Re: off-link model in the 6lowpan talk: draft-ietf-6lowpan-nd-07

[Suresh Krishnan <suresh.krishnan at ericsson.com>]

Hi Hemant,

On 09-11-09 08:16 PM, Hemant Singh (shemant) wrote:
> Humble apologies for not reading this lowpan doc, but I have listened to 
> its core ideas during the past IETFs prezos and understand the link 
> model being used for it.   I still have some general comments that are 
> worth discussing when bringing such work to 6man.
>
>  
>
> Note that if the multi-link, multi-hop network has all client nodes as 
> off-link to each other, then there is only one type of regular ND 
> (RFC4861) RA that can signal off-link.  This is an RA with no PIO 
> (Prefix Information Option).   

This is not accurate. This can also be signaled using an RA including a 
PIO by setting L=0 in the PIO.

> So if the RA has no PIO, how are the 
> lowpann client nodes acquiring their IPv6 address global address without 
> SLAAC getting no prefix from?  In 6man, we would like to know how are 

The A bit can still be set in the PIO to allow for SLAAC.

Thanks
Suresh