Editing Common Management Information Protocol

{{Use American English|date = March 2019}}
{{Short description|Computer network management protocol}}
{{Use mdy dates|date = March 2019}}

The '''Common Management Information Protocol''' ('''CMIP''') is the OSI specified [[network management]] protocol.

Defined in [http://www.itu.int/rec/T-REC-X.711/en/ ITU-T Recommendation X.711, ISO/IEC International Standard 9596-1].  It provides an implementation for the services defined by the [[Common Management Information Service]] (CMIS) specified in [http://www.itu.int/rec/T-REC-X.710/en/ ITU-T Recommendation X.710, ISO/IEC International Standard 9595], allowing communication between network management applications and management agents. CMIS/CMIP is the [[network management]] protocol specified by the [[International Organization for Standardization|ISO]]/[[Open Systems Interconnection|OSI]] [[Network management model]] and is further defined by the [[ITU-T]] in the '''X.700''' series of recommendations.

CMIP models management information in terms of [[managed object]]s and allows both modification and performing actions on managed objects. Managed objects are described using [[GDMO]] (Guidelines for the Definition of Managed Objects), and can be identified by a distinguished name (DN), from the [[X.500]] directory.

CMIP also provides good security (support authorization, access control, and security logs) and flexible reporting of unusual network conditions.

== Services implemented ==
The management functionality implemented by CMIP is described under [[Common Management Information Service#Services|CMIS services]].

In a typical [[Telecommunications Management Network]], a [[management system]] will make use of the [[Common Management Information Service#Management_operation_services|management operation services]] to monitor [[network element]]s. [[Management agent]]s found on network elements will make use of the [[Common Management Information Service#Management_notification_services|management notification services]] to send notifications or alarms to the network management system.

== Deployment ==
CMIP is implemented in association with the [[Association Control Service Element|ACSE]] and [[Remote Operations Service Element protocol|ROSE]] protocols. Both are Layer 7 [[OSI protocols]] (Application Layer). ACSE is used to manage associations between management applications (i.e. manage connections between CMIP agents). [[Remote Operations Service Element protocol|ROSE]] is employed for all data exchange interactions. Besides the presence of these Layer 7 protocols, CMIP assumes the presence of all OSI layers at lower levels but does not explicitly specify what these should be.

There have been some attempts to adapt CMIP to the [[Internet protocol suite|TCP/IP]] protocol stack. Most notable is CMOT contained in RFC 1189 (detailing CMIP over TCP). Other possibilities include RFC 1006 (which provides an ISO transport service on top of [[Transmission Control Protocol|TCP]]), and CMIP over [[Lightweight Presentation Protocol|LPP]] (a presentation layer protocol that can run on top of [[Transmission Control Protocol|TCP]] or [[User Datagram Protocol|UDP]]).

There is also a form of [[Common management information service|CMIS]] that is developed to operate directly on top of the [[Logical Link Control|LLC]] sublayer. It is called the [[LAN/MAN Management Protocol|LAN/MAN Management Protocol (LMMP)]], formerly it was the ''Common Management Information Services and Protocol over IEEE 802 Logical Link Control (CMOL)''. This protocol does away with the need for the OSI stack as is the case with CMIP.

== History ==
CMIP was designed in competition with [[Simple Network Management Protocol|SNMP]], and has far more features than SNMP. For example, SNMP defines only "set" actions to alter the state of the managed device, while CMIP allows the definition of any type of action.  CMIP was a key part of the [[Telecommunications Management Network]], and enabled cross-organizational as well as cross-vendor network management. On the Internet, however, most [[TCP/IP]] devices support SNMP and not CMIP. This is because of the complexity and resource requirements of CMIP agents and management systems. CMIP is supported mainly by telecommunication devices.

==See also==
*[[Common Management Information Service]] (CMIS)
*CMIP over [[TCP/IP]] (CMOT)

==References==
*CMIP is formally defined by the [[X.700]] series of recommendations from the [[ITU-T]] (in particular X.711), and ISO 9596. Some description is also provided in RFC 1095 and RFC 1189 (The Common Management Information Services and Protocols for the Internet).
* [http://www.itu.int/rec/T-REC-X/en List of ITU X-series recommendations]
* {{cite book | first=Uyless | last=Black | editor=Aaron Bittner | year=1995 | title=Network Management Standards: SNMP, CMIP, TMN, MIBs, and Object Libraries | publisher=McGraw-Hill, Inc. | location=New York | isbn=0-07-005570-X }}<!--| accessdate=2007-10-17 -->
* {{cite book | first=Allan | last=Leinwand |author2=Conroy, Karen Fang | editor=Thomas Stone | year=1996 | title=Network Management: A Practical Perspective | publisher=Addison Wesley Longman, Inc. | location=Massachusetts | isbn=978-0-201-60999-8 }}<!--| accessdate=2007-10-17 -->

[[Category:ITU-T recommendations]]
[[Category:Network management]]
[[Category:OSI protocols]]