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On 24/11/10 15:40, Gordon Henderson wrote: > > Personally I feel that *we* ought to be hassling our ISPs and demanding > IPv6 *now* and not next year when we really do run out of IPv4 > addresses... We've been running out of IPv4 in the next few years for about a decade, and we will be running out for probably another decade. Last time I looked ICANN still had something like 14% of the address space in reserve, it claimed 10% start of this year, but that depends on what you mean by "unused" - i.e. whether it is a political decision or a practical one - ignoring bits allocated and unused, or underused. Note that ICANN isn't accounting for reserves in RIR, that is 14% of all possible usable blocks are either assigned to dead entities, reserved, or not yet assigned from ICANN. I know when one of my previous employers was taken over by one of the largest UK ISPs, the ISP was pleasantly surprised to find a computer consultancy with 30 employees had rather more IPv4 space than they did. Let us say early allocations were "generous" and inefficient, and it might well be easier to reclaim low hanging fruit here. > Afterall, IPv6 has only been going for 10 years, so it > really shouldn't be new to anyone. Given the number of broadband routers out there with no IPv6 support, it simply isn't happening for most broadband users. Do you see any practical benefits? I'm guessing that given most services you have to use a different URL to get IPv6 version of their website, and most clients machines are IPv4 only, that even with IPv6 client network and public addresses the main practical benefit will be no NAT for SIP to other clients of your own who do the same. As far as I can see the main practical benefit to me if I replace, or risk bricking my router (vendor looked blank when I asked for a copy of the original firmware - "just in case"), is I'll no longer have to switch IPv6 off to stop some services attempting it or doing IPv6 DNS lookups when the results won't work on my network. Oh and I'll have to check the network security in IPv6 (more carefully as NAT does kind of work as a poor man's firewall). -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq