Re: [Roll] Semantics of DAO ACK

We have started writing on an IETF draft now so we will write this and submit as 
soon as we have a “complete” draft.

Best regards,
— Joakim Eriksson, SICS

> On 12 Nov 2015, at 17:04, Michael Richardson <mcr+ietf@sandelman.ca> wrote:
> 
> 
> Joakim Eriksson <joakime@sics.se> wrote:
>>> Questions - what if none of the parents has room?  - what if a common
>>> granddad does not have room so there is no way to reach the root? The
>>> route will not be installed and the target does not even know. This is
>>> where Joakim's recursion comes into play with nested DAO acks (if I
>>> understand well). But maybe it would be good that the DIO recursively
>>> expresses that the nodes have at least one parent with room for new
>>> routes.
> 
>> Yes, we have a design where DIO include information (metrics container)
>> about number of neighbors available locally + number of routes free all
>> the way up to the RPL root. If this is available in DIO’s the joining
>> node can do load-balancing by itself and join where it seems most
>> welcome to join. (We have an initial implementation of this but have
>> not tested it in large scale yet).
> 
> It would be great to have this written up.
> 
> --
> Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
> IETF ROLL WG co-chair.    http://datatracker.ietf.org/wg/roll/charter/
> 
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