1、6to4 Tunnel解析
E0接口的网络号2002:c0a8:6301::/48的得来：
192.168.99.1转为16进制表示的话为c0a8:6301，在其前面加上20002:即可得到2002:c0a8:6301::/48的网络号。E0接口的IP地址可以手动配置，也可以通过eui-64自动生成。
2、实验拓扑
3、实验配置
R1配置
ipv6 unicast-routing
interface FastEthernet1/0
ipv6 address 2002:202:202::1/64
ipv6 ospf 110 area 0
interface FastEthernet2/0
ipv6 address 2002:202:202:15::1/64
ipv6 ospf 110 area 0
ipv6 router ospf 110
router-id 1.1.1.1
R2配置
ipv6 unicast-routing
interface Loopback0
ip address 2.2.2.2 255.255.255.0
interface Tunnel2
ipv6 unnumbered FastEthernet1/0
tunnel source Loopback0
tunnel mode ipv6ip 6to4
interface FastEthernet1/0
ipv6 address 2002:202:202::2/64
ipv6 ospf 110 area 0
interface FastEthernet2/0
ip address 23.1.1.2 255.255.255.0
ip route 3.3.3.0 255.255.255.0 23.1.1.3
ipv6 route 2002::/16 Tunnel2
ipv6 router ospf 110
router-id 2.2.2.2
redistribute static
R3配置
ipv6 unicast-routing
interface Loopback0
ip address 3.3.3.3 255.255.255.0
interface Tunnel3
ipv6 unnumbered FastEthernet1/0
tunnel source Loopback0
tunnel mode ipv6ip 6to4
interface FastEthernet1/0
ipv6 address 2002:303:303::3/64
ipv6 ospf 110 area 0
interface FastEthernet2/0
ip address 23.1.1.3 255.255.255.0
ip route 2.2.2.0 255.255.255.0 23.1.1.2
ipv6 route 2002::/16 Tunnel3
ipv6 router ospf 110
router-id 3.3.3.3
redistribute static
R4配置
ipv6 unicast-routing
interface FastEthernet1/0
ipv6 address 2002:303:303::4/64
ipv6 ospf 110 area 0
interface FastEthernet2/0
ipv6 address 2002:303:303:46::4/64
ipv6 ospf 110 area 0
ipv6 router ospf 110
router-id 4.4.4.4
R5配置
ipv6 unicast-routing
interface FastEthernet2/0
ipv6 address 2002:202:202:15::5/64
ipv6 ospf 110 area 0
ipv6 router ospf 110
router-id 5.5.5.5
R6配置
ipv6 unicast-routing
interface FastEthernet2/0
ipv6 address 2002:303:303:46::6/64
ipv6 ospf 110 area 0
ipv6 router ospf 110
router-id 6.6.6.6
4、实验测试
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