# Local Management Interface

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

## Frame Relay

LMI is a set of signalling standards between [routers](/source/Router_(computing)) and Frame Relay switches. Communication takes place between a router and the first Frame Relay switch to which it is connected. Information about [keepalives](/source/Keepalive), global addressing, [IP multicast](/source/IP_multicast) and the status of [virtual circuits](/source/Virtual_circuits) is commonly exchanged using LMI.

There are three standards for LMI:

- Using [DLCI](/source/Data_link_connection_identifier) 0:[1] - 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](/source/Cisco), [DEC](/source/Digital_Equipment_Corporation), [StrataCom](/source/StrataCom) and [Nortel](/source/Nortel)[1]

## Carrier Ethernet

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

## References

1. Odom, Wendell (2008). [*CCNA ICND2*](https://archive.org/details/isbn_9781587201813/page/467). [Indianapolis](/source/Indianapolis,_Indiana): Cisco Press. p. [467](https://archive.org/details/isbn_9781587201813/page/467). ISBN 978-1-58720-181-3.

## External links

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

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Adapted from the Wikipedia article [Local Management Interface](https://en.wikipedia.org/wiki/Local_Management_Interface) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Local_Management_Interface?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.