Hi Carsten,

----- Original Message -----
> From: Carsten Bormann <[email protected]>
> To: Mark Smith <[email protected]>
> Cc: "[email protected]" <[email protected]>; "[email protected]" <[email protected]>; 
> "[email protected] List" <[email protected]>; "core ([email protected])" <[email protected]>
> Sent: Saturday, 30 March 2013 8:25 AM
> Subject: Re: GHC now crunches DTLS (Re: [Roll] [6lowpan]  draft-bormann-ghc)
> 
> On Mar 29, 2013, at 22:11, Mark Smith <[email protected]> wrote:
> 
>>  RFC5175, "IPv6 Router Advertisement Flags Option"
> 
> EFO was inspiration for 6CIO, but is different from 6CIO in that it is about 
> flags promulgated by a router (and therefore can only be used in an RA).
> 6CIO is about the capabilities of the node sending that option.
> That's why they are not the same thing.
> 
> 6CIO is indeed meant to be general enough to carry other node capabilities 
> that 
> are relevant to a node-node situation.  ROHC-over-802 could have used it.  
> That's why I'm proposing creating an IANA registry. to make the other 47 
> bits available for other uses.
> 
> I'm completely neutral to whether GHC's compression scheme and 6CIO 
> should be done in a combined draft or separate drafts.  In the latter case, 
> stealing more text from 5175 is an obvious thing to do.
> 
> Is there anything that could/should be generalized about 6CIO?
> (Without making it more complex, please.)
> 

The name is pretty much it - "IPv6 Neighbor Capability Flags Option" or similar 
would be better and more general. I mentioned RFC5175 because the processing 
rules in that probably would be the same for this option and therefore could be 
stolen. I think they would need to be specified somewhere that isn't 6LowPAN 
specific, which is why I suggested a different ID.

Best regards,
Mark.
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