Hi Erik:

OSPFv3 has similar instances.

Traffic Engineering is all about mapping flows of traffic onto complex
topologies that are designed for those flows.

So nothing real new. RPL just makes that a bit less manual, because we
have harder constraints in terms of scalability and so-called
autonomicity.

RPL dynamically builds its TE topologies and specifies the flow label
interaction a bit deeper to automate the mapping of the flows onto those
topologies.

I see that as extension or evolution, but not revolution. A survival
trait for the Internet Architecture, really.

Pascal


> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On
> Behalf Of Erik Nordmark
> Sent: Monday, May 10, 2010 9:01 AM
> To: [email protected]
> Subject: Re: [6lowpan] [Roll] how does a node get an IP address
> 
> On 05/ 6/10 12:02 AM, Pascal Thubert (pthubert) wrote:
> 
> > The RPL instance decision is end to end and matches the application
> > requirements. A device might send traffic over multiple instances
and
> > it has to indicate that in the flow label.
> 
> Where can I find the architectural definition of "an RPL instance"?
> 
> Is it in essence akin to a VLAN on an Ethernet?
> 
> This sounds like a significant departure from the existing Internet
> architecture.
> 
>     Erik
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