-- extracted from rfc2214.txt
-- at Mon Nov 15 17:11:45 1999
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" -- Nov 3, 1995 5:00:00 AM
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"
-- 1.3.6.1.2.1.52.5 -- ::= { intSrv 5 }
intSrvGuaranteedObjects OBJECT IDENTIFIER
-- 1.3.6.1.2.1.52.5.1 -- ::= { intSrvGuaranteed 1 }
intSrvGuaranteedNotifications OBJECT IDENTIFIER
-- 1.3.6.1.2.1.52.5.2 -- ::= { intSrvGuaranteed 2 }
intSrvGuaranteedConformance OBJECT IDENTIFIER
-- 1.3.6.1.2.1.52.5.3 -- ::= { 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."
-- 1.3.6.1.2.1.52.5.1.1 -- ::= { intSrvGuaranteedObjects 1 }
intSrvGuaranteedIfEntry OBJECT-TYPE
SYNTAX IntSrvGuaranteedIfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The reservable attributes of a given inter-
face."
INDEX {
ifIndex }
-- 1.3.6.1.2.1.52.5.1.1.1 -- ::= { intSrvGuaranteedIfTable 1 }
IntSrvGuaranteedIfEntry ::= SEQUENCE {
intSrvGuaranteedIfBacklog INTEGER,
intSrvGuaranteedIfDelay INTEGER,
intSrvGuaranteedIfSlack INTEGER,
intSrvGuaranteedIfStatus RowStatus }
intSrvGuaranteedIfBacklog OBJECT-TYPE
SYNTAX INTEGER (0..268435455)
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."
-- 1.3.6.1.2.1.52.5.1.1.1.1 -- ::= { intSrvGuaranteedIfEntry 1 }
intSrvGuaranteedIfDelay OBJECT-TYPE
SYNTAX INTEGER (0..268435455)
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."
-- 1.3.6.1.2.1.52.5.1.1.1.2 -- ::= { intSrvGuaranteedIfEntry 2 }
intSrvGuaranteedIfSlack OBJECT-TYPE
SYNTAX INTEGER (0..268435455)
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."
-- 1.3.6.1.2.1.52.5.1.1.1.3 -- ::= { intSrvGuaranteedIfEntry 3 }
intSrvGuaranteedIfStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"'valid' on interfaces that are configured for
the Guaranteed Service."
-- 1.3.6.1.2.1.52.5.1.1.1.4 -- ::= { intSrvGuaranteedIfEntry 4 }
-- No notifications are currently defined
-- conformance information
intSrvGuaranteedGroups OBJECT IDENTIFIER
-- 1.3.6.1.2.1.52.5.3.1 -- ::= { intSrvGuaranteedConformance 1 }
intSrvGuaranteedCompliances OBJECT IDENTIFIER
-- 1.3.6.1.2.1.52.5.3.2 -- ::= { intSrvGuaranteedConformance 2 }
-- compliance statements
intSrvGuaranteedCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement"
MODULE
MANDATORY-GROUPS {
intSrvGuaranteedIfAttribGroup }
-- 1.3.6.1.2.1.52.5.3.2.1 -- ::= { 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."
-- 1.3.6.1.2.1.52.5.3.1.2 -- ::= { intSrvGuaranteedGroups 2 }
END