处理交换机光路时，特别麻烦，因为手头也没光功率测量计，所以把光模块接入后，如果undo shut后，还不懂，就比较难搞了

　　现在在网上找到可以查看光功率的命令，分享下

　　[H3C]_hidecmd

　　Now you enter a hidden command view for developer's testing, some commands may

　　affect operation by wrong use, please carefully use it with our engineer's

　　direction.

　　[H3C-hidecmd]_display transceiver ?

　　diagnosis Diagnostic information

　　interface Display by interface

　　register Register information

　　[H3C-hidecmd]_display transceiver diagnosis interface GigabitEthernet 1/0/25

　　GigabitEthernet1/0/25 transceiver diagnostic information:

　　Current diagnostic parameters:

　　Temp(°C) Voltage(V) Bias(mA) RX power(dBm) TX power(dBm)

　　54 3.41 17.65 -7.45 -5.85

　　Alarm thresholds:

　　Temp(°C) Voltage(V) Bias(mA) RX power(dBm) TX power(dBm)

　　High 85 3.70 65.00 0.97 0.97

　　Low -10 2.90 10.00 -40.00 -13.01

　　Parameters when first used on 2000.4.26:

　　Temp(°C) Voltage(V) Bias(mA) RX power(dBm) TX power(dBm)

　　39 3.41 16.35 -7.21 -5.85

　　Total account of alarms: 15

　　Latest occurrence of different alarms:

　　Type Date Description

　　Temp N/A N/A

　　Voltage N/A N/A

　　Bias N/A N/A

　　RX power 2014.04.09 RX power low

　　TX power N/A N/A

　　TX N/A N/A

　　RX N/A N/A

　　OTHER N/A N/A

　　Latest three alarms:

　　Date Description

　　2014.04.07 RX power low

　　2014.04.09 RX power low

　　2014.04.09 RX power low

　　以下是端口没有插上模块的

　　[H3C-hidecmd]display transceiver diagnosis interface GigabitEthernet 1/0/27

　　Error: The transceiver is absent.

　　[H3C-hidecmd]display transceiver diagnosis interface GigabitEthernet 1/0/28

　　Error: The transceiver is absent.