交换机命令show interfaces type0/port_#switchport|trunk用于显示中继连接的配置情况，下面是显示例子：
2950#show interface fastEthernet0/1 switchport
Name: fa0/1
Switchport: Enabled A．VLAN0 B．VLAN1 C．VLAN2 D．VLAN3

Administrative mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dotlq
Operational Trunking Encapsulation: dotlq
egotiation of Trunking: disabled
Access Mode VLAN: 0((inactive))
Trunking Native Mode VLAN: 1(default)
Trunking VLANs Enabled: all
Trunking VLANs active: 1, 2
Pruning VLANs Enabled: 2-1001
Priority for untagged frames: 0
Override vlan tag priority: FALSE
Voice VLAN: none
在这个例子中，端口fa0/1的链路模式被设置为______状态，默认的vlan是______。