[lisp] I can find only one definition of "namespace"
Robin Whittle <rw@firstpr.com.au> Sat, 21 March 2009 15:40 UTC
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Date: Sun, 22 Mar 2009 02:43:07 +1100
From: Robin Whittle <rw@firstpr.com.au>
Organization: First Principles
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Subject: [lisp] I can find only one definition of "namespace"
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Apologies to anyone who breaks out in hives due to further mention of *NAMESPACE*! Hi Sam, In "Re: LISP WG: Loc/ID separation - not separate namespaces" http://www.ietf.org/mail-archive/web/lisp/current/msg00299.html you wrote, in part: > You've presented one definition of namespace. I strongly suspect > that there are a lot of other definitions floating around and that > the term was being used loosely. I have not seen a lot of support > for your strict definition of namespaces. I have done an extensive literature search http://www.firstpr.com.au/ip/ivip/namespace/ and found several entirely compatible definitions of "namespace" in the context of computer networking. The most comprehensive one was: http://en.wikipedia.org/wiki/Namespace_(computer_science) I found many instances of the term being used in RFCs and I-Ds which were consistent with this definition, going back to the early 1990s. The most notable document making frequent references (44 at least) to "namespace" in ways which entirely accord with the definitions I found, was Noel Chiappa in an unfinished draft of an I-D, which is nonetheless cited quite frequently: http://ana.lcs.mit.edu/~jnc/tech/endpoints.txt I found a few instances of usage of the term which I think were loose or incorrect, but that is normal and not suggestive of there being another, different, genuine meaning in the author's mind. I stand by my suggestion that it would be best to remove the term of "namespace" from: http://tools.ietf.org/html/draft-farinacci-lisp-12 http://tools.ietf.org/html/draft-lewis-lisp-interworking-02 and that the explicit statements about LISP creating separate namespaces for EIDs and RLOCs in an IETF Journal article are misleading as long as LISP is to be a practical solution to the routing scaling problem. In an earlier message I mentioned but did not link to a NANOG presentation in which the "separate namespaces" claim was also made: http://www.nanog.org/mtg-0710/presentations/LISP-cons.pdf That is old, not linked to from the LISP site and probably not read much. However statements about new namespaces are also made in two 2008 presentations which are linked from the LISP site: http://www.lisp4.net/docs/lisp-ripe-long.pdf Page 13 indicates that EIDs are a "new namespace". http://www.lisp4.net/docs/lisp-crc-aam-workshop.ppt Why Separate Location from ID? Level of Indirection allows us to: Keep either ID or Location fixed while changing the other Create separate namespaces which can have different allocation properties My page listed above links to 13 mailing list messages since July 2007 in which I raised concerns about inferences or statements regarding a practical core-edge separation system involving separate namespaces for EIDs and RLOCs. No alternative definition of "namespace" has yet been proposed. - Robin
- [lisp] I can find only one definition of "namespa… Robin Whittle
- Re: [lisp] I can find only one definition of "nam… Noel Chiappa
- Re: [lisp] I can find only one definition of "nam… Robin Whittle