(1)启用生成树：                 spanning-tree vlan vlan-list（vlan号）
 
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(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