|Exam 200-125||Question id=260||WAN Technologies|
Which circumstances can cause a GRE tunnel to be in an up/down state?
The tunnel interface IP address is misconfigured.|
The tunnel interface is down.|
A valid route to the destination address is missing from the routing table.|
The tunnel address is routed through the tunnel itself.|
The ISP is blocking the traffic.|
An ACL is blocking the outbound traffic.|