1. 配置各接口所属的VLAN
[LSW1]vlan 10
[LSW1-GigabitEthernet0/0/2]port link-type trunk
[LSW1-GigabitEthernet0/0/2]port trunk allow-pass vlan 10
[LSW2]vlan batch 10 20
[LSW2-GigabitEthernet0/0/1]port link-type trunk
[LSW2-GigabitEthernet0/0/1]port trunk allow-pass vlan 10
[LSW2-GigabitEthernet0/0/3]port link-type trunk
[LSW2-GigabitEthernet0/0/3]port trunk allow-pass vlan 20
[LSW3]vlan 20
[LSW3-GigabitEthernet0/0/2]port link-type trunk
[LSW3-GigabitEthernet0/0/2]port trunk allow-pass vlan 20
2. 配置各接口的IP地址
[LSW1-Vlanif10]ip add 10.1.12.1 24
[LSW2-Vlanif10]ip add 10.1.12.2 24
[LSW2-Vlanif20]ip add 10.1.23.2 24
[LSW3-Vlanif20]ip add 10.1.23.3 24
[LSW1-LoopBack0]ip add 10.1.1.1 32
[LSW2-LoopBack0]ip add 10.2.2.2 32
[LSW3-LoopBack0]ip add 10.3.3.3 32
3. 配置OSPF基本功能
[LSW1]ospf 1 router-id 10.1.1.1
[LSW1-ospf-1]area 0
[LSW1-ospf-1-area-0.0.0.0]network 10.1.12.0 0.0.0.255
[LSW2]ospf 1 router-id 10.2.2.2
[LSW2-ospf-1]area 0
[LSW2-ospf-1-area-0.0.0.0]network 10.1.12.0 0.0.0.255
[LSW2-ospf-1]area 20
[LSW2-ospf-1-area-0.0.0.20]network 10.1.23.0 0.0.0.255
[LSW3]ospf 1 router-id 10.3.3.3
[LSW3-ospf-1]area 20
[LSW3-ospf-1-area-0.0.0.20]network 10.1.23.0 0.0.0.255
4. 验证配置
