汇聚交换机（华三）上查到的日志

网络中偶尔有机子无法上网，楼层交换机中发现大量down/up告警，时间并不固定，以某一端口为主，偶有其他端口。查了汇聚交换机同期日志有以下类型日志，请大佬帮忙看一下。

%Sep 28 14:06:13:104 2022 H3C-S5130-28TP_HuiJu1 IFNET/3/PHY_UPDOWN: GigabitEthernet1/0/20 link status is up. %Sep 28 14:06:13:120 2022 H3C-S5130-28TP_HuiJu1 IFNET/5/LINK_UPDOWN: Line protocol on the interface GigabitEthernet1/0/20 is up. %Sep 28 14:06:13:807 2022 H3C-S5130-28TP_HuiJu1 LLDP/6/LLDP_CREATE_NEIGHBOR: Nearest bridge agent new neighbor created on Port GigabitEthernet1/0/20 (IfIndex 20), Chassis ID is 70f9-6d12-b846, Port ID is GigabitEthernet1/0/13. %Sep 28 14:06:43:424 2022 H3C-S5130-28TP_HuiJu1 STP/6/STP_DETECTED_TC: Instance 0's port GigabitEthernet1/0/20 detected a topology change. %Sep 28 14:43:44:426 2022 H3C-S5130-28TP_HuiJu1 STP/6/STP_DETECTED_TC: Instance 0's port GigabitEthernet1/0/20 detected a topology change. %Sep 28 15:38:45:809 2022 H3C-S5130-28TP_HuiJu1 IFNET/3/PHY_UPDOWN: GigabitEthernet1/0/20 link status is down. %Sep 28 15:38:45:814 2022 H3C-S5130-28TP_HuiJu1 IFNET/5/LINK_UPDOWN: Line protocol on the interface GigabitEthernet1/0/20 is down. %Sep 28 15:40:27:000 2022 H3C-S5130-28TP_HuiJu1 LLDP/5/LLDP_NEIGHBOR_AGE_OUT: Nearest bridge agent neighbor aged out on Port GigabitEthernet1/0/20 (IfIndex 20), Chassis ID is 70f9-6d12-b846, Port ID is GigabitEthernet1/0/13.