H3C MSR路由器GRE over IPv4典型配置案例

一、 组网需求
    路由器H3C A和路由器H3C B之间通过Internet相连。两个私有子网Group 1和Group 2，通过在两台路由器之间使用GRE建立隧道实现互联。

二、组网拓扑图如下
 

三、 配置步骤

在开始下面的配置之前，需确保H3C  A和H3C  B之间路由可达。

(1)配置路由器H3C A

# 配置接口Ethernet1/1。

<H3C A> system-view

[H3C A] interface ethernet 1/1

[H3C A-Ethernet1/1] ip address 10.1.1.1 255.255.255.0

[H3C A-Ethernet1/1] quit

# 配置接口Serial2/0（隧道的实际物理接口）。

[H3C A] interface serial 2/0

[H3C A-Serial2/0] ip address 1.1.1.1 255.255.255.0

[H3C A-Serial2/0] quit

# 创建Tunnel0接口。

[H3C A] interface tunnel 0

# 配置Tunnel0接口的IP地址。

[H3C A-Tunnel0] ip address 10.1.2.1 255.255.255.0

# 配置Tunnel封装模式。

[H3C A-Tunnel0] tunnel-protocol gre

# 配置Tunnel0接口的源地址（Serial2/0的IP地址）。

[H3C A-Tunnel0] source 1.1.1.1

# 配置Tunnel0接口的目的地址（H3C  B的Serial2/1的IP地址）。

[H3C A-Tunnel0] destination 2.2.2.2

[H3C A-Tunnel0] quit

# 配置从H3C A经过Tunnel0接口到Group 2的静态路由。

[H3C A] ip route-static 10.1.3.0 255.255.255.0 tunnel 0

(2) 配置路由器H3C B

# 配置接口Ethernet1/1。

<H3C B> system-view

[H3C B] interface ethernet 1/1

[H3C B-Ethernet1/1] ip address 10.1.3.1 255.255.255.0

[H3C B-Ethernet1/1] quit

# 配置接口Serial2/1（隧道的实际物理接口）。

[H3C B] interface serial 2/1

[H3C B-Serial2/1] ip address 2.2.2.2 255.255.255.0

[H3C B-Serial2/1] quit

# 创建Tunnel0接口。

[H3C B] interface tunnel 0

# 配置Tunnel0接口的IP地址。

[H3C B-Tunnel0] ip address 10.1.2.2 255.255.255.0

# 配置Tunnel封装模式。

[H3C B-Tunnel0] tunnel-protocol gre

# 配置Tunnel0接口的源地址（Serial2/1的IP地址）。

[H3C B-Tunnel0] source 2.2.2.2

# 配置Tunnel0接口的目的地址（H3C A的Serial2/0的IP地址）。

[H3C B-Tunnel0] destination 1.1.1.1

[H3C B-Tunnel0] quit

# 配置从H3C B经过Tunnel0接口到Group 1的静态路由。

[H3C B] ip route-static 10.1.1.0 255.255.255.0 tunnel 0

四、验证配置结果

完成以上配置后，分别查看H3C  A和H3C  B的Tunnel接口状态。

[H3C A] display interface tunnel 0

Tunnel0 current state: UP

Line protocol current state: UP

Description: Tunnel0 Interface

The Maximum Transmit Unit is 1476

Internet Address is 10.1.2.1/24 Primary

Encapsulation is TUNNEL, service-loopback-group ID not set.

Tunnel source 1.1.1.1, destination 2.2.2.2

Tunnel keepalive disabled

Tunnel protocol/transport GRE/IP

    GRE key disabled

    Checksumming of GRE packets disabled

Output queue : (Urgent queuing : Size/Length/Discards)  0/100/0

Output queue : (Protocol queuing : Size/Length/Discards)  0/500/0

Output queue : (FIFO queuing : Size/Length/Discards)  0/75/0

Last clearing of counters:  Never

    Last 300 seconds input:  0 bytes/sec, 0 packets/sec

    Last 300 seconds output:  0 bytes/sec, 0 packets/sec

    10 packets input,  840 bytes

    0 input error

    10 packets output,  840 bytes

    0 output error

[H3C B] display interface tunnel 0

Tunnel0 current state: UP

Line protocol current state: UP

Description: Tunnel0 Interface

The Maximum Transmit Unit is 1476

Internet Address is 10.1.2.2/24 Primary

Encapsulation is TUNNEL, service-loopback-group ID not set.

Tunnel source 2.2.2.2, destination 1.1.1.1

Tunnel keepalive disabled

Tunnel protocol/transport GRE/IP

    GRE key disabled

    Checksumming of GRE packets disabled

Output queue : (Urgent queuing : Size/Length/Discards)  0/100/0

Output queue : (Protocol queuing : Size/Length/Discards)  0/500/0

Output queue : (FIFO queuing : Size/Length/Discards)  0/75/0

Last clearing of counters:  Never

    Last 300 seconds input:  2 bytes/sec, 0 packets/sec

    Last 300 seconds output:  2 bytes/sec, 0 packets/sec

    10 packets input,  840 bytes

    0 input error

    10 packets output,  840 bytes

    0 output error

# 从H3C  B可以Ping通H3C  A上Ethernet1/1接口的地址。

[H3C B] ping 10.1.1.1

  PING 10.1.1.1: 56  data bytes, press CTRL_C to break

    Reply from 10.1.1.1: bytes=56 Sequence=1 ttl=255 time=2 ms

    Reply from 10.1.1.1: bytes=56 Sequence=2 ttl=255 time=2 ms

    Reply from 10.1.1.1: bytes=56 Sequence=3 ttl=255 time=2 ms

    Reply from 10.1.1.1: bytes=56 Sequence=4 ttl=255 time=2 ms

    Reply from 10.1.1.1: bytes=56 Sequence=5 ttl=255 time=2 ms

 

  --- 10.1.1.1 ping statistics ---

    5 packet(s) transmitted

    5 packet(s) received

    0.00% packet loss

    round-trip min/avg/max = 2/2/2 ms

    好了，通过这个案例的配置，相信大家对H3C MSR路由器的GRE over IPv4应该比较熟悉了。欢迎交流！