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Re: [Roll] RA-DIOs and next-door destinations

"Julien Abeille (jabeille)" <jabeille@cisco.com> Tue, 04 August 2009 07:25 UTC

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Date: Tue, 04 Aug 2009 09:25:19 +0200
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Thread-Topic: [Roll] RA-DIOs and next-door destinations
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References: <87prbc5231.fsf@kelsey-ws.hq.ember.com> <B8949F83-E028-4CAE-B5E4-E74EC5531F66@archrock.com>
From: "Julien Abeille (jabeille)" <jabeille@cisco.com>
To: Jonathan Hui <jhui@archrock.com>, Richard Kelsey <richard.kelsey@ember.com>
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Cc: roll@ietf.org
Subject: Re: [Roll] RA-DIOs and next-door destinations
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Hi Jonthan,

To me learning what global addresses are assigned to neighbors is not of great help for routing, hence looks like (layer 5) service discovery. Not sure ROLL should care about this.

Cheers,
Julien


> -----Original Message-----
> From: roll-bounces@ietf.org [mailto:roll-bounces@ietf.org] On 
> Behalf Of Jonathan Hui
> Sent: lundi 3 août 2009 21:38
> To: Richard Kelsey
> Cc: roll@ietf.org
> Subject: Re: [Roll] RA-DIOs and next-door destinations
> 
> 
> Hi Richard,
> 
> On Aug 3, 2009, at 8:50 AM, Richard Kelsey wrote:
> > In the section on RA-DIO reception, draft-dt-roll-rpl-01 
> says that a 
> > RA-DIO from a neighbor that is not a potential parent or a sibling 
> > should be ignored.  Is it permissable to remember the neighbor in 
> > order to route messages to it directly?  In other words, 
> can a packet 
> > whose destination is a neighbor with a greater depth be 
> sent directly 
> > to that neighbor?
> 
> 
> Let me speak to your comment directly, rather than the draft.
> 
> I don't see any problem using the RA-DIO to figure out what 
> neighbors are around you. One issue is that if the RA-DIO 
> source address is a link-local address, it may not be so 
> useful if you're trying to talk to that node using its global 
> address. What is more useful is to allow including some kind 
> of DAO in the same RA so that you know what addresses (other 
> than the source address) are assigned to that node's interface.
> 
> --
> Jonathan Hui
> 
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