USG6306（V500R001C30SPC300）和S5700对接光口不亮

USG6306（V500R001C30SPC300）和S5700对接光口不亮

1：首先排查两端光模块是否一致，发现两端的光模块型号一致

2：然后查看光纤是否满足需求，发现光纤颜色是橙色为多模光纤符合要求，单模光纤为黄色

3：最后在防火墙和交换机上查看收发光信息

交换机：发光正常收光不正常，可能对端光模块原因或者光纤有问题

防火墙：

GigabitEthernet1/0/5 current state : DOWN
Line protocol current state : DOWN
Description:Huawei, USG6306 Series, GigabitEthernet1/0/5 Interface
Route Port,The Maximum Transmit Unit is 1500
Internet Address is 192.168.7.1/24
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 58f9-8708-9119
Media type is twisted pair, loopback not set, promiscuous mode not set
The Port is COMBO Port, Current Media is Copper
Unknown-speed mode, unknown-duplex mode, link type is auto negotiation
SFP is in position!
Vendor Name: huawei
Vendor PN: 02315204
SN: CE42QQ3NE      
Transceiver max BW: 1G
Transceiver Mode: MultiMode
WaveLengh: 850nm 
Transmission Distance: 500m
Current SFP module temperature(-40.00c/85.00c): 31.00 c
Current SFP module supply(2.95/3.64V): 3.30 V
Current SFP module Tx bias(1.07/18.56mA): 0.00 mA
Current Rx Power(dBM)                    :-5.46
Default Rx Power High Threshold(dBM)     :0.00
Default Rx Power Low  Threshold(dBM)     :-16.97
Current Tx Power(dBM)                    :-50.00
Default Tx Power High Threshold(dBM)     :0.00
Default Tx Power Low  Threshold(dBM)     :-12.50

发现防火墙互连接口1/0/5口，只有收光没有发光，
Current Media is Copper,且当前状态为电口

USG6306的G1/0/5号接口是光电复用口，客户在插光模块之前，先插了网线，复用口是自动识别传输介质，导致优先把端口设置为电口模式，导致光模块无法识别，无法发光

1：把端口强制设置为光口

2：或者把网线和光模块都拔出，然后重新插入光模块

如果是光电复用口不建议同时插上网线和光模块，如果同时插上可能导致端口状态识别错误导致端口无法正常UP