15. “By 2015, 17% of global Internet users will
be IPv6, with 28% of new Internet
connections running the protocol.”
Gartner, Dec 2010
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16. The World is Changing
17%
419,000,000 Users
(based on 2011 data)
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21. Subnet Size
— Subnets should always be /64
— Many vendors assume 64 bit boundary
— 18.4 quintillion addresses per subnet
— Perspective:
— 31.5M seconds per year
— 2.4 B seconds in average lifetime
Interface IdentifierAddress Prefix
IPv6 Address
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23. Local Link Address
— Bound to local network
— Non routable
— Automatically configured
— Uses MAC address to create unique address
— Multi-homed devices use “Zones”
Local
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24. Unique Local
— Private within organization
— Similar to RFC 1918
— Routable within organization
— 40-bit pseudo-random number for uniqueness
— Stateful or Stateless allocation
— Can be tunnelled
Unique Local
Local
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25. Global Unicast
— Globally unique
— Public address space
— 42 Undecillion address available
— Prefix allocated by RIR/ISP
— Stateful or Stateless allocation
— Provides peer-to-peer connectivity
Global Unicast
Unique Local
Local
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27. Extension Headers
— IPv6 Uses simplified header
— Chains additional headers onto one another
— QoS, IPsec, TCP, UDP and other protocols implemented
as “extension” headers
— Protocol can be extended
— Future friendly
Version Traffic Class Flow Label
Payload Length Next Header Hop Limit
Source Address
Destination Address
IPv6 Header
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28. Neighbour Discovery
— Uses link layer for auto configuration of nodes
— Provides “plug-and-play” network functionality
— Performs:
— Router discovery
— Prefix discovery
— Address resolution
— Parameter discovery
— Duplicate address detection
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29. Path MTU Discovery
— Based on IPv4 feature present in many routers
— Functionality moved into core protocol
— IPv6 does not like fragmentation
— Right-sizes MTU for optimized transmission
— Performed dynamically
— Increased throughput
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30. Multicast
— Fundamental shift from IPv4’s broadcast mechanism
— Broadcast not part of IPv6
— Allows networks to scale larger than IPv4
— Puts emphasis on the router rather than the switch
— Can be used to discover services
— Used by DHCP6 and other protocols
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31. Mobile IP
— Documented in RFC 6275
— Allows forwarding of traffic from a “care of” address
— Maintains session when joining new networks
— Still experimental status
— Currently complicated to implement
— Will become more important as everything becomes
mobile
— LISP might be better alternative for some
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32. Quality of Service (QoS)
— Greater flexibility for managing QoS
— Implemented as an extension header
— Currently QoS in IPv6 is same as IPv4
— Has ability to provide better flow control
— Future implementations will utilize more effectively
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33. IPsec
— Part of core protocol
— Developed in conjunction with IPv6
— Applications to provide VPN functionality
— Implemented as extension header
— Changes security in IPv6
— Encrypt IPv6 tunnels
Saturday, May 19, 12
68. Special Offer for All Attendees
Attend Our Complimentary IPv6 Technical Seminar:
Getting Started with IPv6
‣Instructor-led 3-hour virtual seminar
‣Learn the basic concepts of IPv6
‣Lay the groundwork for IPv6 success
Watch your email for an invitation and voucher code to
redeem online during registration
Saturday, May 19, 12