e diagnostic level eonfig -register boot system flash power enable module shutdown( 接口模式)duplex flowcontrol send [desired |off|on] flowcontrol receive[desired |off |on] speed nonegotiate speed mac -address -table Cisco IOS 软件 mtu 9216 Channel -group<group>mode( 接口模式) switchport mode trunk(VLAN 数据库命令) udld switchport switchport mode access switchport access vlan o vtp spanning -tree backbonefast spanning -tree vlan spanning -tree portfast mls qos switchport mode dot1q tunnel show mac -address -table dynamic show etherchannel summary show interface counters show interface<type slot/port> Show mls cef show interface status show interface capabilities show monitor show spanning -tree Show mls qos show debugging show interfaces trunk show udld show vlan show vtp status clear mac -address -table