Ted,

>> the "flow-through" model as far as I can recall suffers from DHCP's general 
>> problem of dealing with multiple sources of information (think multihoming 
>> with separate CE routers), in addition you either need to build what's 
>> essentially a spanning tree of DHCP relays or you need some mechanism to 
>> discover the set of DHCP server(s). certainly do-able, but not quite out of 
>> the box.
> 
> Actually it doesn't suffer from this problem.   You just wind up getting a 
> prefix delegation per edge router, and when you get a delegation, you add 
> that edge router to the list of routers to which you will relay downstream 
> prefix delegation requests.   You do not need spanning tree because if you 
> reach the same router through two different paths, you will just get the same 
> delegation twice per DUID/IAID.
> 
> The reason homenet didn't go with this solution is essentially that HNCP has 
> a better feature set and is easier to make work in a homenet environment.
> 
> (To be clear, I am just explaining the prefix delegation model.   If Anima 
> doesn't want to do it that way, that's fine with me, just as it's fine with 
> me that homenet went with HNCP.)
> 

it isn't as obvious as you make it out to be. there is no point in us arguing 
over that here (we have had this exact argument previously), write a draft if 
you think the flow-through model is viable in a network with multiple edges and 
arbitrary topology.

cheers,
Ole
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