STP生成树协议
实难拓朴:
实验目标:
1.设置SWITCH1、SWITCH3的优先级为1000
2.对比SWITCH2、SWITCH4的根端口
3.配置SWITCH1与SWITCH3之间的以太网通道
实验步骤:
目标1：
1
．
sw1(config)#spanning-tree vlan 1
启用生成树。
Sw2(config)#spanning-tree vlan 1
Sw2(config)#spanning-tree vlan 1
Sw2(config)#spanning-tree vlan 1
2
．
sw1(config)#spanning-tree vlan 1 priority 1000
设置
SW1
的优先级为
1000
Sw3(config)#spanning-tree vlan 1 priority 1000
设置
SW3
的优先级为
1000
目标2：
1．
SW2
的根端口如下所示：
sw2#show spanning-tree br
*Mar 1 00:23:09.335: %SYS-5-CONFIG_I: Configured from console by console
sw2#show spanning-tree br
VLAN1
Spanning tree enabled protocol ieee
Root ID Priority 1000
Address cc00.0420.0000
Cost 31
Port 2 (FastEthernet0/1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address cc00.0324.0000
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/1 128.2 128 19 FWD 12 1000 cc00.0460.0000 128.2
根端口
FastEthernet0/2 128.3 128 19 BLK 12 1000 cc00.0460.0000 128.3
2．
SW4
的根端口如下所示：
sw4#show spanning-tree br
VLAN1
Spanning tree enabled protocol ieee
Root ID Priority 1000
Address cc00.0420.0000
Cost 19
Port 3 (FastEthernet0/2)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address cc00.0e78.0000
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/1 128.2 128 19 BLK 0 1000 cc00.0420.0000 128.3
FastEthernet0/2 128.3 128 19 FWD 0 1000 cc00.0420.0000 128.2
根端口。
目标3：
1．
SW1
sw1(config)#interface range f0/14 �C 15
sw1(config-if-range)#channel-group 1 mode on
（配置
SW1
上的
f0/14 �C 15
为以太网通道）
Creating a port-channel interface Port-channel1
sw1(config-if-range)#
2．
SW3
同样的配置。
3．
验证：
sw1#show spanning-tree br
VLAN1
Spanning tree enabled protocol ieee
Root ID Priority 1000
Address cc00.0420.0000
Cost 12
Port 321 (Port-channel1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 1000
Address cc00.0460.0000
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/1 128.2 128 19 FWD 12 1000 cc00.0460.0000 128.2
FastEthernet0/2 128.3 128 19 FWD 12 1000 cc00.0460.0000 128.3
Port-channel1 129.65 128 12 FWD 0 1000 cc00.0420.0000 129.65
sw3#show spanning-tree br
VLAN1
Spanning tree enabled protocol ieee
Root ID Priority 1000
Address cc00.0420.0000
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 1000
Address cc00.0420.0000
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/1 128.2 128 19 FWD 0 1000 cc00.0420.0000 128.2
FastEthernet0/2 128.3 128 19 FWD 0 1000 cc00.0420.0000 128.3
Port-channel1 129.65 128 12 FWD 0 1000 cc00.0420.0000 129.65
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