INT-SERV-GUARANTEED-MIB

File: INT-SERV-GUARANTEED-MIB.mib (8680 bytes)

Imported modules

SNMPv2-SMI SNMPv2-TC SNMPv2-CONF
INT-SERV-MIB IF-MIB

Imported symbols

MODULE-IDENTITY OBJECT-TYPE RowStatus
MODULE-COMPLIANCE OBJECT-GROUP intSrv
ifIndex

Defined Types

IntSrvGuaranteedIfEntry  
SEQUENCE    
  intSrvGuaranteedIfC INTEGER
  intSrvGuaranteedIfD INTEGER
  intSrvGuaranteedIfSlack INTEGER
  intSrvGuaranteedIfStatus RowStatus

Defined Values

intSrvGuaranteed 1.3.6.1.2.1.52.4
The MIB module to describe the Guaranteed Service of the Integrated Services Protocol
MODULE-IDENTITY    

intSrvGuaranteedObjects 1.3.6.1.2.1.52.4.1
OBJECT IDENTIFIER    

intSrvGuaranteedNotifications 1.3.6.1.2.1.52.4.2
OBJECT IDENTIFIER    

intSrvGuaranteedConformance 1.3.6.1.2.1.52.4.3
OBJECT IDENTIFIER    

intSrvGuaranteedIfTable 1.3.6.1.2.1.52.4.1.1
The attributes of the system's interfaces ex- ported by the Guaranteed Service.
OBJECT-TYPE    
  SEQUENCE OF  
    IntSrvGuaranteedIfEntry

intSrvGuaranteedIfEntry 1.3.6.1.2.1.52.4.1.1.1
The reservable attributes of a given inter- face.
OBJECT-TYPE    
  IntSrvGuaranteedIfEntry  

intSrvGuaranteedIfC 1.3.6.1.2.1.52.4.1.1.1.1
The parameter C is the data backlog resulting from the vagaries of how a specific implementa- tion deviates from a strict bit-by-bit service. So, for instance, for packetized weighted fair queueing, C is set to the Maximum Packet Size. The error term C is measured in units of bytes. An individual element can advertise a C value between 1 and 2**28 (a little over 250 mega- bytes) and the total added over 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 error term should be (2**32)-1.
OBJECT-TYPE    
  INTEGER 0..0FFFFFFF  

intSrvGuaranteedIfD 1.3.6.1.2.1.52.4.1.1.1.2
The parameter D at each service element should be set to the maximum packet transfer delay (independent of bucket size) through the ser- vice 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 error term D is measured in units of one microsecond. An individual element can adver- tise a delay value between 1 and 2**28 (some- what over two minutes) and the total delay ad- ded 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.
OBJECT-TYPE    
  INTEGER 0..0FFFFFFF  

intSrvGuaranteedIfSlack 1.3.6.1.2.1.52.4.1.1.1.3
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. The latter is ob- tained by setting R=r in the fluid delay formu- la, 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.
OBJECT-TYPE    
  INTEGER 0..0FFFFFFF  

intSrvGuaranteedIfStatus 1.3.6.1.2.1.52.4.1.1.1.4
'valid' on interfaces that are configured for the Guaranteed Service.
OBJECT-TYPE    
  RowStatus  

intSrvGuaranteedGroups 1.3.6.1.2.1.52.4.3.1
OBJECT IDENTIFIER    

intSrvGuaranteedCompliances 1.3.6.1.2.1.52.4.3.2
OBJECT IDENTIFIER    

intSrvGuaranteedCompliance 1.3.6.1.2.1.52.4.3.2.1
The compliance statement
MODULE-COMPLIANCE    

intSrvGuaranteedIfAttribGroup 1.3.6.1.2.1.52.4.3.1.2
These objects are required for Systems sup- porting the Guaranteed Service of the Integrat- ed Services Architecture.
OBJECT-GROUP