Local Management Interface (LMI) is a term for some signaling standards used in networks, namely

Frame Relay Frame Relay is a standardized wide area network (WAN) technology that specifies the physical and data link layers of digital telecommunications channels using a packet switching methodology. Originally designed for transport across Integrated Se ...

and

Carrier Ethernet Carrier Ethernet is a marketing term for extensions to Ethernet for communications service providers that utilize Ethernet technology in their networks. Background Ethernet has a long history. It has become dominant in enterprise networks. This d ...

Frame Relay

LMI is a set of signalling standards between routers and Frame Relay switches. Communication takes place between a router and the first Frame Relay switch to which it is connected. Information about

keepalive A keepalive (KA) is a message sent by one device to another to check that the link between the two is operating, or to prevent the link from being broken. Description Once a TCP connection has been established, that connection is defined to be v ...

s, global addressing,

IP multicast IP multicast is a method of sending Internet Protocol (IP) datagrams to a group of interested receivers in a single transmission. It is the IP-specific form of multicast and is used for streaming media and other network applications. It uses speci ...

and the status of virtual circuits is commonly exchanged using LMI. There are three standards for LMI: * Using

DLCI A data link connection identifier (DLCI) is a Frame Relay 10-bit-wide link-local virtual circuit identifier used to assign frames to a specific Virtual circuit#Permanent and switched virtual circuits in ATM.2C frame relay.2C and X.25, PVC or Virtua ...

0: ** 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 Cisco Systems, Inc., commonly known as Cisco, is an American-based multinational digital communications technology conglomerate corporation headquartered in San Jose, California. Cisco develops, manufactures, and sells networking hardware, ...

, DEC,

StrataCom StrataCom, Inc. was a supplier of Asynchronous Transfer Mode (ATM) and Frame Relay high-speed wide area network (WAN) switching equipment. StrataCom was founded in Cupertino, California, United States, in January 1986, by 26 former employees of t ...

and

Nortel Nortel Networks Corporation (Nortel), formerly Northern Telecom Limited, was a Canadian multinational telecommunications and data networking equipment manufacturer headquartered in Ottawa, Ontario, Canada. It was founded in Montreal, Quebec, ...

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, founded in 2001, is a nonprofit international industry consortium, of network, cloud, and technology providers. MEF, originally known as the Metro Ethernet Forum, was dedicated to Carrier Ethernet networks and services, and in recent years, si ...

(MEF) for Carrier Ethernet networks. It provides information that enables auto configuration of customer edge (CE) devices.

References

External links

Additional information on Frame Relay LMI
Computer networking Frame Relay {{compu-network-stub