The !H indicates host unreachable.  I'm guessing that some router near the
host has a 4.5 second ARP timeout.  It's not a latency issue, but probably
an end host issue.


On Fri, May 9, 2014 at 11:12 AM, Kyle Farmer <[email protected]>wrote:

> Cogent has had a issue for a few days now, causing extreme latency across
> the network;
>
>     be2437.ccr21.alb02.atlas.cogentco.com (66.28.4.197)  38.219 ms
> 10  te0-0-2-0.agr11.alb02.atlas.cogentco.com (154.54.5.161)  37.838 ms
>     te0-0-2-2.agr11.alb02.atlas.cogentco.com (154.54.28.82)  37.968 ms
>     te0-0-2-0.agr11.alb02.atlas.cogentco.com (154.54.5.161)  38.100 ms
> 11  te0-0-2-0.agr11.alb02.atlas.cogentco.com (154.54.5.161)  4645.684 ms
> !H  4503.251 ms !H
>     te0-0-2-2.agr11.alb02.atlas.cogentco.com (154.54.28.82)  4581.944 ms
> !H
>
>
> Can anyone verify what is going on?  I called them a few weeks ago so I'm
> hoping this might hit some admins who work there.
>
> --Kyle
>
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