两交换机做堆叠后 提示如下错误 有拓扑图

两台交换机做堆叠 双端口冗余 做好后 端口一会DOWN 一会UP 

提示如下

[SWA]%Sep 27 15:35:49:020 2018 SWA IFNET/3/PHY_UPDOWN: Physical state on the interface Ten-GigabitEthernet1/0/51 changed to down. %Sep 27 15:35:49:020 2018 SWA IFNET/5/LINK_UPDOWN: Line protocol state on the interface Ten-GigabitEthernet1/0/51 changed to down. %Sep 27 15:35:50:633 2018 SWA IFNET/3/PHY_UPDOWN: Physical state on the interface Ten-GigabitEthernet1/0/51 changed to up. %Sep 27 15:35:50:635 2018 SWA IFNET/5/LINK_UPDOWN: Line protocol state on the interface Ten-GigabitEthernet1/0/51 changed to up. %Sep 27 15:35:54:992 2018 SWA LLDP/6/LLDP_CREATE_NEIGHBOR: Nearest bridge agent neighbor created on port Ten-GigabitEthernet1/0/51 (IfIndex 52), neighbor's chassis ID is 94b0-cb49-0300, port ID is Ten-GigabitEthernet2/0/51. %Sep 27 15:36:23:022 2018 SWA IFNET/3/PHY_UPDOWN: Physical state on the interface Ten-GigabitEthernet1/0/51 changed to down. %Sep 27 15:36:23:022 2018 SWA IFNET/5/LINK_UPDOWN: Line protocol state on the interface Ten-GigabitEthernet1/0/51 changed to down. %Sep 27 15:36:23:254 2018 SWA IFNET/3/PHY_UPDOWN: Physical state on the interface Ten-GigabitEthernet1/0/51 changed to up. %Sep 27 15:36:23:255 2018 SWA IFNET/5/LINK_UPDOWN: Line protocol state on the interface Ten-GigabitEthernet1/0/51 changed to up. %Sep 27 15:36:27:206 2018 SWA LLDP/6/LLDP_CREATE_NEIGHBOR: Nearest bridge agent neighbor created on port Ten-GigabitEthernet1/0/51 (IfIndex 52), neighbor's chassis ID is 94b0-cb49-0300, port ID is Ten-GigabitEthernet2/0/51.