配置STP与VTP

环境：三台交换机，形成一个全互连结构，sw3为2950，sw1和sw2为2900xl；

要求：设置sw3为VTP server,设置sw1和sw2为VTP client,域名为cisco，密码为：cisco，在server创建vlan 10(name:aa)和vlan20(name:bb);设置sw3为vlan1的根桥，sw1为vlan10的根桥，sw2为vlan20的根桥；

初始化配置：

Sw#show vlan 查看vlan信息

Sw#Delete vlan.dat 用此命令将vlan删除

Sw#show startup-config 查看一下NVRAM是否保存了配置

Sw#erase startup-config 清空配置文件

Sw#reload 重新启动交换机

sw>enable

sw#config terminal

sw(config)#hostname sw1

sw1(config)#no ip domain-lookup 关闭域名查找

sw1(config)#line console 0

sw1(config-line)#logging synchronous 命令输入达到同步

sw1(config-line)#exec-timeout 0 0 设置永不超时

sw1(config-line)#exit

步骤一、配置VTP

sw3的配置：

sw3(config)#vtp mode server 在sw3上启用vtp server

Device mode already VTP SERVER.

sw3(config)#vtp domain cisco 设置域名

Changing VTP domain name from NULL to cisco

sw3(config)#vtp password cisco 设置密码

Setting device VLAN database password to cisco

sw1的配置:

sw1#vlan database 进入vlan数据库

sw1(vlan)#vtp client 启用VTP client模式

Setting device to VTP CLIENT mode.

sw1(vlan)#vtp domain cisco 作用到cisco域中

sw1(vlan)#vtp password cisco 设置密码与server端相同

Setting device VLAN database password to cisco.

sw1(vlan)#exit 使配置生效

In CLIENT state, no apply attempted.

Exiting....

sw2的配置:

sw2#vlan database

sw2(vlan)#vtp client

sw2(vlan)#vtp domain cisco

sw2(vlan)#vtp password cisco

sw2(vlan)#exit

sw2#

步骤二、启用干道端口

sw3(config)#interface fa0/23

sw3(config-if)#switchport mode trunk 启用trunk端口

sw3(config-if)#interface fa0/24

sw3(config-if)#switchport mode trunk

sw1的配置：

sw1(config)#interface fa0/23

sw1(config-if)#switchport trunk encapsulation dot1q 封装干道协议

sw1(config-if)#switchport mode trunk 启用trunk模式

sw1(config-if)#

sw1(config)#interface fa0/24

sw1(config-if)#switchport trunk encapsulation dot1q

sw1(config-if)#switchport mode trunk

sw2的配置：

sw2(config)#interface fa0/23

sw2(config-if)#switchport trunk encapsulation dot1q

sw2(config-if)#switchport mode trunk

sw2(config)#interface fa0/24

步骤三、测试vtp状态及创建vlan

sw3的状态：

sw3#show vtp status 显示vtp状态

VTP Version : 2

Configuration Revision : 0 配置修订号

Maximum VLANs supported locally : 254

Number of existing VLANs : 5

VTP Operating Mode : server vtp模式

VTP Domain Name : cisco vtp域名

VTP Pruning Mode : Disabled

VTP V2 Mode : Disabled

VTP Traps Generation : Disabled

MD5 digest : 0x3F 0x17 0xC8 0xB8 0x5A 0xE3 0x01 0x66

Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00

创建vlan:

sw3(config)#vlan 10 创建VLAN10

sw3(config-vlan)#name aa 命名为aa

sw3(config-vlan)#exit 应用配置

sw3(config)#vlan 20 创建VLAN20

sw3(config-vlan)#name bb 命名为bb

sw3(config-vlan)#exit

sw3(config)#

sw3#show vtp status 在sw3显示vtp的状态

Configuration Revision : 2 server的修订号

Number of existing VLANs : 7 vlan也已经增加

VTP Operating Mode : server

VTP Domain Name : cisco

MD5 digest : 0x98 0x31 0xCF 0xA0 0xA7 0x17 0x73 0x66

Configuration last modified by 0.0.0.0 at 3-1-93 00:52:05

sw2的状态：

sw2#show vtp status

Configuration Revision : 2 已经同步了server

Number of existing VLANs : 7

VTP Operating Mode : Client

sw1的vlan信息:

sw1#show vlan 显示vlan信息

VLAN Name Status Ports

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

1 default active Fa0/1, Fa0/2, Fa0/3, 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

10 aa active 已经同步了vlan的信息

20 bb active

步骤四、配置PVST

sw3(config)#spanning-tree vlan 1 root primary 设置为vlan1的根桥

Sw1(config)#spanning-tree vlan 10 priority 4096 设置为vlan10的根桥

Sw2(config)#spanning-tree vlan 20 priority 4096 设置为vlan20的根桥

步骤五、显示STP的信息

sw1的生成树信息:

sw1#show spanning-tree brief 显示每VLAN生成树信息

VLAN1

Spanning tree enabled protocol IEEE

ROOT ID Priority 24577

Address 0007.eb06.1740 非vlan1的根桥

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 32768

Address 0030.803d.f640

VLAN10

ROOT ID Priority 4096

Address 0030.803d.f641 为vlan10的根桥

This bridge is the root

Bridge ID Priority 4096

Address 0030.803d.f641

VLAN20

Address 00b0.645f.34c2 非vlan20的根桥

Address 0030.803d.f642

sw2的生成树信息:

sw2#show spanning-tree brief

Spanning tree enabled protocol IEEE 非vlan1的根桥

Address 0007.eb06.1740

Address 00b0.645f.34c0

ROOT ID Priority 4096 非vlan10的根桥

Address 00b0.645f.34c1

ROOT ID Priority 4096 为vlan20的根桥

Address 00b0.645f.34c2

sw3的生成树信息:

sw3#show spanning-tree

VLAN0001

Spanning tree enabled protocol ieee

Root ID Priority 24577 为vlan1的根桥

Bridge ID Priority 24577 (priority 24576 sys-id-ext 1)

Aging Time 300

VLAN0010

Root ID Priority 4096 非vlan10的根桥

Cost 19

Port 24 (FastEthernet0/24)

Bridge ID Priority 32779 (priority 32768 sys-id-ext 11)

VLAN0020

Root ID Priority 4096 非vlan20的根桥

Port 23 (FastEthernet0/23)

Bridge ID Priority 32780 (priority 32768 sys-id-ext 12)

Interface Role Sts Cost Prio.Nbr Type

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

Fa0/23 Root FWD 19 128.23 P2p

Fa0/24 Altn BLK 19 128.24 P2p

步骤六、显示当前配置结果

Sw1的配置结果：

sw1#show running-config

!

hostname sw1

spanning-tree vlan 10 priority 4096

！

no ip domain-lookup

interface FastEthernet0/23

switchport trunk encapsulation dot1q

switchport mode trunk

interface FastEthernet0/24

end

sw2的配置结果：

sw2#show running-config

hostname sw2

spanning-tree vlan 20 priority 4096

sw3的配置结果：

sw3#show running-config

hostname sw3

spanning-tree vlan 1 priority 24576

End

                             -------------文章出处：http://g.51cto.com/netengineer/49841