5820V2 堆叠分裂，查看诊断日志，如何判断是什么原因导致堆叠分裂的？

猜想：

1.slot2电源掉电

logbuffer信息如下：

%@7764%Jul 22 03:35:55:403 2019 设备名称 DRVPLAT/4/DrvDebug: The port Forty1/0/51 can't receive irf pkt and has been changed to inactive status, please check. 

%@7765%Jul 22 03:35:55:403 2019 设备名称 DRVMNT/3/ERRORCODE: ErrCode = 1866268676, IRF: STM Hello Check Fail. 

%@7766%Jul 22 03:35:55:403 2019 设备名称 DRVPLAT/4/DrvDebug: The port Forty1/0/52 can't receive irf pkt, please check. 

%@7767%Jul 22 03:35:55:825 2019 设备名称 DRVPLAT/4/DrvDebug: The port Forty1/0/51 has been changed to active status.

 %@7768%Jul 22 03:36:02:709 2019 设备名称 STM/2/STM_LINK_STATUS_TIMEOUT: IRF port 1 is down because heartbeat timed out. 

%@7769%Jul 22 03:36:02:884 2019 设备名称 STM/3/STM_LINK_STATUS_DOWN: IRF port 1 is down. 

%@7770%Jul 22 03:36:02:926 2019 设备名称 DEV/3/BOARD_REMOVED: Board was removed from slot 2, type is S5820V2-52QF. 

%@7771%Jul 22 03:36:02:935 2019 设备名称 LAGG/6/LAGG_INACTIVE_PHYSTATE: Member port FGE2/0/49 of aggregation group BAGG1 changed to the inactive state, because the physical state of the port is down. 

%@7772%Jul 22 03:36:02:936 2019 设备名称 LAGG/6/LAGG_INACTIVE_PHYSTATE: Member port FGE2/0/50 of aggregation group BAGG1 changed to the inactive state, because the physical state of the port is down. 

%@7773%Jul 22 03:38:30:115 2019 设备名称 CFGMAN/5/CFGMAN_CFGCHANGED: -EventIndex=5-CommandSource=snmp-COnfigSource=startup-COnfigDestination=running; Configuration is changed.