Hi Per, You wrote:
> Efforts to extend the life of v4 may fall on one simple issue. > What if we can't re-claim or reuse enough of the previously > assigned address-blocks to meet the markets demand for growth at > the customer edge? I agree. I can't say for sure what will happen. I believe there are good reasons to believe that commercial pressures will drive the adoption of a finer slicing and better management technique - map-encap - to make it technically possible without worsening the routing scaling problem. One that happens, I figure money and IP addresses will change hands quite merrily. > We may know how much of the space isn't announced to the DFZ or > otherwise have potential for reuse, but there's no data to > support that this actually will happen, even if all and any > constraints on routing were lifted. "Data" about the future is hard to come by! I have no data on how much address space existing holders would give up, but if the price was right, I am sure that quite a lot of space could be found. The idea is to find it in largish chunks, so that chunk can be a single advertised prefix split up among many - hundreds or maybe thousands - of end-user networks. I am not sure of the morality or legality of those with space now selling it. I am just saying that if there are folks clamouring for it with money to pay for it, then this is a good motivation for those with sparsely used space to consolidate their usage into a smaller patch and to vacate the rest. Maybe the vacant space goes back to the RIR, or maybe they sell it or rent it. I just think that at every point in time for a long while to come, it will be easier and more profitable to use IPv4 more intensively than try to get paying home and SOHO customers (or end-user networks) to do without IPv4 addresses and rely on IPv6 only - albeit with some IPv4 space for ALGs, NAT-PT, NAT64 etc. I wrote more on this: http://lists.arin.net/pipermail/arin-ppml/2008-June/011005.html and have discussed this notion on the RRG in previous months. I am not sure I convinced anyone, but it looks pretty likely to me. - Robin -- to unsubscribe send a message to [EMAIL PROTECTED] with the word 'unsubscribe' in a single line as the message text body. archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg
