11-23-2009 02:22 PM - edited 03-06-2019 08:42 AM
Strange problem on our 3750 stacks - when changing the config on many interfaces, the cpu utilization increases, to the point that sometimes my ssh connection to the switch is dropped, pings fail, etc. E.g. if we do this command:
int range Fa1/0/1-48
switchport access vlan 2
!
Happens consistently on all of our 3750 stacks. Running 12.2(50)SE3 (ipbasek9). Problem is worse if we run via script (i.e. send many commands one right after the other in rapid succession).
Thanks
Mike
11-23-2009 03:12 PM
ippolito wrote:
Strange problem on our 3750 stacks - when changing the config on many interfaces, the cpu utilization increases, to the point that sometimes my ssh connection to the switch is dropped, pings fail, etc. E.g. if we do this command:
int range Fa1/0/1-48
switchport access vlan 2
!
Happens consistently on all of our 3750 stacks. Running 12.2(50)SE3 (ipbasek9). Problem is worse if we run via script (i.e. send many commands one right after the other in rapid succession).
Thanks
Mike
Normal behavior, please refer to this article:
With that said, your session shouldn't drop. The problem started after upgrading to 50SE3?
Regards
Edison.
11-24-2009 06:53 AM
Thanks for the reply -- the problem has been there even in previous software versions.
09-07-2016 02:54 AM
If ME3400? Is it also normal behavior?
09-07-2016 04:12 AM
Mike,
a 'sh processes cpu sorted' should show you the process that is reponsible for the CPU utilization. Can you post the output of that exec command ?
09-07-2016 08:17 PM
Load for five secs: 83%/28%; one minute: 54%; five minutes: 56%
Time source is NTP, 10:06:05.267 bkk Thu Sep 8 2016
CPU utilization for five seconds: 83%/28%; one minute: 54%; five minutes: 56%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
184 894281414 624659521 1431 17.22% 16.79% 16.06% 0 Spanning Tree
280 17922411 8387590 2136 14.56% 1.19% 0.30% 0 SNMP ENGINE
121 98529688 193780974 508 9.39% 7.23% 8.03% 0 Hulc LED Process
71 11311244 169972899 66 4.07% 1.87% 1.94% 0 HLFM address lea
4 28817921 2308991 12480 2.97% 0.40% 0.29% 0 Check heaps
09-07-2016 10:25 PM
INFORMATION REMOVED
09-07-2016 10:25 PM
System image file is "flash:me340x-metroipaccessk9-mz.122-53.SE.bin"
cisco ME-3400G-12CS-A (PowerPC405) processor (revision C0) with 131072K bytes of memory.
Load for five secs: 99%/24%; one minute: 73%; five minutes: 67%
Time source is NTP, 12:18:40.984 bkk Thu Sep 8 2016
CPU utilization for five seconds: 99%/24%; one minute: 73%; five minutes: 67%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
276 4923536 391694 12569 39.83% 3.32% 0.69% 0 crypto sw pk pro
184 898378679 625221974 1436 14.23% 15.65% 15.76% 0 Spanning Tree
121 99664001 194014411 513 9.11% 7.12% 7.86% 0 Hulc LED Process
71 11785380 170188260 69 3.67% 3.28% 2.91% 0 HLFM address lea
141 50818137 9203177 5521 0.95% 0.65% 0.64% 0 PI MATM Aging Pr
4 28869836 2312567 12483 0.47% 0.29% 0.24% 0 Check heaps
86 19852030 78470032 252 0.47% 0.37% 0.37% 0 hpm main process
58 8591248 300612692 28 0.15% 0.16% 0.15% 0 Fifo Error Detec
89 12937781 6416237 2016 0.15% 0.17% 0.16% 0 hpm counter proc
129 2725615 1417101 1923 0.15% 0.08% 0.06% 0 HQM Stack Proces
102 510885 28670631 17 0.15% 0.05% 0.02% 0 Hulc Storm Contr
09-09-2016 12:24 AM
INFORMATION REMOVED
09-09-2016 12:24 AM
No any encryption process.
Each time differently.
Load for five secs: 100%/3%; one minute: 40%; five minutes: 35%
Time source is NTP, 10:34:23.777 bkk Fri Sep 9 2016
CPU utilization for five seconds: 100%/3%; one minute: 40%; five minutes: 35%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
184 931861303 632212539 1473 15.97% 17.17% 16.98% 0 Spanning Tree
217 4048289402886936966 0 5.27% 4.23% 4.22% 0 REP LSL Hello PP
121 103338118 196447140 526 2.71% 1.90% 1.56% 0 Hulc LED Process
141 51567399 9329846 5527 0.63% 0.61% 0.60% 0 PI MATM Aging Pr
86 20265101 79609166 254 0.15% 0.33% 0.31% 0 hpm main process
89 13128497 6503740 2018 0.15% 0.20% 0.21% 0 hpm counter proc
35 1295404 5950482 217 0.15% 0.08% 0.09% 0 Per-Second Jobs
The IOS we won't change cause services impact if it is stable.
09-09-2016 01:44 AM
The IOS we won't change cause services impact if it is stable.
INFORMATION REMOVED
09-09-2016 01:44 AM
uptime is 9 weeks, 5 days, 5 hours, 21 minutes
I found the spanning-tree instance is full 128 instances and some VLANs spanning-tree disable, we plan to change to WS-C4900M which support 4,094 instances.
Thank you very much.
09-09-2016 06:01 AM
Nice ... 4 points for helping out.
You are on your own, mate. :P
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