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Author Topic: iana ipv6 global unicast address space  (Read 4873 times)

jan101

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iana ipv6 global unicast address space
« on: September 23, 2013, 06:56:42 PM »

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
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cholzhauer

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Re: iana ipv6 global unicast address space
« Reply #1 on: September 23, 2013, 07:46:59 PM »

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.
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jan101

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Re: iana ipv6 global unicast address space
« Reply #2 on: September 23, 2013, 07:53:18 PM »

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.
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broquea

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Re: iana ipv6 global unicast address space
« Reply #3 on: September 23, 2013, 09:07:32 PM »

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.
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jan101

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Re: iana ipv6 global unicast address space
« Reply #4 on: September 23, 2013, 09:13:24 PM »

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

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Re: iana ipv6 global unicast address space
« Reply #5 on: September 23, 2013, 09:32:25 PM »

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.
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jan101

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Re: iana ipv6 global unicast address space
« Reply #6 on: September 23, 2013, 09:40:35 PM »

Right. That's what I meant. I got it backward. Thx
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jan101

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Re: iana ipv6 global unicast address space
« Reply #7 on: September 24, 2013, 09:21:47 AM »

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

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snarked

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Re: iana ipv6 global unicast address space
« Reply #9 on: September 24, 2013, 10:53:38 AM »

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