1. OSI Management Information
Jaringan Telekomunikasi, Sukiswo ST, MT
OSI Management Information
Sukiswo
Manajemen Jaringan, Sukiswo ST, MT

2. Manajemen Jaringan, Sukiswo ST, MT
Table of Contents
OSI SMI Overview
Management Information Model
Definition of Management Information
Guidelines for the Definition of
Managed Objects (GDMO )
Manajemen Jaringan, Sukiswo ST, MT 3

3. OSI Management Information Overview
OSI Management Information is modeled using the object-oriented approach
modularity
reuse of pieces of specification & code
extensibility
R elated standard documents are:
ISO ( X ) M a n a g e m e n t I n f o r m a t I o n Mo d el
ISO (X.721) Definition of Management Information
ISO (X.722) Guidelines for the Definition of Managed Objects (GDMO)
Manajemen Jaringan, Sukiswo ST, MT 3

4. Management Information Model (X.720)
MIM enables people to define managed objects in a standard way using object-oriented approach
MIM defines:
the information model of managed objects (MOs) and their attributes
describes the concept of managed-object class and the relationships into which they can enter, including inheritance, specialization, allomorphism, and containment
the structure of management information
the principles of naming MOs and attributes
Manajemen Jaringan, Sukiswo ST, MT 3

5. Manajemen Jaringan, Sukiswo ST, MT
Basic Concepts
A managed object (MO) is defined in terms of:
attributes it possesses
operations that may be performed upon it
notifications that it may issue
its relationships with other MOs
A managed-object class is a model or template for MO instances that share the same attributes, notifications, operations and behavior
Although the specifications are done using the OO approach, they do not dictate that implementations be done using the same approach
Manajemen Jaringan, Sukiswo ST, MT 3

6. A Managed Object is a View of a RESOURCE
Object boundary
Management Operations
Notifications
Manajemen Jaringan, Sukiswo ST, MT 3

7. Definition of Managed Objects
OUTSIDE
INSIDE
Management Dimension
Operational Dimension
operations
Resource to be managed
e.g., X.25 protocol machine
- virtual circuits
- protocol states
- error conditions
configuration
control of states
performance statistics
accounting
alarms
notifications
Manajemen Jaringan, Sukiswo ST, MT 3

8. Manajemen Jaringan, Sukiswo ST, MT
Three OSI Trees
ISO Registration Tree
a naming tree where the definitions (e.g., MO classes, attributes, actions, notifications, packages) are registered
Inheritance Tree
shows how the definition of managed object classes is derived from other object classes using inheritance
Containment Tree
shows the MOs an agent contains (MIB) and the hierarchy/containment of those objects
used not only to define the MIB structure but as a means of referencing object instances
Manajemen Jaringan, Sukiswo ST, MT 3

9. MO Class Hierarchy Example
TOP
SYSTEM
CONNECTION
LAYER ENTITY
LAYER 1
C 1
etc.
Manajemen Jaringan, Sukiswo ST, MT 3

10. Manajemen Jaringan, Sukiswo ST, MT
Attributes
Attributes are properties of managed objects that are made VISIBLE
may be OBSERVABLE and/or MODIFIABLE
may DETERMINE or REFLECT BEHAVIOR
ACCESS is constrained by the managed object
An attribute has a single value, which may have a simple or complex structure (e.g., a SET)
Within a MO class, some of the attributes may be grouped together to form a group attribute
Manajemen Jaringan, Sukiswo ST, MT 3

11. Manajemen Jaringan, Sukiswo ST, MT
Attribute Groups
Attribute groups are defined for ease of reference
applicable OPERATIONS are those that do not specify a new value
Manajemen Jaringan, Sukiswo ST, MT 3

12. Operations that Apply to Attributes
GET attribute value
REPLACE attribute value
SET to DEFAULT attribute value
ADD member to set
REMOVE member from set
Operations complete atomically
Any constraints are specified in managed object definition
Manajemen Jaringan, Sukiswo ST, MT 3

13. Operations that Apply to Managed Objects
CREATE managed object
DELETE managed object
ACTION (general category for managed object-specific operations)
may have 0, 1 or more responses
Manajemen Jaringan, Sukiswo ST, MT 3

14. Mandatory and Conditional Packages
A Package is a defined collection of
attributes
operations
notifications
behavior
which must be present or absent as a whole
Some packages are mandatory
Operations in managed object definitions are permitted only in the form of Conditional Packages
A Conditional Package is present in a managed object if and only if some defined condition holds
Manajemen Jaringan, Sukiswo ST, MT

15. Manajemen Jaringan, Sukiswo ST, MT
Containment Example
Other Managed
Objects
System MO
Transport Layer MO
Transport
Entity MO
TC MO
Manajemen Jaringan, Sukiswo ST, MT

16. Containment Example (2a)
Network subsystem MO
network
entity MO
NSAP MO
X.25 PLE
IV MO
X.25 PLE MO
CL-NS MO
CL-NS MO
PVC MO
SVC MO
SVC
IV MO
circuit MO
circuit MO
NSAP = Network service access point PVC = Permanent virtual circuit
PLE = Packet level entity SVC = Switched virtual circuit
CL-NS = Connectionless-mode network service
CO-NS= Connection-mode network service
IVMO = Initial value managed object
Manajemen Jaringan, Sukiswo ST, MT

