Re: [Int-area] Continuing the addressing discussion: what is an address anyway?

Dino Farinacci <farinacci@gmail.com> Tue, 01 March 2022 19:54 UTC

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From: Dino Farinacci <farinacci@gmail.com>
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Date: Tue, 01 Mar 2022 11:54:35 -0800
Cc: Eliot Lear <lear@lear.ch>, "Int-area@ietf.org" <Int-area@ietf.org>, Dirk Trossen <dirk.trossen=40huawei.com@dmarc.ietf.org>
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To: Toerless Eckert <tte@cs.fau.de>
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Subject: Re: [Int-area] Continuing the addressing discussion: what is an address anyway?
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> For example: The use of locator/identifier in RFC6830 (LISP) i think is,
> to use the White Knight's terminology, only what an address is
> called by an xTR (or the LISP instance) but nothing more: It does not
> defining what the nature of the locator or identifier addresses are.

An identifier (i.e. EID) typically is static (can be dynamcially assigned) and is used by the transport layer and not routable by the underlay. A locator (i.e. RLOC) is an address, according to the definition that everyone understands today, is used in the outer header encapsulation and is routable by the underlay.

It is that simple, even though I made the description lengthy to be a bit more complete on their usage.

Dino