网络拓朴:
实验目标:
目标1.在SWITCH1和SWITCH2之间开启以太网通道
目标2.使用VTP分别在各个交换机上配置VLAN2,VLAN3,VLAN4四个VLAN【包含VLAN1】
目标3.将SWITCH1配置为VLAN1、VLAN3的根桥,VLAN2、VLAN4的次根桥
将SWITCH2配置为VLAN2、VLAN4的根桥,VLAN1、VLAN3的次根桥
目标4.关闭所有SWITCH1端口观察VLAN1、VLAN3的根桥变换.
目标5.查看SWITCH3的F0/1口是否对于VLAN4是BLOCK的,并实现VLAN3在SWITCH3上的上 行链路切换
实验环境描述:
三台交换机形成局域网交换网络,通过配置PVST<每VLAN生成树>,实现VLAN负载分担.
实验步骤:
1. 在所有的交换机端口上开启Trunk模式,开启VTP。(配置第一章已做 )
2. SW1和SW2之间开启以网通道。
sw1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
sw1(config)#interface range f0/14 - 15
sw1(config-if-range)#channel-group 1 mode on
Creating a port-channel interface Port-channel1
sw1#show ip in br
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset up down
FastEthernet0/1 unassigned YES unset up up
FastEthernet0/2 unassigned YES unset up up
FastEthernet0/3 unassigned YES unset up up
FastEthernet0/4 unassigned YES unset up down
FastEthernet0/5 unassigned YES unset up down
FastEthernet0/6 unassigned YES unset up down
FastEthernet0/7 unassigned YES unset up down
FastEthernet0/8 unassigned YES unset up down
FastEthernet0/9 unassigned YES unset up down
FastEthernet0/10 unassigned YES unset up down
FastEthernet0/11 unassigned YES unset up down
FastEthernet0/12 unassigned YES unset up down
FastEthernet0/13 unassigned YES unset up down
FastEthernet0/14 unassigned YES unset up up
FastEthernet0/15 unassigned YES unset up up
Port-channel1 unassigned YES unset up up
Vlan1 unassigned YES unset up up
sw2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
sw2(config)#interface range f0/14 - 15
sw2(config-if-range)#channel-group 1 mode on
Creating a port-channel interface Port-channel1
sw2(config-if-range)#
sw2#show ip in br
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset up down
FastEthernet0/1 unassigned YES unset up up
FastEthernet0/2 unassigned YES unset up up
FastEthernet0/3 unassigned YES unset up up
FastEthernet0/4 unassigned YES unset up down
FastEthernet0/5 unassigned YES unset up down
FastEthernet0/6 unassigned YES unset up down
FastEthernet0/7 unassigned YES unset up down
FastEthernet0/8 unassigned YES unset up down
FastEthernet0/9 unassigned YES unset up down
FastEthernet0/10 unassigned YES unset up down
FastEthernet0/11 unassigned YES unset up down
FastEthernet0/12 unassigned YES unset up down
FastEthernet0/13 unassigned YES unset up down
FastEthernet0/14 unassigned YES unset up up
FastEthernet0/15 unassigned YES unset up up
Port-channel1 unassigned YES unset up up
Vlan1 unassigned YES unset up up
3. VTP分别在各个交换机上配置VLAN2,VLAN3,VLAN4四个VLAN【包含VLAN1】如下所示:
sw1#vl da
sw1(vlan)#vlan 2 name v2
VLAN 2 added:
Name: v2
sw1(vlan)#apply
APPLY completed.
sw1(vlan)#vlan 3 name v3
VLAN 3 added:
Name: v3
sw1(vlan)#apply
APPLY completed.
sw1(vlan)#vlan 4 name v4
VLAN 4 added:
Name: v4
sw1(vlan)#apply
APPLY completed.
sw1(vlan)#exit
APPLY completed.
