华为AR2240每半小时出现这样的提示，导致断网掉包，是什么原因呢？

Question

Apr 20 2015 20:00:52+00:00 CZ-YZX-R %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP on the interface GigabitEthernet0/0/0 has entered the UP state.
Apr 20 2015 20:00:52+00:00 CZ-YZX-R %%01IFPDT/4/IF_STATE(l)[1]:Interface GigabitEthernet0/0/0 has turned into UP state.
Apr 20 2015 20:00:49+00:00 CZ-YZX-R %%01RM/4/IPV4_DEFT_RT_CHG(l)[2]:IPV4 default Route is changed. (ChangeType=Delete, InstanceId=0, Protocol=Static, ExitIf=Unknown, Nexthop=172.16.1.1, Neighbour=0.0.0.0, Preference=60, Label=NULL, Metric=0)
Apr 20 2015 20:00:49+00:00 CZ-YZX-R %%01IFNET/4/LINK_STATE(l)[3]:The line protocol IP on the interface GigabitEthernet0/0/0 has entered the DOWN state.
Apr 20 2015 20:00:49+00:00 CZ-YZX-R %%01IFPDT/4/IF_STATE(l)[4]:Interface GigabitEthernet0/0/0 has turned into DOWN state.
。。。。。不断重复

Answer 1

gi0/0/0端口down掉了。检查下链路。端口有做安全么？