Re: [Mip4] Request to consider FMIPv4 as a working group document

[Kent Leung <kleung at cisco.com>]

At 12:20 PM 3/18/2005 -0800, Charles E. Perkins wrote:


> >   - Key difference between MIPv4 and MIPv6 is FA existence.
>
> Well -- there are route optimization details and additional security
> features that are also key differences...  But these are not necessarily
> relevant to FMIPv4.


The relevance is in the next point of scoping the solution space.


> >  - FMIPv4 enabled ARs not being FAs is unlikely, IMHO.  So
> >    we can simplify by specifying only FA mode operation, no CCoA
> >    support needed since ARs would have to be MIPv4 enabled.
> >    This would fit the deployment model and clean up most of
> >    draft dealing with IP address management.
>
> I think it is reasonable to have an access router that is not
> a foreign agent.  Specifying that operation does not seem to
> complicate the rest of the specification which relates to the
> case of AR == FA.  So, I don't see any reason to take out
> that part of the specification, and it could be useful.


My point here is that "Is it realistic to upgrade the access router
with Mobile IP fast HO function w/o FA?"  Why would a network
deploy MIP and upgrade the IPv4 access router to aid Mobile
IP clients for handover and not perform FA service?  I believe
if only FA mode is supported, the draft would be simpler to
understand and implement.  Maybe I should write up a
narrow-minded version? ;)


> >  - Support for fast handover in WiFi already exists today w/o
> >    MIPv4 involvement.  Therefore, realizing deployments using
> >    this type of scheme will be difficult.
>
> Even WiFi access points or access point controllers might
> well implement this feature, especially for the case of
> heterogeneous media.


I don't see why since solution already works and end users don't care
if Mobile IP is used or not to obtain fast handover.  I think some
of the concepts in the draft are useful in practice.

Kent
--
     |           |                   Kent Leung
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