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

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

Jari Arkko wrote:
> Brett Pentland wrote:
> 
>> Greg Daley wrote:
>>
>>> "Network Attachment occurs when a host arrives on
>>> a new IP subnet. When attaching to a network, a
>>
>>
>>
>> I'm not sure that "when a host arrives on a new subnet" is the
>> correct way to define this.  Perhaps something along the lines of
>> "when an interface becomes active on a link instance" with an
>> appropriate definition of "link instance" in the terminology
>> document.
> 
> 
> Does this formulation require that the link layer
> always be able to deliver up/down information to the
> IP stack? I realize that for fast movements this is
> probably a requirement anyway, but there may be
> other cases where lack of hints could be tolerated.
> 
> --Jari
> 
Perhaps my wording is not so good after all.  I simply meant that
"network attachment" occurs when an interface becomes active on a
link instance.  How that is detected is the work of DNA.  It may be
hinted at by an L2 trigger, or perhaps is not noticed for a little
while until an RA is received.  Making the most of the available
information and determining exactly what it means (with respect to
the need for configuration changes) is what I think we need to work
on.

Brett.