IPV6

实验拓扑图:

1.先通V4网络,R1、2、9、10

R1给R2做缺省
R2给R9做缺省
R10给R9做缺省
r2上做acl、nat

2.R1、R2为双栈,同时做V6网络

R1
[r1]ipv6 
[r1]int g0/0/0
[r1-GigabitEthernet0/0/0]ipv6 enable 
[r1-GigabitEthernet0/0/0]ipv6 address 2002:1d01:0101::1 64
[r1]ipv6 route-static :: 0 2002:1d01:0101::2


R2
[r2]ipv6
[r2]int g0/0/0
[r2-GigabitEthernet0/0/0]ipv6 enable
[r2-GigabitEthernet0/0/0]ipv6 address 2002:1d01:0101::2 64
[r2]int t0/0/0         做隧道
[r2-Tunnel0/0/0]tunnel-protocol ipv6-ipv4
[r2-Tunnel0/0/0]ipv6 enable     
[r2-Tunnel0/0/0]ipv6 address 2002:1d01:0101:1::1 64
[r2-Tunnel0/0/0]source g0/0/2
[r2-Tunnel0/0/0]destination 91.1.1.2
[r2]ipv6 route-static 2002:: 16 Tunnel 0/0/0
R10
[r10]ipv6     
[r10]int g0/0/1
[r10-GigabitEthernet0/0/1]ipv6 enable 
[r10-GigabitEthernet0/0/1]ipv6 address 2002:5b01:0102::1 64
[r10]int Tunnel 0/0/0        做隧道
[r10-Tunnel0/0/0]tunnel-protocol ipv6-ipv4
[r10-Tunnel0/0/0]source g0/0/0
[r10-Tunnel0/0/0]destination 29.1.1.1    
[r10-Tunnel0/0/0]ipv6 enable 
[r10-Tunnel0/0/0]ipv6 address 2002:5b01:0102:2::1 64
 
[r10]ipv6 route-static 2002:: 16 t0/0/0
[r10]ripng 1
[r10]int g0/0/1
[r10-GigabitEthernet0/0/1]ripng 1 enable          调用ripng
 
[r10]int g0/0/1
[r10-GigabitEthernet0/0/1]ripng default-route originate   强制下放缺省
R11
[r11]ipv6 
[r11]int g0/0/0
[r11-GigabitEthernet0/0/0]ipv6 enable 
[r11-GigabitEthernet0/0/0]ipv6 address 2002:5b01:0102::2 64
[r11]ipv6 
[r11]int lo0
[r11-LoopBack0]ipv6 enable 
[r11-LoopBack0]ipv6 address 2002:5b01:0102:1::1 64
 
[r11]ripng 1             调用ripng
[r11-ripng-1]int g0/0/0
[r11-GigabitEthernet0/0/0]ripng 1 enable 
[r11]int lo0
[r11-LoopBack0]ripng 1 enable

