RE: [mobile-ip] Re: FW: I-D ACTION:draft-tsirtsis-dsmip-problem-0 0.txt

 > > We can always complicate things but why not deal with the 
 > simple and by far
 > > most important issue.
 > > 
 > > Today Mobile IP signals HoA to CoA bindings of the same 
 > version resulting in
 > > either IPv4 over IPv4 encapsulation or IPv6 over IPv6 
 > encapsulation.
 > > 
 > > All I am suggesting is that Mobile IP should be able to 
 > signal HoA to CoA
 > > bindings of different versions so that IPv4 over IPv6 
 > encapsulation or IPv4
 > > over IPv6 encapsulation is also possible.
 > 
 > And what benefit, exactly, would the change in encapsulation 
 > have?  

=> Did you see the problems in the draft? I'll sumarise:
- half the signalling in the local and home domain
- One mobility management protocol is used.
- IPv6 Connections survive moving from a dual stack network
to a V4 only network.

   The 
 > Home Agents and the nodes would still have to support both 
 > versions, you 
 > would just end up with two Mobile IP protocols which (to 
 > some extent) 
 > supported both IPv4 and IPv6.

=> Only one MIP version is needed. Of course a dual stack
is needed in the HA and MNs but _not_ dual MIP versions.

 > It seems like HIP fits the bill quite nicely, and would be 
 > architecturally 
 > better approach than trying to glue MIPv4 and MIPv6 together somehow.

=> This is not a research project though. MIP is  
deployed as we speak. 

Hesham