The correct expression for "locally-unique identifier" is "privately-unique 
identifier".
This privately-unique identifier, administered to be unique within a location 
scope, provides for identity/location separation in communications within that 
scope.
The privately-unique identifier, administered to be unique within a location 
scope, does not provide for identity/location separation in communications 
beyond that scope.

On Friday 25 June 2010 at 20:23:54 Tony Li sent:
> 
> >> A locally administered identifier is perfectly adequate for global 
> >> communications and other ILNP hosts can easily recognize it. 
> > 
> > Not without the assurance of the pursuing locator. Both the locator and the 
> > identifier make the uniqueness. 
> 
> 
> Again, the locally administered identifier is bound to a site.  Typically, a 
> site will have a number of locators.  
> 
> 
> >> The only difference is that the host cannot roam outside of its 
> >> administrative scope.  
> > 
> > So "locally administered" identifier is bound to its location: subnetwork, 
> > site. Where is the identity/location separation then?
> 
> 
> A locally administered identifier still provides seamless mobility within the 
> site, which is not without value.  Hosts wanting seamless mobility across 
> sites will need to use a global identifier. We suspect that the vast majority 
> of hosts to make use of a global identifier as a result, however, the local 
> identifier is part of the architecture so that those that have strong privacy 
> requirements can also participate.
> 
> Tony
> 
> 
> 


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