I have a Cisco 2821 to acting as a SIP voice gateway to connect with Huawei NGN by sip trunk. It is facing high CPU usage during sevaral times of the day and the highest process is CCSIP_SPI_CONTRO. Sometimes, the CPU reaches 96% or higher and I can see the log:"System experiencing high cpu utilization (96/100).Call (callID=24434184) is rejected.". The quantity of the calls is about 60 at most, I think it's not the reason of high CPU. What should I do to solve the problem ? Any help will be appreciated.
The router IOS is:
2821_VOIP_13#sh version
Cisco IOS Software, 2800 Software (C2800NM-ADVENTERPRISEK9-M), Version 12.4(24)T7, RELEASE SOFTWARE (fc2)
And the active call and process cpu sorted at one same time is:
Telephony call-legs: 6
SIP call-legs: 63
H323 call-legs: 19
Call agent controlled call-legs: 0
SCCP call-legs: 0
Multicast call-legs: 0
Total call-legs: 88
2821_VOIP_13#sh processes cpu sorted
CPU utilization for five seconds: 74%/25%; one minute: 79%; five minutes: 80%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
325 1412086156 454010048 3110 26.07% 29.30% 31.40% 0 CCSIP_SPI_CONTRO
323 570261716 427812823 1332 9.75% 10.76% 11.48% 0 CCH323_CT
327 404203864 519705625 777 7.75% 8.70% 9.29% 0 CCSIP_UDP_SOCKET
116 207324456 852136717 243 2.47% 2.68% 2.76% 0 IP Input
315 99377924 320648036 309 0.63% 0.62% 0.57% 0 VOIP_RTCP
180 16123692 3524251456 0 0.55% 0.54% 0.50% 0 HQF Shaper Backg
123 152564 35192 4335 0.39% 0.53% 0.51% 0 AFW_application_
189 708 322 2198 0.39% 0.30% 0.11% 514 SSH Process
230 8961420 19417890 461 0.15% 0.02% 0.00% 0 SCCP Application
。。。。。。
