On Mon, 10 Aug 2015, Pascal Thubert (pthubert) wrote:
Unsure about your profile, Mikael. Ethernet would be a #2 by now, only
things like sat-links could still be #1s. So the work would really be to
I don't agree, wired ethernet is still #1 if you ask me.
figure out what to do with the varieties of your #2. My question is
rather whether IP over 802.11 should be operated like IP over Ethernet
or like IP over 802.15.4.
That is a good question.
The multilink subnet is not one /64 per wireless device as you indicate.
That model certainly works too, and was deployed, but with it, a set of
64 bits identifies and routes to a device, so we are mostly back to a
world of IPv4 with just DHCP (PD) and identifiers of 64 bits instead of
32.
The multilink subnet is a single large subnet encompassing the whole
ESS, Ethernet + Wi-Fi. It is really a Layer-3 ESS, based on the same
ideas as the Layer-2 is.
In that model, the association of a wireless device associates the IP
unicast and multicast addresses with the MAC address, and the AP acts as
a router and performs proxy ND over the Ethernet backbone on behalf of
the wireless devices. That way, the ND NS are never multicast over the
wireless. In practice, the association of IP addresses should be done as
part of ND, and that is what RFC 6775 does.
Ok, thanks for explaining what you meant in more detail. I think I got it
now.
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