开启vlan2 后交换机设置的地址ping vlan2 网关 延时130nm左右，cpu 利用率16% ，
交换机告警：
dis cpu-usage
[Unit 0]
CPU Usage Stat. Cycle: 5 (Second)
CPU Usage : 24% Max: 100%
CPU Usage Stat. Time : 2020-03-27 15:52:59
CPU Usage Stat. Tick : 0xf74(CPU Tick High) 0x570a594f(CPU Tick Low)
Actual Stat. Cycle : 0x0(CPU Tick High) 0x1dd368fa(CPU Tick Low)
TaskName CPU Runtime(CPU Tick High/CPU Tick Low)
BUFM 0% 0/ bbbde
VIDL 76% 0/15538d45
TICK 0% 0/ 390140
IPCQ 0% 0/ 17645
RPCQ 0% 0/ 17af4
VFS 0% 0/ 13cc
STND 0% 0/ 1f1bc
bcmDPC 2% 0/ b19f80
tCOU 0% 0/ 28ca93
bcmTX 0% 0/ 6beae
multiAsyncTX 0% 0/ dcebd
bcmRX 14% 0/ 4329ba5
vt0 0% 0/ 437964
INFO 0% 0/ 1a89
SRM 1% 0/ 825b37
L2IF 0% 0/ 42739
FIB6 0% 0/ d70f
ROUT 1% 0/ 515a1a
SNPG 0% 0/ 6ac9
LLDP 0% 0/ 39fb
DH1 0% 0/ 6634
SOCK 2% 0/ dc3e43
VTYD 0% 0/ 52103
LBDT 0% 0/ 6cd20
TRAP 0% 0/ 16ad38
TRUN 0% 0/ 16d538
NTPT 0% 0/ 20416d
AUTH 0% 0/ 182
EAP 0% 0/ 5f99
MACA 0% 0/ 2b4f
TAC 0% 0/ 68f93
MSTP 0% 0/ 4f18
WEBS 0% 0/ 1f378f
SRMT 1% 0/ 5eb16a
CLST 0% 0/ eeafa
NTDP 0% 0/ 2645dd
NDP 0% 0/ 67d1d
RMON 0% 0/ 4ff0
OS 3% 0/ 0
dis log
Logging buffer configuration and contents:enabled
Allowed max buffer size : 1024
Actual buffer size : 512
Channel number : 4 , Channel name : logbuffer
Dropped messages : 0
Overwritten messages : 0
Current messages : 181
Mar 27 2020 15:32:13 JiKe2318_nan %%01SEC/4/ATCKDF(l): AttackType:Land attack; Receive IfIndex: Vlanif200 ; from ; to ; begin time :2020/03/27 15:31:53; end time: 2020/03/27 15:31:53; total packets: 1;
Mar 27 2020 15:22:13 JiKe2318_nan %%01CFM/4/SAVE(l): When deciding whether to save configuration to the device, the user chose Y.
Aug 6 2008 17:12:19 JiKe2318_nan %%01SEC/4/ATCKDF(l): AttackType:Land attack; Receive IfIndex: Vlanif200 ; from ; to ; begin time :2008/08/06 17:12:02; end time: 2008/08/06 17:12:02; total packets: 1;