[Issue Description]: After conect the SFP module the interface can not go up
<Huawei> display interface gigabitethernet0/0/0
GigabitEthernet0/0/0 current state : DOWN
Line protocol current state : DOWN
Description:HUAWEI, AR Series, GigabitEthernet0/0/0 Interface
Route Port,The Maximum Transmit Unit is 1500
Internet Address is 192.168.101.143/24
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 00e0-fc03-0202
Last physical up time : 2016-01-12 11:32
Last physical down time : 2016-01-12 11:32
Current system time: 2016-01-12 11:32
Port Mode: FORCE FIBER
Speed : 1000, Loopback: NONE
Duplex: FULL, Negotiation: ENABLE Mdi : -
Last 300 seconds input rate 0 bits/sec, 0 packets/sec
Last 300 seconds output rate 0 bits/sec, 0 packets/sec
Input peak rate 335248 bits/sec,Record time: 2016-01-12 11:32
Output peak rate 721224 bits/sec,Record time: 2016-01-12 11:32
The most common problem is forget to change the Port mode to fiber:
<Huawei> system-view
[Huawei] interface gigabitethernet 0/0/0
[Huawei-GigabitEthernet0/0/0] combo-port fiber
