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Presentation made at Karunya University, Karunya Nagar, Coimbatore, India on 3 Feb 2012.This presentation provides a summary of IPv6's main uses and main technical features.It also includes a primer on how the Internet is changing the world - taking the music industry as an example.
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Networking for the Future
Part 1: Why do we need IPv6?
Part 2: IPv6 – A Technical Primer
Part 3: Internet is changing the world
© 2009 Global Information Highway Ltd
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Dr. Olivier MJ Crépin-Leblond – ocl@gih.comKarunya University, Coimbatore, 3 February 2012
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What is an IP Address?
Domain Name: www.isoc.org
DNS Server
IPv4 Address: 212.110.167.157
Domain Names are identifiers
that you type in your Web
Browser, your E-mail etc.
DNS Servers translate this
Domain Name into an
address that is made up of
numbers
Every device that is
connected to the Internet
needs its Internet Protocol
(IP) address
translation
www.google.com
www.yahoo.com
© 2012 Global Information Highway Ltd
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We are running out of IPv4 addresses
� Each device (computer, phone etc.) connected to the Internet needs an Internet Protocol (IP) address.
� If we have 10 addresses only, how do we connect 11 computers?
We cannot do that.
� This is the point which we are about to reach.
“Internet Protocol”
© 2012 Global Information Highway Ltd
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We are running out of IPv4 addresses
When we reach this point, it will be too late since there will be no more free IP addresses!
Real time data collected 1 Mar 2010
today
© 2012 Global Information Highway Ltd
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We are running out of IPv4 addresses
When we reach this point, it will be too late since there will be no more “free” IPv4 addresses!
Real time data collected September 2011
http://www.potaroo.net/tools/ipv4/index.html
© 2012 Global Information Highway Ltd
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Current temporary solutions
An end user “pulls” the information to them from the network
Network Address Translation
© 2012 Global Information Highway Ltd
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How about Carrier Grade NAT?
� The Internet is based on a layered, end-to-end model that allows people at each level of the network to innovate free of any central control. By placing intelligence at the edges rather than control in the middle of the network, the Internet has created a platform for innovation.
Quotes – Vinton Cerf
US Scientist, widely known as one of the Fathers of the Internet
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The original Internet Architecture
© 2012 Global Information Highway Ltd
User-Centric Internet
Can be severalrouters at various“entry” points withresilient routes
Any connected device could be a “client” or a “server”
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The Internet Architecture Version 2
© 2012 Global Information Highway Ltd
User-Centric Internet
Local NAT
NAT = Network Address Translation
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Adding Carrier-Grade NAT
© 2012 Global Information Highway Ltd
CG-NAT CG-NAT
Single point of failureat Carrier Level
Server Only Client Only
The Network-CentricInternet
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Carrier Grade NAT
Network Address Translation
•Single point of failure•Need to use application-level filtering to inspect application protocol packets and modify them on the fly•Violates TCP states (usually performed by end nodes•Hard recovery for link flapping (multiple routes)
© 2012 Global Information Highway Ltd
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Carrier Grade NAT
•Hides complete parts of the DNS due to impossibility of connecting to specific host•Difficulty in establishing end to end VPN tunnels due to inability to connect to the “end”
•Major problem for people working from home or while travelling
•Any address translation might open the door to fake address translation and hacking thus potential security issues
© 2012 Global Information Highway Ltd
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Network Address Translation
© 2012 Global Information Highway Ltd
It is impossible to connect remotelyto an “internal” address
Internet Traffic
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Temporary solutions don’t work
In the future, communication will go both ways
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Future Solution – IPv6 everywhere
In the future, communication will go both ways
© 2012 Global Information Highway Ltd
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Future Solution – Internet everywhere
In the future, communication will go everywhere
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IPv6 examples
Emergency Alerts
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© 2012 Global Information Highway Ltd
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© 2012 Global Information Highway Ltd
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IPv6 examples
Smart Grid – greener use of energy
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The Smart Grid
Source: US National Institute of Standards & Technology
© 2012 Global Information Highway Ltd
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Infrastructure required for
telecommunications•Always connected Personal Digital Assistant:
•Mobile phone (Apple iPhone & iPad, Nokia, HTC etc.)
