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MLFR Link Integrity Protocol

Member links in an MLFR bundle support the MLFR Link Integrity Protocol (LIP). LIP offers several types of messages, which allow member links to join and leave a bundle. See Table 10.

Table 10: LIP Messages and Functions

LIP Message	Function
Add-Link	Member link sends this message to request to join a bundle.
Add-Link-Ack	Member link sends this message when it receives an Add-Link message.
Add-Link-Rej	Member link sends this message to reject a request to join a bundle.
Hello	Member link sends this message to check the status of another member.
Hello-Ack	Member link sends this message when it receives a Hello message.
Remove-Link	Member link sends this message to request to leave a bundle.
Remove-Link-Ack	Member link sends this message when it receives a Remove-Link message.

The DTE creates a link management interface (LMI) with the network by encapsulating the Frame Relay frame within an MLFR frame. You assign one or more data link control identifiers (DLCIs) to a bundle.

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