In a FlexVPN deployment, the spokes are successfully connecting to the hub. However, spoke-to-spoke tunnels do not perform. Which troubleshooting steps is valid for this issue?
A. Verify the tunnel interface is contained within a VFR
B. Verify the hub configuration to check if the NHRP shortcut is enabled
C. Verify the spoke receives redirect messages and send resolution requests
D. Verify the spoke configuration to check if the NHRP redirect is enabled
C is the correct answer
DMVPN phase 2 does not need redirect or shorcuts
DMVPN phase 3, you must have redirect in the HUB and shortcut in the spokes
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_conn_dmvpn/configuration/15-mt/sec-conn-dmvpn-15-mt-book/sec-conn-dmvpn-summ-maps.pdf