Routing

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  • 1.  chassi fpc cyclic 100%

    Posted 23 days ago

    hello everyone.

    i have  a strange problem on an MX240 with MPC 3D 16x 10GE.

    this router run full internet table feed and 1 IXP with remote EVPN customer that share IXP port remotely.

    i know for sure that this FPC at 100% derive from EVPN, but i don't understand what is the culprit.

    if for example i reduce the number of interface-mac-ip number the fpc cpu slow down but not stop.

    after change from evpn to vpls back and forth the cpu stay at 36% for 1 day, and after this it start again with 100% every 2 minutes for a short span.

    router is working and traffic goes without problems.

    here some show:

                         Temp  CPU Utilization (%)   CPU Utilization (%)  Memory    Utilization (%)
    Slot State            (C)  Total  Interrupt      1min   5min   15min  DRAM (MB) Heap     Buffer
      0  Empty
      1  Online            45    100         10       86     64     60    2048       53         31
      2  Empty

    after some min or less then a minute

                         Temp  CPU Utilization (%)   CPU Utilization (%)  Memory    Utilization (%)
    Slot State            (C)  Total  Interrupt      1min   5min   15min  DRAM (MB) Heap     Buffer
      0  Empty
      1  Online            45     35          4       78     70     63    2048       53         31
      2  Empty

    Routing Engine status:
      Slot 0:
        Current state                  Master
        Election priority              Master
        Temperature                 39 degrees C / 102 degrees F
        CPU temperature             36 degrees C / 96 degrees F
        DRAM                      32699 MB (32768 MB installed)
        Memory utilization          10 percent
        5 sec CPU utilization:
          User                       1 percent
          Background                 0 percent
          Kernel                     3 percent
          Interrupt                  0 percent
          Idle                      95 percent
        1 min CPU utilization:
          User                       3 percent
          Background                 0 percent
          Kernel                     3 percent
          Interrupt                  0 percent
          Idle                      94 percent
        5 min CPU utilization:
          User                       3 percent
          Background                 0 percent
          Kernel                     3 percent
          Interrupt                  0 percent
          Idle                      94 percent
        15 min CPU utilization:
          User                       3 percent
          Background                 0 percent
          Kernel                     2 percent
          Interrupt                  0 percent
          Idle                      95 percent
        Model                          RE-S-1800x4
        Serial ID                      9016065912
        Start time                     2023-07-02 22:01:38 CEST
        Uptime                         358 days, 2 hours, 7 minutes, 9 seconds
        Last reboot reason             Router rebooted after a normal shutdown.
        Load averages:                 1 minute   5 minute  15 minute
                                           0.61       0.42       0.36

    otal system uptime 358+02:34:28, (30939958725 ms), 28943001166 thread dispatches
    CPU load is 100% (1 second), 100% (5 second)
                61% (10 second), 65% (1 minute)
    Total interrupt time 1034305748 (ms)
    
     CPU       Name      Time(ms)
     57%       Idle      17709146115
     39%    Threads      12197016414
      3%        ISR      1034305748
      3%    Level 1      1032924512
      0%    Level 2      1380763
      0%    Level 3      472
    
    Last Long Running Thread Event time 100 ms
    
     CPU       Name      Time(ms)    Count
      2%    Level 1      2      141
    
     Top Thread:
       pid      = 101
       name     = Cassis Free Timer
       time     = 3969687554 ms
       cpu      = 12%

    CPU hog check enabled
    Max run time 2500
    PID PR State     Name                   Stack Use  Time (Last/Max/Total) cpu
    --- -- -------   ---------------------  ---------  ---------------------
      2 L  running   Idle                   320/2056   0/0/17709147440 ms 57%
    101 M  asleep    Cassis Free Timer     1192/4104   0/2/3969694971 ms 12%
     81 M  asleep    L2ALM Manager         4208/8192   0/1/2541238273 ms  8%
    119 L  asleep    LU Background Service  1688/4104   0/1/1358426794 ms  4%
     45 M  asleep    SFP                   1584/4096   0/34/602377277 ms  1%
    126 L  asleep    LKUP ASIC UCODE Rebalance Service  1840/4096   1/13/341700003 ms  1%
    118 L  asleep    MQ Chip Stats          704/4104   0/1/338228277 ms  1%
    121 L  asleep    MQ Chip Stats          704/4104   0/1/332847597 ms  1%
    123 L  asleep    MQ Chip Stats          704/4104   0/1/332404882 ms  1%
    125 L  asleep    MQ Chip Stats          704/4096   0/1/332193363 ms  1%

    no kr t queue

    please let me know if someone can help me to pin point the issue. the l2vpn or evpn terminate on IXP facing interface.

    thanks a lot

    BR

    G.