In einer eMail vom 25.07.2010 17:02:40 Westeuropäische Sommerzeit schreibt [email protected]:
Researchers, I think we must not attack each other personally. Nor even each other's views. We need to find the best solution each of the design goals. Right. And all may stay relaxed if we agreed that all solutions can be developed concurrently/one after the other and that there is no reason to believe that ONE CHOSEN solution has to be picked (ILNP:-( whereas all the others have to give up. In a preceding email I pointed out that since RFC2547 all vendor-specific basics have been standardized to transport L3- and lower level information across a BGP network, of course for the initial intention of forming a VPN, but which may as well be exploited to support discovery of tight clusters of links and nodes as well as of disjoint clusters which will do IP forwarding by means of technologies W,X,Y,Z (LISP, ILNP, TARA,lvip). However there is some time pressure: inter-cluster tunnels rely on today's IPv4, i.e. any solution has to come in time prior IPv4 address space exhausts. Here we talk about identity/location split. Robin is against. Most but seem to be for. So with the identity/location split we encounter identifier uniqueness. Whether it has to be global/universal or just local. Some hesitate about this; others, like me, take universal uniqueness for natural. Natural is that perfect solutions (like creating and maintaining universal uniqueness) aren't natural. Next question: Uniqueness system is to be hierarchical or flat? Any arguments on flatness side? But there is a ready-made solution. Is it reliable? Are we going any further with this ambiguity? I propose this approach: Let's answer the questions the reverse way. 1. Hierarchical or flat uniqueness system? 2. Global/universal or just local uniqueness? 3. Shall we make identity/location split? Creating/maintaining is a matter of effort, and we may take advantage of what exists, even if things are imperfect (MAC, IP). Important is that we can straighten out clashes in case they seldomly happen. And there are many ways to do it (even good old telephone technology had perfect solutions for handling clashes)!. Toni, you should better question the hierarchy for the location. And also: It is not of any help to pick some tiny aspect (here the identifier's uniqueness) and to ignore the big issues - however I do appreciate your emails :-). Heiner
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