配置IPv4 over IPv6隧道示例

配置IPv4 over IPv6隧道示例

组网需求
如图，两个IPv4网络分别通过RT1和RT5与IPv6网络连接。IPv6网络的边界设备RT2和RT4支持IPv4和IPv6双协议栈。客户在RT2和RT4之间配置IPv4 over IPv6隧道，使物理分离的这两个IPv4网络可以互通。

配置思路
本例按如下思路进行配置：
    在两端IPv6网络边界路由器上配置IPv4-over-IPv6隧道
    采用动态路由协议配置经过该隧道接口转发的路由
操作步骤
    配置IPv6网络的物理接口IPv6地址和IS-IS的IPv6特性，实现IPv6网络的IP连通性
    # 配置RT2。
    <Huawei> system-view
    [Huawei] sysname RT2
    [RT2] ipv6
    [RT2] interface gigabitethernet 2/0/0
    [RT2-GigabitEthernet2/0/0] ipv6 enable
    [RT2-GigabitEthernet2/0/0] ipv6 address fc00:1::1 64
    [RT2-GigabitEthernet2/0/0] quit
    [RT2] isis 1
    [RT2-isis-1] network-entity 10.0000.0000.0001.00
    [RT2-isis-1] ipv6 enable topology standard
    [RT2-isis-1] quit
    [RT2] interface gigabitethernet 2/0/0
    [RT2-GigabitEthernet2/0/0] isis ipv6 enable 1
    [RT2-GigabitEthernet2/0/0] quit

    # 配置RT3。
    <Huawei> system-view
    [Huawei] sysname RT3
    [RT3] ipv6
    [RT3] interface gigabitethernet 1/0/0
    [RT3-GigabitEthernet1/0/0] ipv6 enable
    [RT3-GigabitEthernet1/0/0] ipv6 address fc00:1::2 64
    [RT3-GigabitEthernet1/0/0] quit
    [RT3] interface gigabitethernet 2/0/0
    [RT3-GigabitEthernet2/0/0] ipv6 enable
    [RT3-GigabitEthernet2/0/0] ipv6 address fc00:2::1 64
    [RT3-GigabitEthernet2/0/0] quit
    [RT3] isis 1
    [RT3-isis-1] network-entity 10.0000.0000.0002.00
    [RT3-isis-1] ipv6 enable topology standard
    [RT3-isis-1] quit
    [RT3] interface gigabitethernet 1/0/0
    [RT3-GigabitEthernet1/0/0] isis ipv6 enable 1
    [RT3-GigabitEthernet1/0/0] quit
    [RT3] interface gigabitethernet 2/0/0
    [RT3-GigabitEthernet2/0/0] isis ipv6 enable 1
    [RT3-GigabitEthernet2/0/0] quit

    # 配置RT4。
    <Huawei> system-view
    [Huawei] sysname RT4
    [RT4] ipv6
    [RT4] interface gigabitethernet 1/0/0
    [RT4-GigabitEthernet1/0/0] ipv6 enable
    [RT4-GigabitEthernet1/0/0] ipv6 address fc00:2::2 64
    [RT4-GigabitEthernet1/0/0] quit
    [RT4] isis 1
    [RT4-isis-1] network-entity 10.0000.0000.0003.00
    [RT4-isis-1] ipv6 enable topology standard
    [RT4-isis-1] quit
    [RT4] interface gigabitethernet 1/0/0
    [RT4-GigabitEthernet1/0/0] isis ipv6 enable 1
    [RT4-GigabitEthernet1/0/0] quit
    配置IPv4网络的物理接口IPv4地址和OSPF，实现IPv4网络的IP连通性

    # 配置RT1。
    <Huawei> system-view
    [Huawei] sysname RT1
    [RT1] interface gigabitethernet 1/0/0
    [RT1-GigabitEthernet1/0/0] ip address 10.1.2.2 30
    [RT1-GigabitEthernet1/0/0] quit
    [RT1] ospf 1
    [RT1-ospf-1] area 0
    [RT1-ospf-1-area-0.0.0.0] network 10.1.2.0 0.0.0.3

