IPv6 deployment in Thailand

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????????????????????? IPv6 ???????????
???????? ??????????? ????????????????????????????
???????????????????????????????????????? ?????? 5
??????? 2550 ?????????? ?????????? ????????
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Outline

• Background
• Need for a Larger Address Space
• IPv6 Key Characteristics
• IPv6 - Key drivers for Next Generation Ubiquitous
  Networking
• ?????????? IPv6
• ?????????????????? IPv6 (?? 2550 - 2553)

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The Internet Network layer

• Host, router network layer functions

Transport layer TCP, UDP
Network layer
Link layer
physical layer
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IP Addresses

• given notion of network, lets re-examine IP
  addresses

class-full addressing
class
1.0.0.0 to 127.255.255.255
A
network
0
host
128.0.0.0 to 191.255.255.255
B
192.0.0.0 to 223.255.255.255
C
224.0.0.0 to 239.255.255.255
D
32 bits
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IP datagram format

• how much overhead with TCP?
• 20 bytes of TCP
• 20 bytes of IP
• 40 bytes app layer overhead

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IPv6

• Initial motivation 32-bit address space
  completely allocated by 2008.
• Additional motivation
• header format helps speed processing/forwarding
• header changes to facilitate QoS
• new anycast address route to best of several
  replicated servers
• IPv6 datagram format
• fixed-length 40 byte header
• no fragmentation allowed

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IPv6 Header (Cont)
Priority identify priority among datagrams in
flow Flow Label identify datagrams in same
flow. (concept offlow
not well defined). Next header identify upper
layer protocol for data
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Other Changes from IPv4

• Checksum removed entirely to reduce processing
  time at each hop
• Options allowed, but outside of header,
  indicated by Next Header field
• ICMPv6 new version of ICMP
• additional message types, e.g. Packet Too Big
• multicast group management functions

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IPv6 Key Characteristics

• IPv6 Dramatically Increases Address Space
• Simplified Header Intended to Promote Flexibility
  and Functionality
• Improved Routing Offers More Efficient Movement
  of Information
• Enhanced Mobility Features Provide Seamless
  Connectivity
• Enhanced Configuration Capabilities Can Ease
  Aspects of Network Administration
• Enhanced Quality of Service Can Prioritize
  Information Delivery
• Enhanced Integration of IP Security Can Assist in
  Data Protection
• IPv6 Characteristics Can Contribute to More
  Advanced Communications and Applications

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?????? IPv6

• ??????????????????????????????????????????????????
  ? IPv4 ??????????????? IPv6 ???
  ??????????????????????????????????????????????????
  ???

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??????????????????????? (?? 2550 2551)

• ???????????????????????? IPv6 (IPv6 Excellence
  Center) ??????? 2550

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??????????????????????? (?? 2550 2552)

• ??????????????????????????????????????????????????
  ?????????????????? IPv6 ???
• ????????????????????? ?????? ??????? ICT, NECTEC
  ??? Uninet
• ??????????????????????????????????????????????????
  ????????????????????? IPv6 ???
• ????????????????????? ?????? ??????? ICT, ???.
  ??????? TOT, CAT ??? Telco ????????

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?????????????????????? (?? 2550 2553)

• ???????????????????????????????????????????? IPv6
  Address ????????????????????????????????? IPv6
  ???????? ?? 2553
• ????????????????????? ?????? ??????? ICT, ???.
  ??????? ISPs

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Thank you