•Possibility to surf Web sites, but also use artificial intelligence for the digital assistant to automatically book tickets, shop, see pictures of area (like Google maps), to access remote cameras, and to find out about anything, anywhere. GPS location device with information about services. This is only addressable via IPv6!
•Law enforcement and civil protection
•Police can use all of these services, and more, to ensure the safety of the population. Firemen can coordinate information more easily. Ambulances and emergency services will know more information before arriving on scene.
•Always online - Everywhere
These are the applications of the
future
© 2012 Global Information Highway Ltd
Networking for the Future
IPv6 – a Technical Primer
© 2009 Global Information Highway Ltd
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Dr. Olivier MJ Crépin-Leblond – ocl@gih.com
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IPv6 Key Features
© 2012 Global Information Highway Ltd
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IPv4 and IPv6 Addressing
340,282,366,920, 938,463,463,374,607,431,
768,211,456
4,294,967,296 N°Addresses
2 x 10^1282 x 10^32N°Addresses
2001:0DB8:0123/48192.168.0.0/24Prefix Notation
Hexadecimal Notation
2001:0DB8:0123:4567:89AB:CDEF:0123:45
67
Dotted Decimal Notation
192.168.0.1
Address Format
128 Bit32 BitAddress Size
19991981Deployed
Internet Protocol IPv6Internet Protocol IPv4
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IPv4 and IPv6 Addressing
4,294,967,296
340,282,366,920,938,463,463,374,607,431,768,211,456
IP Version 4
IP Version 6
© 2012 Global Information Highway Ltd
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IPv6 Space
IPv4: 4,294,967,296 addresses
IPv6: 340,282,366,920,938,463,463,374,607,431,770,000,000 possible addresses
50,000,000,000,000,000,000,000,000,000 addresses per human
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Differences between IPv4 & IPv6
ManyUsually 1IP Addresses per interface
No NATBroken by NATPeer to Peer comm.
Mobile IPv6 MobilityExtensionMobility
Many more methodsManual or DHCPAddress Allocation
ExtendedBasicQuality of Service
IPSEC (Originally) Mandatory
IPSEC OptionalSecurity
2 x 10^1282 x 10^32N°Addresses
128 Bit32 BitAddress Size
Internet Protocol IPv6
Internet Protocol IPv4
© 2012 Global Information Highway Ltd
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Overall Packet Structure
Link Layer Trailer
Application Protocol DataTransport Header
IP Header
Link Layer Header
© 2012 Global Information Highway Ltd
FiberPhysical
EthernetLink Layer
IPProtocol
TCP, UDP,…Transport
HTTPApplication
HTMLPresentation
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Packet Structure / Datagram
Link Layer Trailer
Application Protocol DataTransport Header
IP Header
Link Layer Header
© 2012 Global Information Highway Ltd
FiberPhysical
EthernetLink Layer
IP (v4 or v6)Protocol
TCP, UDP,…Transport
HTTPApplication
HTMLPresentation
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IPv4 and IPv6 Addressing© 2012 Global Information Highway Ltd
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Streamlining of IPv6
� Fewer fields in the packet header
� Fixed size header- 40 octets (or bytes)
� No fragmentation in network
� No checksum processing
� Packet can be switched by flow label (Quality of Service possibility)
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No checksum Processing
© 2012 Global Information Highway Ltd
FiberPhysical
EthernetLink Layer
IPv6Protocol
TCP, UDP,…Transport
HTTPApplication
HTMLPresentation
Checksum: YES
Checksum: YES
Checksum: NO
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IPv6 Header Fields© 2012 Global Information Highway Ltd
Version
4 bits long
IP Version = 4 for IPv4= 6 for IPv6
Traffic Class
8 bits long
Quality of Service Techniques:
Diffserv Code Points (DSCP)Congestion Notification (ECN)Called “Type of Service in IPv4
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IPv6 Header Fields© 2012 Global Information Highway Ltd
Flow Label
20 bits long
Specific per flow processing of data Streams. This supports real-time datagram delivery and quality of service (QoS).Routers between the source and destination would treat traffic with the same datagram in a similar way.
