i am not familar with router, i really do not know how to start
without bridging, it can easy to re-route with ip route and mangle rule
The maximum packet size in IPIP Tunnel is 1480 bytes, 20 bytes are overhead
Sorry, I want to get the rate of the queue.what you mean by "grep the traffic of a queue"? actual data that is queued or rate at what data is passing through the queue?