 


IPv6&+• IPv6& $"#IPv6*1   • )(/.- • ,-/%%'0 • 456! IPv6

IPv6 

20IPv6Google IPv62018 8 30 https://www.google.com/intl/ja/ipv6/statistics.html

IPv6Google IPv6
20188 30 IPv6 Google IPv6
2018 8 30 '*)4IPv61;• $!%3.NTT $KDDI#!&IPv6
":=+• MVNOIPv6:=
•

:=83 2 9

• (0CATV-,/IPv61;6 •

+5-,/IPv61;>6<7IPv6  201711
http://www.soumu.go.jp/main_sosiki/joho_tsusin/policyreports/chousa/ipv6_internet/02kiban04_04000217.html iOSIPv6
• 20166
• IPv6iOS  

IPv6"+$'%& 3 
• NTT NGN IPv6 IPoE!/  "+$'%& 3 5. 14• IPv6 (*&#)3
2•  IPv4 PPPoE,0IPv6 

IPv4  

IPv6
• IP
• IPv4

128   IPv6 
32 •  4• IP

296

IPv6 IPv4 " &# • '$ • IP  • !% • IPv6 IPv4 "  • IPv6 "  IPv6
• IPv4 "  IPv4  IPv4 IPv4

IPv4



IPv4  IPv6

IPv6  




IPv4



IPv4IPv6









IPv4 IPv6
IPv4

IPv6



IPv4





IPv6







!


2 
• IPv4IPv6- 3 $&"%• IPv4IPv6*14+65.

•  ' #!"•  ,/ • DNS0)2*(  


• dig a www.example.com.
• dig aaaa www.example.com.

IPv6
IPv4 ?2: IPv47>AB• 20.!%'8  -0

• 32 =*& 5)6• ,15$9@3

• IPv6+14<;1995#" RFC 1883
• RFC(/ '8%

IPv4S[`a?JIPv6YXJA• IPv4?J• CIDR (Classless Inter-Domain Routing)• NAT / NAPT

• RFC 1597(1994;)O" P %

• MZC_1./9*'V^$!+826IPv4(07-'Q
 <]B$ RUIP(07- `a$ % $• RFC 1597Address Allocation for Private Internets
• 35)4/IPv4(07-1994; #GK #& • IPv6JA=HBWI• Historical NATRFC 1631(1994;)O" P %• IPv4(07-`a?J\HBN>F CIDR=HBNE>F :IP(07-T@'LD 38/,6$)-IPv6/#641995"9*
•%IPv6:8'7,• 15 (3OS IPv6$2
,&.0 !+IPv4 IANA$ '()
• 20112
• IANA $ '() RIR(Regional Internet Registry)
IPv4 '()• APNIC : 2011
• RIPE NCC : 2012
• ARIN : 2014
• LACNIC : 2017* () "!RIR & * AFRINIC() #% 2016* (• iOSIPv6$#)

• NAT64+DNS64 "'!
• IPv6 only &%IPv4!

IPv6
IPv6   

IPv6

RFC 8200"Internet Protocol, Version 6 (IPv6)
Specification"

RFC 1883"Internet Protocol, Version 6 (IPv6)
Specification"

廃止 RFC 2460

廃止

反映

"Internet Protocol, Version 6 (IPv6)
Specification"

更新
RFC 5095"Deprecation of Type 0 Routing
Headers in IPv6"

RFC 1883 : 1995
RFC 2460 : 1998
RFC 8200 : 2017

RFC 5871"IANA Allocation Guidelines for
the IPv6 Routing Header"

RFC 6564"A Uniform Format for IPv6
Extension Headers"

RFC 7045"Transmission and Processingof IPv6 Extension Headers"RFC 7112

"Implications of Oversized IPv6Header Chains"

IPv6拡張ヘッダ関連RFC

RFC 5722"Handling of Overlapping IPv6Fragments"

RFC 6946"Processing of IPv6 "Atomic"
Fragments"

フラグメント関連RFC
RFC 6935"IPv6 and UDP Checksums for
Tunneled Packets"

UDPチェックサム関連RFC
RFC 6437"IPv6 Flow Label Specification"

フローラベル関連RFC IPv6
•RFC 8201 : Path MTU Discovery for IP version 6•
obsoletes RFC 1981•

RFC 6434 : IPv6 Node Requirements•
obsoletes RFC 4294

•RFC 8106 : IPv6 Router Advertisement Options for DNS Configuration•obsoletes RFC 6106

•RFC 8096 : The IPv6-Specific MIB Modules Are Obsolete••

obsoletes RFC 2452, RFC 2454, RFC 2465, RFC 2466

RFC 6724 : Default Address Selection for Internet Protocol Version 6 (IPv6)•

obsoletes RFC 3484•

RFC 6547 : RFC 3627 to Historic Status•
obsoletes RFC 3627•

RFC 6437 : IPv6 Flow Label Specification•
obsoletes RFC 3697•

RFC 7526 : Deprecating the Anycast Prefix for 6to4 Relay Routers•obsoletes RFC 3068, RFC 6732•

RFC 7084 : Basic Requirements for IPv6 Customer Edge Router•
obsoletes RFC 6204•

RFC 6177 : IPv6 Address Assignment to End Sites•
obsoletes RFC 3177•

RFC 8305 : Happy Eyeballs Version 2: Better Connectivity Using Concurrency•

obsoletes RFC 6555

RFC

;-RFC#7
•RFC 4861;- RFC 83192018$2()'• IPv6%=<&;- =<&*6•

 IPv6%=<&RFC 8200)'• IPv6%1/4:,+

• RFC 4861;- RFC 8425)' • IPv6%" ! 52

•IPv6.098;-3

IPv6IETF IPv6   

2016'IAB statement• https://www.iab.org/2016/11/07/iab-statement-on-ipv6/• 2016'11)7&IAB(Internet Architecture Board)IPv4-<
M@0* ( ;D/ *3• . #%"!$IPv4,+NL ;+C• RFC?>=HIPv4IPv6:J ;
• IPv4IPv6F(KB 8I M@2 (•IPv4,+NL 16 GEA45 79

6man• IPv6 Maintenance• IPv6('!

• #$ %"• RFC 8200 : Internet Protocol, Version 6 (IPv6) Specification• RFC 8201 : Path MTU Discovery for IP version 6• IPv6 Node Requirements (RFC 6434 bis)• &

v6ops• IPv6 Operations• IPv6 "   $• !#

• RFC 8305 : Happy Eyeballs Version 2: Better Connectivity UsingConcurrency• IPv6
&%NAT64,464XLAT


softwire• Softwires• IPv4 over IPv6IPv6 over IPv4
• DS-Lite6rdMAP-EMAP-T4rddhc• Dynamic Host Configuration• DHCPv6  

• DHCPv4    •  

• DHCPv6 RFC 3315 bis)•  


• 6lo : IPv6 over Networks of Resource-constrained Nodes• 6tisch : IPv6 over the TSCH mode of IEEE 802.15.4e• lpwan : IPv6 over Low Power Wide-Area Networks• homenet : Home Networking • IPv6*$(#&"'IPv6
3<   • 2/:87• 67:))-;

• 456%

•  ))91+

• 0.50.$ !: ,4