High CPU utilization on Cisco 1760

Discussion in 'Cisco' started by Bancal, Sep 19, 2005.

  1. Bancal

    Bancal Guest

    Hello, sometimes our Cisco 1760 has high CPU utilization and it lasts
    for 5-20 seconds

    Here's how it looks

    rtr-off-02>sh proc cpu hi

    rtr-off-02 09:56:12 AM Monday Sep 19 2005 msk


    55555 3333333333 77777
    111 11111111112222244444111113333311111222227777700000
    100 **
    90 **
    80 **
    70 *******
    60 *******
    50 ***** *******
    40 ***** *******
    30 ***** ********** *******
    20 ***** ********** *******
    10 ***** **********************
    0....5....1....1....2....2....3....3....4....4....5....5....
    0 5 0 5 0 5 0 5 0 5
    CPU% per second (last 60 seconds)

    959773747 956395999887669999999896939997999999788 99999989
    7975543884919979999267449959896496992993909999077499999999
    100 * * * * *** ******* * * ** * **** ****** ***
    90 * * * * *** * ******* * * *** ****** ** **********
    80 * *** * * * ****** ********* * *** ****** ** **********
    70 * *** * * * * * *#**** *********** ************* **********
    60 ***** * * * * ***#**************#** ************* *#**##****
    50 ***** *** *** ***#*******#*#****#** *##****#*#*** *#**##****
    40 ***** #** *******#*******###**#*#****##***##*#*** ######*#**
    30 #*#***#** *******#*##***#######*##***##*######**# ######*##*
    20 ###***##* #***#*#####*#############*###########*# ######*##*
    10 ######### ####################################### ##########
    0....5....1....1....2....2....3....3....4....4....5....5....
    0 5 0 5 0 5 0 5 0 5
    CPU% per minute (last 60 minutes)
    * = maximum CPU% # = average CPU%
    1 1 1 1

    9999 9999999199999999 0999974
    999999909999999999998534189999090999

    9998656559999999099999989909979618999999909999999999953532629999090999
    100 **** ******* ******** ***** ********************
    ************
    90 **** ******* ******** ***** ********************
    ************
    80 **** ******* ******** ****** *********************
    *************
    70 **** ******* ******** ****** *********************
    *************
    60 **** ******* ******** ****** **********************
    *************
    50 **** ******* ******** ****** **********************
    *************
    40 **** ******* ******** ******* ********************** *
    *************
    30 **** ******* ******** ******* ************************
    *****#**#*###
    20 #*** ******* ******** *******
    *******#***#*****************#########
    10
    #*********#*#*#**##***##**#***#***#*****########************############

    0....5....1....1....2....2....3....3....4....4....5....5....6....6....7.
    0 5 0 5 0 5 0 5 0 5 0 5
    0
    CPU% per hour (last 72 hours)
    * = maximum CPU% # = average CPU%



    rtr-off-02>sh proc cpu so
    CPU utilization for five seconds: 95%/30%; one minute: 31%; five
    minutes: 21%
    PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
    34 101467021 50369011 2014 64.14% 20.42% 12.98% 0 IP Input

    63 470816 7203932 65 0.39% 0.08% 0.01% 0 Inspect
    Timer
    21 360820 1784502 202 0.31% 0.05% 0.01% 0 Logger

    101 1253374 1155392 1084 0.15% 0.03% 0.04% 0 SNMP
    ENGINE
    93 492036 558149200 0 0.15% 0.05% 0.01% 0 SAA
    Event Proces
    59 3625 38096 95 0.07% 0.00% 0.00% 0 Adj
    Manager
    4 629 129 4875 0.07% 0.05% 0.07% 6 Virtual
    Exec
    83 565231 6072498 93 0.07% 0.04% 0.04% 0 Crypto
    ACL
    8 0 2 0 0.00% 0.00% 0.00% 0 Timers

    7 0 1 0 0.00% 0.00% 0.00% 0
    AAA_SERVER_DEADT



    What's wrong with my Cisco?



