在交换机 SWA 上执行 display interface Ethernet 1/0/1 命令后,输出信息如下 : [SWA]display interface Ethernet 1/0/1 Ethernetl/0/1 current state: UP PVID: 10 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 10 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q Port priority: 0 从以上输出可以判断