Hi,

I tried to raise this issue in the monday's meeting, but let me try to 
augement it a bit.

I have a concern that we're trying to solve all the possible problems with 
bridge-like ND-proxies. (After all, we're engineers and we like to solve 
the problems..)

But, I think we need to really consider whether we NEED or WANT to solve 
those problems.

- what's the applicability of bridge-like ND-proxy?
  * replace the "(consecutive) simple NAT boxes for home" deployment 
model?
  * a model applicable in scenarios where deploying a router would not 
work
  * an ability to expand a /64 over a few links of different L2 media in 
home (or similar networks)
  * single admin domain/trusted environment (where SEND doesn't matter)?

- what's the non-applicability of bridge-like ND-proxy?
  * building large ad-hoc networks
  * a mechanism to replace all of your Ethernet switches / bridges
  * a replacement for routers

(probably missed some but..)

Based on this, I have a very strong gut feeling that we're going into a 
very, very questionable direction if we want to implement e.g.:

 - spanning tree protocol (implying at least 3 boxes which are not 
connected in serial)
 - supporting multiple routers connected in different branches of the 
bridge mesh
 - *having to* support SEND in every case (sure, supporting SEND would be 
nice but if it's too much bother..)

I don't think it's the goal to emulate bridges as closely as possible, as 
bridges (or Ethernet switches) are generic devices.  I don't think we want 
this to be.

Of course, we could write a problem statemetn for ND proxies but Im not 
sure it's required.
  
-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings

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