交换机5500-接口反复up/down，如何解决？

DEVICE_NAME          : S5500V2-28C-EI

DEVICE_SERIAL_NUMBER : 210235A3U39215Q000DC

MAC_ADDRESS          : 60DB-15A0-0FFC

MANUFACTURING_DATE   : 2021-06-02

VENDOR_NAME          : H3C

故障现象：接口反复up/down；

日志：

%Apr 26 12:27:11:199 2013 amczscw IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/3 changed to down.

%Apr 26 12:27:11:199 2013 amczscw IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/3 changed to down.

%Apr 26 12:27:13:544 2013 amczscw IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/3 changed to up.

%Apr 26 12:27:13:544 2013 amczscw IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/3 changed to up.

%Apr 26 12:27:13:876 2013 amczscw LLDP/6/LLDP_CREATE_NEIGHBOR: Nearest bridge agent neighbor created on port GigabitEthernet1/0/3 (IfIndex 3), neighbor's chassis ID is 70c6-ddeb-b1f0, port ID is GigabitEthernet1/0/24.

%Apr 26 12:27:28:240 2013 amczscw IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/3 changed to down.

%Apr 26 12:27:28:244 2013 amczscw IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/3 changed to down.

%Apr 26 12:27:30:688 2013 amczscw IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/3 changed to up.

%Apr 26 12:27:30:700 2013 amczscw IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/3 changed to up.

%Apr 26 12:27:30:867 2013 amczscw LLDP/6/LLDP_CREATE_NEIGHBOR: Nearest bridge agent neighbor created on port GigabitEthernet1/0/3 (IfIndex 3), neighbor's chassis ID is 70c6-ddeb-b1f0, port ID is GigabitEthernet1/0/24.

g1/0/3口对接一台交换机（trunk互联），g1/0/24为接线。