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Barbara, Please see in line below. From: Stark, Barbara
[mailto:bs7652@att.com] >You don’t think that AT&T the DSL SP will know what AT&T
wireless might be doing with a device that’s connected to AT&T the
application service provider? J Oh ye of little faith. Have
you never seen the movie “The President’s Analyst”? Movie recommendations are very much appreciated, especially on a
Friday J and
hilarious ones at that, in any context – I have not seen this movie. It would
be interesting to see AT&T’s network for DSL and wireless data services as
to how such large subscriber sets are merged for routed domains and also how
routing prefixes are propagated between their DSL and cellular data links. I
also said, cable or DSL. If the home has cable broadband, the Comcast cable
doesn’t know about AT&T wireless prefixes. >But no, in the case you describe, the cellular network that
provides this iPhone with 3G connectivity would need to send route info in its
RA, specifying the prefixes of its walled garden, to the iPhone. If the DSL
connection is just a plain vanilla connection, there would >be no
route info coming at the iPhone from its Wi-Fi interface. The DSL provider
doesn’t need to know about the 3G connection – only the iPhone knows. Hmm, in cable modem IPv4 access in my home, my iTouch acquires
an IPv4 address from the wireless router in my home behind the cable modem. I
surf the Internet with the iTouch just fine. So when this home network moves
to IPv6 in future, the wireless segment of my home router has got to send an RA
for any IPv6 wireless device in the home to acquire an IPv6 address including
the iTouch. Have a good weekend to all. Hemant |