用R1  ping  R11

 2.BGP通

[R3]ipv6        配置地址

[R3]int lo0

[R3-LoopBack0]ipv6 enable

[R3-LoopBack0]ipv6 address 3::3 64

[R3]int g0/0/1

[R3-GigabitEthernet0/0/1]ipv6 enable

[R3-GigabitEthernet0/0/1]ipv6 address 2002:1d01:0101:2::1 64

[R3]ospfv3 100       起ospfv3

[R3-ospfv3-100]router-id 3.3.3.3

[R3]int lo0

[R3-LoopBack0]ospfv3 100 area 0         调用ospfv3

[R3]int g0/0/1

[R3-GigabitEthernet0/0/1]ospfv3 100 area 0

[R3]bgp 64511                 起BGP,联邦

[R3-bgp]router-id 3.3.3.3

[R3-bgp]confederation id 100

[R3-bgp]peer 4::4 as-number 64511

[R3-bgp]peer 4::4 connect-interface lo0

[R3-bgp]ipv6-family

[R3-bgp-af-ipv6]peer 4::4 enable

R4

[r4]ospfv3 100

[r4-ospfv3-100]router-id 4.4.4.4

[r4]int lo0

[r4-LoopBack0]ospfv3 100 area 0

[r4-LoopBack0]int g0/0/0

[r4-GigabitEthernet0/0/0]ospfv3 100 area 0

[r4]int g0/0/1

[r4-GigabitEthernet0/0/1]ospfv3 100 area 0

[r4]bgp 64511

[r4-bgp]router-id 4.4.4.4

[r4-bgp]confederation id 100

[r4-bgp]peer 3::3 as-number 64511

[r4-bgp]peer 3::3 connect-interface lo0

[r4-bgp]peer 5::5 as-number 64511

[r4-bgp]peer 5::5 connect-interface lo0

[r4-bgp]ipv6-family

[r4-bgp-af-ipv6]peer 3::3 enable                   

[r4-bgp-af-ipv6]peer 5::5 enable

[r4-bgp-af-ipv6]peer 5::5 reflect-client                     做反射器

[r4-bgp-af-ipv6]peer 3::3 reflect-client

R5

[r5]ipv6

[r5]int lo0

[r5-LoopBack0]ipv6 enable

[r5-LoopBack0]ipv6 address 5::5 64

[r5]int g0/0/0

[r5-GigabitEthernet0/0/0]ipv6 enable

[r5-GigabitEthernet0/0/0]ipv6 address 2002:1d01:0101:3::2 64

[r5]int g0/0/1

[r5-GigabitEthernet0/0/1]ipv6 enable

[r5-GigabitEthernet0/0/1]ipv6 address 2002:1d01:0101:4::1 64

[r5]ospfv3 100

[r5-ospfv3-100]router-id 5.5.5.5

[r5]int lo0

[r5-LoopBack0]ospfv3 100 area 0

[r5]int g0/0/0

[r5-GigabitEthernet0/0/0]ospfv3 100 area 0

[r5]int g0/0/1

[r5-GigabitEthernet0/0/1]ospfv3 100 area 0

[r5]bgp 64511

[r5-bgp]router-id 5.5.5.5

[r5-bgp]confederation id 100

[r5-bgp]confederation peer-as 64512

[r5-bgp]peer 4::4 as-number 64511

[r5-bgp]peer 4::4 connect-interface LoopBack 0

[r5-bgp]peer 6::6 as-number 64512

[r5-bgp]peer 6::6 connect-interface lo0

[r5-bgp]peer 6::6 ebgp-max-hop

[r5-bgp]ipv6-family

[r5-bgp-af-ipv6]peer 4::4 enable

[r5-bgp-af-ipv6]peer 6::6 enable

R6

[r6]ipv6

[r6]int lo0

[r6-LoopBack0]ipv6 enable

[r6-LoopBack0]ipv6 address 6::6 64

[r6]int g0/0/0

[r6-GigabitEthernet0/0/0]ipv6 enable

[r6-GigabitEthernet0/0/0]ipv6 address 2002:1d01:0101:4::2 64

[r6]int g0/0/1

[r6-GigabitEthernet0/0/1]ipv6 enable

[r6-GigabitEthernet0/0/1]ipv6 address 2002:1d01:0101:5::1 64

[r6]ospfv3 100

[r6-ospfv3-100]router-id 6.6.6.6

[r6]int lo0

[r6-LoopBack0]ospfv3 100 area 0

[r6]int g0/0/0

[r6-GigabitEthernet0/0/0]ospfv3 100 area 0

[r6]bgp 64512

[r6-bgp]router-id 6.6.6.6

[r6-bgp]confederation id 100

[r6-bgp]confederation peer-as 64511

[r6-bgp]peer 5::5 as-number 64511

[r6-bgp]peer 5::5 connect-interface lo0

[r6-bgp]peer 5::5 ebgp-max-hop

[r6-bgp]peer 2002:1d01:0101:5::2 as-number 101

[r6-bgp]ipv6-family

[r6-bgp-af-ipv6]peer 5::5 enable

[r6-bgp-af-ipv6]peer 2002:1d01:0101:5::2 enable

[r6-bgp-af-ipv6]import-route ospfv3 100     重发布ospfv3 R7、R8跑ripng需要

[r6-bgp-af-ipv6]import-route direct           宣告直连,否则R7、R8不通

R7

[r7]ipv6

