Spanning-Tree Port-priority Example

未調整前，Port-Priority先比較Port-ID   

調整介面Port-Priority值


!-----手動指定為vlan 4,44,52,63的Spanning-tree Root
spanning-tree vlan 4,44,52,63 root primary

! -----手動指定fa0/14的Spanning-tree Port-Priority為32
interface FastEthernet0/14
spanning-tree vlan 4,44,52,63 port-priority 32

! -----手動指定fa0/15的Spanning-tree Port-Priority為16
interface FastEthernet0/15
spanning-tree vlan 4,44,52,63 port-priority 16

驗證方式
#show spanning-tree vlan 44 detail
Port 15 (FastEthernet0/13) of VLAN0044 is blocking
Designated port id is 128.15, designated path cost 0  
-----預設值128

Port 16 (FastEthernet0/14) of VLAN0044 is blocking
Designated port id is 32.16, designated path cost 0
-----手動調整為32

Port 17 (FastEthernet0/15) of VLAN0044 is forwarding
Designated port id is 16.17, designated path cost 0   
-----手動調整為16 (值較低故優先)