Exam 300-730 topic 1 question 109 discussion

"D", is the correct answer here. Configuring the dynamic NHRP multicast map on the hub tunnel interface is a solution that can potentially resolve the issue of a DMVPN spoke router being unable to establish an EIGRP neighbor relationship with the hub router. In DMVPN (Dynamic Multipoint VPN) environments, when using protocols like EIGRP over the tunnel, it's essential to ensure proper handling of multicast traffic, which is used for routing protocol neighbor discovery. The dynamic NHRP multicast map helps in this context by dynamically mapping multicast groups to the NBMA (Non-Broadcast Multiple Access) addresses of the spokes. To configure the dynamic NHRP multicast map on the hub tunnel interface, you can use a command like: interface Tunnel0 ip nhrp map multicast dynamic This command tells the hub router to dynamically map multicast groups for NHRP, enabling proper handling of EIGRP multicast traffic between spokes and the hub. Therefore, configuring the dynamic NHRP multicast map on the hub tunnel interface is a valid solution to address the issue of EIGRP neighbor relationship establishment in a DMVPN setup.

D is the correct answer

Answer is D https://www.cisco.com/c/en/us/support/docs/security/dynamic-multipoint-vpn-dmvpn/111976-dmvpn-troubleshoot-00.html

DDDDDDDDDDDDD all the way baby

poor question by cisco

DMVPN is an NBMA network, which doesn’t support multicast at all. The only reason we can get it working to the hub is because of the nhrp multicast command we add to the tunnel interface.