Exitin
sw1#show vlan-switch
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/0, Fa0/4, Fa0/5, Fa0/6
Fa0/7, Fa0/8, Fa0/9, Fa0/10
Fa0/11, Fa0/12, Fa0/13
2 v2 active
3 v3 active
4 v4 active
1002 fddi-default active
1003 trcrf-default active
1004 fddinet-default active
1005 trbrf-default active
测试其他的交换机有没有学的VLAN信息:
sw2#show vlan-switch
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/0, Fa0/4, Fa0/5, Fa0/6
Fa0/7, Fa0/8, Fa0/9, Fa0/10
Fa0/11, Fa0/12, Fa0/13
2 v2 active
3 v3 active
4 v4 active
1002 fddi-default active
1003 trcrf-default active
1004 fddinet-default active
1005 trbrf-default active
sw3#show vlan-switch
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/0, 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
2 v2 active
3 v3 active
4 v4 active
1002 fddi-default active
1003 trcrf-default active
1004 fddinet-default active
1005 trbrf-default active
sw4#show vlan-switch
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/0, 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
2 v2 active
3 v3 active
4 v4 active
1002 fddi-default active
1003 trcrf-default active
1004 fddinet-default active
1005 trbrf-default active
sw5#show vlan-switch
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/0, 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
2 v2 active
3 v3 active
4 v4 active
1002 fddi-default active
1003 trcrf-default active
1004 fddinet-default active
1005 trbrf-default active
4.将SWITCH1配置为VLAN1、VLAN3的根桥,VLAN2、VLAN4的次根桥
将SWITCH2配置为VLAN2、VLAN4的根桥,VLAN1、VLAN3的次根桥
SW1:
sw1(config)#spanning-tree vlan 1 root primary
VLAN 1 bridge priority set to 8192
VLAN 1 bridge max aging time unchanged at 20
VLAN 1 bridge hello time unchanged at 2
VLAN 1 bridge forward delay unchanged at 15
sw1(config)#spanning-tree vlan 3 root primary
VLAN 3 bridge priority set to 8192
VLAN 3 bridge max aging time unchanged at 20
VLAN 3 bridge hello time unchanged at 2
VLAN 3 bridge forward delay unchanged at 15
sw1(config)#spanning-tree vlan 2 root secondary
VLAN 2 bridge priority set to 16384
VLAN 2 bridge max aging time unchanged at 20
VLAN 2 bridge hello time unchanged at 2
VLAN 2 bridge forward delay unchanged at 15
sw1(config)#spanning-tree vlan 4 root secondary
VLAN 4 bridge priority set to 16384
VLAN 4 bridge max aging time unchanged at 20
VLAN 4 bridge hello time unchanged at 2
VLAN 4 bridge forward delay unchanged at 15
SW2:
sw2(config)#spanning-tree vlan 2 root primary
VLAN 2 bridge priority set to 8192
VLAN 2 bridge max aging time unchanged at 20
VLAN 2 bridge hello time unchanged at 2
VLAN 2 bridge forward delay unchanged at 15
sw2(config)#spanning-tree vlan 4 root primary
VLAN 4 bridge priority set to 8192
VLAN 4 bridge max aging time unchanged at 20
VLAN 4 bridge hello time unchanged at 2
VLAN 4 bridge forward delay unchanged at 15
sw2(config)#spanning-tree vlan 1 root secondary
VLAN 1 bridge priority set to 16384
VLAN 1 bridge max aging time unchanged at 20
VLAN 1 bridge hello time unchanged at 2
VLAN 1 bridge forward delay unchanged at 15
sw2(config)#spanning-tree vlan 3 root secondary
VLAN 3 bridge priority set to 16384
VLAN 3 bridge max aging time unchanged at 20
VLAN 3 bridge hello time unchanged at 2
VLAN 3 bridge forward delay unchanged at 15
sw2(config)#exit
用SW3进行测试上面的配置结果:
sw3#show spanning-tree br
VLAN1
Spanning tree enabled protocol ieee
Root ID Priority 8192
Address cc00.0b70.0000
Cost 19
Port 2 (FastEthernet0/1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address cc00.0da8.0000
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 8192 cc00.0b70.0000 128.2
FastEthernet0/2 128.3 128 19 BLK 12 16384 cc00.0234.0000 128.2
