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General IPv6 Topics => IPv6 Basics & Questions & General Chatter => Topic started by: jan101 on September 23, 2013, 06:56:42 PM

Title: iana ipv6 global unicast address space
Post by: jan101 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

Title: Re: iana ipv6 global unicast address space
Post by: cholzhauer 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.

Title: Re: iana ipv6 global unicast address space
Post by: jan101 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.

Title: Re: iana ipv6 global unicast address space
Post by: broquea 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.

Title: Re: iana ipv6 global unicast address space
Post by: jan101 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

Title: Re: iana ipv6 global unicast address space
Post by: broquea 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.

Title: Re: iana ipv6 global unicast address space
Post by: jan101 on September 23, 2013, 09:40:35 PM

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

Title: Re: iana ipv6 global unicast address space
Post by: jan101 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

Title: Re: iana ipv6 global unicast address space
Post by: cholzhauer on September 24, 2013, 09:47:51 AM

A bunch

See if this helps

http://serverfault.com/questions/426183/how-does-ipv6-subnetting-work-and-how-does-it-differ-from-ipv4-subnetting

Title: Re: iana ipv6 global unicast address space
Post by: snarked on September 24, 2013, 10:53:38 AM

Quote

So how many /32 can I get from /3?

2^29 = 536,870,912.