Hi Dow,
locator A locator is a name that has topological sensitivity at a given layer and changes if the point of attachment at that layer changes. By default, a locator refers to layer 3. It is also possible to have locators at other layers. Locators may have other properties, such as their scope (local or global (default)) and their lifetime (ephemeral or permanent (default)).It is this "point of attachment at that layer" phrase that is still problematic. If a host disconnects from one place on an ethernet segment and connects to another, it can still be reachable without changing it's IP address. Are you defining this as not changing the point of attachment (in terms of layer 3)?
_Exactly_. If you change ports on your local Ethernet switch, then you've only changed the L2 topology, and done nothing at all at layer 3.
Also, to say that that a locator changes when the point of attachment changes depends on the nature of the routing system. The locator could stay the same, and there could be a change to the routing state instead. So there are some "relative topological scope" types of considerations in "this locator-ness" check, but the definition above does not capture those.
I'd claim that by definition, that token then isn't a locator. It sounds again like a forwarding system that's doing flat routing on an identifier.
I think that this is mostly a matter of semantics. Since our concern is scalability, I don't think that flat routing is really all that interesting of a case anyway.
Tony _______________________________________________ rrg mailing list [email protected] http://www.irtf.org/mailman/listinfo/rrg
