RE: 6MAN Adoption call on raft-chakrabarti-nordmark-6man-efficient-nd-04

[Samita Chakrabarti <[e-mail]>]

Hi Erik,

Some explanation for  your comments below:


> Fundamentally, the main use case seems to be trying to merge two different link types.  One link type for low power nodes, one for "more traditional" nodes, if you will.
[SC>] 
[SC>]  The main usecase of the solution is to reduce multicast and do registration of nodes to the default routers.  It indeed helps wireless devices  not to waste energy on repeated multicast transmission/reception and wireless switches and Wifi-controllers to be more efficient  (due to reduced multicast messaging). Optionally it can do further support on mobility of wireless devices within a large area containing multiple default routers covering the same subnet. The registration, in turn helps reduce ND DOS problem as well as a by-product.

 > I think we have *routing* for this.  Merging what is really two different L2 types so that they can try to be one seemless L2 domain still doesn't feel right to me.
[SC>]  This document  does not talk about merging two different link types.   If you are referring to mixed modes section -- they are simply the use-cases for accommodating classic RFC4861 and the nodes that follow the registration method. 

The efficient ND simply allows many different types of devices ( cell phones, PDA, laptops, cameras, TV, wireless gadgets, servers, Routers etc.) to stay in same IPv6 subnet and communicate with each other more efficiently than today in IPv6. That's why we need this solution as the world is going toward IPv6 with wireless devices.

I think you have been confusing it with RFC6775(6lowpan-ND) - which is a different thing and allows multi-link subnets. 

Cheers,
-Samita