On Wed, Apr 02, 2003 at 03:37:25PM +0200, Jeroen Massar wrote: > Indeed 'just pick some random address' if you don't want to > be connected to the rest of the world. No need for SL. > Also E20 or a similar amount is peanuts compared to what it > would cost if you need to renumber your complete site. >
Think beyond corporate networks. SL does not lead to NAT but choosing random addresses *WILL*, consider: I setup an ad-hoc network using my laptop, wireless is 1 network and wired is a second, my laptop routes between them. There is no external connectivity and site-locals are deprecated so I pick a random prefix. Now somebody with a link to the wider world joins my network, since there is no guarantee that the prefix used on the ad-hoc network is not used on the internet you either have to nat outgoing traffic or re-number the network. You have repeatedly slated re-numbering, and it seems un-feasible in an ad-hoc network anyway so the only choice left is NAT. If the network was numbered using site-locals all you don't need to re-number, just advertise an additional prefix. Yes, applications would need to be made to use the global prefix, we need a way of enforcing this - a simple method could be that the O/S simply deprecates the site-local prefix. If you only consider that Site-locals will ever be deployed in a "normal" network then the deprecation question is easy (yes deprecate them), however I thought that one of the advantages of v6 was that it gives better support for the a-typical network. I dont think some organisation allocating private prefixes is viable either, ad-hoc means exactly that, I don't want to be manually entering my unique private prefix. How about using fec0:<MAC address>::/64? That gives a (probably) private network per interface, the only issue is that you wouldn't be able to aggregate them in a sizeable network - however I agree that site-locals shouldn't be used in such a scenario. :) Mike -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
