Re: [MEXT] Some questions on draft-sarikaya-mext-multicastdmm

[Behcet Sarikaya <[e-mail]>]

Hi Romain,
  Thanks for your mail. My replies inline.

Regards,

Behcet



> Hello Behcet,
> 
> I'm currently updating draft-kuntz-dmm-summary and was  considering including 
>draft-sarikaya-mext-multicastdmm. However I have a few  questions about your 
>draft.
> 
> To me it seems that your proposal is not a  DMM solution by itself but is built 
>upon draft-kassi-mobileip-dmi. Am I right?  Is the exact motivation of your 
>proposal to support multicast on the mobile node  when DMI is used?
> 

My draft is intended to be a candidate for Mext WG charter item on dmm and it is 
inline with the discussions we had in the last Mext session on dmm, I don't 
remember where, was it Beijing, IETF 79?
.
If you are saying that  cellular network application is emphasized, yes, I think 
that cellular networks are of course the place where we should look for 
deployment possibilities.

I think multicast support is important and so far no other draft talks about 
multicast. That's why multicast is covered in my draft.


> About the solution itself:
> 
> * Section 3: 
> 
>   "MN starts to receive the packets over HA-MN link from
>     CN and MN starts to send packets with a destination option containing
>     the previous Care-of Address as MN's Home Address (HoA) to the CN."
> 
> I'm  not sure why you are doing this? This sounds like route optimization to  
>me.
> 

Why not? This is the behaviour MN should have because HA keeps changing, right?

> * Section 6: 
> 
>   "Multicast state for the mobile node is  usually established when
>    mobile node was on the link and the state in  Multicast State mobility
>    option normally must match this state and  the multicast state sent by
>    the mobile node becomes the multicast  state of the mobile node when
>    communicating over MN-HA  tunnel."

OK, let me clarify this in the next version.



> 
> This sentence is quite hard to understand. Can you  explain?
> 
> 
> Thank you,
> Romain