Explain the nat overlap-address command on the AR router

The nat overlap-address command configures the mapping between an overlapping address pool and a temporary address pool. When IP addresses of internal and external hosts overlap, the mapping between the overlapping address pool and the temporary address pool needs to be configured. After the mapping is configured, the overlapping address is translated into a unique temporary address to ensure correct packet forwarding. Outbound NAT needs to be configured to implement bidirectional NAT.

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