For example, similar/minimal latency to Video packets.
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IPv6 Header Fields© 2012 Global Information Highway Ltd
Payload Length
16 bits long
In IPv4: Total Length field
This is the size of the inner datagram, after the basic header (which itself is 40 bytes long).
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IPv6 Header Fields© 2012 Global Information Highway Ltd
Next Header
8 bits long
Identification of Inner datagram
This serves the same purpose as the IPv4 “Protocol Field”, the identifying of data inside the payload of the IP datagram.
Codes are however extended to include the processing of options for Extension Headers(described later).
Hop Limit
8 bits long
Maximum Number of hops
In IPv4 this was called “TTL = Time to Live” and decreased at each hop.In IPv6 it is appropriately called
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IPv6 Header Fields© 2012 Global Information Highway Ltd
Source and Destination
128 bits long
These are the Source and the Destination of the datagram.
The Source IP address is the originator of the datagram i.e. The device that originally sent the packetThe Destination IP address is the intended recipient of the packet i.e. the ultimate destination. Valid for Unicast, Multicast or Anycast
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IPv6 Extension Headers© 2012 Global Information Highway Ltd
58ICMPv6 (like IPv4 “protocol” field)Upper Layer
17UDP (like IPv4 “protocol” field)Upper Layer
6TCP (like IPv4 “protocol” field)Upper Layer
59No Next Header(end)
135Mobility Header9
60Destination Options8
50Encapsulation Security Payload7
51Authentication Header6
44Fragment Header5
43Routing Header4
60Destination Options & Routing3
0Hop-by-Hop options2
-Basic IPv6 Header1
Next Header Code
Header TypeOrder
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IPv6 Extension Headers© 2012 Global Information Highway Ltd
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IPv6 Extension Headers© 2012 Global Information Highway Ltd
A few more examples of daisy-chained extension headers
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IPv6 Address shortening
2001:0DB8:0000:ABCD:0000:0000:0012:3456
2001:0db8:0000:abcd:0000:0000:0012:3456
2001:db8:0:abcd:0:0:12:3456
2001:db8:0:abcd::12:3456
© 2012 Global Information Highway Ltd
•Letters are case insensitive•Leading zeros in a field are optional•Successive fields of zeros
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IPv6 Addressing
•Addresses have scope•Interfaces can have multiple addresses•Addresses have lifetime
2001:0DB8:0000:ABCD:0000:0000:0012:3456
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IPv6 Addresses have scope
2001:0DB8:0000:ABCD:0000:0000:0012:3456
© 2012 Global Information Highway Ltd
Global Unique Local Link local
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IPv6 Type of Addresses
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IPv6 Host addresses
© 2012 Global Information Highway Ltd
Loopback address (used by the machine):0000:0000:0000:0000:0000:0000:0000:00010:0:0:0:0:0:0:1::1 ( this is like 127.0.0.1 in IPv4)
Unspecified: (used to define the default route)0:0:0:0:0:0:0:0::
This address is mandatory
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IPv6 Link Local
© 2012 Global Information Highway Ltd
Link Local addresses are mandatory and start with fe80::They work only on the Link Layer and cannot be forwarded by a router. Their function is key to the automatic configuration of a host without a router or DHCP server. Just connect the hosts & bingo!Start: fe80::End: febf:ffff:ffff:ffff:ffff:ffff:ffff:ffff
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IPv6 Global Unicast
© 2012 Global Information Highway Ltd
Global Unicast current assignment:
Start: 2000::End: 3fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
6to4 is a transition mechanism where IPv6 packets transit globally via IPv4.It has its own prefix 2002 with the rest of the address structure being slightly different
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IPv6 Multicast
© 2012 Global Information Highway Ltd
Global Multicast current assignment:Start: ff00::End: ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
Field starts with ff<LS> where L and S are as follows:L = 0 for permanent group / 1 for temporary groupS = Scope bit: 1 - Interface; 2 – Link; 4 – Admin; 5 – Site; 8 = Organization; E = GlobalAll others: unassigned or reserved
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CIDR Blocks in IPv6
� CIDR is principally a bitwise, prefix-based standard for the interpretation of IP addresses. It facilitates routing by allowing blocks of addresses to be grouped into single routing table entries.
