Cisco 特殊VLAN划分之一个VLAN多个网段IP
1.拓扑如图所示.
2.连线示意如下：
Switch1 F0/1 <----> Router1 F0/0
Switch1 F0/2 <----> Router2 F0/0
Switch1 F0/3 <----> Router3 F0/0
Switch1 F0/4 <----> Router4 F0/0
3.r01,r02,r03模拟PC。ip地址分别为：192.168.1.1；192.168.2.2；192.168.3.3；网关分别为192.168.1.254；192.168.2.254；192.168.3.254；它们均属于VLAN 123.
4.需求：各个PC能相互通讯。
5.解决方案：单臂路由器，辅助IP地址。
6.具体实现如下：
R01#sh run
Building configuration...
Current configuration : 1221 bytes
!
version 12.4
!
hostname R01
!
no ip routing
!
!
interface FastEthernet0/0
ip address 192.168.1.1 255.255.255.0
no ip route-cache
speed 100
full-duplex
!
!
ip default-gateway 192.168.1.254
!
!
end
/////////////////////////////////////////////////////////////////////////////////////////////////////
SW_01#sh run
Building configuration...
Current configuration : 1582 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname SW_01
!
!
interface FastEthernet0/1
switchport access vlan 123
no ip address
duplex full
speed 100
!
interface FastEthernet0/2
switchport access vlan 123
no ip address
duplex full
speed 100
!
interface FastEthernet0/3
switchport access vlan 123
no ip address
duplex full
speed 100
!
interface FastEthernet0/4
switchport mode trunk
no ip address
duplex full
speed 100
!
!
End
//////////////////////////////////////////////////////////////////////////////////////////////////////
R04#sh run
Building configuration...
Current configuration : 877 bytes
!
version 12.4
!
hostname R04
!
!
interface FastEthernet0/0.1
encapsulation dot1Q 123
ip address 192.168.2.254 255.255.255.0 secondary
ip address 192.168.3.254 255.255.255.0 secondary
ip address 192.168.1.254 255.255.255.0
!
!
end
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
6.说明：不可以在R04上配置另一个子接口为vlan123进行vlan间路由。会弹出如下提示,因此只能使用辅助地址来完成需求。