01-16-2014 07:29 AM - edited 03-07-2019 05:36 PM
we had a couple of old 3750 switches were getting high cpu in the past, https service are enabled. will it fix the issue by turing off the https? thanks.
Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 52 WS-C3750G-48TS 12.2(50)SE4 C3750-IPBASEK9-M
sh processes cpu sorted
CPU utilization for five seconds: 100%/0%; one minute: 99%; five minutes: 99%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
213 13888233 2049823 6775 92.81% 92.88% 92.62% 0 HTTP CORE
96 941374299 111674274 8429 0.79% 0.78% 0.79% 0 hpm counter proc
35 37490648 1911604 19612 0.47% 0.04% 0.00% 0 Per-minute Jobs
141 378822583 22574282 16781 0.31% 0.31% 0.31% 0 HQM Stack Proces
39 39939532 22575950 1769 0.15% 0.06% 0.05% 0 Compute load avg
258 396813 233817483 1 0.15% 0.01% 0.00% 0 PM Callback
#sh run | in http
no ip http server
ip http secure-server
sh processes cpu sorted
CPU utilization for five seconds: 100%/0%; one minute: 99%; five minutes: 99%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
213 13888233 2049823 6775 92.81% 92.88% 92.62% 0 HTTP CORE
96 941374299 111674274 8429 0.79% 0.78% 0.79% 0 hpm counter proc
35 37490648 1911604 19612 0.47% 0.04% 0.00% 0 Per-minute Jobs
141 378822583 22574282 16781 0.31% 0.31% 0.31% 0 HQM Stack Proces
39 39939532 22575950 1769 0.15% 0.06% 0.05% 0 Compute load avg
258 396813 233817483 1 0.15% 0.01% 0.00% 0 PM Callback
#sh run | in http
no ip http server
ip http secure-server
01-16-2014 09:37 AM
Hello,
HTTP CORE process is related to HTTP request destined to the switch itself. You would want to check "show tcp brief" and "show ip http server all" commands to see the originators from those request when the CPU goes high again.
Action plan
Use the following steps to manually clera htt/https hung up sessions:
1) Issue the command "clear ip http client cache all"
2) If this does not help, issue the command "show tcp brief"
3) Take the output "TCB" addresses from the previous command and place them instead of the brackets in the following command:
clear tcp tcb
4) If you are using http and if the issue was due to HTTP request to the switch, the command "no ip http secure-server" would work out avoiding from re-ocurring.
Hope this helps.
Haihua
01-16-2014 11:21 AM
thanks Haihua - that's really helpful, I will try it later. - Yan
01-16-2014 12:04 PM
Upgrade to 12.2(55)SE8.
IOS you are using isn't stable.
03-14-2018 03:07 PM
Hi Haihua,
Thanks for your help, but i just want to know how to troubleshoot with those which you provided...
show tcp brief, show ip http server all
Please let me know.
06-25-2018 06:41 AM
Hi
I solved HTTP CORE high CPU utilization issue using your suggestions. To be more precise, I solved issue with this:
"4) If you are using http and if the issue was due to HTTP request to the switch, the command "no ip http secure-server" would work out avoiding from re-ocurring."
BTW: My switch info is next - WS-C3750X-24P - 12.2(55)SE8 - C3750E-UNIVERSALK9-M
Thanks,
Petar
06-29-2021 05:26 AM
Hello,
We have the same issue year 2021 with CISCO 2960X IOS 15.2(7)E3
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