    # 配置RT2。
    [RT2] interface gigabitethernet 1/0/0
    [RT2-GigabitEthernet1/0/0] ip address 10.1.2.1 30
    [RT2-GigabitEthernet1/0/0] quit
    [RT2] ospf 1
    [RT2-ospf-1] area 0
    [RT2-ospf-1-area-0.0.0.0] network 10.1.2.0 0.0.0.3

    # 配置RT4。
    [RT4] interface gigabitethernet 2/0/0
    [RT4-GigabitEthernet2/0/0] ip address 10.1.3.1 30
    [RT4-GigabitEthernet2/0/0] quit
    [RT4] ospf 1
    [RT4-ospf-1] area 0
    [RT4-ospf-1-area-0.0.0.0] network 10.1.3.0 0.0.0.3

    # 配置RT5。
    <Huawei> system-view
    [Huawei] sysname RT5
    [RT5] interface gigabitethernet 1/0/0
    [RT5-GigabitEthernet1/0/0] ip address 10.1.3.2 30
    [RT5-GigabitEthernet1/0/0] quit
    [RT5] ospf 1
    [RT5-ospf-1] area 0
    [RT5-ospf-1-area-0.0.0.0] network 10.1.3.0 0.0.0.3

    配置Tunnel接口
    # 创建Tunnel接口，配置Tunnel接口的IPv4地址、源IPv6地址（或源接口）、目的IPv6地址。
    # 配置RT2。
    [RT2] interface tunnel 0/0/2
    [RT2-Tunnel0/0/2] tunnel-protocol ipv4-ipv6
    [RT2-Tunnel0/0/2] ip address 10.1.1.1 30
    [RT2-Tunnel0/0/2] source gigabitethernet 2/0/0
    [ET2-Tunnel0/0/2] destination fc00:2::2

    # 配置RT4。
    [RT4] interface tunnel 0/0/1
    [RT4-Tunnel0/0/1] tunnel-protocol ipv4-ipv6
    [RT4-Tunnel0/0/1] ip address 10.1.1.2 30
    [RT4-Tunnel0/0/1] source gigabitethernet 1/0/0
    [ET4-Tunnel0/0/1] destination fc00:1::1

    配置经过该隧道接口转发的路由

    # 配置RT2。
    [RT2] ospf 1
    [RT2-ospf-1] area 0
    [RT2-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.3
    [RT2-ospf-1-area-0.0.0.0] quit
    [RT2-ospf-1] quit

    # 配置RT4。
    [RT4] ospf 1
    [RT4-ospf-1] area 0
    [RT4-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.3

    验证配置结果
    # 完成上述配置后，在RT2和RT4上查看隧道接口，可看到隧道接口的协议状态为UP。
    [RT2] display interface tunnel 0/0/2
    Tunnel0/0/2 current state : UP
    Line protocol current state : UP
    Last line protocol up time: 2010-06-22, 19:33:19
    Description : HUAWEI, AR Series, Tunnel0/0/2 Interface
    Route Port,The Maximum Transmit Unit is 1500
    Internet Address is 10.1.1.1/30
    Encapsulation is TUNNEL6, loopback not set
    Tunnel protocol/transport (IPv6 or IPv4) over IPv6
    Tunnel Source fc00:1::1 (GigabitEthernet2/0/0)
    Tunnel Destination fc00:2::2
    Tunnel Encapsulation limit 4
    Tunnel Traffic class not set
    Tunnel Flow label not set
    Tunnel Hop limit 64
    Current system time: 2012-09-05 10:28:33                                        
        300 seconds input rate 0 bits/sec, 0 packets/sec                            
        300 seconds output rate 0 bits/sec, 0 packets/sec                           
        102 seconds input rate 0 bits/sec, 0 packets/sec                            
        102 seconds output rate 0 bits/sec, 0 packets/sec                           
        0 packets input,  0 bytes                                                   
        0 input error                                                               
        0 packets output,  0 bytes                                                  
        0 output error                                                              
        Input bandwidth utilization  : --                                           
        Output bandwidth utilization : --

