Subject: RE: FEEDBACK REQUESTED -- RE: 3gpp-analysis-04: Transition mechan isms at UEs; 3GPP IPv6 deployment [issue 6] (fwd)

From: Soliman Hesham <[email-masked]>
Date: Wed, 3 Sep 2003 15:46:03 -0400

> >  > - if the UE is dual stack (anyway), then to save one 
 > PDP context, you
 > >  > tunnel the other IP version on the established PDP 
 > context. example:
 > >  >  + your PDP context is IPv4. you need IPv6: tunnel v6 in v4.
 > > 
 > > => Where does the IPv6 address come from? Unless you have 
 > > a v6 PDP context you can't get an IPv6 address.
 > 
 > if you use some tunneling technique, then you will get one. 
 > Tunnel broker,
 > as an example, will give the tunnel endpoint (UE) through 
 > the TSP session
 > the ipv6 address to use over the tunnel. It could also send 
 > the ipv6 prefix
 > in case the UE is a router/gateway to a personal network. 
 > Other tunnelling
 > techniques will give the Ipv6 address (6to4 or teredo based 
 > on the ipv4
 > address).

=> So a tunnel broker will be needed even if the 
GGSN is dual stacked. 

Hesham