Re: [DNA] Issue about multiply connected to the same link and DNAbeing per-interface or not (was Re: WG LC comments ondraft-ietf-dna-goals-01.txt)

[Pekka Nikander <pekka.nikander@nomadiclab.com>]

Erik,

> I still don't understanding which assumption you are making.

I guess I wasn't clear enough in my own thinking.  I was mostly
motivated by the fear of painting ourselves somehow into a corner.

>> I was mostly objecting the notion that we should keep DNA on
>> separate interfaces _completely_ independent.  To me, it looks
>> like that there are cases when they are not.  I am oblivious
>> how to handle this, through link hints, relaxing the language
>> in the goals draft, or whatever.
>
> Yes, at least across interfaces with compatible technology
> it makes sense to share retained information. Imagine a host
> which remembers DNA info (prefixes, default routers) and binds
> them with some L2 key (the MAC address of the Ethernet bridge or
> AP).  If the host has multiple Ethernets interfaces (or multiple
> 802.11 interfaces) it should be able to find this cached
> information and make use of it; we shouldn't require that
> the same Ethernet wire be plugged in as the last time.

Good example, thanks!

--Pekka