CCNP(BCMSN)实验：配置MST

CCNP(BCMSN)实验：配置MST

第二步：为了同步vlan信息，我们配置vtp

s1(config)#int r f0/19 ,f0/24s1(config-if-range)#sw trunk encapsulation dot1q s1(config-if-range)#sw mo trunk

s2(config)#vtp domain libos2(config)#int f0/21 s2(config-if-range)#sw tr en ds2(config-if-range)#sw mo tr

SW3上同理

第三步：配置MST

s1(config)#sps1(config)#spanning-tree mode mst s1(config)#spanning-tree mst configuration s1(config-mst)#name libos1(config-mst)#revision 1s1(config-mst)#instance 1 vlan 1-2s1(config-mst)#instance 2 vlan 3-4

s1(config)#spanning-tree mst 1 priority 12288s1(config)#spanning-tree mst 2 priority 8192

s2(config)#spanning-tree mode mst s2(config)#spanning-tree mst configuration s2(config-mst)#name libo

s2(config-mst)#revision 1s2(config-mst)#instance 1 vlan 1-2s2(config-mst)#instance 2 vlan 3-4s2(config-mst)#exi

s2(config)#spanning-tree mst 1 priority 8192s2(config)#spanning-tree mst 2 priority 12288//以上的配置说明了，让s1成为实例2的根桥，让s2成为实例1的根桥

在SW3上做相同的配置，不过不做优先级的更改，我们会想到，sw3的一个接口在一个实例中为转发状态，而在另一个实验中处于阻塞状态

第四步：show 相关

s3#sh spanning-tree

MST0Spanning tree enabled protocol mstpRoot ID Priority 4096Address 000b.be3d.4e00Cost 0Port 19 (FastEthernet0/19)Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 4096 (priority 4096 sys-id-ext 0)Address 0011.209a.cf80Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Interface Role Sts Cost Prio.Nbr Type

Fa0/19 Root FWD 200000 128.19 P2p Fa0/21 Desg FWD 200000 128.21 P2p

MST1Spanning tree enabled protocol mstpRoot ID Priority 8193Address 0011.20a2.2880Cost 200000Port 21 (FastEthernet0/21)Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)Address 0011.209a.cf80Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Interface Role Sts Cost Prio.Nbr Type

Fa0/19 Altn BLK 200000 128.19 P2p Fa0/21 Root FWD 200000 128.21 P2p

MST2Spanning tree enabled protocol mstpRoot ID Priority 8194Address 000b.be3d.4e00Cost 200000Port 19 (FastEthernet0/19)Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 32770 (priority 32768 sys-id-ext 2)Address 0011.209a.cf80Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Interface Role Sts Cost Prio.Nbr Type

Fa0/19 Root FWD 200000 128.19 P2p Fa0/21 Altn BLK 200000 128.21 P2p

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