VLAN单臂路由+ospf配置

以下是VLAN单臂路由+OSPF配置的步骤：

1. 配置交换机S1的VLAN接口和IP地址：

interface vlan 30
ip address 192.168.30.254 255.255.255.0

interface vlan 40
ip address 192.168.40.254 255.255.255.0

2. 配置交换机S4、S5、S6的IP地址：

interface vlan 300
ip address 192.168.90.1 255.255.255.0

interface vlan 300
ip address 192.168.90.2 255.255.255.0

interface vlan 300
ip address 192.168.90.3 255.255.255.0

3. 配置单臂路由：

interface GigabitEthernet0/0/1
switchport mode trunk
switchport trunk allowed vlan 30,40,300
no shutdown

interface GigabitEthernet0/0/2
switchport mode access
switchport access vlan 300
no shutdown

interface Vlan300
ip address 192.168.90.254 255.255.255.0
no shutdown

4. 配置OSPF：

router ospf 1
network 192.168.30.0 0.0.0.255 area 0
network 192.168.40.0 0.0.0.255 area 0
network 192.168.90.0 0.0.0.255 area 0