4 - IPv6迁移技术.pdf

文档介绍：从IPv4到IPv6的过渡技术
华宁
nhua@
CTO, BII Group
1
过渡技术的分类
•双协议栈(Dual Stack)
•隧道(Tunnel)
•协议翻译(Protocol Translation)
2 BII Group, China IPv6 Summit 2003
Hua Ning
双协议栈
Application
TCP/UDP
IPv4 IPv6
Driver
3 BII Group, China IPv6 Summit 2003
Hua Ning
双协议栈(举例)
interface 0/1
ip address
half-duplex
ipv6 address 3FFE:81B3:1:1::1/64 Cisco IOS (15)T
ipv6 enable
ipv6 nd ra-interval 30
!
C:\Documents and Settings\hn>ipconfig
Windows IP Configuration
adapter local connection:
Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . :
Mask . . . . . . . . . . : WindowXP+SP1
IP Address. . . . . . . . . . . . : 3ffe:81b3:1:1:40fb:a58:41e6:cf0d
IP Address. . . . . . . . . . . . : 3ffe:81b3:1:1:209:6bff:fee0:3240
IP Address. . . . . . . . . . . . : fe80::209:6bff:fee0:3240%4
Default Gateway . . . . . . . :
4 BIIfe80: Group,:230:94ff China IPv6:fee0:4ba2%4 Summit 2003
Hua Ning
隧道(Tunnel)
•手动配置隧道(Configured tunnel)
– v6 over v4, v4 over v6, v4 over v4, v6 over v6
– GRE tunnel
•自动隧道(Automatic Tunnel)
–将IPv4地址嵌入在IPv6地址中,利用这个
IPv4地址来决定隧道的源地址和目的地址
– 6to4, 6over4, ISATAP等
5 BII Group, China IPv6 Summit 2003
Hua Ning
手动配置隧道
•手动配置隧道后, IPv6网络将底层的IPv4网络
做为一条点到点的链路
•隧道的原点和终点必须支持IPv4/v6双协议
•可以在路由器和路由器,主机和路由器,主机
和主机之间设置
•隧道所在的IPv6链路MTU减少20个字节(假定
IPv4没有option字段),1500Æ1480
Transport Layer
Data Header IPv6 Header
Transport Layer
Data Header IPv6 Header IPv4 Header
6 BII Group, China IPv6 Summit 2003
Hua Ning
手动配置隧道(举例)
interface Loopback1
ip address
!
interface Tunnel103
description to VIAGINIE ******@
no ip address
ipv6 address 3FFE:81B0:FFFF:3::2/64
ipv6 enable
tunnel source Loopback1
tunnel destination
tunnel mode ipv6ip
Cisco IOS (15)T
7 BII Group, China IPv6 Summit 2003
Hua Ning
自动6to4隧道
FP (3bits) TLA (13bits) IPv4 Address (