VLAN2
Spanning tree enabled protocol ieee
Root ID Priority 8192
Address cc00.0234.0001
Cost 19
Port 3 (FastEthernet0/2)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address cc00.0da8.0001
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 12 16384 cc00.0b70.0001 128.2
FastEthernet0/2 128.3 128 19 FWD 0 8192 cc00.0234.0001 128.2
VLAN3
Spanning tree enabled protocol ieee
Root ID Priority 8192
Address cc00.0b70.0002
Cost 19
Port 2 (FastEthernet0/1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address cc00.0da8.0002
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 8192 cc00.0b70.0002 128.2
FastEthernet0/2 128.3 128 19 BLK 12 16384 cc00.0234.0002 128.2
VLAN4
Spanning tree enabled protocol ieee
Root ID Priority 8192
Address cc00.0234.0003
Cost 19
Port 3 (FastEthernet0/2)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address cc00.0da8.0003
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 12 16384 cc00.0b70.0003 128.2
FastEthernet0/2 128.3 128 19 FWD 0 8192 cc00.0234.0003 128.2
5 。关闭所有SWITCH1端口观察VLAN1、VLAN3的根桥变换
sw3#show spanning-tree br
VLAN1
Spanning tree enabled protocol ieee
Root ID Priority 16384
Address cc00.0234.0000
Cost 19
Port 3 (FastEthernet0/2)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address cc00.0da8.0000
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 19 32768 cc00.0da8.0000 128.2
FastEthernet0/2 128.3 128 19 LRN 0 16384 cc00.0234.0000 128.2
VLAN3
Spanning tree enabled protocol ieee
Root ID Priority 16384
Address cc00.0234.0002
Cost 19
Port 3 (FastEthernet0/2)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address cc00.0da8.0002
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 19 32768 cc00.0da8.0002 128.2
FastEthernet0/2 128.3 128 19 LRN 0 16384 cc00.0234.0002 128.2
分析: 很明显VLNA 1 和VLAN 3 根网桥在向SW2学习中。
6.查看SWITCH3的F0/1口是否对于VLAN4是BLOCK的,
sw3#show spanning-tree br
VLAN4
Spanning tree enabled protocol ieee
Root ID Priority 8192
Address cc00.0234.0003
Cost 19
Port 3 (FastEthernet0/2)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address cc00.0da8.0003
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 19 32768 cc00.0da8.0003 128.2
FastEthernet0/2 128.3 128 19 FWD 0 8192 cc00.0234.0003 128.2
7.打开SW1上所有的端口,再次用SW3查看VLAN 1 和VLAN 3的变化。
sw3#show spanning-tree br
VLAN1
Spanning tree enabled protocol ieee
Root ID Priority 8192
Address cc00.0b70.0000
Cost 19
Port 2 (FastEthernet0/1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address cc00.0da8.0000
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 8192 cc00.0b70.0000 128.2
FastEthernet0/2 128.3 128 19 BLK 12 16384 cc00.0234.0000 128.2
VLAN3
Spanning tree enabled protocol ieee
Root ID Priority 8192
Address cc00.0b70.0002
Cost 19
Port 2 (FastEthernet0/1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address cc00.0da8.0002
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 8192 cc00.0b70.0002 128.2
FastEthernet0/2 128.3 128 19 BLK 12 16384 cc00.0234.0002 128.2
如上显示,当打开所有的SW1端口后,VLAN1 和 VLAN 3 根桥以转回了SW1。
8.并实现VLAN3在SWITCH3上的上行链路切换,并再次关掉所有SW1上面的端口进行验证。
sw3(config)#spanning-tree uplinkfast
sw3#show spanning-tree br
VLAN3
Spanning tree enabled protocol ieee uplinkfast enabled
Root ID Priority 16384
Address cc00.0234.0002
Cost 3019
Port 3 (FastEthernet0/2)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 49152
Address cc00.0da8.0002
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 3019 LRN 3019 49152 cc00.0da8.0002 128.2
FastEthernet0/2 128.3 128 3019 FWD 0 16384 cc00.0234.0002 128.2
分析:从上面的结果可以看到,当配置了上行速链路后,关掉SW1上所有的端口后,VLAN3上阻塞的端口不用经过侦听和学习,而直接进入了转发状态。
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