Understanding Global Unicast IPv6 Addressing

【实验说明】

在R1与R2之间配置IPv6，其中IP地址使用单播网络地址2001::/64 ，主机部分使用 modified EUI-64 格式

 

【实验拓扑】

 

【配置向导】

• 在R1与R2的以太网接口上配置 IPv6网络地址2001::/64
• 使用modified EUI-64 地址充当他们的主机为部分

 

【实验思考】

Pv6中的 link-local, site-local, and global unicast 地址的区别？

在整个全局单播地址空间中有多少个主机？

 

【实验配置】

R1 & R2:

interface FastEthernet0/0

ipv6 address 2001::/64 eui-64

 

【实验验证】

 

R1#show ipv6 interface brief

FastEthernet0/0 [up/up]

FE80::CE00:32FF:FE08:0

2001::CE00:32FF:FE08:0

R1#show ipv6 interface

FastEthernet0/0 is up, line protocol is up

IPv6 is enabled, link-local address is FE80::CE00:32FF:FE08:0

Global unicast address(es):

2001::CE00:32FF:FE08:0, subnet is 2001::/64 [EUI]

Joined group address(es):

FF02::1

FF02::2

FF02::1:FF08:0

MTU is 1500 bytes

ICMP error messages limited to one every 100 milliseconds

ICMP redirects are enabled

ND DAD is enabled, number of DAD attempts: 1

ND reachable time is 30000 milliseconds

 

R2#show ipv6 interface brief

FastEthernet0/0 [up/up]

FE80::CE01:32FF:FE08:0

2001::CE01:32FF:FE08:0

 

R2#show ipv6 interface

FastEthernet0/0 is up, line protocol is up

IPv6 is enabled, link-local address is FE80::CE01:32FF:FE08:0

Global unicast address(es):

2001::CE01:32FF:FE08:0, subnet is 2001::/64 [EUI]

Joined group address(es):

FF02::1

FF02::2

FF02::1:FF08:0

MTU is 1500 bytes

ICMP error messages limited to one every 100 milliseconds

ICMP redirects are enabled

ND DAD is enabled, number of DAD attempts: 1

ND reachable time is 30000 milliseconds

 

R1#ping 2001::CE01:32FF:FE08:0

 

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 2001::CE01:32FF:FE08:0, timeout is 2 seconds:

!!!!!

 

【实验总结】

全球单播IPv6地址，也叫聚合全局地址，是一个以二进制序列001开头的地址，表示为2000::/3 开始的地址，整个 全球单播地址的范围为： 2000::/128 到 3FFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF/128, 可以的地址空间为 42,535,295,865,117,307,932,921,825,928,971,000,000 个，是整个ipv6 地址空间的八分之一。