Re: [MEXT] Comments on draft-ietf-monami6-multiplecoa-13

[Romain KUNTZ <[e-mail]>]

Hi Ryuji,

On 2009/05/11, at 22:59, Ryuji Wakikawa wrote:
>> First, I'd like to express that I support Arnaud's opinion about  
>> section 5.6 (Simultaneous Home and Visited Link Operation). I also  
>> don't see what is the motivation to re-route and tunnel traffic  
>> from the HA to one of the MN's CoA, while the MN is only one hop  
>> from the HA. Even if there is a specific use-case, at the time this  
>> topology was suggested, a simple solution that came out was to  
>> configure a CoA on the Home link and use a tunnel via the home  
>> link. I don't think the little overhead of this solution justifies  
>> the complexity of the one proposed in the draft.
>
> This was discussed at WG. We agreed to have this feature at the end.
> I understand the complexity, but this is how WG agreed.
>
> It is not possible to change the consensus at this moment. We passed  
> all last call.

Ok, this has also been extensively discussed in another thread - I'll  
follow the WG agreement then.

>> Two other minor comments on the draft below:
>>
>> - Section 6.2 (Processing Binding Update)
>>
>>     *  If the 'O' flag is set in the Binding Update, the home agent
>>        removes all the existing bindings and registers the received
>>        binding(s).
>>
>> It is not explicitly said that the MN can use the O flag with a CN.  
>> I think nothing prevents the MN to use it, so we should replace  
>> "home agent" with "receiving node".

You didn't ack the above comment, did you skip it by mistake?


>>  If all the above operations are successfully completed, a Binding
>>  Acknowledgement containing the Binding Identifier mobility options
>>  MUST be sent to the mobile node.
>>
>> The BAck must be sent only if the 'A' flag was set in the BU,  
>> right? or does the MCoA spec mandates sending BAck in all cases?
>
> BA is sent only A flag is set.
> I will update this to
>
>>  If all the above operations are successfully completed, a Binding
>>  Acknowledgement containing the Binding Identifier mobility options
>>  MUST be sent to the mobile node if  'A' flag is set in the  
>> received Binding Update.
>
> Please let me know if you have further comments on this.

Looks fine with me!

Thanks,
romain