Frame Relay Local Management Interface (LMI)

The Frame Relay has many various kinds of interface to monitor it and handle the situations. The management interface will be the further extension of the protocols which are included within the Frame Relay. These extensions help us to monitor the status of the Frame Relay network and keeping the future in the mind these protocols are set for increasing the capabilities of the systems. Local management interface is concerned using the transfer of information and keeping the router intact using the network so that the data can be sent and received. The Local Management Interface extensions also permit DLCI values to be given the global importance and could be used for information transfer by using these figures.

You will find two main businesses that have developed the local management interface standards that are followed all more than the world. They are ANSI and the ITU-T. A Cisco router interface that’s using the Frame Relay encapsulation will automatically sense the kind of LMI and will run according to it. Sometimes it’s also feasible that you might have to set the interface manually.
The following are the LMI kinds supported on the Frame Relay interface:

  • Cisco. This really is the “Group of Four” LMI kind, and is the default used on Frame Relay interfaces prior to IOS version 11.2. It utilizes DLCI 1023 to exchange status info.
  • ANSI. This is the LMI type defined by ANSI. It uses DLCI 0 to exchange status information.
  • Q.933a. this is the LMI kind defined by the ITU-T. It utilizes DLCI 0 to exchange status information.

It is extremely essential that the working router and its nearby Frame Relay switch should have the similar type of nearby management interface to create the diagnostic messages in between them. Otherwise this would produce issues and also make the network disable.

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