S7500E BGP 闪断

  ===============display version===============  
H3C Comware Software, Version 7.1.070, Release 7585P05
Copyright (c) 2004-2019 New H3C Technologies Co., Ltd. All rights reserved.
H3C S7506E uptime is 255 weeks, 3 days, 12 hours, 48 minutes
Last reboot reason : USER reboot

告警：

%Jul 30 17:16:23:762 2024 Z-SH-C2-5FB-CS-3.1 BFD/5/BFD_CHANGE_FSM: Sess[172.20.8.242/172.20.8.241, LD/RD:4099/33786, Interface:XGE1/5/0/35, SessType:Ctrl, LinkType:INET], Ver:1, Sta: UP->DOWN, Diag: 1 (Control Detection Time Expired)
%Jul 30 17:16:23:766 2024 Z-SH-C2-5FB-CS-3.1 BGP/5/BGP_STATE_CHANGED: BGP.: 172.20.8.241 state has changed from ESTABLISHED to IDLE for session down event received from BFD.
%Jul 30 17:16:23:796 2024 Z-SH-C2-5FB-CS-3.1 BFD/5/BFD_CHANGE_FSM: Sess[172.20.9.14/172.20.9.13, LD/RD:4100/33786, Interface:XGE2/5/0/36, SessType:Ctrl, LinkType:INET], Ver:1, Sta: UP->DOWN, Diag: 1 (Control Detection Time Expired)
%Jul 30 17:16:23:801 2024 Z-SH-C2-5FB-CS-3.1 BGP/5/BGP_STATE_CHANGED: BGP.: 172.20.9.13 state has changed from ESTABLISHED to IDLE for session down event received from BFD.
%Jul 30 17:16:23:905 2024 Z-SH-C2-5FB-CS-3.1 BFD/5/BFD_CHANGE_FSM: Sess[172.20.9.10/172.20.9.9, LD/RD:4098/33785, Interface:XGE1/5/0/36, SessType:Ctrl, LinkType:INET], Ver:1, Sta: UP->DOWN, Diag: 1 (Control Detection Time Expired)
%Jul 30 17:16:23:910 2024 Z-SH-C2-5FB-CS-3.1 BGP/5/BGP_STATE_CHANGED: BGP.: 172.20.9.9 state has changed from ESTABLISHED to IDLE for session down event received from BFD.
%Jul 30 17:16:23:937 2024 Z-SH-C2-5FB-CS-3.1 BFD/5/BFD_CHANGE_FSM: Sess[172.20.8.246/172.20.8.245, LD/RD:4101/33787, Interface:XGE2/5/0/35, SessType:Ctrl, LinkType:INET], Ver:1, Sta: UP->DOWN, Diag: 1 (Control Detection Time Expired)
%Jul 30 17:16:23:943 2024 Z-SH-C2-5FB-CS-3.1 BGP/5/BGP_STATE_CHANGED: BGP.: 172.20.8.245 state has changed from ESTABLISHED to IDLE for session down event received from BFD.
%Jul 30 17:16:25:069 2024 Z-SH-C2-5FB-CS-3.1 BGP/5/BGP_STATE_CHANGED: BGP.: 172.20.9.13 state has changed from OPENCONFIRM to ESTABLISHED.
%Jul 30 17:16:25:072 2024 Z-SH-C2-5FB-CS-3.1 BFD/5/BFD_CHANGE_FSM: Sess[172.20.9.14/172.20.9.13, LD/RD:4098/33790, Interface:XGE2/5/0/36, SessType:Ctrl, LinkType:INET], Ver:1, Sta: DOWN->INIT, Diag: 0 (No Diagnostic)
%Jul 30 17:16:25:087 2024 Z-SH-C2-5FB-CS-3.1 BFD/5/BFD_CHANGE_FSM: Sess[172.20.9.14/172.20.9.13, LD/RD:4098/33790, Interface:XGE2/5/0/36, SessType:Ctrl, LinkType:INET], Ver:1, Sta: INIT->UP, Diag: 0 (No Diagnostic)
%Jul 30 17:16:25:532 2024 Z-SH-C2-5FB-CS-3.1 BGP/5/BGP_STATE_CHANGED: BGP.: 172.20.8.241 state has changed from OPENCONFIRM to ESTABLISHED.
%Jul 30 17:16:25:534 2024 Z-SH-C2-5FB-CS-3.1 BFD/5/BFD_CHANGE_FSM: Sess[172.20.8.242/172.20.8.241, LD/RD:4099/33792, Interface:XGE1/5/0/35, SessType:Ctrl, LinkType:INET], Ver:1, Sta: DOWN->INIT, Diag: 0 (No Diagnostic)
%Jul 30 17:16:25:535 2024 Z-SH-C2-5FB-CS-3.1 BFD/5/BFD_CHANGE_FSM: Sess[172.20.8.242/172.20.8.241, LD/RD:4099/33792, Interface:XGE1/5/0/35, SessType:Ctrl, LinkType:INET], Ver:1, Sta: INIT->UP, Diag: 0 (No Diagnostic)
%Jul 30 17:16:26:015 2024 Z-SH-C2-5FB-CS-3.1 BGP/5/BGP_STATE_CHANGED: BGP.: 172.20.9.9 state has changed from OPENCONFIRM to ESTABLISHED.
%Jul 30 17:16:26:016 2024 Z-SH-C2-5FB-CS-3.1 BFD/5/BFD_CHANGE_FSM: Sess[172.20.9.10/172.20.9.9, LD/RD:4100/33791, Interface:XGE1/5/0/36, SessType:Ctrl, LinkType:INET], Ver:1, Sta: DOWN->INIT, Diag: 0 (No Diagnostic)
%Jul 30 17:16:26:026 2024 Z-SH-C2-5FB-CS-3.1 BFD/5/BFD_CHANGE_FSM: Sess[172.20.9.10/172.20.9.9, LD/RD:4100/33791, Interface:XGE1/5/0/36, SessType:Ctrl, LinkType:INET], Ver:1, Sta: INIT->UP, Diag: 0 (No Diagnostic)
%Jul 30 17:16:26:412 2024 Z-SH-C2-5FB-CS-3.1 BGP/5/BGP_STATE_CHANGED: BGP.: 172.20.8.245 state has changed from OPENCONFIRM to ESTABLISHED.

此前做过acl写入