1. Experiment overview

Experimental requirements: complete the design and configuration of single-arm routing
Experiment content:
1. According to the following topology connection, design the network parameters such as VLAN and IP address by yourself to realize the IP communication from PC3 to PC4.

The topology is as follows

Experimental equipment:

2. Configuration of Layer 2 Switch

Configure PC3 IP: 192.168.3.100 /24，Gateway:192.168.3.1；
Configure PC4 IP: 192.168.4.100 /24，Gateway:192.168.4.1。

Step 1: Divide VALN on S1. Assign port e0/0/1 to VLAN3 and set the interface mode to access, and assign port e0/0/2 to VLAN4 and set the interface mode to access. Establish a trunk connected to router R1 on S1. Make sure that the e0/0/3 interface is a trunk, and allow vlan 2 and vlan 3 to pass.

The configuration commands on the Layer 2 switch are as follows

<Huawei>sys
[Huawei]sysname S1
[S1]undo info-center enable 

[S1]vlan batch 3 4
[S1]int e0/0/1
[S1-Ethernet0/0/1]port link-type access 
[S1-Ethernet0/0/1]port default vlan 3
[S1-Ethernet0/0/1]int e0/0/2
[S1-Ethernet0/0/2]port link-type access
[S1-Ethernet0/0/2]port default vlan 4

[S1-Ethernet0/0/2]int e0/0/3
[S1-Ethernet0/0/3]port link-type trunk 
[S1-Ethernet0/0/3]port trunk allow-pass vlan all

Three, the configuration of the three-layer switch

Step 2: Configure the Layer 3 switch LS1. Enter the system view mode of LS1 and determine that g0/0/1 is the trunk interface connected to the Layer 2 switch S1. Set the routing gateway addresses of VLAN2 and VLAN3 to activate the VLAN interface.
The configuration commands of the Layer 3 switch LS1 are as follows

<Huawei>sys
[Huawei]sysname LS1

[LS1]int g0/0/1
[LS1-GigabitEthernet0/0/1]port link-type trunk 
[LS1-GigabitEthernet0/0/1]port trunk allow-pass vlan all

[LS1]vlan batch 3 4
[LS1]int vlanif 3
[LS1-Vlanif3]ip address 192.168.3.1 24
[LS1-Vlanif3]int vlanif 4
[LS1-Vlanif4]ip address 192.168.4.1 24

4. Experimental results

Ping from PC3 to PC4, success, prove that the single-arm routing configuration is completed.