On Thursday 17 November 2011, James Knott wrote:
Rüdiger Meier wrote:
WTF The point was that you have only 256 ::/64 subnets. If you have 6000 users you can't give every user a whole ::/64. This fact would be even more than just a valid reason to give each of them less than ::/64.
The IPv4 Internet manages to get by with only 2^32 or about 4 billion addresses and some of those are reserved and not available for ISPs
Ok, I give up. Still don't know how you would do it but now I believe you could manage to give me /48 as a subnet of your /56.
to hand out. If every ISP handed out /64 subnets, then there would be enough for 2^61 subnets (only 1/8 of the IPv6 address space is currently allocated for public unicast addresses). That's 2^29 or 537 million times the entire IPv4 address range. That should be sufficient for quite some time. Even if /48 subnets are issued, there's still 2^45 or 2.5 x 10^13 of them.
Thanks for figuring out how to deal with powers 2! BTW have you known that there are only 12 mersenne primes within the entire IPv6 range? But 8 of them are already within the small IPv4 range! Amazing isn't it?
Thats 8192 times the number of IPv4 addresses. So, don't worry about running out of address space, if /64 subnets are handed out./56.
And morever if you can't give everybody a whole subnet then you probably want to restrict every user to a single IP because you as the ISP have to log the user/IP/time map. (At least in Germany you have to do this). Logging this map would be much harder if these 6000 users are using random adresses from the shared subnet.
Compare that to what happens now with IPv4 and NAT. The ISP cannot monitor each individual computer behind the NAT router, only the aggregate traffic from the router.
That's why they give different IPs to each customer and don't NAT you at all. You are NATing your machines. And you are responsible for everything your machines did on the net unless you can proof that it was your grandma.
Same thing with IPv6, just monitor all the traffic coming from the customer's router. I have a cable modem here. It has it's own IP address and a MAC address that's visible to my ISP. Either could be used for traffic monitoring in the same manner as currently done when someone uses NAT on IPv4. Further, giving a customer, who has more than one computer, a single address will require them to use NAT, which is not supported in IPv6.
Maybe your rubbish Windows 7 or Suse can't do that out of the box. But there is also NAT with IPv6 and there are even reasons why some people need it.
But I guess you still know better about the situation there and how it should be and how it should not be and how about Windows 7 at all and
Based on another note from Lew, it appears I was correct on that matter.
Lol, that's what I've expected to hear.
abusing the other admins of being incompetent.
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