文档介绍：IPv6 技術理論與實務研習班 IPv6 Addressing
Content
Introduction
IPv6 Addressing
IPv6 Header
ICMPv6
Neighbor Discovery
Address Autoconfiguration
Addressing Allocation Policy
Global IPv6 actions
2
Content
Introduction
IPv6 Addressing
IPv6 Header
ICMPv6
Neighbor Discovery
Address Autoconfiguration
Addressing Allocation Policy
Global IPv6 actions
3
IPv4定址
IPv4以32bit來做定址空間
共四十億個IPv4位址可用
IPv4定址架構(classfull)如下
001 - 126 = Class A
128 - 191 = Class B
192 - 223 = Class C
224 - 239 = Class D
240 - 254 = Class E
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Problems with IPv4(1/2)
Address depletion/ exhaustion and its implications
NAT (Network Address Translation)
CIDR
IPv4 address allocation rate
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Problems with IPv4(1/2)
Scaling problems with Inter- domain routing
CIDR (Classless Inter-Domain Routing)
Manual configuration required
DHCP (Dynamic Host Configuration Protocol)
Multicast, Security, Quality of Service and Mobility
IP multicast, IPSec, DiffServ and IP mobility
Header and format limitations that limit future flexibility
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NAT
Network Address Translation allows a site to use private addresses behind a NAT gateway/ firewall municating locally,
and then automatically get a global IPv4 address assigned from a smaller pool when needed for munication,
which requires changing the IPv4 header’s source address on the fly, which has a few problems...
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Potential IPv6 Services
Broadband Access Subscribers
95% FTTH coverage by 2008
6 millions by 2008
3G and WLAN Services
3G services to be launched in 4Q 2003
Public Hotspots deployment plan to make Taiwan a “Wireless Island
work and IA Services
e-Taiwan Projects will catalyze the development of home & IA
More IP addresses will be consumed
2. More advanced features (. Mobility, Auto-configuration, QoS, Security) will be required
IPv6
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Content
Introduction
IPv6 Addressing
IPv6 Header
ICMPv6
Neighbor Discovery
Address Autoconfiguration
Addressing Allocation Policy
Global IPv6 actions
9
Address Notation
以16進位