Help interpret a strange traceroute?

William Herrin bill at
Mon Oct 31 19:42:33 UTC 2016

On Mon, Oct 31, 2016 at 3:33 PM, Randy <amps at> wrote:
> Any idea how a traceroute (into my network) could end up this fubar'd?
> Discovered this wierd routing while investigating horrendously slow speeds
> (albeit no packet loss) to a particular ISP abroad.

Hi Randy,

This is per-packet load balancing. In the forward path the alternates
are different lengths but the traceroute stops as soon as at least one
of the paths reaches the destination.

The return path is also engaged in per-packet load balancing but the
paths are all the same length.

Bill Herrin

William Herrin ................ herrin at  bill at
Owner, Dirtside Systems ......... Web: <>

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