� It is used in IPv4 and in IPv6
� Since IPv6 have scope, it is particularly helpful to use CIDR
Global Unique Local Link local
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CIDR Blocks in IPv6© 2012 Global Information Highway Ltd
2001:0db8:0000:abcd:0000:0000:0012:3456
|||| |||| |||| |||| |||| |||| |||| ||||
|||| |||| |||| |||| |||| |||| |||| |||128 /128 Single end-points and
loopback
|||| |||| |||| |||64 /64 Single end-user LAN subnet (required prefix size
for stateless address autoconfiguration (SLAAC))
|||| |||| |||| ||60 /60 Some (very limited) 6rd deployments
|||| |||| |||| |56 /56 recommended Minimal end-site assignment
|||| |||| |||48 /48 recommended Typical assignment for home sites
|||| |||| 36 /36 possible future local Internet registry (LIR) extra-small
allocation
|||| |||32 /32 LIR minimum allocation
|||| ||28 /28 LIR medium allocation
|||| |24 /24 LIR large allocation
|||| 20 /20 LIR extra large allocation
||12 /12 Allocation to regional Internet registry by IANA[12]
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CIDR Blocks in IPv6© 2012 Global Information Highway Ltd
2001:0db8:0000:abcd:0000:0000:0012:3456
|||| |||| |||| |||| |||| |||| |||| ||||
2001:0db8:0000:abcd:0000:0000:0012:3456/128 /128 Single end-points and
loopback
2001:0db8:0000:abcd/64 /64 Single end-user LAN subnet (required prefix size
for stateless address autoconfiguration (SLAAC))
2001:0db8:0000:abc/60 /60 Some (very limited) 6rd deployments
2001:0db8:0000:ab/56 /56 recommended Minimal end-site assignment
2001:0db8:0000/48 /48 recommended Typical assignment for home sites
2001:0db8:0/36 /36 possible future local Internet registry (LIR) extra-
small allocation
2001:0db8/32 /32 LIR minimum allocation
2001:0db/28 /28 LIR medium allocation
2001:0d/24 /24 LIR large allocation
2001:0/20 /20 LIR extra large allocation
200/12 /12 Allocation to regional Internet registry by IANA[12]
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Multicast Addresses
DescriptionScopeAddress
Network Time Protocol (NTP)ff0x::101
Multicast DNSff0x::fb
DHCP Servers on the local net siteSiteff05::1:3
All DHCP routers on the local net siteSiteff05::1:2
PIM RoutersLinkff02::d
EIGRP RoutersLinkff02::a
RIP RoutersLinkff02::9
OFPF v3 Designated RoutersLinkff02::6
OSPF v3 SFP RoutersLinkff02::5
All routers on the linkLinkff02::2
All nodes on the linkLinkff02::1
All routers on the nodeInterfaceff01::2
All interfaces on the nodeInterfaceff01::1
© 2012 Global Information Highway Ltd
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Unicast vs. Multicast
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© 2012 Global Information Highway Ltd
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Anycast Addresses
� This is used to send a packet to multiple nodes which are not necessarily on the same subnet
� An Anycast address is the same Unicastaddress configured on multiple nodes:
� The routers will deliver the packet to the nearest node member of the Anycast group
� Currently used with DNS servers
© 2012 Global Information Highway Ltd
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Anycast Addresses
3ffe:b00:1::5
3ffe:b00:1::5
3ffe:b00:1::5Routers know whereto route this data
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Many addresses on one node
On each interfaceMay be joinedMulticast groupany
For each multicast and any anycastaddress defined
Must be joinedSolicited node Multicast
1
On each interfaceMust be joinedAll-nodes Multicast1
On each interfaceMay be definedUnique-Localany
On each interfaceMay be definedUnicasts0 to many
On each nodeMust be definedLoopback (::1)1
On each interfaceMust be definedLink local (fe80::)1
ContextRequirementAddressQuantity
© 2012 Global Information Highway Ltd
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IPv6 Multihoming2a00:19e8:10::3
2001:db8:abcd::3
2001:db8:abcd::/48
Site: 2a00:19e8:10::/48
2001:db8:::/322a00:19e8::/32
2a00:19e8:10::/48
2001:db8:abcd::1
2a00:19e8:10::12001:db8:abcd::/48
2a00:1
9e8:10
::/48
2001:db8:abcd::/48
2001:db8:abcd::2
2a00:19e8:10::1
Low Pref.Low
Pref.
