Compare and contrast the following terms: DLCI, LMI, and Inverse ARP.

Compare and contrast the following terms: DLCI, LMI, and Inverse ARP.

DLCI: Data Link Connection Identifier

• VCs are identified by DLCIs, and the DLCI values are assigned by the Frame Relay service provider.
• Frame Relay DLCIs have local significance and no significance beyond the single link.
• A DLCI identifies a VC to the equipment at an endpoint.

LMI: Local Management Interface

• LMI is a keepalive mechanism that provides status information about Frame Relay connections between the router (DTE) and the Frame Relay switch (DCE).
• Cisco routers support three types of LMIs: Cisco, ANSI, and q933a.

Inverse ARP

• Inverse Address Resolution Protocol (ARP) obtains Layer 3 addresses of other stations from Layer 2 addresses, such as the DLCI in Frame Relay networks (which is the reverse of what ARP does).
• It is primarily used in Frame Relay and ATM networks, where Layer 2 addresses of VCs are sometimes obtained from Layer 2 signaling, and the corresponding Layer 3 addresses must be available before these VCs can be used.

Exam with this question: EWAN v4 Chapter 3 Check Your Understanding: Frame Relay