North American Network Operators Group|
Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical
Re: IP over SONET considered harmful?
Paul E. Erkkila writes: > Without going to far into the traceroute source , would > a solution to this problem be a modified traceroute that > "understood" and could report Tag/MPLS "hops" as well as > the normal method? There would need to be some way of > identifying which devices were forwarding using Tag/Mpls > and which were not, as well as getting and reporting > the information. I think it falls into the same category of > tracing cell forwarding in ATM without having access to the > equipment doing the work. Without getting into whether this is a good idea - I suspect many service providers would disable such a capability - one of the nice aspects of traceroute is that it uses the usual packet forwarding path until the last hop. In other words, it's a little hard to break the normal packet forwarding mechanism without breaking traceroute too. This charcteristic would be hard to preserve with such a solution. > Alan and I discussed the "knob" solution before, it seems > to solve the problem, but under certain circumstances a packet > could end up being forwarded forever because of (mis)configuration. You do have to make sure that tunnels always move packets closer to their destination, yes.