On Mon, Jan 23, 2017 at 05:58:20PM +0900, Ryota Ozaki wrote: > > The demerit is that that mechanism adds non-trivial > overhead; RTT of ping increases by 30 usec.
I don't see why overhead for control protocols like ICMP matters. I think if you look at longstanding commercial designs for networking equipment -- software and hardware alike -- for literally decades they have taken the approach of optimizing the fast path (forwarding, data protocol performance) while allowing the exception/error paths (ICMP etc.) to be very slow. Thor
