Rainsbrook

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====== IPv6 ======

Why there are no new IPv4 jokes? Because they're all exhausted! 


Just a messing about page for me. Addresses here are not mine.... Just random ones.


The Google Public DNS IPv6 addresses are as follows:

    2001:4860:4860::8888
    2001:4860:4860::8844


IPv6 addresses are 128 bits long, split up into groups of 16 bits which are represented by 4 Hexadecimal digits seperated by a : . Continous double octet groups with only 0000's can be replaced with :: .

An address is broken down into 3 parts, the Network Address, the Subnet Address, and the Device Address.

The Network Address is the first 48-bits of the address which is the first three blocks of four hex digits.

The Subnet address is the next group of 16 bits or one double octet.

The device address is unique to the host and comprises the rest of the ipv6 number, 64 bits or four blocks.


Example:-

Allocation split in to two large subnets.

^ Network Address\\ 48 bits  ^ Subnet\\ 16 bits  ^ Host Address\\ 64 bits  ^ Network\\ Length ^
| 2001:08B0:FF92 | 0000 | 0000:0000:0000:0000 | /48 |
| 2001:08B0:FF92 | 1000 | 0000:0000:0000:0000 | /52 |
| 2001:08B0:FF92 | 0100 | 0000:0000:0000:0000 | /56 |
| 2001:08B0:FF92 | 0010 | 0000:0000:0000:0000 | /60 |
| 2001:08B0:FF92 | 0001 | 0000:0000:0000:0001 | /64 |


Subnet Binary 1000-0000-0000-0000 = 0x8000 hex


===== Easy to remember addresses =====


<code>
$ ping6 2600::  <-Sprint

Google DNS
$ ping6 2001:4860:4860::8888 
$ ping6 2001:4860:4860::8844

$ ping6 2602:ffea:a::dead:beef


</code>