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

[Greg Daley <greg.daley@eng.monash.edu.au>]

Hi JinHyeock,

JinHyeock Choi wrote:
[chop prior text]
> 
> 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.   

Indeed.  In some networks, forwarding state will need to be updated
by transmitting MAC frames (with a matching MAC to that perviously
used) onto the medium.

This may need to be done, perhaps with an RS, but the response from
the router needn't arrive before packets start flowing.

Greg