Single arm routing experiment demonstration (Huawei router device configuration)

One 、 Overview of single arm routing

Through the Ethernet interface of the router “ A subinterface （ Logical interface ）” Division , Achieve the original isolation of different VLAN Interconnection between .

Two 、 Advantages and disadvantages of single arm routing

advantage ： Saves router interface , It makes a difference VLAN Communication between .

shortcoming ： Sub interfaces rely on physical interfaces , Inflexible application , Easy to become a single point of network failure .

3、 ... and 、 The instance configuration

（1） Topology

（2）SW1 To configure

<Huawei>system-view  

[Huawei]sysname SW1

[SW1]vlan batch 10 20

[SW1]]int g0/0/1

[SW1-GigabitEthernet0/0/1] port link-type access

[SW1-GigabitEthernet0/0/1] port default vlan 10

[SW1-GigabitEthernet0/0/1] int g0/0/2

[SW1-GigabitEthernet0/0/2] port link-type access

[SW1-GigabitEthernet0/0/2]port default vlan 20

[SW1-GigabitEthernet0/0/2] int g0/0/3

[SW1-GigabitEthernet0/0/3] port link-type trunk

[SW1-GigabitEthernet0/0/3] port trunk allow-pass vlan 10 20

（3）R1 To configure

<Huawei>system-view  

[Huawei]sysname SW1

[R1]int g0/0/0.10

[R1-GigabitEthernet0/0/0.10]dot1q termination vid 10

[R1-GigabitEthernet0/0/0.10]ip address 192.168.10.254 24

[R1-GigabitEthernet0/0/0.10]arp broadcast enable

[R1-GigabitEthernet0/0/0.10]int g0/0/0.20

[R1-GigabitEthernet0/0/0.20]dot1q termination vid 20

[R1-GigabitEthernet0/0/0.20]ip address 192.168.20.254 24

[R1-GigabitEthernet0/0/0.20]arp broadcast enable

（4） For verification PC1 ping PC2