PVST 实验

4507#show spanning-tree

VLAN0001

Spanning tree enabled protocol ieee

Root ID Priority 24577

Address 001d.4555.a080

This bridge is the root

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 24577 (priority 24576 sys-id-ext 1)

Address 001d.4555.a080

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Aging Time 300

Interface Role Sts Cost Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Gi3/1 Desg FWD 19 128.129 P2p

Gi3/2 Desg FWD 19 128.130 P2p

Gi3/3 Desg FWD 19 128.131 P2p

Gi3/4 Desg FWD 19 128.132 P2p

Gi3/5 Desg FWD 19 128.133 P2p

Gi3/9 Desg FWD 19 128.137 P2p

Gi3/10 Desg FWD 19 128.138 P2p

Gi3/11 Desg FWD 19 128.139 P2p

Gi3/12 Desg FWD 19 128.140 P2p

Gi3/15 Desg FWD 19 128.143 P2p

 

黄色部分显示根网桥的信息（根网桥优先级、根网桥MAC地址），如果本网桥为根，它会显示，This bridge is root

蓝色部分为本交换机的信息（本网桥优先级、本网桥MAC地址）

 

4507#show spanning-tree

VLAN0002

Spanning tree enabled protocol ieee

Root ID Priority 32773

Address 0007.0e6f.d580

Cost 3019

Port 138 (GigabitEthernet3/10)

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 49157 (priority 49152 sys-id-ext 5)

Address 001d.4555.a080

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Aging Time 300

Uplinkfast enabled

Interface Role Sts Cost Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Gi3/1 Desg FWD 3019 128.129 P2p

Gi3/2 Altn BLK 3019 128.130 P2p

Gi3/3 Altn BLK 3019 128.131 P2p

Gi3/4 Desg FWD 3019 128.132 P2p

 

黄色部分显示根网桥的信息（根网桥优先级、根网桥MAC地址），如果本网桥不是根，它还会显示哪个是根端口，到根的Cost 是多少

蓝色部分为本交换机的信息（本网桥优先级、本网桥MAC地址）