A Proposal for Generic Traceroute Over Tunnels
We identify some issues for generic traceroute for tunnels (tunnel- trace): (1) it is possible that some IP hops do not support tunneltrace, (2) for each tunnel wishing to be traced, at least the two end points should support the tunneltrace, (3) tracing message should be able to by-pass firewalls and NATs. One possible solution, based on the CASP signaling protocol (stateless mode), is proposed to support generic routetracing over tunnels.