[6lowpan] How to find the mailbox? (related to "Advertize on Behalf")

OK, so now I can send this "Advertize on Behalf" flag.

As mentioned yesterday, there is a distinction between Frequently Listening (a.k.a duty cycled nodes) and
what I call call-back nodes, i.e. nodes that depend on a router holding a mailbox for that node.
Whether that mailbox feature is provided by any router, a few specialiezed routers or the border router
is a network implementation decision.
But how is that information conveyed to the sleeping node?

In the RA? 
By asking the default router with some new message?
Whereever this mailbox feature is offered in the network, this is where I will be sending 
my "Advertize on Behalf" flag if I am a call-back node.

Forgive me if this is obvious. I think I am getting close to a "detail overload" ;-)

Thanks,
  Anders

________________________________

Fra: 6lowpan-bounces@ietf.org på vegne af Mukul Goyal
Sendt: ti 29-03-2011 18:47
Til: Carsten Bormann
Cc: 6lowpan
Emne: Re: [6lowpan] "Advertize on Behalf" flag in ARO

Hi Carsten

>Hosts don't take part in routing protocols

I agree absolutely.

>The only source of information about reachability and network configuration a host has is ND (and DHCP for some of the latter, if present).

I agree. That's why I think 6lowpan ND should provide a mechanism to clearly identify a registered neighbor as a 6lowpan host or a 6lowpan router.

Thanks
Mukul

----- Original Message -----
From: "Carsten Bormann" <cabo@tzi.org>
To: "Esko Dijk" <esko.dijk@philips.com>
Cc: "Erik Nordmark" <nordmark@acm.org>, "Mukul Goyal" <mukul@uwm.edu>, "6lowpan" <6lowpan@ietf.org>
Sent: Tuesday, March 29, 2011 8:14:34 AM
Subject: Re: [6lowpan] "Advertize on Behalf" flag in ARO

On Mar 29, 2011, at 14:55, Dijk, Esko wrote:

> RPL reachability is indeed advertised to both 6LR/6LNs, the only distinction is that a 6LN (host) would operate as a RPL leaf node

Hosts don't take part in routing protocols, so I don't understand this sequence.
The only source of information about reachability and network configuration a host has is ND (and DHCP for some of the latter, if present).

Gruesse, Carsten

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