        MAX-ACCESS  read-create        STATUS      current        DESCRIPTION           "The Backlog  parameter  is  the  data  backlog           resulting  from  the vagaries of how a specific           implementation deviates from a  strict  bit-by-           bit  service.  So, for instance, for packetized           weighted fair queueing, Backlog is set  to  the           Maximum Packet Size.           The Backlog term is measured in units of bytes.           An  individual  element can advertise a Backlog           value between 1 and 2**28 (a  little  over  250           megabytes)  and  the  total added over all ele-           ments can range as high as  (2**32)-1.   Should           the  sum of the different elements delay exceed           (2**32)-1, the end-to-end error term should  be           (2**32)-1."       ::= { intSrvGuaranteedIfEntry 1 }    intSrvGuaranteedIfDelay OBJECT-TYPE        SYNTAX      INTEGER (0..'0FFFFFFF'h)        UNITS       "microseconds"        MAX-ACCESS  read-create        STATUS      current        DESCRIPTION           "The Delay parameter at  each  service  element           should  be  set  to the maximum packet transfer           delay (independent of bucket size) through  the           service  element.   For  instance,  in a simple           router, one might compute the worst case amount           of  time  it  make  take  for a datagram to get           through the input interface to  the  processor,           and how long it would take to get from the pro-           cessor to the outbound interface (assuming  the           queueing  schemes work correctly).  For an Eth-           ernet, it might represent the worst case  delay           if  the maximum number of collisions is experi-           enced.           The Delay term is measured in units of one  mi-           crosecond.  An individual element can advertise           a delay value between  1  and  2**28  (somewhat           over two minutes) and the total delay added all           elements  can  range  as  high  as   (2**32)-1.           Should  the sum of the different elements delay           exceed (2**32)-1, the end-to-end  delay  should           be (2**32)-1."       ::= { intSrvGuaranteedIfEntry 2 }    intSrvGuaranteedIfSlack OBJECT-TYPE        SYNTAX      INTEGER (0..'0FFFFFFF'h)        MAX-ACCESS  read-create        STATUS      current        DESCRIPTION           "If a network element uses a certain amount  of           slack,  Si,  to  reduce the amount of resources           that it has reserved for a particular flow,  i,           the  value  Si  should be stored at the network           element.   Subsequently,  if  reservation   re-           freshes  are  received  for flow i, the network           element must use the same slack Si without  any           further computation. This guarantees consisten-           cy in the reservation process.           As an example for the use of  the  slack  term,           consider the case where the required end-to-end           delay, Dreq, is larger than the  maximum  delay           of the fluid flow system.  In this, Ctot is the           sum of the Backlog terms end to end,  and  Dtot           is the sum of the delay terms end to end.  Dreq           is obtained by setting R=r in the  fluid  delay           formula, and is given by                        b/r + Ctot/r + Dtot.           In this case the slack term is                  S = Dreq - (b/r + Ctot/r + Dtot).           The slack term may be used by the network  ele-           ments  to  adjust  their local reservations, so           that they can admit flows that would  otherwise           have been rejected. A service element at an in-           termediate network element that can  internally           differentiate between delay and rate guarantees           can now take advantage of this  information  to           lower the amount of resources allocated to this           flow. For example, by taking an amount of slack           s  <= S, an RCSD scheduler [5] can increase the           local delay bound, d, assigned to the flow,  to           d+s. Given an RSpec, (Rin, Sin), it would do so           by setting Rout = Rin and Sout = Sin - s.           Similarly,  a  network  element  using  a   WFQ           scheduler  can  decrease  its local reservation           from Rin to Rout by using some of the slack  in           the  RSpec.  This  can be accomplished by using           the transformation rules given in the  previous           section,  that ensure that the reduced reserva-           tion level will not increase the  overall  end-           to-end delay."       ::= { intSrvGuaranteedIfEntry 3 }    intSrvGuaranteedIfStatus OBJECT-TYPE        SYNTAX      RowStatus        MAX-ACCESS  read-create        STATUS      current        DESCRIPTION           "'valid' on interfaces that are configured  for           the Guaranteed Service."       ::= { intSrvGuaranteedIfEntry 4 }--      No notifications are currently defined-- conformance informationintSrvGuaranteedGroups      OBJECT IDENTIFIER                            ::= { intSrvGuaranteedConformance 1 }intSrvGuaranteedCompliances OBJECT IDENTIFIER                            ::= { intSrvGuaranteedConformance 2 }-- compliance statements    intSrvGuaranteedCompliance MODULE-COMPLIANCE        STATUS  current        DESCRIPTION           "The compliance statement "       MODULE  -- this module       MANDATORY-GROUPS {           intSrvGuaranteedIfAttribGroup           }       ::= { intSrvGuaranteedCompliances 1 }    intSrvGuaranteedIfAttribGroup OBJECT-GROUP         OBJECTS {            intSrvGuaranteedIfBacklog,            intSrvGuaranteedIfDelay,            intSrvGuaranteedIfSlack,            intSrvGuaranteedIfStatus        }        STATUS  current        DESCRIPTION           "These objects are required  for  Systems  sup-           porting the Guaranteed Service of the Integrat-           ed Services Architecture."       ::= { intSrvGuaranteedGroups 2 }END