需知：
1：公网是IPV4 ,私网是IPV6；
2：GRE支持OSPFv3 路由协议；
一、基本配置
1、ZB配置
[ZB-GigabitEthernet0/1]ip address 10.1.1.1 30
[ZB-GigabitEthernet0/0]ipv6 address 1000::1 64
[ZB]ip route-static 0.0.0.0 0 10.1.1.2
2、ISP配置
[ISP-GigabitEthernet0/1]ip address 10.1.1.2 30
[ISP-GigabitEthernet0/2]ip address 20.1.1.1 30
3、FB配置
[FB-GigabitEthernet0/2]ip address 20.1.1.2 30
[FB-GigabitEthernet0/0]ipv6 address 2000::1 64
[FB]ip route-static 0.0.0.0 0 20.1.1.1
二、IPV6 GRE
1、ZB配置
[ZB]int Tunnel 1 mode gre
[ZB-Tunnel1]source 10.1.1.1
[ZB-Tunnel1]destination 20.1.1.2
[ZB-Tunnel1]ipv6 address 100::1 64
2、FB配置
[FB]int Tunnel 1 mode gre
[FB-Tunnel1]source 20.1.1.2
[FB-Tunnel1]destination 10.1.1.1
[FB-Tunnel1]ipv6 address 100::2 64
三、OSPF v3 配置
1、ZB配置
[ZB]ospfv3
[ZB-ospfv3-1]router-id 1.1.1.1
[ZB-Tunnel1]ospfv3 1 area 0
[ZB-GigabitEthernet0/0]ospfv3 1 area 0
2、FB配置
[FB]ospfv3
[FB-ospfv3-1]router-id 1.1.1.2
[FB-Tunnel1]ospfv3 1 area 0
[FB-GigabitEthernet0/0]ospfv3 1 area 0