案例分析一次C4506交换机CPU利用率过高的处理过程.docx
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案例分析一次C4506交换机CPU利用率过高的处理过程
案例分析一次C4506交换机CPU利用率过高的处理过程
案例分析：
一次C4506交换机CPU利用率过高的处理过程刚处理过一次C4506交换机CPU利用率过高
（1）
通过交换机showproccpu的命令输出的信息可以看到：
在5秒、1分钟、5分钟内Cat4kMgmtLoPri进程的CPU占用率分别为91.69%92.18%92.23%
显然是这个进程消耗了大量的CPU运行资源，从而导致交换机没有新的资源处理新的请求。
处理器运行两个进程，Cat4kMgmtHiPri和Cat4kMgmtLoPri，这两个进程同其他进程一样要占用cpu时间。
当Cat4k平台上某项进程占用cpu超出了应分配的cpu时间，Cat4kMgmtLoPri会接管这项进程，使其他进程能够得到cpu时间。
同样当某个进程占用cpu时间没有超过规定的cpu利用率，Cat4kMgmtHiPri会接管这个进程。
而Cat4kMgmtLoPri进程CPU占用率超过90%，我们判断一定是某一个进程大大超过了CPU应分配的时间，而Cat4kMgmtLoPri进程试图接管这一进程，而导致了Cat4kMgmtLoPri进程的CPU占用时间超过了90%。
根据这一思路只要我们找出这个进程，将其关闭或找出这个进程的作用，就可以解决这个问题并能够找出CPU占用率过高的原因。
showproccpu
CPUutilizationforfiveseconds:
99%/0%;oneminute:
99%;fiveminutes:
99%
PIDRuntime（ms）InvokeduSecs5Sec1Min5MinTTYProcess101300.00%0.00%0.00%0ChunkManager
2552*****250.00%0.00%0.00%0LoadMeter
316013112210.00%0.00%0.00%0SpanTreeHelper
40100.00%0.00%0.00%0DeferredEvents
5**********70540.00%0.06%0.05%0Checkheaps
64220000.00%0.00%0.00%0PoolManager
70200.00%0.00%0.00%0Timers80200.00%0.00%0.00%0SerialBackgroun
90100.00%0.00%0.00%0AAA_SERVER_DEADT
100200.00%0.00%0.00%0AAAhigh-capacit
110100.00%0.00%0.00%0Policy
Manager
1216182580.00%0.00%0.00%0IPCDynamicCach
130100.00%0.00%0.00%0IPCZoneManager
14644*****50.00%0.00%0.00%0IPCPeriodicTim
15412*****30.00%0.00%0.00%0IPCDeferredPor
160100.00%0.00%0.00%0IPCSeatManager
170100.00%0.00%0.00%0IFSAgentManage
18**********3160.23%0.21%0.22%0ARPInput
19681161810.00%0.00%0.00%0EntityMIBAPI
200100.00%0.00%0.00%0SERIALA'detect
21856*****70.00%0.00%0.00%0DynamicARPInsp
222060*****750.00%0.00%0.00%0HCCounterTimer
230100.00%0.00%0.00%0CriticalBkgnd
241716*****180.00%0.00%0.00%0NetBackground
250500.00%0.00%0.00%0Logger26716*****60.00%0.00%0.00%0TTYBackground
272072*****180.00%0.00%0.00%0Per-SecondJobs
28*****1947*****0.00%0.04%0.00%0Per-minuteJobs
29***-********-*****3244.63%3.81%3.72%0Cat4kMgmtHiPri
30***-********-*****125091.69%92.18%92.23%0Cat4kMgmtLoPri
31260*****50.00%0.00%0.00%0GaliosReschedul
320200.00%0.00%0.00%0Helper
330200.00%0.00%0.00%0NAMManager
IOSACL341522*****0.00%0.00%0.00%0rftask35**********300.00%0.00%0.00%0NetInput
36**********5040.07%0.03%0.00%0Computeloadavg
3708400.00%0.00%0.00%0BACKCHECK
380100.00%0.00%0.00%0chkptmessageha
390200.00%0.00%0.00%0cpf_process_msg_
400100.00%0.00%0.00%0cpf_process_ipcQ
4101400.00%0.00%0.00%0AggMgrProcess
420100.00%0.00%0.00%0*****
4301500.00%0.00%0.00%0Collectionproce
440300.00%0.00%0.00%0CEFswitchingba
450200.00%0.00%0.00%0AAADictionaryR
460200.00%0.00%0.00%0AAAServer
470100.00%0.00%0.00%0AAAACCTProc
480100.00%0.00%0.00%0ACCTPeriodicPr
49********-*****4920.71%0.62%0.62%0SpanningTree
