Re: [Mip4] WG Last call on draft-ietf-mip4-dynamic-assignment-00.txt (SECOND REQUEST)

[Yoshiyuki Tsuda <yoshiyuki.tsuda at toshiba.co.jp>]

Hello Hans,

 Your comment is interesting, but it isn't directly related to
 dynamic HA, but rather related to NAT traversal in case of
 an HA sitting behind NAT, I'm afraid.  So, we had better
 discuss about your issue as an improvement of the current
 NAT traversal RFC, or a separate draft.
 I think, if you can describe that your issue has more close
 relation to dynamic HA, rather than NAT traversal, it will
 help the authers to answer to you.

Cheers.
-Yoshi

at Thu, 12 Feb 2004 16:50:44 +0100 Hans Sjöstrand wrote:
>Sorry for being late with my comment,
>
>I think the proposal is a good proposal. And so does a few of my 
>customers who has asked for the functionality. To bad that they didn't 
>flag their interest on the list.
>
>However, there is one thing that I think is needed to be added to the 
>draft to make the function usable. The extension carries to little 
>information.
>
>Normally a router or gateway with HA functionality have several 
>interfaces. The natural setup is that the gateway is accessible to 
>internet on one interface (or address) and have the HA advertising the 
>home network on another network. In many cases the home network have a 
>private address space.
>
>The MN needs to know two things,
>1) The address which I can reach my home agent from internet (the 
>"external address").,
>2) The address which my home agent is advertising on the home network 
>(the "internal address").
>
>In the case with dynamic home agent assignment, the MN is informed about 
>the assigned "external address", but he is totally unaware of the 
>"internal address". Subsequently the MN will never be able to recognise 
>when he has entered his home network. Therefore this information needs 
>to be relayed to him. Preferably in the Redirected HA address extension 
>which then would look something like
>
>   0                   1                   2                   3
>   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
>  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>  |     Type      |    Length     |               Reserved        |
>  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>  |                   Home Agent External Address                 |
>  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>  |                   Home Agent Internal Address                 |
>  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>
>  Home Agent External Address The IP address that the home agent is 
>externally
>                              reachable. This might be a IP address on 
>the Home
>                              agent or a IP address of an external 
>device that
>                              will redirect or map the IP packets to the 
>home agent.
>
>  Home Agent Internal Address The IP address of the home agent. This 
>might be the
>                              same address as the Home Agent External 
>Address or an
>                              address on an internal network. This 
>address MUST be
>                              the same address that the Home agent uses 
>for the
>                              Mobility Agent Advertisements.
>
>
>Best regards
>/// Hasse
>
>Henrik Levkowetz wrote:
>
>>SECOND REQUEST - To date, no response to this WG last call has been
>>received.  If enough responses are not received to support the
>>acceptance of this document, it *will not* be submitted to the IESG for
>>publication.  Please respond to this WG last call.  If you support
>>acceptance of the document without change, respond with a simple
>>acknowledgment, so that support for the document can be assessed.
>>
>>--------
>>
>>This message announces a WG last call on "Mobile IPv4 Dynamic Home Agent
>>Assignment" <draft-ietf-mip4-dynamic-assignment-00.txt>.  The last call
>>will conclude at 24:00 UTC on Friday, 13th Feb 2004.
>>
>>Please respond to this WG last call.  If you support acceptance of the
>>document without change, respond with a simple acknowledgment, so that
>>support for the document can be assessed.
>>
>>draft-ietf-mip4-dynamic-assignment-00.txt proposes a messaging mechanism
>>for dynamic home agent assignment and HA redirection. The goal is to
>>provide a mechanism to assign an optimal HA for a Mobile IP session
>>while allowing any suitable method for HA selection.  
>>
>>This draft is available as
>> <http://www.ietf.org/internet-drafts/draft-ietf-mip4-dynamic-assignment-00.txt>
>>
>>	Regards,
>>		Henrik
>>  
>>
>
>
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