Cisco 4506 high CPU usage

Hello

Yesterday afternoon, one of our 4506 switch has climbed to 96% CPU usage. I did not the configuration changes. Here is the process with high CPU usage

40 36630921841089949084 3360% 8.63% 10.56% 11,29% 0 Cat4k Mgmt HiPri

41 30929587802851505705 1084 36,61 36,53% 36.18% 0 Cat4k Mgmt LoPri

76 72485492 270422107 268 entry IP 7.91% 7.72% 7,68% 0

113 35661224 40030007 890 21.91 28.13 29,84% 0 DHCPD receive

After having HS health platform, what are those high:

S2w-JobEventSchedule 10.00 7.54 10 8 100 500 9 9 7 36703:06

Stub-JobEventSchedul 10.00 12.23 10 48 100 500 12 12 9 51004:51

K2CpuMan review 30,00 29,44 30 99 100 500 33 32 25 37067:58

K2AccelPacketMan: Tx 10.00 12,15 20 1 100 500 12 12 10 11871:22

And finally sh platform cpu packet statistics gives me this

Packets dropped in hardware by CPU Subport (txQueueNotAvail)

UC Subport TxQueue 0 TxQueue 1 TxQueue 2 TxQueue 3

------------ --------------- --------------- --------------- ---------------

0 11045 14031 149981 188579662

1               0               0               0         5919279

2               0          115638               0               0

RkiosSysPacketMan:

Falures allowance package: 0

Package (common software) buffer allocation falures: 0

Package Buffer (software ESMP) allocation falures: 0

Package Buffer (software EOBC) allocation falures: 0

Falures IOS Packet Wrapper buffer allocation: 0

Packets dropped in the overall treatment

Total 5 s 1 min, 5 min 1 hour avg avg avg avg

-------------------- --------- --------- --------- ----------

146521131 0 0 0 0

Packets dropped in treatment by event CPU

AVG s Total 5 1 min, 5 min avg avg avg 1 hour event

----------------- -------------------- --------- --------- --------- ----------

Input Acl 146002289 0 0 0 0

SA Miss                             27         0         0         0          0

Packets dropped in the treatment of priority

AVG s Total 5 priority 1 min, 5 min avg avg avg 1 hour

----------------- -------------------- --------- --------- --------- ----------

Normal 46723179 0 0 0 0

Medium 518884 0 0 0 0

High 99797883 0 0 0 0

Packets dropped in the treatment of the reason

AVG s Total 5 reason 1 min, 5 min avg avg avg 1 hour

------------------ -------------------- --------- --------- --------- ----------

SrcAddrTableFilt 24 0 0 0 0

L2DstDrop                             7         0         0         0          0

L2DstDropInAcl 46 0 0 0 0

NoDstPorts                           32         0         0         0          0

NoFloodPorts 146521022 0 0 0 0

The package 16 total queues

Packets received from the packet queue

Total 5 s 1 min, 5 min 1 hour avg avg avg avg queue

---------------------- --------------- --------- --------- --------- ----------

6279742115 238 247 203 193 ESMP

L2/L3Control 1320811357 57 48 43 41

Host of learning 24933459 1 0 0 0

L3 Fwd Medium 5813 0 0 0 0

L3 Fwd Low 72923122 0 0 0 0

L2 Fwd high 11130 0 0 0 0

L2 Fwd Medium 164016 0 0 0 0

L2 Fwd 242645408 227 237 193 185 Low

L3 Rx High                           9         0         0         0          0

L3 Rx 89296999 439 461 378 364 Low

Failure of the RPF 129420 0 0 0 0

Packets dropped packet queue

Total 5 s 1 min, 5 min 1 hour avg avg avg avg queue

---------------------- --------------- --------- --------- --------- ----------

L2/L3Control 18470371 0 0 0 0

Host of learning 5825831 0 0 0 0

L2 Fwd Low 405210 0 0 0 0

L3 Rx Low                         9863         0         0         0          0

I will be restarting the night switch to see if it helps.

Thank you.

