本图使用Gns模拟器
实验需求:
1.要求利用vtp实现vlan同步设置
2.要求vtp server实现备份冗余
3.创建vlan 1~10要求MLSW1 是奇数vlan主根
MLSW2 是偶数vlan主根
且两个互为备份
4.接入层流量按拓扑表走
5.要求c1和c3,c2和c5 通讯
实验步骤:
拓扑图的构造:
a)MLSW1、MLSW2、ALSW1、ALSW1由四台 3640路由器构成
b)给主机配置IP(tools里点击vpcs )
vpcs[1]>ip 192.168.1.2/24 192.168.1.1
vpcs[1]>save !!!必须保存
vpcs[1]>2
vpcs[2]>ip 192.168.2.2/24 192.168.2.1
vpcs[2]>save
vpcs[2]>3
vpcs[3]>ip 192.168.1.3/24 192.168.1.1
vpcs[3]>save
vpcs[3]>4
vpcs[4]>ip 192.168.2.3/24 192.168.2.1
vpcs[4]>save
Step1:取消路由功能(工作没有此类情况,实验路由有)
MLSW1(config)#no ip routing
MLSW2(config)#no ip routing
ALSW1(config)#no ip routing
ALSW2(config)#no ip routing
Step2:完成trunk-link
ALSW1:
ALSW1(config)#int ran f0/3 -4
ALSW1(config-if-range)#switchport trunk encapsulation dot1q
ALSW1(config-if-range)#switchport mode trunk
ALSW2:
ALSW2(config)#int ran f0/3 -4
ALSW2(config-if-range)#switchport trunk encapsulation dot1q
ALSW2(config-if-range)#switchport mode trunk
MLSW1:
MLSW1(config)#int ran f0/3 -4
MLSW1(config-if-range)#switchport trunk encapsulation dot1q
MLSW1(config-if-range)#switchport mode trunk
MLSW1(config)#int ran f0/14 -15
MLSW1(config-if-range)#switchport trunk encapsulation dot1q
MLSW1(config-if-range)#switchport mode trunk
MLSW2:
MLSW2(config)#int ran f0/3 -4
MLSW2(config-if-range)#switchport trunk encapsulation dot1q
MLSW2(config-if-range)#switchport mode trunk
MLSW2(config)#int ran f0/14 -15
MLSW2(config-if-range)#switchport trunk encapsulation dot1q
MLSW2(config-if-range)#switchport mode trunk
Show interface trunk
Step3:完成VTP设置
MLSW1:
MLSW1#vlan database //vlan d
MLSW1(vlan)#vtp server //vtp s
MLSW1(vlan)#vtp domain a //vtp d a
MLSW1(vlan)#vtp password a
MLSW2:
MLSW2#vlan database
MLSW2(vlan)#vtp server
MLSW2(vlan)#vtp domain a
MLSW2(vlan)#vtp password a
ALSW1:
ALSW1#vlan database
ALSW1(vlan)#vtp client //vtp c
ALSW1(vlan)#vtp domain a
ALSW1(vlan)#vtp password a
ALSW2:
ALSW2#vlan database
ALSW2(vlan)#vtp client
ALSW2(vlan)#vtp domain a
ALSW2(vlan)#vtp password a
Step4:完成vlan配置并校验是否同步
MLSW1:
MLSW1#vlan database
MLSW1(vlan)#vlan 1
MLSW1(vlan)#vlan 2
MLSW1(vlan)#vlan 3
MLSW1(vlan)#vlan 4
MLSW1(vlan)#vlan 5
MLSW1(vlan)#vlan 6
MLSW1(vlan)#vlan 7
MLSW1(vlan)#vlan 8
MLSW1(vlan)#vlan 9
MLSW1(vlan)#vlan 10
Show vlan-switch(特例只在模拟器使用)
Show vtp status
Step5:完成接口划入vlan
ALSW1:
ALSW1#conf t
ALSW1 (config)#int f0/1
ALSW1 (config-if)#switchport mode access
ALSW1 (config-if)#switchport access vlan 2 //switchp a v 2
ALSW1 (config-if)#int f0/2
ALSW1 (config-if)#switchport mode access
ALSW1 (config-if)#switchport access vlan 3
ALSW2:
ALSW2#conf t
ALSW2 (config)#int f0/1
ALSW2 (config-if)#switchport mode access
ALSW2 (config-if)#switchport access vlan 2
ALSW2 (config-if)#int f0/2
ALSW2 (config-if)#switchport mode access
ALSW2 (config-if)#switchport access vlan 3
Show vlan-switch
Ping 主机检验
Step6:分析当前STP拓扑
6.1查看交换机BID,查看根桥
MLSW1#show spanning-tree bridge
MLSW2#show spanning-tree bridge
6.2确认根桥
MLSW1#show spanning-tree root
6.3确认交换机端口状态
MLSW1#show spanning-tree brief
Step7:修改根桥
MLSW1:
MLSW1#conf t
MLSW1(config)#spanning-tree vlan 1 priority 4096 //优先级越小越优
MLSW1(config)#spanning-tree vlan 3 priority 4096 //pvst
MLSW1(config)#spanning-tree vlan 5 priority 4096 //默认优先级32768
MLSW1(config)#spanning-tree vlan 7 priority 4096
MLSW1(config)#spanning-tree vlan 9 priority 4096
MLSW1(config)#spanning-tree vlan 2 priority 8192
MLSW1(config)#spanning-tree vlan 4 priority 8192
MLSW1(config)#spanning-tree vlan 6 priority 8192
MLSW1(config)#spanning-tree vlan 8 priority 8192
MLSW1(config)#spanning-tree vlan 10 priority 8192
MLSW2:
MLSW2#conf t
MLSW2(config)#spanning-tree vlan 2 priority 4096
MLSW2(config)#spanning-tree vlan 4 priority 4096
MLSW2(config)#spanning-tree vlan 6 priority 4096
MLSW2(config)#spanning-tree vlan 8 priority 4096
MLSW2(config)#spanning-tree vlan 10 priority 4096
MLSW2(config)#spanning-tree vlan 1 priority 8192
MLSW2(config)#spanning-tree vlan 3 priority 8192
MLSW2(config)#spanning-tree vlan 5 priority 8192
MLSW2(config)#spanning-tree vlan 7 priority 8192
MLSW2(config)#spanning-tree vlan 9 priority 8192
MLSW1#show spanning-tree brief
MLSW1#show spanning-tree root
Step8:多层交换机修改偶数vlan根端口 一上一下
MLSW1 偶数vlan 根端口 14 变15(不变流量不会一上一下)改大14的开销
MLSW1#conf t
MLSW1(config)#int f0/14
MLSW1(config-if)#spanning-tree vlan 2 cost 100
MLSW1(config-if)#spanning-tree vlan 4 cost 100
MLSW1(config-if)#spanning-tree vlan 6 cost 100
MLSW1(config-if)#spanning-tree vlan 8 cost 100
MLSW1(config-if)#spanning-tree vlan 10 cost 100
MLSW1#show spanning-tree brief
Step9:接入层检验奇偶,流量是否走各自根
ALSW1#show spanning-tree brief
最后用ping检测是否通讯
易错点:1)vpcs[1]是指20000 vpcs[2]是指20001 以此类推
2)输入完ip地址后必须save保存一下