基站闪断故障案例分析
摘要：某IPRAN站点在运行过程中出现频繁的设备闪断故障，造成此站点下挂4个3G站、3个4G站业务频繁闪断。
背景
2016年8月24日上午在网优人员给局方维护人员打来电话，说有数个站点出现频繁断站，然后过几分钟就好；我方工程师在收到局方告知后，立即与维护人员取得联系，为了不影响局方的业务以及考核指标，决定先将此站点下挂的站点端口进行关闭处理。
问题描述及排查
1. 登录到闪断的设备上，一般成环的节点很少会出现瞬断，但是不排除。首先检查瞬断节点的收发光功率；如果没问题就逐条检查环上的其他节点的光功率。一般情况下是光口实际收光超出临界值；
zxr10#show perf-value interface gei_5/1 laser-basis-cur(mA) : 6.8160 laser-basis-min(mA) : 6.8160 laser-basis-max(mA) : 6.8480
laser-temp-cur(deg) : 39.8430 laser-temp-min(deg) : 39.5620 laser-temp-max(deg) : 39.8430
optical-send-cur(dBm) : -6.1650 optical-send-min(dBm) : -6.1670 optical-send-max(dBm) : -6.1650
optical-rcv-cur(dBm) : -7.5030 optical-rcv-min(dBm) : -7.5100 optical-rcv-max(dBm) : -7.5000
send-bandwidth-usage : 0.0131 rcv-bandwidth-usage : 0.0213 zxr10#show perf-value interface gei_6/1 laser-basis-cur(mA) : 17.7500 laser-basis-min(mA) : 17.7500 laser-basis-max(mA) : 17.8000
laser-temp-cur(deg) : 33.2260 laser-temp-min(deg) : 33.2260 laser-temp-max(deg) : 33.2260
optical-send-cur(dBm) : -5.9190 optical-send-min(dBm) : -5.9190 optical-send-max(dBm) : -5.8850
optical-rcv-cur(dBm) : -7.2490 optical-rcv-min(dBm) : -7.3680 optical-rcv-max(dBm) : -7.2490
send-bandwidth-usage : 0.0016 rcv-bandwidth-usage : 0.0008
2. 检查设备温度，看风扇状态：
设备温度过高会导致板卡假死，当温度降到板卡可以承受的温度的时候，板卡又会起来，所以就会出现闪断。
zxr10#show version
ZXR10 Router Operating System Software, ZTE Corporation ZXR10 ROS Version V4.08.34
ZXCTN 6220 Software, Version ZXCTN 620063006220 V2.10.00P02B10, RELEASE SOFTWARE
Copyright (c) 2001-2014 by ZTE Corporation Compiled Apr 24 2015, 18:46:39
System image files are flash: System uptime is 244 day(s), 16 hour(s), 53 minute(s)
[SCCU, panel 1, master]
Main Processor: PowerPC MPC8544 Processor
System Memory : 1024M bytes, System FLASH : 128M bytes System NVRAM: 8K bytes, System Temperature: 41℃
System Serial : 16383 , System BaudRate : 9600 System Clock: PTP stratum 3 Board Type: RSCCP2
Serial Number: 269776601152, Part Number: 123353851003 Main CPLD1 Version: V1.4, Main CPLD2 Version: V1.4 CPU CPLD Version : N/A, PCI CPLD Version : N/A FPGA Version: V6.1 , Main PCB Number: 101001 [SCCU, panel 2, slave]
Main Processor: PowerPC MPC8544 Processor
System Memory : 1024M bytes , System FLASH: 128M bytes System NVRAM: 8K bytes, System Temperature: 43℃ System Serial: 16383 , System BaudRate: 9600 System Clock : PTP stratum 3 Board Type : RSCCP2
Serial Number: 269776600138, Part Number: 123353851003 Main CPLD1 Version: V1.4, Main CPLD2 Version: V1.4 CPU CPLD Version : N/A , PCI CPLD Version: N/A FPGA Version: V6.1 , Main PCB Number: 101001 [NPCI, panel 1]
Main Processor : W90N740 Processor
System Memory: 16M bytes , System Temperature: N/A Board Type: R4EGC , Logic Board Type : R4EGC_ETH Port Number : 4
Serial Number : 269494602008, Part Number : 123352651015 Main CPLD Version : V1.8
FPGA Version : V0.8 , Main PCB Number : 081001 [NPCI, panel 2]
Main Processor : MPC8321 Processor
System Memory: 128M bytes , System Temperature: 43℃ Board Type : R16E1F, Logic Board Type : (TDM+IMA) Port Number : 16
Serial Number : 269539101105 , Part Number: 123352651023 Main CPLD Version : V2.3
FPGA Version: V2.1 , Main PCB Number : 080902 [NPCI, panel 5]
Main Processor : W90N740 Processor
System Memory: 16M bytes, System Temperature: 43℃ Board Type: R4EGC , Logic Board Type : R4EGC_ETH Port Number: 4
Serial Number: 269494601680, Part Number : 123352651015 Main CPLD Version : V1.8
FPGA Version : V0.8 , Main PCB Number : 081001 [NPCI, panel 6]
Main Processor : W90N740 Processor