[c-nsp] Unknown reason for High CPU 3620

[Alex Foster]

I have a 3620 that is currently maxing out its CPU for no apparent
reason - the traffic load on it at the moment is about 1 to 2 meg - and
sh proc cpu doesn't indicate any process that is causing the high CPU
util.  Most of the traffic is SIP but I wouldn't have thought this would
have any bearing.  There are only two interfaces on the box in use - an
ATM 155 and a 10bt.  The traffic from the 10bt is bridged to a PVC on
the ATM interface - nothing complicated.  

 

#sh proc cpu

CPU utilization for five seconds: 96%/93%; one minute: 90%; five
minutes: 91%

 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process

   1      194708       9899756         19    0.00%  0.00%  0.00%   0
Load Meter

   2        2008          223                9004  1.41%  0.13%  0.03%
66 Virtual Exec

 

#sh mem sum

                Head    Total(b)     Used(b)     Free(b)   Lowest(b)
Largest(b)

Processor   61D70EA0    12120416     6616992     5503424     5303744
5305428

      I/O    2900000     7340032     4387068     2952964     2920520
2947260

 

#sh int e1/0

Ethernet1/0 is up, line protocol is up

  Hardware is AmdP2, address is 0005.3245.e070 (bia 0005.3245.e070)

  Description: 

  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,

     reliability 255/255, txload 34/255, rxload 37/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:00, output 00:00:00, output hang never

  Last clearing of "show interface" counters 1y4w

  Queueing strategy: fifo

  Output queue 0/40, 0 drops; input queue 0/75, 103522 drops

  5 minute input rate 1470000 bits/sec, 1984 packets/sec

  5 minute output rate 1355000 bits/sec, 2166 packets/sec

     2150894411 packets input, 1646909945 bytes, 0 no buffer

     Received 88151770 broadcasts, 0 runts, 0 giants, 0 throttles

     6397644 input errors, 42166 CRC, 32878 frame, 0 overrun, 6355422
ignored

     0 input packets with dribble condition detected

     2681876495 packets output, 1769855380 bytes, 0
underruns(556991/1663306/0)

     165 output errors, 2220297 collisions, 50 interface resets

     0 babbles, 47 late collision, 1067254 deferred

     118 lost carrier, 0 no carrier

     0 output buffer failures, 0 output buffers swapped out

 

#sh int atm 0/0.2

ATM0/0.2 is up, line protocol is up

  Hardware is RS8234 ATMOC3

  MTU 4470 bytes, BW 155000 Kbit, DLY 80 usec,

     reliability 255/255, txload 2/255, rxload 2/255

  Encapsulation ATM

  3075506957 packets input, 1094442885139 bytes

  2362546968 packets output,988686523562 bytes

  0 OAM cells input, 0 OAM cells output

  AAL5 CRC errors : 81

  AAL5 SAR Timeouts : 0

  AAL5 Oversized SDUs : 0

  AAL5 length violation : 26

  AAL5 CPI Error : 0

 

Thanks 

 

Alex



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