On Nov 28, 2011, at 3:49 AM, Lorenzo Colitti wrote:

> On Fri, Nov 25, 2011 at 17:43, Mark Townsley <towns...@cisco.com> wrote:
> Before we decide that we must have an IGP, that it must be cryptographically 
> secured, and that we have to tackle key distribution for it, I'd like to take 
> a step or two back from the routing protocol part of the equation.
> 
> I'm not saying we need to secure the IGP. I'm saying that we need homenet 
> devices to know if they're "part of the same homenet" or not. This is 
> important for border detection, among other things.
> 
> One easy way to do this, if you have an IGP anyway, is to say that all the 
> devices that are part of the same IGP domain, (and thus share the same key), 
> are on the same homenet. It might - just - be possible for users to 
> understand that to "join the network" you need "the password for the 
> network". Then all you need to do is find a way to share a key.
> 
> This simple solution falls over if a device needs to be part of two homenets 
> at the same time, or if you want to merge two homenets.
> 
> Is that clearer now?

I think the confusion stems from the fact that people have different views on 
both the HOMENET security requirements and the associated security operations 
model. 

Acee 



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