High CPU utilization

[Ramesh Babu]

Dear Team,

We are having 2921 router. Most of the time cpu utilization is increasing, hence do the needful,

#sh processes cpu sorted

CPU utilization for five seconds: 36%/19%; one minute: 38%; five minutes: 39%
 PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
 130   324523164   606924597        534 14.00% 14.99% 15.28%   0 IP Input
 342    37754948   228358082        165  2.00%  2.07%  2.11%   0 Crypto PAS Proc
 137      739916   189748251          3  0.23%  0.28%  0.29%   0 Ethernet Msec Ti
 106      398872     6277945         63  0.15%  0.14%  0.15%   0 Netclock Backgro
 419       33032      691536         47  0.07%  0.00%  0.00%   0 OSPF-202 Hello
 304      189076    49008706          3  0.07%  0.03%  0.02%   0 MMON MENG
 405     5577240     3148185       1771  0.07%  0.05%  0.06%   0 IP NAT Ager
 204       68016     2189631         31  0.07%  0.01%  0.00%   0 CEF: IPv4 proces
 337     2949972     6035653        488  0.07%  0.08%  0.07%   0 Crypto IKMP
  87      209188     1571250        133  0.07%  0.06%  0.07%   0 Per-Second Jobs
  10          28        3562          7  0.00%  0.00%  0.00%   0 WATCH_AFS
 PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
  12           0           1          0  0.00%  0.00%  0.00%   0 Image License br
  11           0           1          0  0.00%  0.00%  0.00%   0 License Client N
  13     2713320       26114     103902  0.00%  0.13%  0.12%   0 Licensing Auto U
  15        1196      313365          3  0.00%  0.00%  0.00%   0 IPC Event Notifi
  16         308       26121         11  0.00%  0.00%  0.00%   0 IPC Dynamic Cach
   9           0           2          0  0.00%  0.00%  0.00%   0 Timers
  18           0           1          0  0.00%  0.00%  0.00%   0 IPC Zone Manager
  14     1494800     1566136        954  0.00%  0.07%  0.06%   0 Environmental mo
  17           0           1          0  0.00%  0.00%  0.00%   0 IPC Session Serv
  21           0           1          0  0.00%  0.00%  0.00%   0 IPC Process leve
  22           0           1          0  0.00%  0.00%  0.00%   0 IPC Seat Manager
 PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
  23         312       89683          3  0.00%  0.00%  0.00%   0 IPC Check Queue
  24           0           1          0  0.00%  0.00%  0.00%   0 IPC Seat RX Cont
  25           0           1          0  0.00%  0.00%  0.00%   0 IPC Seat TX Cont
  26         632      156952          4  0.00%  0.00%  0.00%   0 IPC Keep Alive M
   8           0           1          0  0.00%  0.00%  0.00%   0 DiscardQ Backgro
  28           0           1          0  0.00%  0.00%  0.00%   0 Crash writer
  29           0           1          0  0.00%  0.00%  0.00%   0 Exception contro
  19        5424     1531264          3  0.00%  0.00%  0.00%   0 IPC Periodic Tim
  20        5060     1531260          3  0.00%  0.00%  0.00%   0 IPC Deferred Por
  27        2628      313845          8  0.00%  0.00%  0.00%   0 IPC Loadometer
  33        8764     1630236          5  0.00%  0.00%  0.00%   0 ARP Background

[Mark Malone]

Hi

when you took that its only at 36% , was it much higher as you shouldn't be concerned unless the router sits at over 60% constantly ?

You have a good bit of interrupt traffic there too being process switched which will push up the cpu as its the one processing that type of traffic , 19% , this can be caused by several reasons , logging acls , cef not in place , certain traffic that's set only to process switch instead of software or the switch is being overutilised at certain times but unless its staying high I wouldn't be too concerned