    Here's some more info about Cisco router
    rtr-off-02>sh ver
    Cisco Internetwork Operating System Software
    IOS (tm) C1700 Software (C1700-K9O3SY7-M), Version 12.3(9), RELEASE
    SOFTWARE (fc2)
    Copyright (c) 1986-2004 by cisco Systems, Inc.
    Compiled Fri 14-May-04 15:39 by dchih
    Image text-base: 0x80008120, data-base: 0x81021588

    ROM: System Bootstrap, Version 12.2(4r)XL, RELEASE SOFTWARE (fc1)

    rtr-off-02 uptime is 3 weeks, 5 days, 10 hours, 59 minutes
    System returned to ROM by power-on
    System restarted at 22:55:47 msk Tue Aug 23 2005
    System image file is "flash:c1700-k9o3sy7-mz.123-9.bin"


    This product contains cryptographic features and is subject to United
    States and local country laws governing import, export, transfer and
    use. Delivery of Cisco cryptographic products does not imply
    third-party authority to import, export, distribute or use encryption.
    Importers, exporters, distributors and users are responsible for
    compliance with U.S. and local country laws. By using this product you
    agree to comply with applicable laws and regulations. If you are unable
    to comply with U.S. and local laws, return this product immediately.

    A summary of U.S. laws governing Cisco cryptographic products may be
    found at:
    http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

    If you require further assistance please contact us by sending email to
    .

    cisco 1760 (MPC860P) processor (revision 0x200) with 83313K/14991K
    bytes of memory.
    Processor board ID FOC06370PTT (655533886), with hardware revision BB67
    MPC860P processor: part number 5, mask 2
    Bridging software.
    X.25 software, Version 3.0.0.
    1 Ethernet/IEEE 802.3 interface(s)
    1 FastEthernet/IEEE 802.3 interface(s)
    1 Serial(sync/async) network interface(s)
    1 Virtual Private Network (VPN) Module(s)
    32K bytes of non-volatile configuration memory.
    16384K bytes of processor board System flash (Read/Write)

    Configuration register is 0x2102
    Bancal, Sep 19, 2005
    #1
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  2. Bancal

    Merv Guest

    Post the config along with the following output:

    show ip cef

    show interface stats
    Merv, Sep 19, 2005
    #2
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  3. Bancal

    Merv Guest

    Post the router config along with the output of the following commands:

    show ip cef

    show interface stats
    Merv, Sep 19, 2005
    #3
  4. Bancal

    Guest

    > CPU utilization for five seconds: 95%/30%; one minute: 31%; five
    > minutes: 21%


    > PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
    > 34 101467021 50369011 2014 64.14% 20.42% 12.98% 0 IP Input
    > What's wrong with my Cisco?



    Nothing, it is routing:)

    Well, it is spending a lot of time process switching which
    you may be able to reduce unless something about the traffic
    is forcing the router to process switch it.


    95%/30% Means 95% total CPU utilisation of which 30% is "Speedy"
    switching time

    "Speedy" = Fast or Optimum or NetFlow or CEF (or in the old days
    Silicon)

    Cisco use the Term "Fast Switching" to mean any switching method
    other than Process switching AND it is also a specific
    method of Fast switching. This I find confusing, well I don't
    however I suspect that you will. <grrrrrrrrrr>

    Hence, I have introduced my own term "Speedy" which has probably
    confused things further.


    64.14% IP Input means 64% Process switching time.

    Please post the config.
    If you do a sh tech you get a partially sanitised config
    which you can take the public addresses out of if
    you want.

    Read about switching paths on CCO.

    http://www.cisco.com/en/US/products/ps6350/products_configuration_guide_chapter09186a00800ca7c9.html
    Looks not bad.

    dCEF doesn't apply to you.

    I don't think that the above document is not all that clear really.


    http://www.cisco.com/en/US/tech/tk827/tk831/technologies_white_paper09186a00800a62d9.shtml
    This one is nice but is very technical.

    Good luck.
    , Sep 19, 2005
    #4
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