High Pref.High Pref.
2001:db8:abcd::/48
2001:db8:abcd::2
2001:db8:::/32
2001:db8:abcd::/48
2001:db8:abcd::2
2001:db8:abcd::/48
2001:db8:::/32
2001:db8:abcd::/48
2001:db8:abcd::2
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Obtaining IPv6 addresses
� Manual setting up of IPv6 address. This is similar to IPv4
� 2 auto-configuration mechanisms in IPv6:
� Stateless: SLAAC (Stateless Address Auto-Configuration), based on ICMPv6 messages (Router Solicitation and Router Advertisement)
� Stateful: DHCPv6
� SLAAC is mandatory, while DHCPv6 is optional
� DHCPv6 works differently to IPv4 DHCP
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Stateless Address Auto-Configuration
� In SLAAC, constant “Router Advertisements” communicate configuration Information such as: � IPv6 prefixes to use for autoconfiguration� IPv6 routing information � Other configuration parameters (Hop Limit, MTU, etc.)
� This information is used, along with the Ethernet Unique Identifier (Eui64) address (and other information, in some cases), to create IPv6 addresses for the node
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Making up an Eui-64 address
© 2012 Global Information Highway Ltd
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IPv6 Address Allocation
2001:db8:abcd::3
2001:db8:abcd:: + Eui-64fe80::290:27ff:fe17:fc0f2001:db8:abcd::290:27ff:fe17:fc0f
Manually allocated
Link-LocalRouter Advertisement
Site Prefix:2001:db8:abcd::/48
MAC: 00:90:27:17:FC:0FEui-64: 02 90 27 FF FE 17 FC 0F
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RA message withNetwork typeinformation
DAD = Duplicate Address Detection
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IPv6 Dynamic Naming System
� Quite similar to IPv4 DNSQuite similar to IPv4 DNSQuite similar to IPv4 DNSQuite similar to IPv4 DNS
� Forward DNSForward DNSForward DNSForward DNS
host1.example.com IN Ahost1.example.com IN Ahost1.example.com IN Ahost1.example.com IN A 192.168.0.2192.168.0.2192.168.0.2192.168.0.2
host1.example.com IN AAAAhost1.example.com IN AAAAhost1.example.com IN AAAAhost1.example.com IN AAAA 2001:db8:0:abcd::12:34562001:db8:0:abcd::12:34562001:db8:0:abcd::12:34562001:db8:0:abcd::12:3456
� Reverse DNSReverse DNSReverse DNSReverse DNS
1.0.160.192.in1.0.160.192.in1.0.160.192.in1.0.160.192.in----addr.arpa IN PTR host1.example.comaddr.arpa IN PTR host1.example.comaddr.arpa IN PTR host1.example.comaddr.arpa IN PTR host1.example.com
6.5.4.36.5.4.36.5.4.36.5.4.3....2.1.0.02.1.0.02.1.0.02.1.0.0....0.0.0.00.0.0.00.0.0.00.0.0.0....0.0.0.00.0.0.00.0.0.00.0.0.0....d.c.b.ad.c.b.ad.c.b.ad.c.b.a....0.0.0.00.0.0.00.0.0.00.0.0.0....8.b.d.08.b.d.08.b.d.08.b.d.0....1.0.0.21.0.0.21.0.0.21.0.0.2....
