In a FlexVPN deployment, the spokes successfully connect to the hub, but spoke-to-spoke tunnels do not form. Which troubleshooting step solves the issue?
A.
Verify the spoke configuration to check if the NHRP redirect is enabled.
B.
Verify that the spoke receives redirect messages and sends resolution requests.
C.
Verify the hub configuration to check if the NHRP shortcut is enabled.
D.
Verify that the tunnel interface is contained within a VRF.
On receiving the redirect, Spoke1 initiates a resolution request for Host2 over the point-to-point tunnel interface (the same interface over which it received the redirect). The resolution request traverses the routed path (Spoke1-hub-spoke2). On receiving the resolution request, Spoke2 determines that it is the exit point and needs to respond to the resolution request.
https://www.cisco.com/en/US/docs/ios-xml/ios/sec_conn_ike2vpn/configuration/15-2mt/sec-flex-spoke.html
The hub sends out an NHRP redirect message to spoke1 on virtual access interface1.
On receiving the redirect, Spoke1 initiates a resolution request for Host2 over the point-to-point tunnel interface (the same interface over which it received the redirect). The resolution request traverses the routed path (Spoke1-hub-spoke2). On receiving the resolution request, Spoke2 determines that it is the exit point and needs to respond to the resolution request.
https://www.cisco.com/en/US/docs/ios-xml/ios/sec_conn_ike2vpn/configuration/15-2mt/sec-flex-spoke.html#GUID-2762C965-B052-4876-8F9A-2ACCEF05BBE4
A and C can be eliminated because the HUB = Redirects and Spokes = Shortcuts Not the other way around
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