第一个问题:光缆的区别?
1、外观
2、传输距离
3、波长
4、芯径
第二个问题:两台交换机如何通过光缆进行互联?
1、光缆(明确光缆的类型、长度)
1、交换机
2、光模块(明确光模块的类型、速率)
3、光纤跳线 (明确跳线的类型、长度、速率)
5、耦合器(明确耦合器的类型)
6、尾纤(明确跳线的类型、长度、速率)
7、光纤配线架或者光纤终端盒(明确具体的类型)
第三个问题:上述两台交换机之间无法通信?
1、交换机的带电状态---->交换机接口故障--->替换法
2、接口状态-->down
3、检查模块-->替换新模块或者现有正常使用--->
4、检查跳线-->替换法
5、更换光纤配线架上未使用的光纤接口--->替换法
6、检查交换机收发功率--->1、查看交换机接口是否支持查看-->2、使用光功率计进行测试(测试范围,先打光后测试光
)---->
7、耦合器对接线未插接牢固-->光缆熔接有问题
8、光电复用口-->开启光口
9、光接口协商速率问题
备注:查看接口光功率(光模块需被网络设备识别)
run show interfaces diagnostics optics xe-2/1/1 //juniper网络设备
dis transceiver diagnosis interface GigabitEthernet 1/0/14 //华三设备
show intface gx/x transceiver //锐捷网络设备
interface
例如:
////////////华三网络设备///////////////////////
<ZongHeLou_5F-Huiju>dis transceiver diagnosis interface GigabitEthernet 1/0/14
GigabitEthernet1/0/14 transceiver diagnostic information:
Current diagnostic parameters:
Temp.( Voltage(V) Bias(mA) RX power(dBm) TX power(dBm)
34 3.34 7.04 -5.96 -5.05
Alarm thresholds:
Temp.( Voltage(V) Bias(mA) RX power(dBm) TX power(dBm)
High 88 3.80 17.00 0.00 -2.00
Low -23 2.80 1.00 -16.99 -12.50
<ZongHeLou_5F-Huiju>
//////Juniper网络设备//////////////////
admin@YiKaTong_DC-MX960# run show interfaces diagnostics optics xe-2/1/1
Physical interface: xe-2/1/1
Laser bias current : 34.130 mA
Laser output power : 0.6870 mW / -1.63 dBm
Module temperature : 21 degrees C / 70 degrees F
Laser rx power : 0.9342 mW / -0.30 dBm
Laser bias current high alarm : Off
Laser bias current low alarm : Off
Laser bias current high warning : Off
Laser bias current low warning : Off
Laser output power high alarm : Off
Laser output power low alarm : Off
Laser output power high warning : Off
Laser output power low warning : Off
Module temperature high alarm : Off
Module temperature low alarm : Off
Module temperature high warning : Off
Module temperature low warning : Off
Laser rx power high alarm : Off
Laser rx power low alarm : Off
Laser rx power high warning : Off
Laser rx power low warning : Off
Module not ready alarm : Off
Module power down alarm : Off
Tx data not ready alarm : Off
Tx not ready alarm : Off
Tx laser fault alarm : Off
Tx CDR loss of lock alarm : Off
Rx not ready alarm : Off
Rx loss of signal alarm : Off
Rx CDR loss of lock alarm : Off
Laser bias current high alarm threshold : 80.000 mA
Laser bias current low alarm threshold : 10.000 mA
Laser bias current high warning threshold : 75.000 mA
Laser bias current low warning threshold : 12.000 mA
Laser output power high alarm threshold : 1.2580 mW / 1.00 dBm
Laser output power low alarm threshold : 0.2230 mW / -6.52 dBm
Laser output power high warning threshold : 1.1210 mW / 0.50 dBm
Laser output power low warning threshold : 0.2510 mW / -6.00 dBm
Module temperature high alarm threshold : 80 degrees C / 176 degrees F
Module temperature low alarm threshold : -15 degrees C / 5 degrees F
Module temperature high warning threshold : 75 degrees C / 167 degrees F
Module temperature low warning threshold : -10 degrees C / 14 degrees F
Laser rx power high alarm threshold : 1.2589 mW / 1.00 dBm
Laser rx power low alarm threshold : 0.0100 mW / -20.00 dBm
Laser rx power high warning threshold : 1.0000 mW / 0.00 dBm
Laser rx power low warning threshold : 0.0158 mW / -18.01 dBm
////////////锐捷网络设备////////////////////
To-Jiaoxuelou#show interfaces transceiver
========Interface GigabitEthernet 0/1========
Transceiver Type : 1000BASE-LX-SFP
Connector Type : LC
Wavelength(nm) : 1310
Transfer Distance :
SMF fiber
-- 10km
50/125 um OM2 fiber
-- 550m
62.5/125 um OM1 fiber
-- 550m
Digital Diagnostic Monitoring : YES
Vendor Serial Number : FNS172830XF
========Interface GigabitEthernet 0/2========
Transceiver Type : 1000BASE-LX-SFP
Connector Type : LC
Wavelength(nm) : 1310
Transfer Distance :
SMF fiber
-- 10km
Digital Diagnostic Monitoring : NO
Vendor Serial Number : G1HD6B1022424
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