Cisco交换机VLAN配置

VLAN基本配置

1.       创建vlan

2.       将交换机端口加入vlan

3.       验证vlan配置

实例:

 

配置4PCip地址

SW1配置

Switch>enable

Switch#conf terminal

Switch(config)#hostname SW1

SW1(config)#vlan 2

SW1(config-vlan)#name test2   如果给vlan设置名字,那么两边交换机都要设置,否则不通

SW1(config-vlan)#exit

SW1(config)#vlan 3

SW1(config-vlan)#name test3

SW1(config-vlan)#exit

SW1(config)#interface f0/1    思科交换机只能从接口配置,将接口添加到vlan,华为交换机可以直接从机上配置接口vlan,不用再将接口加入vlan

SW1(config-if)#switchport mode access

SW1(config-if)#switchport access vlan 2

SW1(config-if)#exit

SW1(config)#interface f0/3

SW1(config-if)#switchport mode access

SW1(config-if)#switchport access vlan 3

SW1(config-if)#exit

SW1(config)#interface f0/2

SW1(config-if)#switchport mode trunk

SW1(config-if)#end

SW1#show vlan brief  

 

VLAN Name                             Status    Ports

---- -------------------------------- --------- -------------------------------

1    default                          active    Fa0/4, Fa0/5, Fa0/6, Fa0/7

                                                Fa0/8, Fa0/9, Fa0/10, Fa0/11

                                                Fa0/12, Fa0/13, Fa0/14, Fa0/15

                                                Fa0/16, Fa0/17, Fa0/18, Fa0/19

                                                Fa0/20, Fa0/21, Fa0/22, Fa0/23

                                                Fa0/24, Gig1/1, Gig1/2 

2    VLAN0002                         active    Fa0/1

3    VLAN0003                         active    Fa0/3

F0/2不在默认vlan1中,说明trunk端口添加成功

SW1#show interfaces f0/2 switchport

Name: Fa0/2

Switchport: Enabled

Administrative Mode: trunk

Operational Mode: trunk

SW1(config)#interface range f0/3-10     同时将多个端口添加到vlan 3

SW1(config-if-range)#switchport mode access

SW1(config-if-range)#switchport access vlan 3

 

SW2配置

Switch>enable

Switch#conf terminal

Switch(config)#hostname SW2

SW2(config)#vlan 2

SW2(config-vlan)#name test2

SW2(config-vlan)#exit

SW2(config)#vlan 3

SW2(config-vlan)#name test3

SW2(config-vlan)#exit

SW2(config)#interface f0/2

SW2(config-if)#switchport mode access

SW2(config-if)#switchport access vlan 2

SW2(config-if)#exit

SW2(config)#interface f0/3

SW2(config-if)#switchport mode access

SW2(config-if)#switchport access vlan 3

SW2(config-if)#exit

SW2(config)#interface f0/1

SW2(config-if)#switchport mode trunk

SW2(config-if)#end

SW2#show vlan brief

 

VLAN Name                             Status    Ports

---- -------------------------------- --------- -------------------------------

1    default                          active    Fa0/4, Fa0/5, Fa0/6, Fa0/7

                                                Fa0/8, Fa0/9, Fa0/10, Fa0/11

                                                Fa0/12, Fa0/13, Fa0/14, Fa0/15

                                                Fa0/16, Fa0/17, Fa0/18, Fa0/19

                                                Fa0/20, Fa0/21, Fa0/22, Fa0/23

                                                Fa0/24, Gig1/1, Gig1/2

2    VLAN0002                         active    Fa0/2

3    VLAN0003                         active    Fa0/3

F0/1不在默认vlan1中,说明trunk端口添加成功

SW2#show interfaces f0/1 switchport

Name: Fa0/1

Switchport: Enabled

Administrative Mode: trunk

Operational Mode: trunk

 

测试:PC1  ping  PC3 

      PC2  ping  PC4  

      PC1  ping  PC2  不通

结果:trunk可以承载多条vlan同时通信,trunk的作用是使同一个vlan能够跨越交换机通信。

      Vlan工作在OSI参考模型的第二层(数据链路层),Vlan可以分割局域网络,相同vlan可以通信,不同vlan之间不能通信,阻止广播风暴。

 

 

 

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