Hi Fred,
The term EID bothers me too, but for a different reason. The function of an EID
varies depending upon your location with respect the interface that the EID
references. If you are behind the same ETR as the referenced interface, the EID
both locates and identifies the referenced interface. If you are not behind the
same ETR as the referenced interface, the EID only identifies the interface.
At this point, it would be painful to start using a new term. Probably the best
that we can do is to point out that the term EID might be a bit of a misnomer.
Ron
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On Behalf Of
> Templin, Fred L
> Sent: Tuesday, September 04, 2012 12:21 PM
> To: Noel Chiappa; [email protected]
> Subject: Re: [lisp] Adoption of draft-chiappa-lisp-architecture-01 and
> draft-chiappa-lisp-introduction-01
>
> I have long maintained that what LISP is calling "EID" is not really an
> identifier but rather names a (virtual) interface the same as any IP
> address. Therefore, if the node has multiple independent (virtual)
> interfaces to which LISP EIDs must be assigned, it is not possible to
> say that only one of them is the "identity" of the endpoint.
>
> RFC4838 illustrates my point, where it defines the term Endpoint
> Identifier (EID) as: "a name, expressed using the general syntax of
> URIs (see below) that identifies a DTN endpoint". RFC4838 recognizes
> that an endpoint may connect to multiple Internets (e.g., the
> terrestrial Internet as we know it today and an interplanetary Internet
> that may come into existence in the future) where each such Internet
> may maintain an independent routing and addressing system. Therefore,
> an IP address that is relevant in Internet A may have no relevance in
> Internets B, C, D, etc. and cannot therefore be considered the
> "identity" of the endpoint.
>
> With a namespace like URIs that have nothing to do with routing and
> addressing, it is natural to have a single URI identity for such a
> "multi-internetted" endpoint. So, an endpoint known as "xyzzy" in the
> terrestrial Internet would still be known as "xyzzy" in any other
> Internet it might happen to connect to.
>
> I'm not sure I have any specific recommendations relative to this, but
> just to observe that the LISP EID is really just an IP address that
> only necessarily has relevance within the terrestrial Internet. A true
> EID (e.g., in the spirit of
> RFC4838) would have to be taken from some "neutral" namespace that has
> nothing to do with routing and addressing.
>
> Fred
> [email protected]
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