A GRE tunnel is down with the error message %TUN-5-RECUR DOWN:

Which two options describe possible causes of the error? (Choose two)
Correct Answer: D,E
Explanation
The %TUN-5-RECURDOWN: Tunnel0 temporarily disabled due to recursive routing error message means that the generic routing encapsulation (GRE) tunnel router has discovered a recursive routing problem. This condition is usually due to one of these causes:
+ A misconfiguration that causes the router to try to route to the tunnel destination address using the tunnel interface itself (recursive routing)
+ A temporary instability caused by route flapping elsewhere in the network Reference: https://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routingprotocol- eigrp/22327-gre-flap.html