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iana ipv6 global unicast address space

Started by jan101, September 23, 2013, 06:56:42 PM

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jan101

I read the IANA address space (http://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.xhtml) and it says that the  assignments are currently limited to the IPv6 unicast address range of 2000::/3. But then on http://www.iana.org/assignments/ipv6-unicast-address-assignments/ipv6-unicast-address-assignments.xhtml, I don't see any 2000 IPv6 addresses. Can somebody educate me on this? Thanks

cholzhauer

Under the 5th column it says allocated...that means the range has been delegated to someone.  The 4th column says whom it was allocated to.

jan101

I understand that. But my question is what happened to the address 2000::. What does it mean 2000::/3? What is the range? I am new to IPv6.

broquea

2000::/3 is the current pool of all of IPv6 that RIRs allocate out of. 2000::/32 specifically...I don't know who that is allocated to whois tools don't seem to return results. Teredo starts at 2001::/32, perhaps they set it as reserved somewhere.

jan101

2000::/3 is allocated out of 2000::/32. Correct? I am not sure I understand that. Thanks

broquea

No, 2000::/32 is allocated out of 2000::/3. Learn CIDR notation. /3 is the larger covering prefix, and /32 is a more specific portion out of that /32.

jan101

Right. That's what I meant. I got it backward. Thx

jan101

So how many /32 can I get from /3? What is the formula to get there? Thx


snarked

QuoteSo how many /32 can I get from /3?
2^29 = 536,870,912.