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A network administrator added a new spoke site with dynamic IP on the DMVPN network. Which configuration command passes traffic on the DMVPN tunnel from the spoke router?
Correct Answer: D
Non-Unique Registrations If you're experiencing DMVPN downtime due to changing public IP addresses of your DMVPN spokes, apply the ip nhrp registration non-unique interface configuration command to the DMVPN tunnel interface. This command will reduce the recovery time to less than a minute. Faster recovery is harder to achieve as the router has to execute a number of steps following a physical interface flap: Install new static routes to the hub sites; Create IPSec session with the hub sites; Register new public IP address with NHRP; Establish routing adjacency. You can fine-tune steps 1-3 on the spoke router; step 4 sometime requires coordinated changes throughout the network.