> Can you site a particular passage in the 3GPP specs that 
 > prohibits the GGSN
 > from allocating any addresses (for its own use) within the 
 > prefix assigned to each
 > PDP context?  If so, DupAddrDetectTransmits=0 is fine.

Here is part of the approved change to 23.060 under the
section "Dynamic IPv6 Address Allocation":

"The GGSN shall not use the prefix advertised to the MS to
configure an address on any of its interfaces."

So it would be OK to suppress DADs in this case.

/Karim
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