JN0-349 · Question #3
Which statement is true about IP-IP tunnels?
The correct answer is B. Intermediate devices must have a route to both the tunnel source address and the tunnel. Routing is based on destination, not source; Only the route for the destination tunnel endpoint is necessary for each packet. If you're thinking about a lab environment with a single intermediary device, it's incidental that it will have a route for both tunnel endpoint IPs…
Question
Which statement is true about IP-IP tunnels?
Options
- AIntermediate devices must have a route to the destination address of the traffic being tunneled.
- BIntermediate devices must have a route to both the tunnel source address and the tunnel
- CIntermediate devices must have a route to the tunnel destination address but do not require a
- DIntermediate devices must have a route to the tunnel source address but do not require a route to
How the community answered
(44 responses)- A5% (2)
- B73% (32)
- C16% (7)
- D7% (3)
Explanation
Routing is based on destination, not source; Only the route for the destination tunnel endpoint is necessary for each packet. If you're thinking about a lab environment with a single intermediary device, it's incidental that it will have a route for both tunnel endpoint IPs. Only the relevant destination will be considered with each packet it processes.
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