Re: [DNA] Last call: Detection of Network Attachment (DNA) in IPv4(fwd)

[JinHyeock Choi <jinchoe@samsung.com>]

Dear Bernard

I'd like to mention a few differences between DNA for IPv4 (DNAv4) 
and DNA for IPv6 (DNAv6). 

1. Abbreviation
For IPv4, DNA stands for "Detection of Network Attachment", whereas 
for IPv6, DNA stands for "Detecting Network Attachment". 

2. DNA Goal
I understand DNAv4 aims to detects movement (or lack of movement) 
between subnets, and obtains (or continue to use) a valid IPv4 configuration. 

DNAv6 aims to detect movement (or lack of movement) between links 
to ascertain the validity of existing IP configuration but does not include 
the actual IP configuration procedure.  

3. Point of Attachment
In DNA mailing list, we define a term "Attachment Point", which represents 
the link-layer connection. 

For example, assume the case of two 802.11 b APs and a router on the same 
ethernet link. Each AP is an Attachment Point and if a host moves from 
one AP to another, it has moved to a different Attachment Point. 
     
It's my impression that the "Attachment Point" from DNA WG and 
"Point of Attachment" from the draft doesn't mean the same thing. 
 
Also I am glad & relieved to see that the draft no longer includes the term 
'link identifier'. Though the draft still uses the term 'link' a few times, 
the meaning is clear from the context. 

Thanks for your kind consideration.   

Best Regards

JinHyeock