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- Newsgroups: comp.protocols.iso
- Path: sparky!uunet!mcsun!sunic!aun.uninett.no!nuug!ifi.uio.no!jon
- From: "Jon \\lnes" <jon@ifi.uio.no>
- Subject: Re: What is Q3?
- In-Reply-To: ketil@edb.tih.no (Ketil Albertsen,TIH)'s message of Tue, 26 Jan
- 1993 07:58:43 GMT
- Message-ID: <CMM.0.90.2.728041349.jon@gode.ifi.uio.no>
- Sender: jon@ifi.uio.no (Jon \lnes)
- Organization: Dept. of Informatics, University of Oslo, Norway
- References: <C1ED3n.7yv@hpwin052.uksr.hp.com>
- <1993Jan26.075848.28882W@lumina.edb.tih.no>
- Date: Tue, 26 Jan 1993 09:42:29 GMT
- Lines: 66
- Originator: jon@gode.ifi.uio.no
-
- In article <1993Jan26.075848.28882W@lumina.edb.tih.no> ketil@edb.tih.no (Ketil Albertsen,TIH) writes:
-
- > In article <C1ED3n.7yv@hpwin052.uksr.hp.com>, danielh@hpber199.swiss.hp.com
- > (Daniel Huber) writes:
- >
- > >As I know, Q3 is a CCITT standart for network management of
- > >telecommunications environments.
- > >
- > >Is there somwhere more info to find about this topic? Is there an RFC?
- > >Is Q3 somehow related to CMIP or CMOT?
- >
- > I suspect that the Q3 you are referring to is the *reference point* Q3, it
- > is not a standard itself, but defined by Q.941 or thereabouts (Q.94?).
- > There is also a Q1 and Q2 reference point. There is no connection between
- > the Q in Q3 and the Q in Q.941, that is purely coincidal. (The I series
- > recommendations define similar R, S and T reference points.)
- >
- > I do not have Q.941 available right now, but as far as I remember, Q3
- > defines the lowest level functionality between a switch and an "MD" (Mediation
- > Device, something like a concentrator), on the way to the management system,
- > while Q1 is the functionality available at the user level system management.
- >
- > If you are not accustomed to reading CCITT recommendations, Q.94? is
- > NOT the place to start!
-
- Wrong, although not entirely wrong. The base document to ce
- is CCITT's TMN (Telecommunications Management Network) architecture,
- described in the M.3010 document (formerly M.30). Roughly speaking, this
- builds a management architecture on top of ISO's network management
- standards. The TMN architecture consists of several functional elements:
- NEF (Network Element Function): Functions related to management of pieces
- of telecommunications equipment, with a standardized management interface.
- QAF (Q-Adapter Function): A functional block to integrate equipment with
- non-standard management interfaces, like a proxy-agent in SNMP.
- MF (Mediation Function): Adapts, filters and condenses information from
- NEFs/QAFs before further processing by the management system.
- OSF (Operations Systems Function): Runs the management applications.
- WSF (WorkStation Function): Runs the user interface.
-
- Between the different functional blocks, reference points are defined:
- 'g' from a WSF to a user, 'f' from a WSF and some other functional block
- (usually an OSF), 'q3' between OSFs and from an OSF to MF/NEF/QAF (the
- MF is optional, allowing direct interactions from NEF/QAF to MF), 'qx'
- between NEF/QAF and MF or between MFs.
- If two functional blocks are realized within one piece of equipment, the
- reference point between them is an internal interface, and its implementation
- is not standardized. If the blocks are in different pieces of equipment,
- the reference point must be realized as a standardized communication inter-
- face, denoted by a capitalization of the letter, e.g. 'Q3'.
-
- The Q3 interface is described somewhere. I don't have the reference at hand,
- but the one given above may be correct. It consists of a protocol part,
- basically CMIS/CMIP, but sometimes FTAM may be included as well (other
- protocols for further study), and an information part, i.e. the Shared
- Management Knowledge (SMK) between the two sides of the interface - know-
- ledge about manged object classes and managed object instances. Some propose
- to add a security part, or more generally a quality of service part, to the
- interface specification as well.
- As can be read form this, there isn't _one_ Q3 interface. All Q3 interfaces
- will differ in their SMK, possibly also in choice of protocols. In all cases,
- communication across the interface is standardized, however.
-
- Well, TMN is a bit more complicated than this - enough for now!
-
- Jon Olnes, Norwegian Computing Centre, Oslo, Norway
- E-mail: Jon.Olnes@nr.no or jon@ifi.uio.no
-