Re: [Mipshop] home addr option doubt

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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