VTP协议实验详细配置步骤

   步骤8

    只须在VTP服务器上启用修剪就启用了整个管理域的修剪。

    sw1(config)#vtp pruning
    Pruning switched on
    sw1(config)#

    验证配置：

    sw1#show vtp status
    VTP Version                     : 2
    Configuration Revision          : 2
    Maximum VLANs supported locally : 64
    Number of existing VLANs        : 7
    VTP Operating Mode              : Server
    VTP Domain Name                 : cisco
    VTP Pruning Mode                : Enabled
    VTP V2 Mode                     : Disabled
    VTP Traps Generation            : Disabled
    MD5 digest                      : 0xE3 0xBD 0xA0 0xC9 0x14 0x85 0x9B 0xFC
    Configuration last modified by 0.0.0.0 at 3-1-93 00:47:48
    Local updater ID is 0.0.0.0 (no valid interface found)
    sw1#
   
   
    sw2#show vtp status
    VTP Version                     : 2
    Configuration Revision          : 2
    Maximum VLANs supported locally : 64
    Number of existing VLANs        : 7
    VTP Operating Mode              : Client
    VTP Domain Name                 : cisco
    VTP Pruning Mode                : Enabled
    VTP V2 Mode                     : Disabled
    VTP Traps Generation            : Disabled
    MD5 digest                      : 0xE3 0xBD 0xA0 0xC9 0x14 0x85 0x9B 0xFC
    Configuration last modified by 0.0.0.0 at 3-1-93 00:47:48
    sw2#

    步骤9

    在SW1的中继中去除vlan3的修剪

    sw1#config t
    Enter configuration commands, one per line.  End with CNTL/Z.
    sw1(config)#interface range fastethernet0/11 - 12
    sw1(config-if-range)#switchport trunk pruning vlan remove 3
    sw1(config-if-range)#
   
    验证配置：

    sw1#show interface fastethernet0/11 switchport
    Name: Fa0/11
    Switchport: Enabled
    Administrative Mode: dynamic desirable
    Operational Mode: trunk (member of bundle Po1)
    Administrative Trunking Encapsulation: dot1q
    Operational Trunking Encapsulation: dot1q
    Negotiation of Trunking: On
    Access Mode VLAN: 1 (default)
    Trunking Native Mode VLAN: 1 (default)
    Voice VLAN: none
    Administrative private-vlan host-association: none
    Administrative private-vlan mapping: none
    Administrative private-vlan trunk native VLAN: none
    Administrative private-vlan trunk encapsulation: dot1q
    Administrative private-vlan trunk normal VLANs: none
    Administrative private-vlan trunk private VLANs: none
    Operational private-vlan: none
    Trunking VLANs Enabled: ALL
    Pruning VLANs Enabled: 2,4-1001
    Capture Mode Disabled
    Capture VLANs Allowed: ALL
    Protected: false
    Appliance trust: none

    sw1#show interface fastethernet0/12 switchport
    Name: Fa0/12
    Switchport: Enabled
    Administrative Mode: dynamic desirable
    Operational Mode: trunk (member of bundle Po1)
    Administrative Trunking Encapsulation: dot1q
    Operational Trunking Encapsulation: dot1q
    Negotiation of Trunking: On
    Access Mode VLAN: 1 (default)
    Trunking Native Mode VLAN: 1 (default)
    Voice VLAN: none
    Administrative private-vlan host-association: none
    Administrative private-vlan mapping: none
    Administrative private-vlan trunk native VLAN: none
    Administrative private-vlan trunk encapsulation: dot1q
    Administrative private-vlan trunk normal VLANs: none
    Administrative private-vlan trunk private VLANs: none
    Operational private-vlan: none
    Trunking VLANs Enabled: ALL
    Pruning VLANs Enabled: 2,4-1001
    Capture Mode Disabled
    Capture VLANs Allowed: ALL
    Protected: false
    Appliance trust: none
    sw1#
   
    在SW2上验证：

    sw2#show interface fastethernet0/11 switchport
    Name: Fa0/11
    Switchport: Enabled
    Administrative Mode: dynamic desirable
    Operational Mode: trunk (member of bundle Po1)
    Administrative Trunking Encapsulation: dot1q
    Operational Trunking Encapsulation: dot1q
    Negotiation of Trunking: On
    Access Mode VLAN: 1 (default)
    Trunking Native Mode VLAN: 1 (default)
    Administrative private-vlan host-association: none
    Administrative private-vlan mapping: none
    Operational private-vlan: none
    Trunking VLANs Enabled: ALL
    Pruning VLANs Enabled: 2-1001

    Protected: false

    Voice VLAN: none (Inactive)
    Appliance trust: none

   我们会发现SW2上并没有去除vlan3的修剪，说明移出修剪不同启用修剪。需要根据情况在每个交换机上配置。
  
   修剪的意义：

   交换机默认情况下是在网络上传播广播和未知数据包。这样会给整个网络带来大量的不必要流量。

   VTP修剪通过减少不必要的流量，如：广播、多播、未知等。来提高带宽利用率。

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