浮动路由

浮动路由指的是配置两条静态路由，默认选取链路质量优（带宽大的）作为主路径，当路径出现故障时，由带宽较小的备份路由顶替，保持网络的不中断

浮动路由的地址是默认不显示的，只有主路径失效时，该路径才显示

 

例题：

R1:

<Huawei>undo terminal monitor

Info: Current terminal monitor is off.

<Huawei>system-view

Enter system view, return user view with Ctrl+Z.

[Huawei]sysname R1

[R1]user-interface console 0

[R1-ui-console0]idle-timeout 0 0

[R1-ui-console0]quit

[R1]int e0/0/0

[R1-Ethernet0/0/0]ip add 10.1.3.1 24

[R1-Ethernet0/0/0]undo shut

Info: Interface Ethernet0/0/0 is not shutdown.

[R1-Ethernet0/0/0]int g0/0/0

[R1-GigabitEthernet0/0/0]ip add 10.1.1.1 24

[R1-GigabitEthernet0/0/0]undo shut

Info: Interface GigabitEthernet0/0/0 is not shutdown.

[R1-GigabitEthernet0/0/0]int loop 0

[R1-LoopBack0]ip add 1.1.1.1 32

[R1-LoopBack0]quit

[R1]ip route-static 0.0.0.0 0.0.0.0 10.1.3.2 preference 61

静态路由优先级是60，preference设置比60大即可

 

R2：

<Huawei>undo terminal monitor

Info: Current terminal monitor is off.

<Huawei>system-view

Enter system view, return user view with Ctrl+Z.

[Huawei]sysname R2

[R2]user-interface console 0

[R2-ui-console0]idle-timeout 0 0

[R2-ui-console0]quit

[R2]int e0/0/0

[R2-Ethernet0/0/0]ip add 10.1.3.2 24

[R2-Ethernet0/0/0]undo shut

Info: Interface Ethernet0/0/0 is not shutdown.

[R2-Ethernet0/0/0]int g0/0/0

[R2-GigabitEthernet0/0/0]ip add 10.1.1.2 24

[R2-GigabitEthernet0/0/0]undo shut

Info: Interface GigabitEthernet0/0/0 is not shutdown.

[R2-GigabitEthernet0/0/0]int loop 0

[R2-LoopBack0]ip add 2.2.2.2 32

[R2-LoopBack0]quit

[R2]int g0/0/1

[R2-GigabitEthernet0/0/1]ip add 10.1.2.2 24

[R2-GigabitEthernet0/0/1]undo shut

Info: Interface GigabitEthernet0/0/1 is not shutdown.

[R2-GigabitEthernet0/0/1]quit

[R2]ip route-static 1.1.1.1 32 10.1.3.1 preference 61

 

R3：

<Huawei>undo terminal monitor

Info: Current terminal monitor is off.

<Huawei>system-view

Enter system view, return user view with Ctrl+Z.

[Huawei]sysname R3

[R3]user-interface console 0

[R3-ui-console0]idle-timeout 0 0

[R3-ui-console0]quit

[R3]int g0/0/0

[R3-GigabitEthernet0/0/0]ip add 10.1.2.3 24

[R3-GigabitEthernet0/0/0]undo shut

Info: Interface GigabitEthernet0/0/0 is not shutdown.

[R3-GigabitEthernet0/0/0]int loop 0

[R3-LoopBack0]ip add 3.3.3.3 32

[R3-LoopBack0]quit

 

命令输入完成后开始验证：

R1：

Int g0/0/0

Shutdown

Quit

Display ip routing-table

手动shutdown该链路，测试是否显示备选路由

0.0.0.0/0   Static  61   0          RD   10.1.3.2        Ethernet0/0/0

1.1.1.1/32  Direct  0    0           D   127.0.0.1       LoopBack0

10.1.3.0/24  Direct  0    0           D   10.1.3.1        Ethernet0/0/0

10.1.3.1/32  Direct  0    0           D   127.0.0.1       Ethernet0/0/0

127.0.0.0/8   Direct  0    0           D   127.0.0.1       InLoopBack0

      127.0.0.1/32  Direct  0    0           D   127.0.0.1       InLoopBack0