impossible circuit

list-nanog at list-nanog at
Sun Aug 17 01:36:23 CDT 2008

> >From the traces I've seen, it seems if the first Sprint hop is sl-bb20-dc, 
> the private IP hops don't show up.  If the first Sprint hop is sl-crs2-dc, 
> then the private IP hops are there.  I wonder if anyone from Sprint can 
> shed some light on that?

That's an interesting correlation, but maybe they don't appear because a router in the path is dropping packets sourced from private IPs?

More information about the NANOG mailing list