Which two statements are true about DMVPN Phase 3? (Choose two.)
- Spokes cannot learn routes from other spokes
- mGRE interfaces are not supported
- All traffic must pass through the hub router
- NHRP redirect messages enable direct spoke-to-spoke communication
- Spoke-to-spoke tunnels require hub intervention for initial setup
Explanation: According to the sources, DMVPN Phase 3 enhances spoke-to-spoke connectivity by using NHRP redirect messages. When a spoke attempts to communicate with another spoke, the hub sends an NHRP redirect message to the originator, providing the information needed to resolve the destination and establish a direct path . Furthermore, spoke-to-spoke tunnels require hub intervention for their initial setup because the originating spoke must first query the hub, which acts as the NHRP server, to map the internal tunnel address of the target to its physical NBMA address . Once the hub resolves this mapping and responds, the dynamic tunnel is triggered and built directly between the spokes .
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