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

[JinHyeock Choi <jinchoe@gmail.com>]

Dear Sathya

> 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 ...

The first and second sentence are intended to mean the same.  
 
> 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.

I agree that DNA should detect link identity EFFICIENTLY, whether
link change or not.

But I don't think that implies that a host needs to QUICKLY find out 
that it still remains at the same link. 

In case of a link change, it's important for a host to quickly check 
for link change lest there should be service disruption. 

But in case of no link change, I can't think of any harm from 
a little DNA delay.   

Best Regards

JinHyeock