Re: [DNA-BOF] [Announce] DNA in IPv6 Problem Statement ID

[JinHyeock Choi <athene@sait.samsung.co.kr>]

Dear Daniel 
 
> Most of all, my understanding is that this document (problem statements)
> will be referred to as a basis to several solution document. So it
> should
> address some possible alternative or solution in this document, of
> course
> it is a small text for each, and solution document will address these
> more detail...

I don't know it's wise to mention solutions at this stage. It's my opinion that the DNA 
problems are not clear enough yet. 

I agree with Greg to just specify the problems in this document, without reference to 
solutions. If necessary, we can add solution part at the later versions. 

> Unclear Boundary (can be solved by link supporting)
> No transitivity (L bit is off ?)
> Link local scope of Router Address (R bit in Modified Prefix Information
> option)
> Omission of Prefix Information Option (RS/RA exchange)

Currently Greg Daley and I are preparing the I-D on the above issues: 

Router Advertisement Issues for Movement Detection/ Detection of Network Attachment 

We found the information in RA is not adequate for efficient Movement Detection. It describes 
the problems we encountered and investigates the possible solutions. We will submit it to IPv6 
WG in a few days. 

> I agree with your definition however I guess this problem should be
> devided into both a host perspective and a router perspective.

This is an interesting point and it may be useful. Thanks.  

> After then we can definitely propose reasonable solutions to meet with 
> each perspective.
> 
> For example:
> a host perspective: DAD delay, random delay, waiting time for RA, link
> up delay.

I don't think DAD delay is one of DNA delays. IMHO, we should distinguish DNA 
delay and Handoff delay. We'd better clarify the definition of DNA delay lest there 
should be confusion.

> a router perspective: random delay, unsolicited RA interval.

We forgot to mention the waiting time for an unsolicited RA. Thanks. 
 
Best regards

JinHyeock