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New Member

CPU Process 99%

I got a 1600 which until now was running fine. Now It's slow; access is slow. I looked at it's process and it seems to be at 99%. Where do I start?

CPU utilization for five seconds: 99%/87%; one minute: 99%; five minutes: 99%

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

1 9364 12255 764 0.00% 0.00% 0.00% 0 Load Meter

2 80 33 2424 0.32% 0.08% 0.02% 2 Virtual Exec

3 1381280 12246 112794 0.00% 0.44% 0.54% 0 Check heaps

4 204 157 1299 0.00% 0.00% 0.00% 0 Pool Manager

5 0 2 0 0.00% 0.00% 0.00% 0 Timers

6 48464 29875 1622 0.00% 0.03% 0.01% 0 ARP Input

7 0 1 0 0.00% 0.00% 0.00% 0 SERIAL A'detect

8 40314020 2670939 15093 11.29% 6.92% 6.82% 0 IP Input

9 7108 9303 764 0.00% 0.02% 0.00% 0 CDP Protocol

10 0 1 0 0.00% 0.00% 0.00% 0 Asy FS Helper

11 16144 52711 306 0.00% 0.09% 0.09% 0 IP Background

12 3180 12009 264 0.00% 0.00% 0.00% 0 TCP Timer

13 16 6 2666 0.00% 0.00% 0.00% 0 TCP Protocols

14 4 1 4000 0.00% 0.00% 0.00% 0 RARP Input

15 904 585 1545 0.00% 0.00% 0.00% 0 BOOTP Server

16 114648 1042 110026 0.00% 0.12% 0.16% 0 IP Cache Ager

17 0 1 0 0.00% 0.00% 0.00% 0 Inspect Timer

18 0 1 0 0.00% 0.00% 0.00% 0 Critical Bkgnd

19 1268 3430 369 0.00% 0.00% 0.00% 0 Net Background

20 4 9 444 0.00% 0.00% 0.00% 0 Logger

21 23372 51756 451 0.00% 0.02% 0.00% 0 TTY Background

22 15892 51763 307 0.08% 0.02% 0.00% 0 Per-Second Jobs

23 52980 51762 1023 0.08% 0.03% 0.05% 0 Net Periodic

24 12440 36364 342 0.00% 0.00% 0.00% 0 Net Input

25 7992 12256 652 0.08% 0.01% 0.00% 0 Compute load avgs

26 32468 1050 30921 0.00% 0.04% 0.00% 0 Per-minute Jobs

27 1276024 1075388 1186 1.44% 1.60% 1.59% 0 IP NAT Ager

28 212 236 898 0.00% 0.00% 0.00% 0 IP SNMP

29 0 1 0 0.00% 0.00% 0.00% 0 SNMP Traps

30 2192 1064 2060 0.00% 0.00% 0.00% 0 IP-RT Background

  • Other Network Infrastructure Subjects
14 REPLIES
Silver

Re: CPU Process 99%

ip input is the process that is utilizing the CPU the most. IPINPUT is process switching . Are you process switching on a lot of your interfaces ? If the code supports Cef switching enable cef switching, 'ip cef' globally & ' ip route-cache cef' on the interface . If it does not enable fast switching ' ip route-cache.

This should lower the processor utilization .

New Member

Re: CPU Process 99%

The version of IOS is 11.2(15)P and I didn't see the ip cef command. I guess the IOS version is too old. I tried the ip route-cashe on each interface and it look like the IPinput went down, but the processor is still at 99%.

Silver

Re: CPU Process 99%

when you do a sh proc cpu , what do the processes show for utilization .

New Member

Re: CPU Process 99%

there are only two process which show up as being active

49215356 2690686 18291 8.49% 7.18% 7.48% 0 IP Input

1492692 1085894 1374 1.30% 1.56% 1.65% 0 IP NAT Ager

the rest are less than a percent

Silver

Re: CPU Process 99%

If you do a sh users are there any hung sessions ?

New Member

Re: CPU Process 99%

I should be the only one this router, but never the less, on ones else is on the router and no hung vty service.

Silver

Re: CPU Process 99%

any changes , any new protocols introduced on your lan / Wan ?

New Member

Re: CPU Process 99%

ok, I have no control with protocols over are lan/wan. I just reboot the sucker. That made the router get to a nomal speed. CPU 55%-85%. It took about 3mins to get back to the slowness. So, what can I do about the protocols?

Any way I can find out if it's hardward problem?

Silver

Re: CPU Process 99%

Look at each interface , 'sh interface' THis will give you stats on all the interfaces. Look for an interface that has a high load. i.e 160/255 .

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