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vtp（vlan中继协议）配置

admin 11月 14, 2020 0

关于思科VTP(vlan中继协议)配置实验

VTP(vlan中继协议)说简单点，就是用来在二层交换机上进行vlan通信，例如3台交换机，将中间的那台交换机作为vlan server，其他两台作为vlan client，我们只需要配置server就可以达到在不同交换机上的vlan通信。

准备工作：

准备3台交换机，命名为Switch1、Switch2、Switch3；
4台电脑，分别为PC1、PC2、PC3、PC4。将Switch1作为vlan server，Switch2和Switch3作为client。

设备名	IP地址	接口
PC1	192.168.1.10	Switch2:f0/1
PC2	192.168.1.20	Switch2:f0/2
PC3	192.168.1.30	Switch3:f0/1
PC4	192.168.1.40	Switch3:f0/2

Switch2：f0/3——>Switch1:f0/1
Switch3：f0/3——>Switch1:f0/2
具体示意看图一。

1、配置vlan server（Switch1）：

Switch>en

Switch#vlan database 
% Warning: It is recommended to configure VLAN from config mode,
  as VLAN database mode is being deprecated. Please consult user
  documentation for configuring VTP/VLAN in config mode.

1 2	Switch(vlan)#vtp domain abc Changing VTP domain name from NULL to abc

1 2	Switch(vlan)#vtp server Device mode already VTP SERVER.

1
2
3

Switch(vlan)#exit 
APPLY completed.
Exiting....

1 2	Switch#conf t Enter configuration commands, one per line. End with CNTL/Z.

1	Switch(config)#vlan 10

1	Switch(config-vlan)#vlan 20

2、配置vlan client（Switch2）：

Switch>en

Switch#vlan database 
% Warning: It is recommended to configure VLAN from config mode,
  as VLAN database mode is being deprecated. Please consult user
  documentation for configuring VTP/VLAN in config mode.

1 2	Switch(vlan)#vtp domain abc Changing VTP domain name from NULL to abc

1 2	Switch(vlan)#vtp client Setting device to VTP CLIENT mode.

1
2
3

Switch(vlan)#exit
APPLY completed.
Exiting....

1 2	Switch#conf t Enter configuration commands, one per line. End with CNTL/Z.

1	Switch(config)#int f0/1

1	Switch(config-if)#switchport mode access

1	Switch(config-if)#switchport access vlan 10

1	Switch(config-if)#int f0/2

1	Switch(config-if)#switchport mode access

1	Switch(config-if)#switchport access vlan 20

1	Switch(config-if)#int f0/3

Switch(config-if)#switchport mode trunk
Switch(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to up

3、配置vlan client（Switch3）：

Switch>en

Switch#vlan database 
% Warning: It is recommended to configure VLAN from config mode,
  as VLAN database mode is being deprecated. Please consult user
  documentation for configuring VTP/VLAN in config mode.

1 2	Switch(vlan)#vtp domain abc Changing VTP domain name from NULL to abc

1 2	Switch(vlan)#vtp client Setting device to VTP CLIENT mode.

1
2
3

Switch(vlan)#exit
APPLY completed.
Exiting....

1 2	Switch#conf t Enter configuration commands, one per line. End with CNTL/Z.

1	Switch(config)#int f0/1

1	Switch(config-if)#switchport mode access

1	Switch(config-if)#switchport access vlan 10

1	Switch(config-if)#int f0/2

1	Switch(config-if)#switchport mode access

1	Switch(config-if)#switchport access vlan 20

1	Switch(config-if)#int f0/3

Switch(config-if)#switchport mode trunk
Switch(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to up