....ip6.arpaip6.arpaip6.arpaip6.arpa
Tools exist to write the reverse DNSTools exist to write the reverse DNSTools exist to write the reverse DNSTools exist to write the reverse DNS
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Mobility / Mobile IP
� IPv4 already had extensions called IPv4 mobility
� IPv6 has similar extensions that are a lot more developed than the IPv4 equivalent since they run on IPv6.
© 2012 Global Information Highway Ltd
New ICMPv6 (Internet Control Message Protocol)
New Neighbour Discovery
New home address option for destination header
New extended routing header
New mobility options to include in mobility signalling
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Mobility / Mobile IP
HomeAgent
Correspondent Node
Mobile NodeAt home
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Connects toMobile NodeAt Home
This is a router
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Mobility / Mobile IP
HomeAgent
Correspondent Node
Mobile NodeAt home
Mobile Node
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Tells Home Agentwhere it is
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Mobility / Mobile IP
HomeAgent
Correspondent Node
Mobile Node
© 2012 Global Information Highway Ltd
Tells Home Agentwhere it is
Home Agentforwards packetsTo Mobile Node Mobile Node
answers directlyBack to Correspondent
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Mobility / Mobile IP
HomeAgent
Correspondent Node
Mobile Nodeat home
Mobile Node
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Mobile Node
The use of ICPMv6as well as other features of IPv6allows for fasterroaming and morefeatures in IPv6Mobile IP.
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IPSec on IPv6: end to end security
© 2012 Global Information Highway Ltd
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Transition Security Problem Example
IPv4 or IPv6Address spoofing
© 2012 Global Information Highway Ltd
Networking for the Future
Internet is changing the world
© 2009 Global Information Highway Ltd
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Internet is changing the business world
� New business models� Google� Amazon.com� Skype (development in Estonia)� iTunes� youTube� Open Source Software� Mobile application download ($1 app)
� New community spaces� Facebook (500+ million users)� MySpace� Google+
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Internet is changingthe business world
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The power of Developers
� The key to IPv6 success will be developers
� New services
� New applications
� The ubiquitous network
� Always on
� Everywhere
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Internet is changing the business world
� A recent Boston Consulting Group report commissioned by Google estimated the United Kingdom’s Internet economy:
� is worth £100 billion a year,
� is growing at 10% a year, and
� directly employs 250,000 people.
� 7.2% of UK Gross Domestic Product (GDP)
� Source: http://www.connectedkingdom.co.uk/
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Internet is changing the business world
Source: http://www.connectedkingdom.co.uk/
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Don’t be afraid of change!
� Horse drawn carriages are history
� Today there’s a systemic barrier to the Internet’s Growth
� Laws and processes are designed to safeguard what is currently in place
� Baggage which, in some cases, will have to be changed
� Otherwise? The market will dictate change and it will find opportunities elsewhere
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So what needs to be done?
� The Internet Train is here. Do not miss it.
� It will continue to grow and if you are not ready, business will go elsewhere
� Get ready for IPv6 – the next network addressing
� Get ready for new technologies and promote them
� Engage in multi-stakeholder processes: ICANN, IETF, W3C etc.
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World IPv6 Launch
� Major Internet service providers (ISPs), home networking equipment manufacturers, and web companies around the world are coming together to permanently enable IPv6 for their products and services.
� Target: 6 June 2012
� http://www.worldipv6launch.org
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Click to add title
Click to add text
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So what should you avoid?
Networking for the Future
Thank You / Questions ?
© 2009 Global Information Highway Ltd
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With thanks to Dr. Alaa AL-Din AL-Radhi for some visuals.
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