对其设置；100Base-FX多模/单模以太网端口的速率和工作模式由系统设置为100Mbit/s、全双工模式，用户不能对其进行设置。如果设置，则系统会给出提示“Can’t set the ports by the mode”。
l 汇聚端口不能设置双工、速率模式。
l 当希望在发送数据包的同时可以接收数据包，可以将端口设置为全双工状态；当希望端口在同一时刻只能发送或接收数据包时，可以将端口设置为半双工状态；当希望端口的双工状态由本端和对端协商而定的话，可以将端口设置为自协商方式，且不需进行本命令的设置。
缺省情况下，端口的速率为自协商方式，双工状态为自协商方式。
例：将以太网端口Ethernet0/1的速率设置为10Mbit/s，工作模式设置为全双工模式。
[Quidway-Ethernet0/1] speed 10
Please set the interface duplex mode,
Now it work in AUTO NEGOTIATION mode
[Quidway-Ethernet0/1] display interface ethernet0/1
Ethernet0/1 is down
Hardware is Fast Ethernet, Hardware address is 00e0-fc00-0010
auto_negotiation, 100_BASE_TX
Flow control is disable
The port belongs to these vlans:
Vlan 1
It is not a monitor port
It doesn’t belong to a port-aggregation
0 packets output
0 bytes, 0 multicasts, 0 broadcasts, 0 pauses
0 packets input
0 bytes, 0 multicasts, 0 broadcasts, 0 pauses
0 CRC errors
0 long frames
[Quidway-Ethernet0/1] duplex full
[Quidway-Ethernet0/1] display interface ethernet0/1
Ethernet0/1 is down
Hardware is Fast Ethernet, Hardware address is 00e0-fc00-0010
Full-duplex 10M 100_BASE_TX
Flow control is disable
The port belongs to these vlans:
Vlan 1
It is not a monitor port
It doesn’t belong to a port-aggregation
0 packets output
0 bytes, 0 multicasts, 0 broadcasts, 0 pauses
0 packets input
0 bytes, 0 multicasts, 0 broadcasts, 0 pauses
0 CRC errors
0 long frames