RE: [RAM] Ramblings about "locator"
<louise.burness@bt.com> Mon, 18 June 2007 09:46 UTC
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Subject: RE: [RAM] Ramblings about "locator"
Date: Mon, 18 Jun 2007 10:45:02 +0100
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Thread-Topic: [RAM] Ramblings about "locator"
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A locator would be a point on a map - expressed in the same language as all other points on the map (x,y co-ordinates)? The map can be read to determine the route ? Louise -----Original Message----- From: Brian E Carpenter [mailto:brian.e.carpenter@gmail.com] Sent: 18 June 2007 09:12 To: Noel Chiappa Cc: ram@iab.org Subject: Re: [RAM] Ramblings about "locator" Noel, On 2007-06-15 14:50, Noel Chiappa wrote: > > From: Brian E Carpenter <brian.e.carpenter@gmail.com> > > > My original RAMble (sorry) ended thus: > > > Maybe the essential point is that a locator can at least in > > principle be mapped to topology and an identifier can't. > > My human-name can be mapped to a telephone number. My human-name is > not, however, a telephone number. An "identifier" can certainly be > mapped to a network location with the aid of the appropriate database, > just as a DNS name can be mapped to a network location. > > Maybe you're using the wrong word, and instead of "mapped" you really > meant something like 'directly related', or something like that, but > the problem is that that's a somewhat nebulous turn of phrase. Which > is why I previously suggested that nice gold-standard, > easily-comprehendable tests for 'does this name have location information embedded in it' are: Well, let me quote Schoch: >> At the time one wishes to communicate with a particular address, there >> will be some mechanism that will map an address into an appropriate >> route. >> >> The address (where something is) need not be bound to the route (how to >> get there) until this mapping takes place; the choice of an "appropriate" >> route may change over time. The thing is, Schoch didn't separate the loc and id aspects of addresses (after all, the whole point was a single logical addressing scheme for the whole catenet). So this issue we're discussing didn't arise. However, what he writes seems to me to apply to locators. > > - Do you have to get a new one when you move to a new location? > - Given two location-based names, can you tell, by comparing *just the > names*, whether they are 'close' to each other? > > Maybe someone else can come up with a snappy word/phrase which > clearly, cleanly and concisely embodies that very close relationship... > > > > A slightly different way to say it is that a locator is a handle for > > a route. > > No. My street address is not a handle (in any simple sense) for > directions to my house. Yes, with a lot of data (connectivity > information), and a certain amount of computing, it can be turned into > directions, but the relationship is not a simple one. True, but inside a RIB, a locator is definitely going to be what you use to find a route. Brian > > This was all quite clear a long time ago; see IEN-19, John Shoch, > "Inter-Network Naming, Addressing, and Routing", January 1978, now > finally available at: > > ftp://ftp.isi.edu/in-notes/ien/ien19.txt > > Everyone here should be familiar with what it has to say. > > Noel > _______________________________________________ RAM mailing list RAM@iab.org https://www1.ietf.org/mailman/listinfo/ram _______________________________________________ RAM mailing list RAM@iab.org https://www1.ietf.org/mailman/listinfo/ram
- RE: [RAM] Ramblings about "locator" jarno.rajahalme
- [RAM] Ramblings about "locator" Brian E Carpenter
- Re: [RAM] Ramblings about "locator" Marshall Eubanks
- Re: [RAM] Ramblings about "locator" Brian E Carpenter
- [RAM] Re: Ramblings about "locator" RJ Atkinson
- Re: [RAM] Ramblings about "locator" Noel Chiappa
- Re: [RAM] Re: Ramblings about "locator" Noel Chiappa
- Re: [RAM] Re: Ramblings about "locator" Dino Farinacci
- Re: [RAM] Ramblings about "locator" Dino Farinacci
- Re: [RAM] Re: Ramblings about "locator" RJ Atkinson
- Re: [RAM] Re: Ramblings about "locator" Joel M. Halpern
- Re: [RAM] Re: Ramblings about "locator" Dino Farinacci
- Re: [RAM] Re: Ramblings about "locator" Noel Chiappa
- Re: [RAM] Re: Ramblings about "locator" Noel Chiappa
- Re: [RAM] Re: Ramblings about "locator" RJ Atkinson
- Re: [RAM] Ramblings about "locator" Christian Vogt
- Re: [RAM] Re: Ramblings about "locator" Tony Li
- Re: [RAM] Re: Ramblings about "locator" Noel Chiappa
- Re: [RAM] Re: Ramblings about "locator" HeinerHummel
- Re: [RAM] Ramblings about "locator" Ved Kafle
- Re: [RAM] Ramblings about "locator" Brian E Carpenter
- Re: [RAM] Ramblings about "locator" Stig Venaas
- Re: [RAM] Ramblings about "locator" Noel Chiappa
- Re: [RAM] Re: Ramblings about "locator" Peter Sherbin
- Re: [RAM] Ramblings about "locator" Peter Sherbin
- Re: [RAM] Ramblings about "locator" Marshall Eubanks
- Re: [RAM] Ramblings about "locator" Brian E Carpenter
- RE: [RAM] Ramblings about "locator" louise.burness
- Re: [RAM] Re: Ramblings about "locator" Mikko Särelä