后台收到粉丝留言说讲一下生成树的配置,小微作为一个宠粉专业户,这还不快分分钟安排上,所以小伙伴们有想学想看的知识点都可以留言给小微,小微加更都会安排上~
附上:教学视频+技术文档哦,你就说棒不棒,哈
微思视频教学:超详细的【思科交换机生成树配置】/zvideo/1454466959215218688/zvideo/1454466959215218688
1. 理解生成树的运行原理
2. 掌握生成树的配置方法
1. 根据实验拓扑图,完成设备的基本配置;
2. 把交换机互连的链路配置成Trunk,采用Dot1q封装;
3. 分别在SW1、SW2和SW3上创建VLAN10和VLAN20,并将相应的接口划到对应的VLAN;
4. SW1要作为VLAN10的根,VLAN20的备份根,使PC1访问Server1的路径通过:PC1->SW3->SW1->Server1;
5. SW2要作为VLAN20的根,VLAN10的备份根,使PC2访问Server2的路径通过:PC2->SW3->SW2->Server2;
步骤1:设备的基本配置
配置PC1:
VPCS> set pcname PC1 //设置主机名PC1> ip 192.168.1.1/24//设置IP地址
配置PC2:
VPCS> set pcname PC2PC2> ip 172.16.1.1/24
配置Server1:
VPCS> set pcname Server1Server1> ip 192.168.1.88/24
配置Server2:
VPCS> set pcname Server2Server2> ip 172.16.1.88/24
配置SW1:
Switch>enableSwitch#configure terminalSwitch(config)#hostname SW1SW1(config)#no ip domain-lookupSW1(config)#line console 0SW1(config-line)#exec-timeout 0 0SW1(config-line)#logging synchronousSW1(config-line)#endSW1#
配置SW2:
Switch>enableSwitch#configure terminalSwitch(config)#hostname SW2SW2(config)#no ip domain-lookupSW2(config)#line console 0SW2(config-line)#exec-timeout 0 0SW2(config-line)#logging synchronousSW2(config-line)#endSW2#
配置SW3:
Switch>enableSwitch#configure terminalSwitch(config)#hostname SW3SW3(config)#no ip domain-lookupSW3(config)#line console 0SW3(config-line)#exec-timeout 0 0SW3(config-line)#logging synchronousSW3(config-line)#endSW3#
步骤2:配置Trunk与VLAN
配置SW1:SW1(config)#interface range Eth0/0 - 1SW1(config-if-range)#switchport trunk encapsulation dot1qSW1(config-if-range)#switchport mode trunkSW1(config-if-range)#exitSW1(config)#vlan 10SW1(config-vlan)#name ITSW1(config-vlan)#exitSW1(config)#vlan 20SW1(config-vlan)#name HRSW1(config-vlan)#exitSW1(config)#interface Eth0/2SW1(config-if)#switchport mode accessSW1(config-if)#switchport access vlan 10SW1(config-if)#exitSW1(config)#endSW1#
配置SW2:
SW2(config)#interface range Eth0/1 , Eth0/3SW2(config-if-range)#switchport trunk encapsulation dot1qSW2(config-if-range)#switchport mode trunkSW2(config-if-range)#exitSW2(config)#vlan 10SW2(config-vlan)#name ITSW2(config-vlan)#exitSW2(config)#vlan 20SW2(config-vlan)#name HRSW2(config-vlan)#exitSW2(config)#interface Eth0/2SW2(config-if)#switchport mode accessSW2(config-if)#switchport access vlan 20SW2(config-if)#exitSW2(config)#endSW2#
配置SW3:
SW3(config)#interface range Eth0/0 , Eth0/3SW3(config-if-range)#switchport trunk encapsulation dot1qSW3(config-if-range)#switchport mode trunkSW3(config-if-range)#exitSW3(config)#vlan 10SW3(config-vlan)#name ITSW3(config-vlan)#exitSW3(config)#vlan 20SW3(config-vlan)#name HRSW3(config-vlan)#exitSW3(config)#interface Eth0/1SW3(config-if)#switchport mode accessSW3(config-if)#switchport access vlan 10SW3(config-if)#exitSW3(config)#interface Eth0/2SW3(config-if)#switchport mode accessSW3(config-if)#switchport access vlan 20SW2(config-if)#exitSW3(config)#endSW3#
