一.概述： IPV6 NAT-PT(?Network Address Translation - Port Translation)應(yīng)用與ipv4和ipv6網(wǎng)絡(luò)互訪的情況，根據(jù)參考鏈接配置時出現(xiàn)一些問題，所以記錄下來。 參考鏈接： http://www.cisco.com/en/US/tech/tk648/tk361/technologies_configuration_example09186a0080b9a911.shtml ---配置有些小錯誤：ipv4接口沒有敲ipv6 enable；ipv6接口沒有敲ipv6 nat http://blog.sina.com.cn/s/blog_5ec353710101e8mb.html ---配置有些小錯誤：ipv4接口沒有敲ipv6 enable；并測試時發(fā)現(xiàn)單向通不了
二.基本思路： A.測試環(huán)境： GNS,Cisco IOS Software, 7200 Software (C7200-ADVENTERPRISEK9-M), Version 12.4(24)T7, RELEASE SOFTWARE (fc2)

B.IPV4訪問IPV6網(wǎng)絡(luò)時，將IPV4地址轉(zhuǎn)換成帶IPV6 NAT前綴的地址

?IPV6訪問IPV4網(wǎng)絡(luò)，使用IPV4轉(zhuǎn)換后的IPV6地址訪問。

C.測試發(fā)現(xiàn)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(huán)境ip cef和ipv6 cef對NAT轉(zhuǎn)換有時有影響，有時沒有影響 E.不知是否是IOS的問題，只配置v6v4的NAT，通不了，路由器不會自動根據(jù)nat前綴將IPV4的地址轉(zhuǎn)成IPV6的地址 F.經(jīng)過測試，雙棧路由器配置IPV6地址的接口可以不用配置Iipv6 enable，而只配置IPV4地址的接口需要敲ipv6 enable G.動態(tài)NAT-PT，V6可以主動訪問V4（使用V4地址池），還是V4可以主動訪問V6（使用V6地址池），跟動態(tài)NAT類似，每次都需要占用一個地址，而不能像PAT那樣

三.測試拓?fù)?#xff1a;

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: interface FastEthernet0/0
? ? 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 nat
! ? ? ? ?
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
!
interface FastEthernet0/0
? ? 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
R3#
*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
R3#
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(zhuǎn)自 碧云天 51CTO博客，原文鏈接：http://blog.51cto.com/333234/1346328，如需轉(zhuǎn)載請自行聯(lián)系原作者

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