17. Containment Example (2b)
Network
subsystem MO
Network entity MO
NSAP MO
CL-NS MO
circuit
X.25 PLE
X.25 PLE MO
PVC
SVC
IV-MO
Manajemen Jaringan, Sukiswo ST, MT

18. Attribute Value Assertions (AVA)=
Attribute ID
Attribute Value
Selects object instance within class
&
within containing object
Selects managed object class
(or group of classes)
Also termed Relative Distinguished Name (RDN) as in the X.500 Directory standards
Used for naming of managed objects in the MIB
Manajemen Jaringan, Sukiswo ST, MT 3

19. Naming Example Root System MO system-title = title
Network subsystem MO
Transport subsystem MO
nSubsystem-MO-Name
=null
tSubsystem-MO-Name
=null
X.25 PLE MO
x25PLE-MO-Name
=“xyz”
switched virtual circuit MO
virtualCall-MO-Name =6
Distinguished name of Switched virtual circuit MO is:
system-title + title, nSubsystem-MO-Name = null,
x25PLE-MO-Name = “xyz”, virtualCall-MO-Name = 6
Manajemen Jaringan, Sukiswo ST, MT

20. Definition of Management Information (X.721)
OBJECTIVE: define common management tools that can be applied to a wide variety of objects
INCLUDES:
Definition of counters, gauges, thresholds, tide-marks
Management information defined in function standards
alarm notifications
state attributes
discriminators
logs and log records
etc.
Manajemen Jaringan, Sukiswo ST, MT 3

21. Manajemen Jaringan, Sukiswo ST, MT
GDMO (X.722)
Specifies the contents and structure of managed object class definitions
properties inherited from super-classes
properties imported from DMI, functions, etc.
definition of attributes, operations and notifications in packages
association of attributes, operations and notifications with resource behavior
assignment of MO class name and attributed identifiers
definition of possible containment relationships
definition of rules for creation
set of allomorphic classes
Manajemen Jaringan, Sukiswo ST, MT 3

22. Notational Tools for Managed Object Definitions
managed object class template
package template
name binding template
attribute template
attribute group template
behavior template
action template
notification template
parameter template
Manajemen Jaringan, Sukiswo ST, MT 3

23. Manajemen Jaringan, Sukiswo ST, MT
Attribute Template
<attribute-label> ATTRIBUTE
DERIVED FROM <attribute-label> |
WITH ATTRIBUTE SYNTAX type-reference;
[MATCHES FOR qualifier [, qualifier]*;]
[BEHAVIOR <behavior-definition-label>
[, <behavior-definition-label>]* ;]
[PARAMETER <parameter-label>
[, <parameter-label> ]* ;]
[REGISTERED AS object-identifier; ]
Manajemen Jaringan, Sukiswo ST, MT 3

24. N otification Template
< notification-label > NOTIFICATION
[BEHAVIOR < behavior-definition-label >
[, < behavior-definition-label > ] * ;]
[PARAMETER < parameter-label >
[, < parameter-label > ] * ;]
[ W ITH INFORMATION S Y NTA X type-reference
[AN D ATTRIBUTE I D S < field-name > < attribute-label > [, < field-name > < attribute-label > ] * ;]
[ W ITH REPLY S Y NTA X type-reference; ]
REGISTERE D AS object-identifier;
Manajemen Jaringan, Sukiswo ST, MT 3

25. Manajemen Jaringan, Sukiswo ST, MT
MO Class Template
< class-label > MANAGE D OB J ECT CLASS
[D ERIVE D FROM < class-label > [, < class-label > ]* ;]
[CHARACTERI Z E D B Y < package-label >
[, < package-label >]* ;]
[CONDITIONAL PACKAGES <package-label>
PRESENT IF condition-definition
[, <package-label>
PRESENT IF condition-definition]* ;]
REGISTERED AS object-identifier;
Manajemen Jaringan, Sukiswo ST, MT 3

26. Manajemen Jaringan, Sukiswo ST, MT
DAMOCLES
OSI Managed Object Definition Tool
GDMO Template Editor and Parser
GDMO Schema Browser
simplifies the task of defining MO definitions
maintains schema libraries
provides a structured overview of existing models
imports and checks externally developed models
can save and pretty-print developed models
runs on Solaris 2.x, HP-UX 9.x and Linux 1.2
Manajemen Jaringan, Sukiswo ST, MT 3

27. DAMOCLES - GDMO Template Editor
Manajemen Jaringan, Sukiswo ST, MT 3

28. DAMOCLES - Inheritance Tree Browser
Manajemen Jaringan, Sukiswo ST, MT 3

29. DAMOCLES - Containment Schema Browser
Manajemen Jaringan, Sukiswo ST, MT 3

30. DAMOCLES - Class Browser
Manajemen Jaringan, Sukiswo ST, MT 3

31. Manajemen Jaringan, Sukiswo ST, MT
DAMOCLES - Online Help
Manajemen Jaringan, Sukiswo ST, MT 3

32. Manajemen Jaringan, Sukiswo ST, MT
References
William Stallings, SNMP, SNMPv2, and CMIP, Addison-Wesley, ISBN , 1993.
Manajemen Jaringan, Sukiswo ST, MT 3