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PC1访问PC2时#xff0c;会先构造源ipv6为2001:1::2#xff0c;目的IPV6为2001:2::2的ipv6报文#xff0c;然后查看PC1的路由表#xff0c;发送到R1#xff0c;r1接收后#xff0c;以目的IPV6地址2001:2::2查询IPV6路由表#xff0c;出接口为tun0/0/0…
思路
PC1访问PC2时会先构造源ipv6为2001:1::2目的IPV6为2001:2::2的ipv6报文然后查看PC1的路由表发送到R1r1接收后以目的IPV6地址2001:2::2查询IPV6路由表出接口为tun0/0/0接口报文进入tunnel0/0/0进行处理tun0/0/0接口为隧道gre类型源地址100.0.0.2至目的地址200.0.0.2随后将ipv6报文封装到gre再封装到IPV4报文中新的IPV4头源地址为100.0.0.2目的地址为200.0.0.2在r1设备上查询ipv4路由转发到R3R3收到后发现目的是ipv4自己进行解封装读取gre报头协议类型为0X86DD继续解封装交给IPV6模块再查询ipv6路由表进行转发至pc2
R1
ipv6 interface GigabitEthernet0/0/0 ip address 100.0.0.2 255.255.255.252 interface GigabitEthernet0/0/1 ipv6 enable ipv6 address 2001:1::1/64 interface GigabitEthernet0/0/2 interface NULL0 interface Tunnel0/0/0 ipv6 enable ipv6 address 2001:12::1/64 //这个地址可以不用配置 tunnel-protocol gre //隧道方式 source 100.0.0.2 //这里的公网地址必须配置 destination 200.0.0.2 //这里的公网地址必须配置 ip route-static 0.0.0.0 0.0.0.0 100.0.0.1 ipv6 route-static 2001:2:: 64 Tunnel0/0/0 //把ipv6引入到隧道
R2
interface GigabitEthernet0/0/0 ip address 100.0.0.1 255.255.255.252 interface GigabitEthernet0/0/1 ip address 200.0.0.1 255.255.255.252
R3
ipv6 interface GigabitEthernet0/0/0 ip address 200.0.0.2 255.255.255.252 interface GigabitEthernet0/0/1 ipv6 enable ipv6 address 2001:2::1/64 interface GigabitEthernet0/0/2 interface Tunnel0/0/0 ipv6 enable ipv6 address 2001:12::2/64 tunnel-protocol gre source 200.0.0.2 destination 100.0.0.2 ip route-static 0.0.0.0 0.0.0.0 200.0.0.1 ipv6 route-static 2001:1:: 64 Tunnel0/0/0
