>Seems to me that what you are seeing there is the traffic leaving the
>backbone and entering USWEST's internal network.
>Note the name of the last hop:VDSL
>The traffic exits the backbone at 206.80.192.253 and enters USWESTS internal
>network, from there it reaches the DSLAM and ultimately the customer.
>Nothing odd about that.


Assume uswest.net then connects to TheBorg.net (a division of 
Worldcom).  TheBorg.net also uses private address space, and, at 
random, they pick the same addresses as uswest.net:

>13   206 ms  179 ms  123 ms  gig0-0-0.phnx-sust1.phnx.uswest.net
>[206.80.192.253]
>14  1016 ms  151 ms  975 ms  207.224.191.2
>15   233 ms  124 ms  123 ms  192.168.8.1
>16   151 ms  179 ms  123 ms  192.168.100.147
>17   247 ms  192 ms  151 ms  vdsl-130-13-102-120.phnx.uswest.net
  18   150 ms   160ms   120 ms  192.168.8.1
  19   150 ms   160ms   120 ms  192.168.100.147
....

am I seeing a loop?  How do I know?

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