Local Management Interface: Difference between revisions

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'''Local Management Interface (LMI)''' is a term for some signaling standards used in networks, namely [[Frame Relay]] and [[Carrier Ethernet]].

*[[== Frame Relay]] ==

LMI is a set of signalling standards between [[Router (computing)|router]]s and Frame Relay switches. Communication takes place between a router and the first Frame Relay switch to which it is connected. Information about [[keepalive]]s, global addressing, [[IP multicast]] and the status of [[virtual circuits]] is commonly exchanged using LMI.

There are three standards for LMI:

* Using [[Data link connection identifier|DLCI]] 0:<ref name ="Odom" />

** ANSI's T1.617 Annex D standard

** ITU-T's Q.933 Annex A standard

* Using DLCI 1023:

** The "Gang of Four" standard, developed by [[Cisco]], [[Digital Equipment Corporation|DEC]], [[StrataCom]] and [[Nortel]]<ref name="Odom">{{cite book |title=CCNA ICND2 |last=Odom |first=Wendell |year=2008 |publisher=Cisco Press |___location=[[Indianapolis, Indiana|Indianapolis]] |isbn=978-1-58720-181-3 |url=https://archive.org/details/isbn_9781587201813/page/467 |page=[https://archive.org/details/isbn_9781587201813/page/467 467] |url-access=registration }}</ref>

== Carrier Ethernet ==

Ethernet Local Management Interface (E-LMI) is an Ethernet layer operation, administration, and management (OAM) protocol defined by the [[Metro Ethernet Forum]] (MEF) for Carrier Ethernet networks. It provides information that enables auto configuration of customer edge (CE) devices.

== References ==

<references />

==External links==

*[https://web.archive.org/web/20160401071013/http://communitystring.com/2009/10/frame-relay-lmi/ Additional information on Frame Relay LMI]

[[Category:Computer networking]]

[[Category:Frame Relay]]

Software enhancements to frame relay specifications, providing the ability to integrate with a keep alive mechanism (verifying that [[DLCI]]'s work), multicast mechanism (gives the network server its DLCI), Multicast DLCI, global addressing, and status mechanism. SMI data rids within the customer data pirt of the frame rela frame. More advanced LMI applications are called Consolidated Link Layer Management [[(CLLM)]] - which adds the ability to report congestion control for individual DLCI's

{{compu-network-stub}}

== See Also ==

*[[Frame Relay]]