求助-ENSP实验的时候交换机端口频繁出现up/down现象该怎么办？

请问各位前辈ENSP实验的时候交换机端口频繁出现up/down现象该怎么办困扰我有一段时间了。
/*
Feb 20 2019 11:45:22-08:00 s6 %PHY/1/PHY(l)[54]: Ethernet0/0/1: change sta
tus to down
Feb 20 2019 11:45:23-08:00 s6 %PHY/1/PHY(l)[55]: Ethernet0/0/1: change sta
tus to up
Feb 20 2019 11:46:18-08:00 s6 %PHY/1/PHY(l)[56]: Ethernet0/0/1: change sta
tus to down
Feb 20 2019 11:46:19-08:00 s6 %PHY/1/PHY(l)[57]: Ethernet0/0/1: change sta
tus to up
Feb 20 2019 11:48:12-08:00 s6 %PHY/1/PHY(l)[58]: Ethernet0/0/3: change sta
tus to up
Feb 20 2019 11:48:33-08:00 s6 %PHY/1/PHY(l)[59]: Ethernet0/0/3: change sta
tus to down
Feb 20 2019 11:48:34-08:00 s6 %PHY/1/PHY(l)[60]: Ethernet0/0/3: change sta
tus to up
Feb 20 2019 11:49:12-08:00 s6 %PHY/1/PHY(l)[61]: Ethernet0/0/2: change sta
tus to down
Feb 20 2019 11:49:13-08:00 s6 %PHY/1/PHY(l)[62]: Ethernet0/0/2: change sta
tus to up
Feb 20 2019 11:49:35-08:00 s6 %PHY/1/PHY(l)[63]: Ethernet0/0/2: change sta
tus to down
Feb 20 2019 11:49:36-08:00 s6 %PHY/1/PHY(l)[64]: Ethernet0/0/2: change sta
tus to up
Feb 20 2019 11:49:38-08:00 s6 %PHY/1/PHY(l)[65]: Ethernet0/0/1: change sta
tus to down
Feb 20 2019 11:49:39-08:00 s6 %PHY/1/PHY(l)[66]: Ethernet0/0/1: change sta
tus to up
*/