On 9/16/11 11:42 , Steve Bohrer wrote: > My general question is "what meaning do I give to lossy traceroutes, > even when pings show no problem." > > Can I expect that backbone routers should never give me timeouts on a > traceroute through them, so, lots of asterisks from these systems > indicate a packet loss problem that needs to be fixed?
generation of icmp exceptions e.g. ttl exceeded can/is delberately rate limited, such traffic is sent up to the control plane. if a router is passing traffic loss free through the forwarding plane then you can conclude that it's loss free through the forwarding plane. > Or, are these traceroute asterisks essentially meaningless, and should > be expected on any busy link? more like it's not trivial to conclude what they mean.
