[DNA] Host BCP Issue 1: Same link vs Link change

[Sathya Narayanan <sathya@research.panasonic.com>]

Issue 1: Same link vs Link change
Should the BCP make recommedations to the host only to find if there is 
a link-change? If the host is on the same link - is it OK if the host 
doesn't find out that it is on the same link efficiently? This question 
I think shows up both on the BCP and on the solutions work.

 From the goals:
G1: DNA schemes should detect the identity of the currently attached  
link to ascertain the validity of the existing IP configuration. They 
should recognize and determine whether a link change has occurred and 
initiate the process of acquiring a new configuration  if necessary.

The first sentence makes it sound like the goal is to 'detect identity' 
irrespective of whether the link has changed or not. The second sentence 
makes it sound like our focus is only to detect 'link-change' and 
initiate the process of ...

FWIW, I think DNA should not differentiate between same-link and 
link-change. DNA should define efficient mechanisms (in BCP and Soln.) 
for the hosts to quickly identify its current link, whether it be the 
same or different link.

What do others think?

- Sathya