Dynamic Address Mapping

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If you use dynamic address mapping, Frame Relay Inverse ARP dynamically associates a given DLCI with the next-hop protocol addresses for that connection. The router then updates its mapping table and uses the information in the table to route outgoing traffic to the appropriate PVC. Frame Relay Inverse ARP, and therefore dynamic addressing, is enabled by default for all protocols that are enabled on a physical interface. No additional commands are necessary.

If Inverse ARP has been previously disabled on a Frame Relay interface, it can be reenabled using the frame-relay inverse-arp command in interface configuration mode.

Note LMI must be functioning on an interface to use Frame Relay Inverse ARP because LMI is used to determine the PVCs to map.

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