9.3.3配置主干道 SwitchA# configure terminal Enter configuration commands, one per line. End with cntl/Z SwitchA(config)#interface fastethernet0/24 SwitchA( config-if)#switchport mode access Set trunking mode to ACCESS unconditionally dynamic set trunking mode to dynamically negotiate access or tr mode trunk Set trunking mode to tRunK unconditionally 图9-3-4配置主干道模式 SwitchA( config-if)#switchport mode dynamic auto Set trunking mode dynamic negotiation parameter to Auto desirable Set trunking mode dynamic negotiation parameter to DESIRABLE 图9-3-5配置动态主干道模式9.3.3 配置主干道 图9-3-4 配置主干道模式 图9-3-5 配置动态主干道模式