Vlan和Trunk实验

实验拓扑


图1-1

注:如无特别说明,描述中的R1或SW1对应拓扑中设备名称末尾数字为1的设备,R2或SW2对应拓扑中设备名称末尾数字为2的设备,以此类推


实验需求

  1. 按图示为PC配置IP地址
  2. SW1和SW2上分别创建vlan10和vlan20,要求PC3和PC5属于vlan10,PC4和PV6属于vlan20
  3. SW1和SW2相连的接口配置为trunk类型,允许vlan10和vlan20通过
  4. 测试效果,同一vlan的PC可以互通,不同vlan的PC无法互通

实验解法

  1. PC配置IP地址命令略
  2. SW1和SW2上分别创建vlan10和vlan20

    步骤1:在SW1上创建vlan10和vlan20

    [SW1]vlan 10
    [SW1-vlan10]vlan 20
    [SW1-vlan20]
    

    步骤2:在SW2上创建vlan10和vlan20

    [SW2]vlan 10
    [SW2-vlan10]vlan 20
    [SW2-vlan20]
    
  3. SW1和SW2都把g1/0/1接口加入vlan10,g1/0/2接口加入vlan20

    步骤1:在SW1上把g1/0/1接口加入到vlan10,把g1/0/2接口加入到vlan20

    [SW1]vlan 10
    [SW1-vlan10]port g1/0/1
    [SW1-vlan10]vlan 20
    [SW1-vlan20]port g1/0/2
    

    步骤2:在SW2上把g1/0/1接口加入到vlan10,把g1/0/2接口加入到vlan20

    [SW2]vlan 10
    [SW2-vlan10]port g1/0/1
    [SW2-vlan10]vlan 20
    [SW2-vlan20]port g1/0/2
    
  4. SW1和SW2的g1/0/3接口都配置为trunk,允许vlan10和vlan20通过

    步骤1:在SW1上把g1/0/3接口配置为Trunk类型,并允许vlan10和vlan20通过

    [SW1]interface g1/0/3
    [SW1-GigabitEthernet1/0/3]port link-type trunk 
    [SW1-GigabitEthernet1/0/3]port trunk permit vlan 10 20
    

    步骤2:在SW2上把g1/0/3接口配置为Trunk类型,并允许vlan10和vlan20通过

    [SW2]interface g1/0/3
    [SW2-GigabitEthernet1/0/3]port link-type trunk 
    [SW2-GigabitEthernet1/0/3]port trunk permit vlan 10 20
    
  5. 测试结果,如下所示,PC3可以PING通PC5,但无法PING通PC4和PC6

    步骤1:在PC3上PingPC4,发现不能Ping通

    <H3C>ping 192.168.1.2
    Ping 192.168.1.2 (192.168.1.2): 56 data bytes, press CTRL_C to break
    Request time out
    Request time out
    Request time out
    Request time out
    Request time out
    

    步骤2:在PC3上PingPC5,发现可以Ping通

    <H3C>ping 192.168.1.3
    Ping 127.0.0.1 (127.0.0.1): 56 data bytes, press CTRL_C to break
    56 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=0.000 ms
    56 bytes from 127.0.0.1: icmp_seq=1 ttl=255 time=0.000 ms
    56 bytes from 127.0.0.1: icmp_seq=2 ttl=255 time=0.000 ms
    56 bytes from 127.0.0.1: icmp_seq=3 ttl=255 time=0.000 ms
    56 bytes from 127.0.0.1: icmp_seq=4 ttl=255 time=0.000 ms
    

    步骤3:在PC3上PingPC6,发现不能Ping通

    <H3C>ping 192.168.1.4
    Ping 192.168.1.4 (192.168.1.4): 56 data bytes, press CTRL_C to break
    Request time out
    Request time out
    Request time out
    Request time out
    Request time out