Re: [MEXT] Review of Re: I-D Action:draft-ietf-monami6-multiplecoa-12.txt

[Christian Kaas-Petersen <kaaspetersen at yahoo.dk>]

The H-bit=1 is not used to turn off neighbor discovery at HA.

The H-bit=1 is used by the mobile node to tell the home agent
it has simultaneous connectivity on home link and one or more
foreign links.  Then the home agent decides who should do neighbor
discovery on the home link (depending on whether
the home agent is the only router on the home link, ie topology a
of Figure 3, or there are other routers on the home link, ie topology b
of Figure 3), and the home agent reports its decision in the status
value of the binding acknowledgement.  In topology a the mobile node
will do neighbor discovery; in topology b the home agent will continue
doing neighbor discovery.

Christian

--- Den ons 18/3/09 skrev Benjamin Lim <benjamin.limck at sg.panasonic.com>:

> Fra: Benjamin Lim <benjamin.limck at sg.panasonic.com>
> Emne: Re: [MEXT] Review of Re: I-D Action:draft-ietf-monami6-multiplecoa-12.txt
> Til: "Christian Kaas-Petersen" <kaaspetersen at yahoo.dk>
> Cc: "George Tsirtsis" <tsirtsis at googlemail.com>, "mext" <mext at ietf.org>
> Dato: onsdag 18. marts 2009 08.17
> Hi Christian, all,
> 
> Pls see inline for some of my comments.
> 
> Christian Kaas-Petersen wrote:
> > The packets I proposed I get from draft 12, section
> 5.4 second paragraph
> > (which details a de-registration with lifetime=0 and
> absence of
> > care-of address) and section 5.6.3 bullets number 1
> and 2 (which detail
> > the presence of the H-bit and the absence of the
> care-of address).
> > 
> > To me, there is no need to register a binding where
> CoA=HoA (use of
> > home link), unless flow binding is used.  
> [Ben] Agree, being simultaneous connected on a home link
> and foreign
> link does not imply that flow binding must be used.
> 
> For example, MN wants to receive packets from devices on
> MN's home link
> through MN's home attached interface.  Rather than
> having those devices
> send the packet to HA who will then forward it to MN's
> foreign attached
> interface, MN uses the 'H' flag to turn off ND-proxy at HA
> and advertise
> MN's home attached interface.  This way, devices in
> the home link will
> send packets to MN's home attached interface.  On the
> other hand, any
> packets not from the home link (e.g. from the global
> Internet) will
> arrive at HA, who in turn forward it to MN's foreign
> attached interface.
> 



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