Local Management Interface
Encyclopedia
Local Management Interface (LMI) is a signaling standard used between routers and frame relay
switches. Communication takes place between a router and the first frame relay switch it's connected to. 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: ANSI's T1.617 Annex D standard; ITU-T's Q.933 Annex A standard; and the "Gang of Four" standard, named for the four companies that developed it: Cisco, DEC, StrataCom and NorTel (Northern Telecom).
The "Gang of Four" LMI standard uses DLCI 1023. The T1.617 Annex D and Q.933 Annex A standards use DLCI 0.
Frame relay
Frame Relay is a standardized wide area network technology that specifies the physical and logical link layers of digital telecommunications channels using a packet switching methodology...
switches. Communication takes place between a router and the first frame relay switch it's connected to. Information about keepalive
Keepalive
A keepalive is a message sent by one device to another to check that the link between the two is operating, or to prevent this link from being broken.-Description:...
s, global addressing, IP Multicast
IP Multicast
IP multicast is a method of sending Internet Protocol datagrams to a group of interested receivers in a single transmission. It is often employed for streaming media applications on the Internet and private networks. The method is the IP-specific version of the general concept of multicast...
and the status of virtual circuits is commonly exchanged using LMI.
There are three standards for LMI: ANSI's T1.617 Annex D standard; ITU-T's Q.933 Annex A standard; and the "Gang of Four" standard, named for the four companies that developed it: Cisco, DEC, StrataCom and NorTel (Northern Telecom).
The "Gang of Four" LMI standard uses DLCI 1023. The T1.617 Annex D and Q.933 Annex A standards use DLCI 0.