Re: [DNA-BOF] Attachment Detection charter text for discussion

[Brett Pentland <brett.pentland@monash.edu>]

Alper Yegin wrote:
>>>So, I'm still trying to think things through - if you have enough IP
>>>to talk to your hotel authentication web page, but not enough IP to
>>>talk to www.yahoo.com, have we attached?
>>
>>For the purpose of DNA -- probably, since the link is capable of obtaining
>>an IP address and associated configuration information.
> 
> 
> I agree. DNA should detect this as new attachment, so that your host gets a
> new DHCP address and can connect to login web page.

I agree too.  There is certainly important stuff that has to happen 
after this instant, but I think that this is the instant we are trying 
to detect so that our ability to carry out the following tasks is enhanced.

>>For any other useful purpose, probably not.  For example, it would not be
>>profitable to attempt MIP handover on such an interface.
> 
> 
> In the face of such schemes, having an IP address and a default router is
> not sufficient to say you have complete Internet connectivity. Technically,
> you are still not connected, you are "pending authorization." If your Mobile
> IP module could learn this detailed state, so much better. Otherwise, it
> will keep trying and failing, and all of a sudden it will work.... Ugly and
> slow, but not catastrophic.
> 
And if you have to stop and type in a password, your chances of a 
"smooth handover" are probably out the window ;)

Brett.