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组网需求

如图1，两个IPv6网络分别通过SwitchA和SwitchC与IPv4公网中的SwitchB连接，客户希望两个IPv6网络中的PC1和PC2实现互通。

其中PC1和PC2上分别指定SwitchA和SwitchC为自己的缺省网关。

图1 配置IPv6 over IPv4 GRE隧道组网图

1. 配置物理接口的IP地址，并配置IPv4静态路由，实现设备可以通过IPv4网络通信。

2. 在SwitchA和SwitchC上创建Tunnel接口，创建GRE隧道，并在SwitchA和SwitchC上配置经过Tunnel接口的IPv6静态路由，使PC1和PC2之间的流量通过GRE隧道传输，实现PC1和PC2互通。

• SwitchA的配置文件 

#
sysname SwitchA
#    
ipv6      
#  
vlan batch 10 30
#
interface Vlanif10ip address 20.1.1.1 255.255.255.0
#
interface Vlanif30ipv6 enableipv6 address FC00:1::1/64
#
interface Eth-Trunk1  service type tunnel
#
interface GigabitEthernet0/0/1port link-type trunkport trunk allow-pass vlan 10
#
interface GigabitEthernet0/0/2port link-type accessport default vlan 30
#
interface GigabitEthernet0/0/3eth-trunk 1 
#
interface Tunnel 0/0/0ipv6 enableipv6 address 2001:db8:1::1/64tunnel-protocol gresource 20.1.1.1destination 30.1.1.2eth-trunk 1
#
ip route-static 30.1.1.0 255.255.255.0 20.1.1.2
#                                                                               
ipv6 route-static FC00:2:: 64 Tunnel0/0/0 
#
return

• SwitchB的配置文件
   

#
sysname SwitchB
#
vlan batch 10 20
#
interface Vlanif10ip address 20.1.1.2 255.255.255.0
#
interface Vlanif20ip address 30.1.1.1 255.255.255.0
#
interface GigabitEthernet0/0/1port link-type trunkport trunk allow-pass vlan 10
#
interface GigabitEthernet0/0/2port link-type trunkport trunk allow-pass vlan 20
#
return

• SwitchC的配置文件

#
sysname SwitchC
#    
ipv6     
#
vlan batch 20 30
#
interface Vlanif20ip address 30.1.1.2 255.255.255.0
#
interface Vlanif30ipv6 enableipv6 address FC00:2::1/64
#
interface Eth-Trunk1  service type tunnel
#
interface GigabitEthernet0/0/1port link-type trunkport trunk allow-pass vlan 20
#
interface GigabitEthernet0/0/2port link-type accessport default vlan 30
#
interface GigabitEthernet0/0/3eth-trunk 1 
#
interface Tunnel0/0/0ipv6 enableipv6 address 2001:db8:1::2/64tunnel-protocol gresource 30.1.1.2destination 20.1.1.1eth-trunk 1
#
ip route-static 20.1.1.0 255.255.255.0 30.1.1.1
#                                                                               
ipv6 route-static FC00:1:: 64 Tunnel0/0/0
#
return