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Inverse Address Resolution Protocol

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(networking, protocol)Inverse Address Resolution Protocol - (InARP) Additions to ARP typically used for Frame Relay. Frame Relay stations route frames of a higher level protocol between LANs, across a Permanent Virtual Circuit. These stations are identified by their Data Link Control Identifier (DLCI), equivalent to an Ethernet address in a LAN itself.

InARP allows a station to determine a protocol address (e.g. IP address) from a DLCI. This is useful if a new virtual circuit becomes available. Signalling messages announce its DLCI, but without the corresponding protocol address it is unusable: no frames can be routed to it.

Reverse ARP (RARP) performs a similar task on an Ethernet LAN, however RARP answers the question "What is my IP Address?" whereas InARP answers the question "What is your protocol address?".

See RFC 2390.


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Local Management Interface (LMI): The facilities provided by the link management facilities of the LMI extensions to the Frame Relay specification - implementation of global addressing with LMI - use of the Inverse Address Resolution Protocol (InARP) in conjunction with global addressing - LMI multicasting - function of the fields in an LMI frame.
 
 
 
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