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Why do this example give me the feeling that we are arguing over sacrificing the functionality for the majority for a few special cases. The real problem is a long-term scalable private address solution. There are other WG(s) looking at that. - - kurtis - On torsdag, aug 7, 2003, at 03:54 Europe/Stockholm, Andrew White wrote: > A 'real life' deployment scenario. > > (a) I set up a local network. I currently have no ISP, but I want my > network to 'just work' out of the box. This network consists of > (initially) > three routers, plus other infrastructure. > > (b) Sometime later I decide I want internet connectivity, so I connect > to an > ISP. I add my ISP provided address to my network in addition to the > address/es that are there already. For argument's sake, let's say the > ISP > doesn't have IPv6 capability, so I use a 6to4 address. > > I do not want my internal addressing exposed outside the network, so I > filter my addresses. I do use the ISPs addresses for external > connectivity. > > (c+d) Meanwhile, my friend has done the same thing, except that his > ISP DOES > offer IPv6, so he has a 'real' IPv6 address. > > (e) We connect our two local networks together (either by VPN tunnel > or a > wireless link - doesn't matter). We can now send local traffic to each > other, and out either ISP. > > (f) Sometime later I disconnect my ISP, and we use just his ISP. > > (g) Sometime later I disconnect my network from his. > > (h) Sometime later I register with a new ISP, and get a new IPv6 > prefix. > > > Salient points: > > (1) At points (a), (c) and (g) we have networks that are standalone > and have > no connection to an ISP or the global internet. Further, the networks > in > (a) and (c) have never had such a connection. The users don't want to > have > to register to get an address that works. > > (2) In (b), the external (6to4) prefix is unstable. Many ISPs > allocate a > temporary IPv4 internet address, and change these frequently. > > (3) The set of global prefixes valid for the network changes over time. > (a) None > (b) #1 (my 6to4) > (e) #1 and #2 (friend's v6) > (f) #2 > (g) None > (h) #3 (my new v6) > > (4) The only 'reliable' address that the hosts in my network have is > the > local one they started with. > > This example is quite similar to Tony's research ship example, with the > possible caveat that a research ship might be big and organised enough > to > register with an ISP to get an address space plus connectivity they > never > intend to use. > > > Consequences: > > - I need some form of local addressing that is not dependent on anyone > or > anything connected to the global internet. > > - I need this local addressing unique enough that I can safely join my > network and my friend's network together and allow them to swap > prefixes. > > - I want hosts in my network to prefer my local address scheme when > talking > to other hosts in my network. I want hosts in my network to prefer > one of > the local schemes when talking to hosts in my friend's network (since I > don't want the packets to leave 'our' network). I want hosts in my > network > to prefer global addresses when talking externally. > > - I want my local addresses filtered at appropriate borders, preferably > without having to set it up myself. > > - The ISPs probably want my local addresses filtered too. > > > Looks suspiciously like the filtered local address proposal, doesn't > it? > > -- > Andrew White > -------------------------------------------------------------------- > 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] > -------------------------------------------------------------------- -----BEGIN PGP SIGNATURE----- Version: PGP 8.0.2 iQA/AwUBPzkYgaarNKXTPFCVEQJGPQCfQyCGGvUIDc62X8dV6GUgd6eec/sAoKX1 QpWklU58OMWlsP71UNC/j6Z0 =FArS -----END PGP SIGNATURE----- -------------------------------------------------------------------- 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] --------------------------------------------------------------------
