SecPath U200-M 端口不时掉线？

SecPath U200-M

interface GigabitEthernet0/1  固定外网IP

interface GigabitEthernet0/2 连接公司内网（S5120）

现在问题interface GigabitEthernet0/2不定时掉线，四五分钟后又正常，

有时有日志记录，有时没有

日志：

2017-09-08  10:36  发现掉线

2017-09-08  10:41  正常日志记录：

Sep 8 10:38:56:469 2017     WEB Warning admin logged in from 192.168.1.5 

Sep 8 10:38:42:514 2017     WEB Warning admin failed to log in from 192.168.1.5 

Sep 8 10:38:28:546 2017     WEB Warning admin failed to log in from 192.168.1.5 

Sep 8 10:38:03:654 2017     WEB Warning admin logged out from 192.168.1.5 

Sep 8 10:37:57:609 2017     SHELL Warning SSH user admin failed to login from 192.168.2.105 on VTY0. 

Sep 8 10:36:32:257 2017     IFNET Warning Line protocol on the interface GigabitEthernet0/2 is UP  

Sep 8 10:36:32:257 2017     IFNET Warning GigabitEthernet0/2: link status is UP  

Sep 8 10:36:29:757 2017     IFNET Warning Line protocol on the interface GigabitEthernet0/2 is DOWN  

Sep 8 10:36:29:757 2017     IFNET Warning GigabitEthernet0/2: link status is DOWN  

Sep 8 10:36:23:757 2017     IFNET Warning Line protocol on the interface GigabitEthernet0/2 is UP  

Sep 8 10:36:23:757 2017     IFNET Warning GigabitEthernet0/2: link status is UP  

Sep 8 10:36:20:757 2017     IFNET Warning Line protocol on the interface GigabitEthernet0/2 is DOWN  

Sep 8 10:36:20:757 2017     IFNET Warning GigabitEthernet0/2: link status is DOWN  

Sep 8 10:32:50:758 2017     IFNET Warning Line protocol on the interface GigabitEthernet0/2 is UP  

Sep 8 10:32:50:758 2017     IFNET Warning GigabitEthernet0/2: link status is UP  

Sep 8 10:32:47:758 2017     IFNET Warning Line protocol on the interface GigabitEthernet0/2 is DOWN  

Sep 8 10:32:47:757 2017     IFNET Warning GigabitEthernet0/2: link status is DOWN  

发生问题时，设备面板端口指示灯正常闪动

处理：网线，两设备端口都换，问题还时有发生，这个情况是什么问题？