STP边缘接口配置
在所有access接口上启用快速收敛
S1(config)# spanning-tree portfast default
在端口上启用快速收敛
S1#configure terminal
S1(conifg)# int f0/18
S1(conifg-if)# spanning-tree portfast
S1(conifg-if)#end
S1(config)# spanning-tree portfast default
S1#configure terminal
S1(conifg)# int f0/18
S1(conifg-if)# spanning-tree portfast
S1(conifg-if)#end