[r7]int lo0

[r7-LoopBack0]ipv6 enable

[r7-LoopBack0]ipv6 address 7::7 64

[r7]int g0/0/0

[r7-GigabitEthernet0/0/0]ipv6 enable

[r7-GigabitEthernet0/0/0]ipv6 address 2002:1d01:0101:5::2 64

[r7]int g0/0/1

[r7-GigabitEthernet0/0/1]ipv6 enable     

[r7-GigabitEthernet0/0/1]ipv6 address 2002:1d01:0101:6::1 64

[r7]ripng 1

[r7]int lo0

[r7-LoopBack0]ripng 1 enable

[r7-LoopBack0]int g0/0/1

[r7-GigabitEthernet0/0/1]ripng 1 enable

[r7]bgp 101

[r7-bgp]router-id 7.7.7.7

[r7-bgp]peer 2002:1d01:0101:5::1 as-number 100

[r7-bgp]peer 8::8 as-number 101

[r7-bgp]peer 8::8 connect-interface lo0

[r7-bgp]ipv6-family

[r7-bgp-af-ipv6]peer 8::8 enable

[r7-bgp-af-ipv6]peer 2002:1d01:0101:5::1 enable

[r7-bgp-af-ipv6]import-route ripng 1     重发布ripng

[r7-bgp-af-ipv6]import-route direct        宣告直连

[r7]ipv6 route-static :: 0 2002:1d01:0101:5::1

[r7]int g0/0/1

[r7-GigabitEthernet0/0/1]ripng default-route originate   下放缺省,否则ping不通R8

R8

[r8]ipv6

[r8]int lo0

[r8-LoopBack0]ipv6 enable

[r8-LoopBack0]ipv6 address 8::8 64

[r8]int g0/0/0

[r8-GigabitEthernet0/0/0]ipv6 enable

[r8-GigabitEthernet0/0/0]ipv6 address 2002:1d01:0101:6::2 64

[r8]ripng 1

[r8]int lo0

[r8-LoopBack0]ripng 1 enable

[r8-LoopBack0]int g0/0/1

[r8-GigabitEthernet0/0/1]ripng 1 enable

[r8]bgp 101

[r8-bgp]router-id 8.8.8.8

[r8-bgp]peer 7::7 as-number 101

[r8-bgp]peer 7::7 connect-interface lo0

[r8-bgp]ipv6-family

[r8-bgp-af-ipv6]peer 7::7 enable

R3 ping  R8

 BGP通

4.使得全网可达

R2上0/0/1口配ip   写一个汇总缺省

[r2]int g0/0/1  
[r2-GigabitEthernet0/0/1]ipv6 enable    
[r2-GigabitEthernet0/0/1]ipv6 address 2002:1d01:0101:7::1 64
[r2]ipv6 route-static 2002:1d01:0101:: 61 2002:1d01:0101:7::2    汇总缺省

R3上0/0/0口配IP

[R3]int g0/0/0

[R3-GigabitEthernet0/0/0]ipv6 enable

[R3-GigabitEthernet0/0/0]ipv6 address 2002:1d01:0101:7::2

[R3]ipv6 route-static :: 0 2002:1d01:0101:7::1     写一个指向R2的缺省

[R3]ospfv3 100

[R3-ospfv3-100]default-route-advertise     ospfv3强制下放缺省

R1 ping  R8

全网可达,实验完成
 

### IPv6协议介绍 IPv6(Internet Protocol Version 6)是网络层协议的第二代标准协议,由IETF设计并作为IPv4的升级版本推出[^2]。它旨在解决IPv4存在的诸多问题,特别是在地址空间有限、安全性不足以及移动性支持较差等方面。 #### 为什么需要IPv6协议 随着因特网的迅速发展,IPv4的设计缺陷逐渐显现出来。其中最显著的问题之一就是可用IP地址数量接近枯竭。为了应对这一挑战,IPv6通过提供更大的地址空间来满足未来的需求。具体来说,IPv6采用128位地址长度,极大地扩充了可分配的唯一IP地址的数量[^1]。 #### IPv6地址表示方法 IPv6地址通常被写成八组十六进制数的形式,每组之间用冒号分隔开。例如:`2001:0db8:85a3:0000:0000:8a2e:0370:7334`。为了简化书写形式,连续零可以省略为双冒号(`::`),但是在一个完整的地址中只允许出现一次这样的缩写。 ```python # 示例代码展示如何解析简单的IPv6字符串 def parse_ipv6(ipv6_str): parts = ipv6_str.split(':') full_parts = [] double_colon_found = False for part in parts: if not part and not double_colon_found: # 如果遇到'::',填充缺失部分 full_parts.extend(['0'] * (9 - len(full_parts))) double_colon_found = True elif part: full_parts.append(part.zfill(4)) return ':'.join(full_parts) ipv6_example = '2001:db8::8a2e:370:7334' print(parse_ipv6(ipv6_example)) # 输出标准化后的完整IPv6地址 ``` #### IPv6核心特性与应用 相比起IPv4, IPv6不仅提供了更广阔的地址范围,在技术上也有许多改进之处。比如内置的安全机制(IPsec),自动化的主机地址配置功能(stateless address autoconfiguration), 更高效的头部结构从而减少路由器处理负担等等[^3]。 ### 实现方式概述 对于现有基于IPv4架构向纯IPv6环境迁移过程中存在多种过渡方案和技术手段可供选择,这些措施能够保障新旧两套体系间平滑切换的同时继续维持正常业务运作不受影响。常见的几种过渡办法包括双重堆栈(dual stack)模式运行;隧道封装(tunneling)技术传输数据包穿越不兼容区域;翻译转换(translators or NAT-PTs)设备完成不同版本间的相互沟通等。
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