They may not respond for a number of reasons. A lot of routers have an ICMP rate limit parameter which may be set low. Mikrotik v6 has something like this now under ip settings. This is in linux/bsd boxes.
It could also be a firewall that’s dropping the return icmp packets. It could be a router on RFC1918 space so the return packets won’t reach you, most likely blocked due to egress filtering at the upstream ISP. It could just be to overloaded to respond. > Are the .1%'s and the one 0.7% losses any issue? Any hop before a hop which has packet loss can cause higher packet loss numbers further away. It is the public internet and packet loss was assumed to be present and that’s why the protocols handle it. You can only make sure your network is clean of loss and complain if others are not. When you run a continuos ping, what is the loss? Justin Miller VA SkyWire, LLC 1707 E Main St Richmond, VA 23223 Office: (804) 521-4212 Desk: (804) 591-0500 ext 101 Fax: (804) 591-1559 [email protected] <mailto:[email protected]> > On Jan 2, 2015, at 3:20 PM, TJ Trout <[email protected]> wrote: > > How's this? > > On Fri, Jan 2, 2015 at 10:54 AM, Justin Miller <[email protected] > <mailto:[email protected]>> wrote: > That hop #14 is not responding to your traceroute’s icmp requests for some > reason. It’s actually common and likely not an issue here. > > Have a look here: > https://www.nanog.org/meetings/nanog47/presentations/Sunday/RAS_Traceroute_N47_Sun.pdf > > <https://www.nanog.org/meetings/nanog47/presentations/Sunday/RAS_Traceroute_N47_Sun.pdf> > You can likely find a video of this guys talks as well. > > Justin Miller > > VA SkyWire, LLC > 1707 E Main St > Richmond, VA 23223 > Office: (804) 521-4212 <tel:%28804%29%20521-4212> > Desk: (804) 591-0500 ext 101 <tel:%28804%29%20591-0500%20ext%20101> > Fax: (804) 591-1559 <tel:%28804%29%20591-1559> > [email protected] <mailto:[email protected]> >> On Jan 2, 2015, at 1:49 PM, TJ Trout <[email protected] >> <mailto:[email protected]>> wrote: >> >> Can someone tell me how to read these mikrotik traces (specifically the loss >> area) how much loss is normal? I tried tracing to 10+ IP's at the same time >> and about 50% show 0% loss at all hops, while the others show various >> amounts of loss and I can't imaging they are all true loss that would cause >> a problem? >> >> This specific customer in the attached trace is complaining of loss of sound >> when doing VOIP, and the trace shows some loss, is this an acceptable amount? >> >> >> <Untitled.png>_______________________________________________ >> Mikrotik-users mailing list >> [email protected] <mailto:[email protected]> >> http://lists.wispa.org/mailman/listinfo/mikrotik-users >> <http://lists.wispa.org/mailman/listinfo/mikrotik-users> > > > _______________________________________________ > Mikrotik-users mailing list > [email protected] <mailto:[email protected]> > http://lists.wispa.org/mailman/listinfo/mikrotik-users > <http://lists.wispa.org/mailman/listinfo/mikrotik-users> > > > <Untitled.png>_______________________________________________ > Mikrotik-users mailing list > [email protected] > http://lists.wispa.org/mailman/listinfo/mikrotik-users
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