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三层交换机的配置

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一、三层交换机配置

    1.启动路由功能

          全局配置模式下:ip routing

      关闭路由功能

          全局配置模式下:no ip routing

    2.配置接口路由

          接口配置模式下:no switchport

 

二、三层交换机配置DHCP中继

        让三层交换机可以将DHCP这种特殊的广播信息在VLAN间转发,让其他VLAN的客户机也可以

    从DHCP服务器那里获得IP地址,需要在三层交换机配置DHCP中继。

        全局配置模式下:interface vlan vlan-id

                        ip helper-address DHCPsrv-IPaddress 

 

 

实验一:配置三层交换实现VLAN互通与路由

三层交换机的配置



            三层交换机SW2的配置

                     特权模式下:vlan database

                                 vlan 2

                                 vlan 3

                 全局配置模式下:ip routing

                                 interface vlan 1

                                 ip address 192.168.1.1 255.255.255.0

                                 no shutdown 

                                 interface vlan 2

                                 ip address 192.168.2.1 255.255.255.0

                                 no shutdown   

                                 interface vlan 3

                                 ip address 192.168.3.1 255.255.255.0

                                 no shutdown 

                                 interface f0/1

                                 switchport mode trunk 

                                 interface f0/2

                                 no switchport

                                 ip address 10.0.0.1 255.0.0.0

                                 no shutdown

 

                                 ip route 0.0.0.0 0.0.0.0 10.0.0.2

        交换机SW1上的配置

                     特权模式下:vlan database

                                 vlan 2

                                 vlan 3

                 全局配置模式下:interface f0/4

                                 switchport mode trunk

                                 interface f0/2

                                 switchport mode access

                                 switchport access vlan 2

                                 interface f0/3

                                 switchport mode access

                                 switchport access vlan 3

        路由器R1上的配置

                 全局配置模式下:interface f0/0

                                 ip address 10.0.0.2 255.0.0.0

                                 no shutdown

                                 interface f0/1

                                 ip address 192.168.4.1 255.255.255.0

                                 no shutdown

 

                                 ip route 0.0.0.0 0.0.0.0 10.0.0.1

        PC1配置ip地址:192.168.1.2 子网掩码:255.255.255.0 默认网关:192.168.1.1

        PC2配置ip地址:192.168.2.2 子网掩码:255.255.255.0 默认网关:192.168.2.1

        PC3配置ip地址:192.168.3.2 子网掩码:255.255.255.0 默认网关:192.168.3.1

        PC4配置ip地址:192.168.4.2 子网掩码:255.255.255.0 默认网关:192.168.4.1

 

实验二:配置三层交换机DHCP中继,使PC1自动自动获取到ip地址和默认网关

三层交换机的配置



            DHCPsrv(R3)上的配置

                 全局配置模式下:no ip routing

                                 interface f0/0

                                 ip address 192.168.20.2 255.255.255.0

                                 no shutdown

 

                                 ip dhcp pool p1

                                 network 192.168.10.0 255.255.255.0

                                 default-router 192.168.10.1

        SW1上的配置

                     特权模式下:vlan database

                                 vlan 10

                                 vlan 20

                 全局配置模式下:interface f0/14

                                 switchport mode access

                                 switchport access vlan 20

                                 interface f0/1

                                 switchport mode access

                                 switchport access vlan 10

                                 interface vlan 10

                                 ip address 192.168.10.1 255.255.255.0

                                 ip helper-address 192.168.20.2

                                 no shutdown

                                 interface vlan 20

                                 ip address 192.168.20.1 255.255.255.0

                                 no shutdown

 

                                 interface f0/15

                                 no switchport

                                 ip address 192.168.0.1 255.255.255.0

                                 no shutdown

                               

                                 ip route 0.0.0.0 0.0.0.0 192.168.0.2

        PC1(R2)上的配置

                 全局配置模式下:no ip routing

                                 interface f0/0

                                 ip address dhcp

                                 no shutdown

        路由器R1上的配置

                 全局配置模式下:interface f0/0

                                 ip address 192.168.0.2 255.255.255.0
                                     no shutdown

                                 interface f0/1

                                 ip address 192.168.1.1 255.255.255.0

                                 no shutdown

 

                                 ip route 0.0.0.0 0.0.0.0 192.168.0.1

        PC2配置ip地址:192.168.0.2 子网掩码:255.255.255.0 默认网关:192.168.0.1

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