[nemo] RE: RO between MR and CN

["Pascal Thubert \(pthubert\)" <[e-mail]>]

Hi Tania

I was thinking things like of snooping. MR might intercept all packets to LFN, recognize a HoT and keep it. I remember discussing that with Alex long ago... Anyway, we try to say "don't take that path" as opposed to describe a solution in details.

It seems preferable, for instance, to establish a MR-CR tunnel and exchange fine grained routes for MNPs over the tunnel (route projection).

Pascal

> -----Original Message-----
> From: Tânia Pinto Calçada [mailto:[e-mail]]
> Sent: mercredi 13 octobre 2004 13:16
> To: [e-mail]
> Cc: Pascal Thubert (pthubert)
> Subject: RO between MR and CN
> 
> Hello,
> 
> 
> 
> I am interested in route optimization between the MR and the CN. I read the taxonomy draft
> (draft-thubert-nemo-ro-taxonomy-02.txt), and several other documents related to RO:
> 
> draft-jeong-nemo-ro-ndproxy-02.txt
> 
> draft-leekj-nemo-ro-pd-02.txt
> 
> draft-na-nemo-gen-ro-model-00.txt
> 
> draft-na-nemo-path-control-header-00.txt
> 
> draft-wakikawa-nemo-orc-00.txt
> 
> ROProblem.txt
> 
> 
> 
> I also read some threads of the NEMO mailing list http://www1.ietf.org/mail-
> archive/web/nemo/current/index.html <http://www1.ietf.org/mail-
> archive/web/nemo/current/index.html> , however I am still looking for a document that
> describes a solution for the RO between the MR and the CN.
> 
> 
> 
> The taxonomy draft says at section 2:
> 
> "A major issue with this form of optimization is that the end-to-end
> 
>    principle of the MIPv6 Reverse Routability (RR) test is broken.  The
> 
>    RR test is meant to ensure the care-of address (CoA) and the home
> 
>    address (HoA) are collocated. With a mobile network, when the MR
> 
>    performs RO on behalf of the MNNs, the CoA in BU will be the MR's
> 
>    CoA.  Thus, a MNN is reachable via the CoA, but not at the CoA.
> 
> 
> 
>    Some tricks may be performed on the fly by the MRs but it seems that
> 
>    a clean MR-to-CN optimization for Nemo will impact the CN function."
> 
> 
> 
> Can somebody point the "tricks" that may be performed, or indicate a document that explores
> this subject?
> 
> 
> 
> Regards,
> 
> Tania Calcada