[cisco-bba] 7206vxr High cpu usage

[Wayne Lee]

Hello.

I have high CPU usage on our 7206VXR NPE-G1 with 1 gig of memory.
We are using this router for PPPoA Broadband and also BGP for internet traffic.

Current IOS ver =  (C7200-IS-M), Version 12.3(6b)
Current online users = 1845
Current BGP neighbours (full routes) = 5
Current mem usage (5 minute avg) = 292 meg
Current CPU usgae (5 min avg) = 26%
Current total throughput in = 91.09 bits per sec
Current total throughput out =     95.46 bit per sec


I've been reading the list and following the threads on high CPU usage,
we have no compression applied to the Virtual-Access interfaces. I'm
out of my depth here so any help would be appreceated.


 lc7206#sh processes cpu history

 lc7206   03:29:41 PM Wednesday May 30 2007 GMT
     1111111777771111111111111112222222222111111111111111111111
     8899999111117777788888777778888899999888889999966666888887
 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)

     4756777775765756747657666686667567576575674776756774756646
     7174316611280294166471298033315380027304655318582007071969
 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%

     8989888778867888787789988999888766877877888887888787776768677778888787
     1843021544080011839920042548801686376242697353562853996942811942043207
 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%




Current config


vpdn-group telco
 accept-dialin
  protocol l2tp
  virtual-template 106
 terminate-from hostname telco
 local name linkconnect
 lcp renegotiation always
 l2tp tunnel password 0 abc


interface Virtual-Template106
 description telco Virtual-Template
 ip unnumbered Loopback106
 ip verify unicast reverse-path
 ip load-sharing per-packet
 ip tcp adjust-mss 1400
 no logging event link-status
 peer default ip address pool dsl-dynamic
 ppp mtu adaptive
 ppp authentication chap dsl
 ppp accounting dsl
 ppp ipcp dns a.b.c.d
 ppp multilink


We are not applying any access lists to the Virtaul access interfaces.


Regards

Wayne