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

[Alper Yegin <alper@docomolabs-usa.com>]

>> 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.

> 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.

Alper