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组网需求
如图1所示，两台IPv6主机分别通过SwitchA和SwitchC与IPv4骨干网络连接，客户希望两台IPv6主机能通过IPv4骨干网互通。
配置思路
配置IPv6 over IPv4手动隧道的思路如下：
-
配置IPv4网络。配置接口的IPv4地址和静态路由，使SwitchA、SwitchB和SwitchC三者之间路由互通。
-
配置IPv6网络。配置隧道边界设备（SwitchA和SwitchC）的IPv6地址，使隧道边界设备与下挂的IPv6主机之间网络互通。
-
配置IPv6 over IPv4手动隧道。配置隧道接口的IPv6地址、协议类型、源接口和目的地址，使IPv6报文可以在IPv4网络中传输。
-
配置IPv6报文指向隧道的静态路由，从而使IPv6报文进入隧道。
做业务环回聚合的接口必须是空闲的，没有承载业务的接口。
在Eth-Trunk接口上使能业务环回功能后，加入Eth-Trunk中的物理接口就会处于UP状态，否则Tunnel接口的链路层协议将无法正常运行。
操作步骤
-
SwitchA的配置文件
#
sysname SwitchA
#
ipv6
#
vlan batch 10 100
#
interface Vlanif10ipv6 enableipv6 address FC00:1::1/64
#
interface Vlanif100ip address 192.168.50.2 255.255.255.0
#
interface Eth-Trunk1stp disableservice type tunnel
#
interface GigabitEthernet0/0/1port link-type hybridport hybrid pvid vlan 100port hybrid untagged vlan 100
#
interface GigabitEthernet0/0/2port link-type accessport default vlan 10
#
interface GigabitEthernet0/0/3eth-trunk 1
#
interface Tunnel0/0/0ipv6 enableipv6 address FC00:3::1/64tunnel-protocol ipv6-ipv4source Vlanif100destination 192.168.51.2eth-trunk 1
#
ip route-static 192.168.51.0 255.255.255.0 192.168.50.1
#
ipv6 route-static FC00:2:: 64 Tunnel0/0/0
#
return-
SwitchB的配置文件
#
sysname SwitchB
#
vlan batch 100 200
#
interface Vlanif100ip address 192.168.50.1 255.255.255.0
#
interface Vlanif200ip address 192.168.51.1 255.255.255.0
#
interface GigabitEthernet0/0/1port link-type hybridport hybrid pvid vlan 100port hybrid untagged vlan 100
#
interface GigabitEthernet0/0/2port link-type hybridport hybrid pvid vlan 200port hybrid untagged vlan 200
#
return-
SwitchC的配置文件
#
sysname SwitchC
#
ipv6
#
vlan batch 20 200
#
interface Vlanif20ipv6 enableipv6 address FC00:2::2/64
#
interface Vlanif200ip address 192.168.51.2 255.255.255.0
#
interface Eth-Trunk1stp disableservice type tunnel
#
interface GigabitEthernet0/0/1port link-type hybridport hybrid pvid vlan 200port hybrid untagged vlan 200
#
interface GigabitEthernet0/0/2port link-type accessport default vlan 20
#
interface GigabitEthernet0/0/3eth-trunk 1
#
interface Tunnel1ipv6 enableipv6 address FC00:3::2/64tunnel-protocol ipv6-ipv4source Vlanif200destination 192.168.50.2eth-trunk 1
#
ip route-static 192.168.50.0 255.255.255.0 192.168.51.1
#
ipv6 route-static FC00:1:: 64 Tunnel1
#
return