配置靜态IPV6 NAT-PT

一.概述：

IPV6 NAT-PT( Network Address Translation - Port Translation)應用與ipv4和ipv6網絡互訪的情況，根據參考連結配置時出現一些問題，是以記錄下來。

參考連結：

<a href="http://www.cisco.com/en/US/tech/tk648/tk361/technologies_configuration_example09186a0080b9a911.shtml" target="_blank">http://www.cisco.com/en/US/tech/tk648/tk361/technologies_configuration_example09186a0080b9a911.shtml</a>

---配置有些小錯誤：ipv4接口沒有敲ipv6 enable；ipv6接口沒有敲ipv6 nat

<a href="http://blog.sina.com.cn/s/blog_5ec353710101e8mb.html" target="_blank">http://blog.sina.com.cn/s/blog_5ec353710101e8mb.html</a>

---配置有些小錯誤：ipv4接口沒有敲ipv6 enable；并測試時發現單向通不了

二.基本思路：

A.測試環境：

GNS,Cisco IOS Software, 7200 Software (C7200-ADVENTERPRISEK9-M), Version 12.4(24)T7, RELEASE SOFTWARE (fc2)

B.IPV4通路IPV6網絡時，将IPV4位址轉換成帶IPV6 NAT字首的位址

 IPV6通路IPV4網絡，使用IPV4轉換後的IPV6位址通路。

C.測試發現處于IPV4和IPV6的雙棧路由器，IPV4的接口需要配置ipv6 nat和ipv6 enable

D.測試環境ip cef和ipv6 cef對NAT轉換有時有影響，有時沒有影響

E.不知是否是IOS的問題，隻配置v6v4的NAT，通不了，路由器不會自動根據nat字首将IPV4的位址轉成IPV6的位址

F.經過測試，雙棧路由器配置IPV6位址的接口可以不用配置Iipv6 enable，而隻配置IPV4位址的接口需要敲ipv6 enable

G.動态NAT-PT，V6可以主動通路V4（使用V4位址池），還是V4可以主動通路V6（使用V6位址池），跟動态NAT類似，每次都需要占用一個位址，而不能像PAT那樣

三.測試拓撲：

<a href="http://blog.51cto.com/attachment/201312/101950771.jpg" target="_blank"></a>

四.配置步驟：

A.R1：

interface FastEthernet0/0

    ip address 192.168.30.1 255.255.255.0

    no shut

!

ip route 0.0.0.0 0.0.0.0 192.168.30.2

B.R2:

    ip address 192.168.30.2 255.255.255.0

    ipv6 enable

    ipv6 nat

interface FastEthernet0/1

    ipv6 address 2001:DB8:3002::2/64

!        

ipv6 route ::/0 2001:DB8:3002::3

ipv6 nat v4v6 source 192.168.30.1 2000::C0A8:1E01

ipv6 nat v6v4 source 3001:11:0:1::1 150.11.3.1

ipv6 nat prefix 2000::/96

C.R3:

interface Loopback0

    ipv6 address 3001:11:0:1::1/64

    ipv6 address 2001:DB8:3002::3/64

ipv6 route ::/0 2001:DB8:3002::2

五.測試：

R1#ping 150.11.3.1    

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 150.11.3.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 60/87/168 ms

R1#

R3#debug ipv6 icmp

 ICMP Packet debugging is on

R3#

*Dec 28 17:24:06.699: ICMPv6: Received echo request, Src=2000::C0A8:1E01, Dst=3001:11:0:1::1

*Dec 28 17:24:06.703: ICMPv6: Sent echo reply, Src=3001:11:0:1::1, Dst=2000::C0A8:1E01

*Dec 28 17:24:06.779: ICMPv6: Received echo request, Src=2000::C0A8:1E01, Dst=3001:11:0:1::1

*Dec 28 17:24:06.783: ICMPv6: Sent echo reply, Src=3001:11:0:1::1, Dst=2000::C0A8:1E01

*Dec 28 17:24:06.839: ICMPv6: Received echo request, Src=2000::C0A8:1E01, Dst=3001:11:0:1::1

*Dec 28 17:24:06.843: ICMPv6: Sent echo reply, Src=3001:11:0:1::1, Dst=2000::C0A8:1E01

*Dec 28 17:24:06.907: ICMPv6: Received echo request, Src=2000::C0A8:1E01, Dst=3001:11:0:1::1

*Dec 28 17:24:06.907: ICMPv6: Sent echo reply, Src=3001:11:0:1::1, Dst=2000::C0A8:1E01

*Dec 28 17:24:07.015: ICMPv6: Received echo request, Src=2000::C0A8:1E01, Dst=3001:11:0:1::1

*Dec 28 17:24:07.015: ICMPv6: Sent echo reply, Src=3001:11:0:1::1, Dst=2000::C0A8:1E01

R2#show ipv6 nat translations

Prot  IPv4 source              IPv6 source

     IPv4 destination         IPv6 destination

---   ---                      ---

     192.168.30.1             2000::C0A8:1E01

---   150.11.3.1               3001:11:0:1::1

     ---                      ---

本文轉自 碧雲天 51CTO部落格，原文連結：http://blog.51cto.com/333234/1346328，如需轉載請自行聯系原作者