H3C S9505E：单板异常重启

在display logbuffer中，有以下告警信息，在这个时候Chassis 1 slot 2发生了异常重启，重启后恢复正常，请问是什么原因导致的。

%Nov 8 15:16:43:778 2021 DCA-HST-ZDS01 DSTM/1/DRV_DSTM: OAM, IRF member port Ten-GigabitEthernet1/2/0/1 does not work in receive direction. 

%Nov 8 15:16:44:188 2021 DCA-HST-ZDS01 IFNET/3/LINK_UPDOWN: Ten-GigabitEthernet2/2/0/1 link status is DOWN. 

%Nov 8 15:16:44:253 2021 DCA-HST-ZDS01 DEVD/3/BOARD REBOOT: Chassis 1 slot 2 need to be rebooted automatically! 

%Nov 8 15:16:45:300 2021 DCA-HST-ZDS01 DEVM/2/BOARD_STATE_FAULT: Board state changes to FAULT on Chassis 1 Slot 2, type is LSR1XP16REB1. 

%Nov 8 15:17:32:395 2021 DCA-HST-ZDS01 SSH/6/SSH_LOGIN: STEL user checklist (IP: 172.21.16.149) logged in successfully. 

%Nov 8 15:18:39:781 2021 DCA-HST-ZDS01 DEVM/4/BOARD_LOADING: Board is loading file on Chassis 1 Slot 2. 

%Nov 8 15:18:41:348 2021 DCA-HST-ZDS01 DEVM/5/LOAD_FINISHED: Board has finished loading file on Chassis 1 Slot 2.

用诊断工具显示有以下重启原因，麻烦帮忙看一下是什么原因导致的单板重启。

Recent records:
--------------------Executed action records:--------------------
Slot  2:
   1. 2021-11-08, 15:23:23 hot-rebooted by BOARDSTATE.
reason:BRD-STAT. the action executed 2 times.