[Monami6] mcoas: combined solution

Folks,

Given the last discussion we had on the mailing list, it seems that 
mcoas is a good candidate for a standard track. However, the idea of 
adding more options in the Binding Update (e.g. to specify a preference 
on the CoA) has emerged.

On the other side, documents related to flow redirection such as 
_draft-nomad-mip4-flow-mobility-pb-00.txt_  [TXT] 
<http://www.comnets.uni-bremen.de/%7Ekoo/draft-nomad-mip4-flow-mobility-pb-00.txt> 
, _draft-nomad-mobileip-filters_ [TXT] 
<http://www.comnets.uni-bremen.de/%7Ekoo/draft-nomad-mobileip-filters-05.txt>_, 
__draft-montavont-mobileip-ha-filtering_  [TXT] 
<http://clarinet.u-strasbg.fr/%7Emontavont/ietf/draft-montavont-mobileip-ha-filtering-v6-00.txt> 
and _draft-soliman-mobileip-flow-move-03_ [TXT] 
<http://standards.ericsson.net/karim/draft-soliman-mobileip-flow-move-03.txt>
propose  new options that allows the MN to specify which flow is 
concerned by a BU, and then to register different binding according to 
the flow type. These solutions allow to only redirect one flow from one 
address (and/or interface) to the other without modifying bindings of 
other flows.

At this point, one can think of a unique solution draft, which provides 
the description of all these options. It does not mean that in order to 
register multiple CoAs, the MN will have to send flow information, but 
that it will have the possibility to do so.

Having a solution draft merging all these documents would resolve lot of 
issues raised in draft-montavont-multihoming-pb-statement, such as:

    - 6.1.1 Path Selection (interface and CoA selection): the MN will be 
able to influence the CoA selection on a distant CN and indicate its 
policies.

    - 6.2.1 Binding Multiple CoAs to a given HoA: it will be possible to 
bind several CoAs to a given HoA, which will allow to keep backup CoAs 
(no preferences on CoAs) or to specify preferences with each CoA.

    - 7.3 Flow redirection: an accurate control of the flow redirection 
will be possible

The advantage of merging these documents will be to have a single 
document dealing with all issues related to multiple CoAs registration.

It would be nice if people can express their feeling about this.

Regards,

Nicolas

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