交换机在江湖 官方号 2017-7-12 16:13:39 最新回复：2017-07-12 17:11:22
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涉及产品和版本
框式V200R006C00SPC500

组网情况
组网信息不涉及，仅单设备故障。

现象描述
S9300在早上7点20左右的时间出现了一次异常重启，任意视图执行命令display reset-reason，设备未记录重启原因；执行命令display version，发现设备启动后工作时间为38分钟，说明设备的确重启过。
<HUAWEI>  display reset-reason 
Info: The LPU frame[1] board[1] does not have reset records.   
Info: The LPU frame[1] board[2] does not have reset records.  
Info: The LPU frame[1] board[3] does not have reset records.  
Info: The LPU frame[1] board[4] does not have reset records.  
Info: The LPU frame[1] board[5] does not have reset records.  
 
<HUAWEI> display version                                                              
Huawei Versatile Routing Platform Software                                       
VRP (R) software, Version 5.160 (S9300 V200R006C00SPC500)                       
Copyright (C) 2000-2017 HUAWEI TECH CO., LTD                                     
HUAWEI S9303 Terabit Routing Switch uptime is 0 week, 0 day, 0 hours, 38 minutes   
 
... ...
原因分析

设备异常启动的一些原因并不能全部由display reset-reason记录，还需要继续排查日志告警信息，进一步确认。
处理步骤

查看日志信息，发现早上7点18分，设备记录如下日志告警信息，设备冷启动一次，存在掉电重启。需要进一步排查设备供电环境，经确认是外部供电环境异常导致。
<HUAWEI> display trapbuffer                                                           
Trapping buffer configuration and contents : enabled                             
Allowed max buffer size : 1024                                                   
Actual buffer size : 256                                                         
Channel number : 3 , Channel name : trapbuffer                                   
Dropped messages : 0                                                             
Overwritten messages : 70                                                        
Current messages : 256                                           
                                                             
#May 12 2017 07:18:00 cuqiao9303 ENTMIB/4/TRAP: OID 1.3.6.1.2.1.47.2.0.1 Entity MIB change. 
#May 12 2017 07:18:00 cuqiao9303 SNMP/4/COLDSTART:OID 1.3.6.1.6.3.1.1.5.1 coldStart. 
#May 12 2017 07:17:58 cuqiao9303 BASETRAP/4/POWERON: OID 1.3.6.1.4.1.2011.5.25.129.2.3.2 The power supply is on.(Index=69206025, Severity=6, ProbableCause=1024, EventType=5, ContainedIn=69206021, PhysicalName="PWR2") 
#May 12 2017 07:17:58 cuqiao9303 BASETRAP/4/POWERON: OID 1.3.6.1.4.1.2011.5.25.129.2.3.2 The power supply is on.(Index=68943881, Severity=6, ProbableCause=1024, EventType=5, ContainedIn=68943877, PhysicalName="PWR1")
总结与建议

设备异常重启，不仅需要看display reset-reason命令回显信息，还需排查日志告警信息。本帖最后由 交换机在江湖 于 2017-07-12 16:15 编辑