    # 在RT2和RT4上查看IPv4路由表，可看到去往远端IPv4网络的路由出接口为Tunnel接口。
    [RT2] display ip routing-table
    Routing Tables: Public
             Destinations : 9        Routes : 9
    Destination/Mask    Proto  Pre  Cost       NextHop         Interface
            1.1.1.1/32  Direct 0    0          127.0.0.1       InLoopBack0
           10.1.1.0/30  Direct 0    0          10.1.1.1        Tunnel0/0/2
           10.1.1.1/32  Direct 0    0          127.0.0.1       Tunnel2/0/0
           10.1.2.0/30  Direct 0    0          10.1.2.1        GigabitEthernet1/0/0
           10.1.2.1/32  Direct 0    0          127.0.0.1       GigabitEthernet1/0/0
           10.1.2.2/32  Direct 0    0          10.1.2.2        GigabitEthernet1/0/0
           10.1.3.0/24  OSPF   10   2           10.1.1.2        Tunnel0/0/2
          127.0.0.0/8   Direct 0    0          127.0.0.1       InLoopBack0
          127.0.0.1/32  Direct 0    0          127.0.0.1       InLoopBack0
    # RT1和RT5可以互相ping通。

配置文件
    RT1的配置文件
    #
     sysname RT1
    #
    interface GigabitEthernet1/0/0
     ip address 10.1.2.2 255.255.255.252
    #
    ospf 1
     area 0.0.0.0
      network 10.1.2.0 0.0.0.3
    #
    return

    RT2的配置文件
    #
     sysname RT2
    #
    ipv6
    #
    isis 1
     network-entity 10.0000.0000.0001.00
     #
      ipv6 enable topology standard
     #
    #
    interface GigabitEthernet1/0/0
     ip address 10.1.2.1 255.255.255.252
    #
    interface GigabitEthernet2/0/0
     ipv6 enable
     ipv6 address fc00:1::1/64
    isis ipv6 enable 1
    #
    interface Tunnel0/0/2
     ip address 10.1.1.1 255.255.255.252
     tunnel-protocol ipv4-ipv6
     source  GigabitEthernet2/0/0
     destination  fc00:2::2
    #
    ospf 1
     area 0.0.0.0
      network 10.1.2.0 0.0.0.3
      network 10.1.1.0 0.0.0.3
    #
    return

    RT3的配置文件
    #
     sysname RT3
    #
    ipv6
    #
    isis 1
     network-entity 10.0000.0000.0002.00
     #
      ipv6 enable topology standard
     #
    #
    interface GigabitEthernet1/0/0
     ivp6 enable
     ipv6 address fc00:1::2/64
     isis ipv6 enable 1
    #
    interface GigabitEthernet2/0/0
     ipv6 enable
     ipv6 address fc00:2::1/64
     isis ipv6 enable 1
    #
    return

    RT4的配置文件
    #
     sysname RT4
    #
    ipv6
    #
    isis 1
     network-entity 10.0000.0000.0003.00
     #
      ipv6 enable topology standard
     #
    #
    interface GigabitEthernet1/0/0
     ipv6 enable
     ipv6 address fc00:2::2/64
     isis ipv6 enable 1
    #
    interface GigabitEthernet2/0/0
     ip address 10.1.3.1 255.255.255.252
    #
    interface Tunnel0/0/1
     ip address 10.1.1.2 255.255.255.252
     tunnel-protocol ipv4-ipv6
     source  GigabitEthernet1/0/0
     destination  fc00:1::1
    #
    ospf 1
     area 0.0.0.0
      network 10.1.1.0 0.0.0.3
      network 10.1.3.0 0.0.0.3
    #
    return

    RT5的配置文件
    #
     sysname RT1
    #
    interface GigabitEthernet1/0/0
     ip address 10.1.3.2 255.255.255.252
    #
    ospf 1
     area 0.0.0.0
      network 10.1.3.0 0.0.0.3
    #
    return

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