Ive Said It Before: Check That CPU Utilization On Those Devices

You have to keep an eye out on the network devices you have.  Every now and then, check the CPU and other items like bandwidth utilization to keep a baseline on the network.  Sometimes it can get ugly without you knowing it.
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    3415051535445763988814620810100715627532880653919050520433787764246763
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%