CPU Usage Stat. Cycle: 60 (Second)

CPU Usage            : 99% Max: 99%

CPU Usage Stat. Time : 2016-12-10  19:37:01 

Dec 10 2016 19:34:38 BEJ-ANF-AGG-9312-17.64 %%01SECE/4/PORT_ATTACK(l)[0]:Port attack occurred.(Slot=MPU, SourceAttackInterface=XGigabitEthernet3/0/1, OuterVlan/InnerVlan=1904/0, AttackProtocol=TCP, AttackPackets=416 packets per second)

Dec 10 2016 19:34:38 BEJ-ANF-AGG-9312-17.64 %%01SECE/4/USER_ATTACK(l)[1]:User attack occurred.(Slot=MPU, SourceAttackInterface=XGigabitEthernet3/0/1, OuterVlan/InnerVlan=1904/0, UserMacAddress=0010-f348-7037, AttackProtocol=TCP, AttackPackets=416 packets per second)

Dec 10 2016 19:34:05 BEJ-ANF-AGG-9312-17.64 %%01SECE/4/SPECIFY_SIP_ATTACK(l)[2]:The specified source IP address attack occurred.(Slot=MPU, SourceAttackIP = 163.177.72.158, AttackProtocol=TCP, AttackPackets=144 packets per second)

Dec 10 2016 19:33:49 BEJ-ANF-AGG-9312-17.64 %%01SECE/4/PORT_ATTACK(l)[3]:Port attack occurred.(Slot=MPU, SourceAttackInterface=XGigabitEthernet3/0/1, OuterVlan/InnerVlan=1904/0, AttackProtocol=ICMP, AttackPackets=224 packets per second)

Dec 10 2016 19:33:49 BEJ-ANF-AGG-9312-17.64 %%01SECE/4/USER_ATTACK(l)[4]:User attack occurred.(Slot=MPU, SourceAttackInterface=XGigabitEthernet3/0/1, OuterVlan/InnerVlan=1904/0, UserMacAddress=0010-f348-7037, AttackProtocol=ICMP, AttackPackets=224 packets per second)

Dec 10 2016 19:29:38 BEJ-ANF-AGG-9312-17.64 %%01SECE/4/PORT_ATTACK(l)[5]:Port attack occurred.(Slot=MPU, SourceAttackInterface=XGigabitEthernet3/0/1, OuterVlan/InnerVlan=1904/0, AttackProtocol=TCP, AttackPackets=320 packets per second)

Dec 10 2016 19:29:38 BEJ-ANF-AGG-9312-17.64 %%01SECE/4/USER_ATTACK(l)[6]:User attack occurred.(Slot=MPU, SourceAttackInterface=XGigabitEthernet3/0/1, OuterVlan/InnerVlan=1904/0, UserMacAddress=0010-f348-7037, AttackProtocol=TCP, AttackPackets=320 packets per second)

Dec 10 2016 19:28:47 BEJ-ANF-AGG-9312-17.64 %%01SECE/4/PORT_ATTACK(l)[7]:Port attack occurred.(Slot=MPU, SourceAttackInterface=XGigabitEthernet3/0/1, OuterVlan/InnerVlan=1904/0, AttackProtocol=ICMP, AttackPackets=144 packets per second)

Dec 10 2016 19:28:47 BEJ-ANF-AGG-9312-17.64 %%01SECE/4/USER_ATTACK(l)[8]:User attack occurred.(Slot=MPU, SourceAttackInterface=XGigabitEthernet3/0/1, OuterVlan/InnerVlan=1904/0, UserMacAddress=0010-f348-7037, AttackProtocol=ICMP, AttackPackets=144 packets per second)

从log信息中可以看出大量的攻击数据包（tcp icmp）是从 XG 3/0/1 的vlan 1904进入，这个vlan是我到联通的互联，我的默认路由是通过vlan 1904到联通。

原因是我设备配置一个loopback接口，上面配置了一个联通给的IP ，攻击的目标始即为这个IP地址，将地址取消后 cpu降到正常范围。

CPU Usage Stat. Cycle: 60 (Second)

CPU Usage            : 39% Max: 99%

CPU Usage Stat. Time : 2016-12-10  19:39:06 

本文出自 “lihongweibj” 博客，请务必保留此出处http://lihongweibj.blog.51cto.com/6235038/1881541

由于网络攻击导致路由器CPU 99% 网络时断时通