In einer eMail vom 10.06.2010 23:18:19 Westeuropäische Sommerzeit schreibt rja.li...@gmail.com:
B) An "Address" is an object that combines aspects of identity with topological location. IPv4 and IPv6 addresses are current examples. The postal letter address denotes a location (endpoint) to which the letter is to be delivered based on this address. Who will open the letter is a different subject. IPv4 and IPv6 addresses do not denote topological locations. We all know their historical and weird meanings and shouldn't ponder and wordsmith any further what "address" means. But the term Locator is not (yet) charged with false/misleading understanding. Therefore: C) A "Locator" is a structured topology-dependent name that is not used for node identification, and is not a path. Two related meanings are current, depending on the class of things being named: 1) The topology-dependent name of a node's interface. 2) The topology-dependent name of a single subnetwork OR topology-dependent name of a group of related subnetworks that share a single aggregate. An IP routing prefix is a current example of this last. A "Locator" is an attribute of a node which denotes its location. Locator-based forwarding means forwarding packets to that node which is denoted by the destination/egress-locator (without evaluating its current IP address which doesn't provide any topological location information). Locator values must be globally unique ( two different nodes must have two different locators). Therefore I agree saying that a "locator" is a structured topology de pendent name, but I strongly disagree with saying "that is not used for node identification". The endpoint of locator-based routing is still a node (similar to LISP's ETR), i.e. that router where Locator-based forwarding ends and where forwarding is continued classically. Heiner
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