504396*****780.00%0.01%0.00%0DTPProtocol
5140*****30.00%0.00%0.00%0Ethchnl
523744*****340.00%0.01%0.00%0UDLD5312934120.00%0.00%0.00%0DHCPSnooping
54201825100.00%0.00%0.00%0Port-Security
55***-********-*****5111.59%1.75%1.77%0IPInput
560100.00%0.00%0.00%0ICMPeventhandl
57**********24240.07%0.14%0.11%0CDPProtocol
5816221720.00%0.02%0.00%0Exec611482534580.00%0.00%0.00%0CEFbackgroundp
620200.00%0.00%0.00%0XDRmcast
630100.00%0.00%0.00%0IPCLCMessageH
640100.00%0.00%0.00%0XDRRPPingBack
65892580.00%0.00%0.00%0XDRRPbackgroun
660100.00%0.00%0.00%0XDRRPTestBack
670100.00%0.00%0.00%068**********5500.07%0.07%0.07%0CEF:
IPv4proces
691843651110.00%0.00%0.00%0ADJbackground
70483671300.00%0.00%0.00%0L2MM711201447820.00%0.00%0.00%0MRD721068*****890.00%0.00%0.00%0IGMPSN730100.00%0.00%0.00%0IGMPSN-HA
740100.00%0.00%0.00%0SocketTimers
750200.00%0.00%0.00%0L2TRACESERVER
76288*****170.00%0.00%0.00%0TCPTimer
7740517840.00%0.00%0.00%0TCPProtocols
78101256411790.00%0.00%0.00%0HTTPCORE
790100.00%0.00%0.00%0CHKPT*****
800100.00%0.00%0.00%0CHKPTDevTest
810200.00%0.00%0.00%0ATIP_UDP_TSK
820100.00%0.00%0.00%0DHCPSnoopingHA
830100.00%0.00%0.00%0Probe
IPIRDPInput
840100.00%0.00%0.00%0RARPInput
855380*****1590.00%0.00%0.00%0DHCPDReceive
86113220795440.00%0.00%0.00%0IPBackground
8730018561610.00%0.00%0.00%0IPRIBUpdate
880100.00%0.00%0.00%0COPS89161371110.00%0.00%0.00%0ClusterL2
9076*****60.00%0.00%0.00%0ClusterRARP
910200.00%0.00%0.00%0LOCALAAA
920200.00%0.00%0.00%0AAACachedServe
930200.00%0.00%0.00%0TPLUS940300.00%0.00%0.00%0RADIUSTESTCMD
950200.00%0.00%0.00%0AAASENDSTOPEV
96**********140.15%0.04%0.01%0PMCallback
9738030391250.00%0.00%0.00%0VLANManager
98891380.00%0.00%0.00%0DHCPDTimer
994162500.00%0.00%0.00%0VTPTrapProcess
1000200.00%0.00%0.00%0DHCPSecurityHe
1010100.00%0.00%0.00%0DiagCard1/-1
1020100.00%0.00%0.00%0DiagCard2/-1
1030100.00%0.00%0.00%0DiagCard3/-1
1040100.00%0.00%0.00%0DiagCard4/-1
1054124768650.00%0.00%0.00%0SyslogTraps
1060200.00%0.00%0.00%0VTPMIB
EDITBUFF
1070300.00%0.00%0.00%0SPANswitch
1080200.00%0.00%0.00%0SNMPTimers
1090200.00%0.00%0.00%0IPSNMP1100100.00%0.00%0.00%0PDU*****HER
1110100.00%0.00%0.00%0SNMPENGINE
1120100.00%0.00%0.00%0SNMPConfCopyPro
113804916320.00%0.00%0.00%0SNMPTraps
1141344*****120.00%0.00%0.00%0NTP115324*****100.00%0.00%0.00%0DHCPDDatabase
116356*****60.00%0.00%0.00%0Systempolling
通过showplatformhealth命令进一步更为详细的检查Catalyst4506交换机的进程我们发现K2CpuManReview进程有异常，如下：
showplahea
%CPU%CPURunTimeMaxPriorityAverage%CPUTotal
TargetActualTargetActualFgBg5SecMinHourCPU
Lj-poll1.000.0121441005000000:
26
GalChassisVp-review3.000.1710281005000002:
50
S2w-JobEventSchedule10.000.251091005000004:
35
Stub-JobEventSchedul10.002.36103410050022135:
