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Re: [MEXT] Removing bindings for IPv4 only - please comment



Thanks Hesham - I think this text covers the case I was referring to

Gerardo

> -----Original Message-----
> From: Hesham Soliman [mailto:hesham at elevatemobile.com]
> Sent: Thursday, December 11, 2008 10:28 PM
> To: mext at ietf.org
> Cc: Giaretta, Gerardo; marcelo bagnulo braun; Julien Laganier; Jari Arkko
> Subject: Removing bindings for IPv4 only - please comment
> 
> Hi all,
> 
> Gerardo requested that we consider the issue of removing an IPv4-only
> bindings in the spec. We discussed this with the chairs and it seemed like a
> simple add-on to the spec. I'm still wondering if this is the same thing
> that Karen asked for earlier and we decided to do it separately. If it is,
> then I don't understand why we didn't consider the following solution (can't
> remember if I suggested it before).
> 
> I've added the following text to the draft, please let me know if you have
> any comments ASAP. I want to submit this version on the weekend if possible.
> All the IESG comments have been included. It's pretty straight forward and
> follows standard MIPv6 logic.
> 
> <section title="Removing Bindings">
> 
> <t>Mobile nodes will remove bindings from the home agent's binding cache
> whenever they move to the home link, or simply when mobility support is not
> needed.</t>
> 
> <t>De-registering the IPv6 home address is described in <xref
> target="RFC3775"/>. The same mechanism applies in this specification. Mobile
> nodes may remove the binding for the IPv4 home address only, by sending a
> binding update that does not include the IPv4 home address option. Upon
> receiving this binding update, the home agent will replace the existing
> cache entries with the content of the new message. This ensures that the
> IPv4 home address binding is removed, while maintining an IPv6 binding.</t>
> 
> <t>Note that the mobile node cannot remove the IPv6 home address binding
> while maintaining an IPv4 home address binding.</t>
> 
> <t>A binding update message with a lifetime of zero, will remove all
> bindings for the mobile node.</t>
> </section>
> 
> Hesham
> 

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