Transcript Ipv6 Ipv6 - Sumary What is Ipv6 ? Why will we use it ? Addressing

Ipv6
Ipv6 - Sumary
What is Ipv6 ? Why will we use it ?
●Addressing
●IPv6 packet
●IPv6 deployment
●
What is Ipv6 ? Why will we use it ?
90 % of Ipv4 addresses are used
Ipv6 vs Ipv4
The primary change from IPv4 to IPv6 is the
length of network addresses. IPv6 addresses are
128 bits long , typically written as 32 hex digits.
This gives a total of 2^128 or 3.4×10^38
addresses, enough to provide an IPv6 /48 network
block for every 10 square metres on earth.
Ipv6 - addresses
The addresses : IPv6 addresses are usually
composed of two logical parts: a 64-bit network
prefix, and a 64-bit host-addressing part, which is
often automatically generated from the interface
MAC address.
Ipv6 - addresses
2001:0DB8:0000:0000:0000:0000:1428:57ab
2001:0DB8:0000:0000:0000::1428:57ab
2001:0DB8:0:0:0:0:1428:57ab
2001:0DB8:0::0:1428:57ab
2001:0DB8::1428:57ab
Ipv4 to Ipv6
For standard IPv6 hexadecimal, the IPv4 address
192.0.2.52 translates into hexadecimal as
0xC0000234, and is thus converted to an IPv6
address as
0000:0000:0000:0000:0000:0000:C000:0234 or
::C000:234.
Ipv6 as hostname
http://[1fff:0:a88:85a3::ac1f:8001]/index.html
Ipv6 - packets
Ipv6 packets
The IPv6 packet is composed of two main parts:
the header and the payload.
The header is in the first 40 octets of the packet
and contains both source and destination
addresses (128 bits each), as well as the version
(4-bit IP version), traffic class (8 bits, Packet
Priority), flow label (20 bits, QoS management),
payload length (16 bits), next header (8 bits), and
hop limit (8 bits, time to live).
Ipv6 deployment
Since 2003 , society like France Telecom can
reserve there own Ipv6 network.
For example FT is : 2001:688::/32
Ipv6 - Deployment
Many devices in networks are already prepared to
receive the Ipv6 (cf : cisco networks)
Nerim or Free telecom , in France , sold high
bandwidth to society.