Re: [Mipshop] home addr option doubt

[Emil Ivov <[e-mail]>]

   Hello Rajeev,


> 
> Hello Emil,
> 
> the "Home Address Option" is borrowed from MIPv6, and hence
> is always included with the FBU.

> What would you like to see clarified?
> "Home Address Option" => "Home Address Destination Option" in 6.3.1?

That would most probably make it clearer yes.

Another thing that I'd personally find useful would be adding a few 
words on the fact that encapsulating an FBU means encapsulating it 
together with its IPv6 header (an HAddr option thereof). Again it might 
be just me but the words (6.3.3):

    A MN sends a Fast Neighbor Advertisement to announce itself to the
    NAR. When the Mobility Header Type is FNA, the Payload Proto field
    may be set to IPv6 in order to assist FBU encapsulation.

kind of left me in a doubt. (especially the "may be set to IPv6" part) .
Would it be possible to have sth like:


    A MN sends a Fast Neighbor Advertisement to announce itself to the
    NAR. When the Mobility Header Type is FNA and the message
    encapsulates a Fast Binding Update, the Payload Proto field
    MUST be set to IPv6 indicitaing the following IPv6 header of the
    encapsulated FBU.

... Something more explicit (like the comments in Vijay's letter) would 
probably be even better but I imagine it's a bit late for substantial 
changes in the text.

Cheers
Emil

> This might be possible in the final proof-reading, if not we can address it
> in the next avatar.
> 
> Thanks,
> 
> -Rajeev
> 
> 
> Emil Ivov wrote:
> 
>> Thanks for the reply Vijay,
>>
>> Don't you guys think that it might be handy to have a few words on 
>> that in the draft? It might be just me, but it didn't  seem that 
>> obvious when I read it.
>>
>> Emil
>>
>> Vijay Devarapalli wrote:
>>
>>> Emil Ivov wrote:
>>>
>>>> Hello,
>>>>
>>>> We had a little trouble understanding the exact place where a Home
>>>> Address option is to be included.
>>>>
>>>> All that Section 6.3.1 of draft-ietf-mipshop-fast-mipv6-03.txt says is:
>>>> The FBU MUST also include the Home Address Option and the Home
>>>> Address is PCoA.
>>>>
>>>> One way to do it would be to include the Home Address Option as an
>>>> option of the FBU itself.
>>>>     If that is the case shouldn't this be clarified a bit more? It 
>>>> could
>>>> probably also be included in the  "Mobility Options" part of the 
>>>> message
>>>> format together with:
>>>>
>>>>       MUST contain alternate CoA option set to NCoA IP
>>>>       address when FBU is sent from PAR's link.
>>>>
>>>> Another way to send the HAO would be to include it in a destination
>>>> options header as with BUs?
>>>
>>>
>>>
>>>
>>> section 6.3.1 is talking about the Home Address Option in a destination
>>> options header. not as a mobility option.
>>>
>>>>     If this is the case how should it be transported when an FBU is
>>>> encapsulated in an FNA? As a destination option of the FNA, or should
>>>> the AR addit when resending the FBU?
>>>
>>>
>>>
>>>
>>> the FBU will be an IP packet inside the FNA. the payload proto field
>>> in FNA will be set to IPv6. here is the packet format
>>>
>>>   IPv6 hdr (src=nCoA, dst=NAR)
>>>   Mobility Hdr
>>>       FNA
>>>   IPv6 hdr (src=nCoA, dst=PAR)
>>>   Dst Opts hdr
>>>       Home Address option (pCoA)
>>>   Mobility Hdr
>>>       FBU
>>>
>>> the NAR first processes the FNA part of the packet. if nCoA is valid,
>>> it forwards the inner IP packet to the PAR.
>>>
>>>   IPv6 hdr (src=nCoA, dst=PAR)
>>>   Dst Opts hdr
>>>       Home Address option (pCoA)
>>>   Mobility Hdr
>>>       FBU
>>>
>>> Vijay
>>>
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>>
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> 
> 
> 
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