16
StatValueManUpdate1.000.05101005000001:
58
Pim-review0.100.00101005000000:
08
Ebm-host-review1.000.31841005000000:
27
Ebm-port-review0.100.00101005000000:
00
Protocol-aging-revie0.200.00201005000000:
00
Acl-Flattener1.000.001051005000000:
00
KxAclPathMancreate/1.000.001051005000000:
14
KxAclPathManupdate2.000.0010141005000000:
00
KxAclPathManreprogr1.000.00211005000000:
00
TagMan-RecreateMtegR1.000.001051005000000:
00
K2CpuManReview30.0069.843026100500112106781248:
14
K2AccelPacketMan:
Tx10.002.74200100500121210254:
45
K2AccelPacketMan:
Au0.100.00001005000000:
00
K2AclMan-taggedFlatA1.000.001051005000000:
00
K2AclCamManstaleen1.000.001051005000000:
00
K2AclCamManhwstats3.000.501051005000007:
24
K2AclCamMankxstats1.000.011051005000003:
03
K2AclCamManAuditre1.007.761051005005004:
07
K2AclPolicerTableMan1.000.001011005000000:
17
K2L2AddressTableR2.003.251251005000007:
25
K2L2NewStaticAddr2.000.001051005000000:
00
K2L2NewMulticastA2.000.001051005000000:
00
K2L2DynamicAddress2.000.001051005000000:
00
K2L2VlanTableRevi2.000.001281005000000:
02
K2L2DestinationCa2.000.001001005000000:
00
K2PortManReview2.001.53151110050021126:
42
Gigaport*****Review0.400.04411005000001:
15
Gigaport*****Review0.400.07411005000001:
15
Gigaport*****Review0.400.06411005000001:
15
Gigaport*****Review0.400.05411005000001:
17
Gigaport*****Review0.400.05411005000001:
17
Gigaport*****Review0.400.06411005000001:
16
Gigaport*****Review0.400.05411005000001:
17
Gigaport*****Review0.400.05411005000001:
17
Gigaport*****Review0.400.12401005000005:
23
Gigaport*****Review0.400.09401005000005:
20
Gigaport*****Review0.400.08401005000005:
17
Gigaport*****Review0.400.09401005000005:
19
Gigaport*****Review0.400.04411005000001:
18
Gigaport*****Review0.400.08411005000001:
17
Gigaport*****Review0.400.06411005000001:
16
Gigaport*****Review0.400.06411005000001:
16
Gigaport*****Review0.400.05411005000001:
24
Gigaport*****Review0.400.05411005000001:
22
Gigaport*****Review0.400.07451005000001:
22
Gigaport*****Review0.400.07411005000001:
22
Gigaport*****Review0.400.074111005000001:
22
Gigaport*****Review0.400.06411005000001:
23
Gigaport*****Review0.400.05491005000001:
22
Gigaport*****Review0.400.05411005000001:
21
Gigaport*****Review0.400.08401005000005:
19
Gigaport*****Review0.400.11401005000005:
22
Gigaport*****Review0.400.08401005000005:
19
Gigaport*****Review0.400.10401005000005:
19
Gigaport*****Review0.400.08401005000005:
18
Gigaport*****Review0.400.09401005000005:
18
Gigaport*****Review0.400.11401005000005:
20
Gigaport*****Review0.400.09401005000005:
19
K2Fibcamusagerevi2.000.001501005000000:
00
K2FibIrmFibReview2.
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