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← Revision 11 as of 2016-12-30 07:56:39 ⇥
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| * While IPv4 has a fixed limit of around 4 billion IP addresses, IPv6 will have exponentially more, on the magnitude of around 340 billion billion billion billion (3.4×1038). | * 4 Types of adresses || Loopback || 00...1 (128 bits) || ::1/128 || || Multicast || 11111111 || FF00::/8 || || Link-Local unicast || 1111111010 || FE80::/10 || || Global Unicast || (everything else) || || * All hosts in IPv6 has the same link local subnet [[https://www.edge-cloud.net/2013/08/07/ipv6-link-local-addresses-as-default-gateway/|fe80::/10]] see [[https://tools.ietf.org/html/rfc4291|RFC4291]] * Thus we can use the same default GW on each host !!! '''fe80::1''' * While [[ipv4|IPv4]] has a fixed limit of around 4 billion IP addresses, IPv6 will have exponentially more, on the magnitude of around 340 billion billion billion billion (3.4×1038). |
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| As the 4 billion IPv4 addresses run out sometime early next decade (current estimates: 2011-2012), the Internet will stop growing if we do not find ways to tackle the exhaust. The successor to IPv4 - IPv6 - allows 340 undecillion addresses or more than 50 billion billion billion per person on earth. | As the 4 billion IPv4 addresses run out sometime early next decade (current estimates: 2011-2012), the Internet will stop growing if we do not find ways to tackle the exhaust. The successor to IPv4 - IPv6 - allows 340 undecillion addresses or more than 50 billion billion billion per person on earth. |
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IPv6
- 4 Types of adresses
Loopback
00...1 (128 bits)
::1/128
Multicast
11111111
FF00::/8
Link-Local unicast
1111111010
FE80::/10
Global Unicast
(everything else)
All hosts in IPv6 has the same link local subnet fe80::/10 see RFC4291
Thus we can use the same default GW on each host !!! fe80::1
While IPv4 has a fixed limit of around 4 billion IP addresses, IPv6 will have exponentially more, on the magnitude of around 340 billion billion billion billion (3.4×1038).
- Next gen ip protocol
As the 4 billion IPv4 addresses run out sometime early next decade (current estimates: 2011-2012), the Internet will stop growing if we do not find ways to tackle the exhaust. The successor to IPv4 - IPv6 - allows 340 undecillion addresses or more than 50 billion billion billion per person on earth.
PI - Provider independent IP block Importance for dual homing.
Address plan examples (2015)
- Only first half /64 used, last half of ipv6 is for host-ID
- Big company's may be issued with /32 IPv6 space.
- Best practice is to use /48 for a site, with /64 for individual subnet's.
- Two main chains of thought for sub-netting
- Regional, e.g. Country, Site, Building, allowing for summerisation
- Functional, e.g Function, Site etc. allowing for security rules based on a prefix mask.
/40 L1 |
/48 L2 |
/56 L3 |
/64 |
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