VERSION 6 (IPV6)
PRESENTED BY:GANESH V. VADULEKAR
What’s an IP address?
An Internet Protocol address (or IP address)
is a unique 32-bit number that identifies the
location of your computer network.
It serves as your computer’s “street
address,” enabling other computers to find
out exactly where you are and deliver
information to you.
IP DATAGRAM HEADER
OPTIONS (if any) + PADDING
WHAT IS IPV6???
IPv6 is the sixth revision to the Internet
Protocol and the successor to IPv4.
It functions similarly to IPv4 in that it
provides the unique, numerical IP addresses
necessary for Internet-enabled devices to
However, it does sport one major difference:
it utilizes 128-bit addresses.
Who created IPv6?
The Internet Engineering Task Force (IETF)
The IETF is a large open international
community of network
designers, operators, vendors, and
researchers concerned with the evolution of
the Internet architecture and the smooth
operation of the Internet.
Its goal is to make the Internet work better.
Why is IPv6 a great
The key difference between IPv4 and IPv6 is
that IPv6 has significantly more address
A typical IPv6 address has 8 groups of four
letters and numbers separated by colons so
it looks like this:
IPv6 will enable the trillions of new Internet
addresses needed to support connectivity
for a huge range of smart devices .
What were Problems With
IPv4 has 32 bit addresses.
Maximum header length is 60 octets.
Maximum packet length is 64K octets.
Variable size header.
(Slower processing at routers.)
Lack of quality-of-service support.
Only an 8-bit ToS field, which is hardly used.
Problem for multimedia services.
IPv6: Distinctive Features
Header format simplification
Expanded routing and addressing capabilities
Improved support for extensions and options
Flow labeling (for QoS) capability
Auto-configuration and Neighbour discovery
Authentication and privacy capabilities
Simple transition from IPv4
Major Improvements of
No option field: Replaced by extension
header. Result in a fixed length, 40-byte IP
No header checksum: Result in fast
No fragmentation at intermediate nodes:
Result in fast IP forwarding.
IPv6 Header Format
128-bit IPv6 Address
8 groups of 16-bit hexadecimal numbers separated by “:”
Leading zeros can be
:: = all zeros in one or more group of 16-bit hexadecimal numbers
Advantages of IPv6 over IPv4
Larger address space
Better header format
Allowance for extension
Support for resource allocation
Support for more security
Support for mobility
Difference Between IPV4 & IPV6
Payload ID for QoS
in the header
Resolve IP address
to a link layer
Using Flow label
Both router and the
Only supported at
the sending hosts
IPv6 is NEW …
– built on the experiences learned from IPv4
– new features
– large address space
– new efficient header
… and OLD
– still IP
– build on a solid base
– started in 1995, a lot of implementations
and tests done