IPv6’s Features & Advantages مختصری در مورد IPv6

2. It’s Features & Advantages
Haghighi.ahmad@gmail.com

3. (IPv4) IP
Internet Protocol •
IP •
IP
IP •
Localhost = 127.0.0.1 •
( ) octet •
IP •
.
•
.
Localhost = 11011000.00011011.00111101.10001001
IP •

4. IPv4
8 bit 8 bit 8 bit 8 bit
IP =
multicasting

5. IPv6
IPv6 •
IP
IPv4 IP
IPv6 •
)
.(

6. IPv6
128-bit IPv6 Address
3FFE:085B:1F1F:0000:0000:0000:00A9:1234
8 groups of 16-bit hexadecimal numbers separated by “:”
Leading zeros can be
removed
3FFE:85B:1F1F::A9:1234
:: = all zeros in one or more group of 16-bit hexadecimal numbers

7. IPv6
16 bit 16 bit 16 bit 16 bit 16 bit 16 bit 16 bit 16 bit
IP =
=
340,282,366,920,938,463,463,374,607,431,768,211,456

8. #1) IPv6 provides a substantially larger
IP address space than IPv4

9. #2) IPv6 provides better end-to-end
connectivity than IPv4
• The most exciting applications to emerge in recent days are
peer-to-peer applications such as multi-player online games,
video-conferencing (streaming media), file sharing and VoIP.
• As mentioned earlier, the shortage of addresses caused by
IPv4 has been overcome to some extent by using NAT
How does IPv6 provide a solution?
IPv6 with its large address space no longer
requires NAT and can ensure true end-to-end
connectivity. This means peer-to-peer applications
like VoIP or streaming media can work very
effectively and efficiently with IPv6.

10. #3)IPv6 has better ability for
autoconfiguring devices than IPv4
• Whenever a node plugs in and wants to be part of a network, IP
address information and router information is required to properly
configure the node and get it running.
• In the past, when there were fewer devices and computers in a
network running IP, almost all of them were statically configured and
IP addresses were manually assigned.
How does IPv6 provide a solution?
• IPv6 offers automatic configuration and simple configuration
mechanisms. Known as plug-and-play autoconfiguration.
• IPv6 offers DHCPv6, which is an autoconfiguration similar to IPv4
DHCP and offers stateful address autoconfiguration
• IPv6 also offers stateless or serverless address autoconfiguration
• In stateless autoconfiguration, a host can automatically
configure its own IPv6 address and does not need any assistance
from a stateful address serve.

11. #4) IPv6 contains simplified Header
Structures leading to faster routing as
compared to IPv4
vers hlen TOS total length
identification flags flag-offset
20 TTL protocol header checksum
bytes
source address
destination address
options and padding
IPv4
vers traffic class flow-label
payload length next header hop limit
40 source address
bytes
destination address
IPv6

12. #5) IPv6 provides better security than
IPv4 for applications and networks
• Because of end-to-end model, IPv4 was designed with almost no
security in mind and assumes that the required security will be
provided at the end nodes.
• For example, consider an application such as email that may require
encryption services.
• Network Address Translation (NAT) and Network Address Port
Translation (NAPT) were used to provide some level of protection
against some of the threats mentioned above using methods such as
firewalls.
How does IPv6 provide a solution?
• In IPv6, IPSec is a major protocol requirement and is one of the
factors in ensuring that IPv6 provides better security than IPv4.
• IPSec contains a set of cryptographic protocols for ensuring
secure data communication and key exchange. The main
protocols used are:

13. #5) IPv6 provides better security than
IPv4 for applications and networks
1.Authentication Header (AH) protocol, which enables
authentication and integrity of data.
2.Encapsulating Security Payload (ESP) protocol, which enables
How authentication and integrity of data as well as privacy of data.
both does IPv6 provide a solution?
•3.Internet IPSec is a major protocol requirement and is onehelps to
In IPv6, Key Exchange (IKE) protocol. This protocol suite of the
initially set up and negotiate the securitybetter security than IPv4.
factors in ensuring that IPv6 provides parameters between two
•end points. It then alsoof cryptographic protocols for ensuring the
IPSec contains a set keeps track of this information so that
communication stays secure tilland key exchange. The main
secure data communication the end.
protocols used are:

14. #6) IPv6 gives better Quality of Service
(QoS) than IPv4
• The present IP uses a Datagram service to transfer packets of data
between point to point using routers
• The IPv4 packet header structure contains 20 bytes of data.
How does IPv6 provide a solution?
• QoS is given a special boost in the IPv6 protocol with the IPv6
header containing a new field, called Flow Label field.
• This ensures a high degree of QoS especially for peer-to-peer
applications like VoIP and other real-time applications.

15. #7) IPv6 provides better Multicast and
Anycast abilities compared to IPv4
• This multicast is useful when streams of information have
to be made available to a wide variety of connected
devices and not just one single destination.
• E.g. Relay audio data, video data, news feeds, financial
data feeds

16. #7) IPv6 provides better Multicast and
Anycast abilities compared to IPv4
Multicast in IPv4 is possible only on subnets and most Internet
routers are not configured to support IPv4 multicast.
For effective use of multimedia applications
it should be possible to address different
hosts, which belong in different subnets.
How does IPv6 provide a solution?
• IPv6 extends the multicasting capabilities of IPv4 by
offering a large multicast address range.
• IPv6 also improves dramatically on the concept of anycast
services, which is available, though in a very minimal
form in IPv4.
• In anycast services, packets are not sent to all the nodes
in the network but only to the nearest reachable
member.

17. #8) IPv6 offers better mobility features
than IPv4
Mobile devices, which can change their location but would like to retain
existing connections.
Mobile networks that provide mobility to a group of devices
Ad-hoc networking in which some of the devices stay connected to the
network or in the vicinity of the network only for the short duration of a
communications session

18. #8) IPv6 offers better mobility features
than IPv4
• Mobile IPv4 requires a special router in the location of the mobile node
to properly receive calls.
• Route optimization is available to mobile IPv4 only through an optional
set of extensions
How does IPv6 provide a solution?
• With IPv6, mobility support is mandatory by the use of
Mobile IPv6 (MIPv6).
• There is no ingress-filtering problem in Mobile IPv6
because the correspondent node uses the care-of address
as the source address.
• IPv6 through its large address space ensures that each
mobile device can have its own unique IP address.

19. #9) IPv6 offers ease of administration
over IPv4
With an IPv4 network,
all the work of
network renumbering
and assigning of new
address schemes
would have had to be
done manually.
How does IPv6 provide a solution?
1. IPv6 provides capabilities so that network renumbering
can happen automatically.
2. Multihoming technique:
In this simultaneous connections are established to two
ISPS. (There is more than one path from the host to the
destination.)

20. #10) IPv6 follows the key design principles of IPv4,
thereby permitting a smooth transition from IPv4.
• Using Dual IPv4/IPv6 Stack

21. Reference
1. www.ipv6.com
2. http://fa.wikipedia.org/wiki/ipv6
3. http://www.centralclubs.com/
ipv6-the-next-generation-networking-t58923.html