步骤3:配置生成树
配置SW1:SW1(config)#spanning-tree vlan 10 root primarySW1(config)#spanning-tree vlan 20 root secondary配置SW2:SW2(config)#spanning-tree vlan 20 root primarySW2(config)#spanning-tree vlan 10 root secondary
步骤1:检查VLAN10的生成树
检查SW1:
SW1#show spanning-tree vlan 10VLAN0010Spanning tree enabled protocol ieeeRoot ID Priority 24586Address00.1000This bridge is the rootHello Time 2 sec Max Age 20 sec Forward Delay 15 secBridge ID Priority 24586 (priority 24576 sys-id-ext 10)Address00.1000Hello Time 2 sec Max Age 20 sec Forward Delay 15 secAging Time 15 secInterface Role Sts CostPrio.Nbr Type------------------- ---- --- --------- -------- --------------------------------Et0/0Desg FWD 100 128.1 P2pEt0/1Desg FWD 100 128.2 P2pEt0/2Desg FWD 100 128.3 P2p
SW1是VLAN10的根网桥,因为SW2是VLAN10的备份根网桥,所以SW3的E0/3针对VLAN10肯定是阻塞状态。
检查SW3:
SW3#show spanning-tree vlan 10VLAN0010Spanning tree enabled protocol ieeeRoot ID Priority 24586Address00.1000Cost 100Port 1 (Ethernet0/0)Hello Time 2 sec Max Age 20 sec Forward Delay 15 secBridge ID Priority 32778 (priority 32768 sys-id-ext 10)Address00.3000Hello Time 2 sec Max Age 20 sec Forward Delay 15 secAging Time 300 secInterface Role Sts CostPrio.Nbr Type------------------- ---- --- --------- -------- --------------------------------Et0/0Root FWD 100 128.1 P2pEt0/1Desg FWD 100 128.2 P2pEt0/3Altn BLK 100 128.4 P2p针对VLAN10,SW3的E0/3是阻塞的,E0/0是转发的,这样PC1访问Server1的路径就是:PC1->SW3->SW1->Server1。步骤2:检查VLAN20的生成树检查SW2:SW2#show spanning-tree vlan 20VLAN0020Spanning tree enabled protocol ieeeRoot ID Priority 24596Address00.2000This bridge is the rootHello Time 2 sec Max Age 20 sec Forward Delay 15 secBridge ID Priority 24596 (priority 24576 sys-id-ext 20)Address00.2000Hello Time 2 sec Max Age 20 sec Forward Delay 15 secAging Time 300 secInterface Role Sts CostPrio.Nbr Type------------------- ---- --- --------- -------- --------------------------------Et0/1Desg FWD 100 128.2 P2pEt0/2Desg FWD 100 128.3 P2pEt0/3Desg FWD 100 128.4 P2pSW2是VLAN20的根网桥,因为SW1是VLAN10的备份根网桥,所以SW3的E0/0针对VLAN20肯定是阻塞状态。检查SW3:SW3#show spanning-tree vlan 20VLAN0020Spanning tree enabled protocol ieeeRoot ID Priority 24596Address00.2000Cost 100Port 4 (Ethernet0/3)Hello Time 2 sec Max Age 20 sec Forward Delay 15 secBridge ID Priority 32788 (priority 32768 sys-id-ext 20)Address00.3000Hello Time 2 sec Max Age 20 sec Forward Delay 15 secAging Time 300 secInterface Role Sts CostPrio.Nbr Type------------------- ---- --- --------- -------- --------------------------------Et0/0Altn BLK 100 128.1 P2pEt0/2Desg FWD 100 128.3 P2pEt0/3Root FWD 100 128.4 P2p针对VLAN20,SW3的E0/0是阻塞的,E0/3是转发的,这样PC2访问Server2的路径就是:PC2->SW3->SW2->Server2。