1841 High CPU usage

[Russell Pearson]

Hi all,

I have a 1841 router plugged into a 100M Comcast ethernet connection. My router cpu is really high and users download speed isn't as high as before.

Can a 1841 handle 100M circuit with 100 users on it? What would cause the router's cpu to be high? I don't think there are any viruses or malware on the lan.

Any help would be appreciated.

#sh proc cpu his

r2.leaguecity-toy-startoy   06:06:26 PM Wednesday May 30 2012 PST

     111          1     1          1      111 24 1   1  1      1

    400369232222544222330359645223283294332688334452308404382236

100                                                           

90                                                           

80                                                           

70                                                            

60                                                           

50                                                           

40                                            *              

30                                            *              

20                                *       ** **               *

10  *##**      * *     * *** *    #  *   *##*## #*  ** *  *   #

   0....5....1....1....2....2....3....3....4....4....5....5....6

             0    5    0    5    0    5    0    5    0    5    0

               CPU% per minute (last 60 minutes)

              * = maximum CPU%   # = average CPU%

    438455339843          11423643653343     1  1 136346767584627         

    325952930008922225232611080609697827887864667630020933071108732332232342

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%

[nkarpysh]

Hello Russell,

Why you consider your CPU to be High?

1 hour graph showing it to be very low - around 10%. 72 hour graph showing baseline (#) also close to 10% - there are only just few spikes seen those can be related to some routing updates, spikes in traffic or telnet/ssh session done to router, etc.

I don't see any point to worry now unless you see it consistently. If it is possible - please capture "shwo proc cpu sort" during the spike to see what it is driven by.

Nik