各位大虾，昨天我的NS 5GT 一直出现下列纪录，持续了5-6个小时，大家都上不了外部网。请教什么原因造成？如何避免？谢谢

2006-08-14 17:13:47 notif The physical state of the interface untrust has changed to Up
2006-08-14 17:13:43 notif The physical state of the interface untrust has changed to Down
2006-08-14 17:13:42 notif The physical state of the interface untrust has changed to Up
2006-08-14 17:13:38 notif The physical state of the interface untrust has changed to Down
2006-08-14 17:13:37 notif The physical state of the interface untrust has changed to Up
2006-08-14 17:13:33 notif The physical state of the interface untrust has changed to Down
2006-08-14 17:13:32 notif The physical state of the interface untrust has changed to Up
2006-08-14 17:13:28 notif The physical state of the interface untrust has changed to Down
2006-08-14 17:13:27 notif The physical state of the interface untrust has changed to Up
2006-08-14 17:13:26 notif The physical state of the interface untrust has changed to Down

你的外端口总是有up down的不停切换，可以查看一下外端口接入的设备是否有问题，还有就是查看一下系统有没有被攻击的记录，如果是接口硬件问题，更换一下接口即可

我的5GT也是这样，Untrust不停的UP~Down，灯一闪一灭。
有以下两种办法可以使5GT继续工作：
1、弃用有问题的Untrust，在GUI界面更换Port mode为双Unturst，使用第四个接口为Untrust（eth2），重新配置后可继续使用，也可更改为其它模式。

2、在命令行设置Untrust端口为10M 半双工。
set int untrust phy half 10mb

可以试试，我的后来就用这两个办法搞定的。