Salman

Hello Salman,

If DHCP requests are taken over by clients, you will probably want to focus on the limiting of requests DHCP using DHCP snooping.

ip dhcp snooping limit rate rate

http://www.Cisco.com/c/en/us/support/docs/switches/catalyst-4000-series-switches/65591-Cat4500-high-CPU.html#high_cpu

http://www.Cisco.com/c/en/us/TD/docs/switches/LAN/catalyst4500/12-2/25ew/configuration/guide/conf/DHCP.html#wp1073418

-Ginette

Tags: Cisco Network

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    resident who can cause as many questions as the malware and may be more difficult to detect as the
    cause.

    No one program cannot be used to detect and remove any malware. Added that often easy
    to detect malicious software often comes with a much harder to detect and remove the payload. Then
    its best to be thorough than paying the high price later now too. Check with them to one
    extreme overkill point and then run the cleaning only when you are sure that the system is
    clean.

    It can be made repeatedly in Mode safe - F8 tap that you start, however, you must also run
    the regular windows when you can.

    Download malwarebytes and scan with it, run MRT and add Prevx to be sure that he is gone.
    (If Rootkits run UnHackMe)

    Download - SAVE - go to where you put it-right on - click RUN AS ADMIN

    Malwarebytes - free
    http://www.Malwarebytes.org/

    Run the malware removal tool from Microsoft

    Start - type in the search box-> find MRT top - right on - click RUN AS ADMIN.

    You should get this tool and its updates via Windows updates - if necessary, you can
    Download it here.

    Download - SAVE - go to where you put it-right on - click RUN AS ADMIN
    (Then run MRT as shown above.)

    Microsoft Malicious - 32-bit removal tool
    http://www.Microsoft.com/downloads/details.aspx?FamilyId=AD724AE0-E72D-4F54-9AB3-75B8EB148356&displaylang=en

    Microsoft Malicious removal tool - 64 bit
    http://www.Microsoft.com/downloads/details.aspx?FamilyId=585D2BDE-367F-495e-94E7-6349F4EFFC74&displaylang=en

    also install Prevx to be sure that it is all gone.

    Download - SAVE - go to where you put it-right on - click RUN AS ADMIN

    Prevx - Home - free - small, fast, exceptional CLOUD protection, working with others
    security programs. It is a single scanner, VERY EFFICIENT, if it finds something to come back
    here or use Google to see how to remove.
    http://www.prevx.com/   <-->
    http://info.prevx.com/downloadcsi.asp  <-->

    Choice of PCmag editor - Prevx-
    http://www.PCMag.com/Article2/0, 2817,2346862,00.asp

    Try the demo version of Hitman Pro:

    Hitman Pro is a second scanner reviews, designed to save your computer from malicious software
    (viruses, Trojans, rootkits, etc.). who infected your computer despite safe
    what you have done (such as antivirus, firewall, etc.).
    http://www.SurfRight.nl/en/hitmanpro

    --------------------------------------------------------

    If necessary here are some free online scanners to help the

    http://www.eset.com/onlinescan/

    http://OneCare.live.com/site/en-us/default.htm

    http://www.Kaspersky.com/virusscanner

    Other tests free online
    http://www.Google.com/search?hl=en&source=HP&q=antivirus+free+online+scan&AQ=f&OQ=&AQI=G1

    --------------------------------------------------------

    Also follow these steps for the General corruption of cleaning and repair/replace damaged/missing
    system files.

    Run DiskCleanup - start - all programs - Accessories - System Tools - Disk Cleanup

    Start - type this into the search-> find COMMAND to top box and RIGHT CLICK-
    RUN AS ADMIN

    Enter this at the command prompt - sfc/scannow

    How to analyze the log file entries that the Microsoft Windows Resource Checker
    (SFC.exe) program generates in Windows Vista cbs.log
    http://support.Microsoft.com/kb/928228

    Run checkdisk - schedule it to run at the next startup, then apply OK then restart your way.

    How to run the check disk at startup in Vista
    http://www.Vistax64.com/tutorials/67612-check-disk-Chkdsk.html

    -----------------------------------------------------------------------

    If we find Rootkits use this thread and other suggestions. (Run UnHackMe)

    http://social.answers.Microsoft.com/forums/en-us/InternetExplorer/thread/a8f665f0-C793-441A-a5b9-54b7e1e7a5a4/

    I hope this helps.

    Rob - bicycle - Mark Twain said it is good.

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