(1)启用生成树:                 spanning-tree vlan vlan-list (vlan号)
 
(2)配置交换机为根网桥:   spanning-tree vlan vlan-list root primary (指定根网桥)| secondary(备用根网桥)
 
(3)修改交换机的优先级:   spanning-tree vlan vlan-list priority bridge-priority (网桥优先级)
 
(4)修改端口路径成本:      spanning-tree vlan vlan-list cost cost (成本)
 
(5)修改端口优先级:          spanning-tree vlan vlan-list port-priority priority 端口优先级)
 
(6) 配置上行速链路:         spanning-tree uplinkfast (上行链路)
 
(7)配置速端口:                 spanning-tree portfast (速端口)
 
(8)查看生成树:                 show spanning-tree
 
(9)查看某个VLAN的生成树详细信息:show spanning-tree vlan vlan-id detail