Re: charter [Re: how mobile do we want to be]

[marcelo bagnulo braun <marcelo@it.uc3m.es>]

Hi Pekka,

> After all, we are not solving "the site multihoming problem" so we 
> don't reference an architecture document -- just one but possibly 
> important subset of it.  Namely, connection survivability across 
> failures when using multiple PA addresses... everything else is bonus.

Well, i am not fully agree with you here.

I mean the charter does state that


Site-multiHoming by IPv6 interMediation (shim6)

Description of Working Group:

The shim6 WG is to produce specifications for an IPv6 site-multihoming
solution based on the architecture developed by the IETF multi6
WG.

...

In addition to the basic network layer shim solution, the shim6 WG
is specifically chartered to do work on

      o Solutions for site exit router selection that works when each 
ISP
        uses ingress filtering, i.e. when the chosen site exit needs to
be
        related to the source address chosen by the host. This solution
        should work whether or not the peer site supports the shim6
protocol.

      o Solutions to establish new communications after an outage has
        occurred that does not requires shim support from the
        non-multihomed end of the communication. The wg will explore
        if such solutions are also useful when both ends support the
shim.

      o Congestion control and explore how this and other QoS and
        traffic engineering issues may interact with the use of
        multiple locators at both ends.


So, as i see it this covers the ingress filtering problem, the 
establishement of new communications after an outage and the 
preservation of new communications.
Besides, some understanding of TE concerns is also within scope (ok, i 
agree that probably we won't be able to achieve features equivalent to 
those available in BGP v4 solution with respect to this)

So, i guess the charter is wider than just preserving established 
communications.

Regards, marcelo



> --
> Pekka Savola                 "You each name yourselves king, yet the
> Netcore Oy                    kingdom bleeds."
> Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings