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High CPU due to SSH process on 3750 switch

Hi All,

I'm facing high CPU  utilization issue due to a ssh process on 3750 switch. What is the use  of SSH proces in the switch? Can I disable it for troubleshooting?

will there be any impact if I disable it?

#sh processes cpu sorted 5min

CPU utilization for five seconds: 99%/0%; one minute: 66%; five minutes: 46%

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

159     1896078    589986       3213  3.96% 10.76% 14.00%   0 Hulc LED Process

165       32871       591      55619 77.42% 33.40%  8.85%   3 SSH Process

Regards,

Thiyagu

2 REPLIES 2
Arumugam Muthaiah
Cisco Employee

Hi Thiyagu,

  • SSH Process might go high if capturing a show tech or some debug is enabled.
  • SSH process spike occurs majorly if large amount of data being sent on the ssh session
  • Check if somebody is logged into and executing commands through an SSH session. The use of CLI commands such as show tech-support over SSH can cause very high CPU usage.
  • Ensure that session time out is enabled for the SSH process. Use the 'session-timeout minutes' line configuration command to set the timeout.
  • This doesnt impact any production traffic.

Do you see the high CPU constantly due to SSH Process? If you see high CPU still, please capture #show proc cpu sort | ex 0.00% multiple time and share the detail.

Regards,

Aru

*** Please rate if the post is useful ***

Regards, Aru *** Please rate if the post useful ***
Leo Laohoo
VIP Community Legend

High CPU due to SSH process on 3750 switch

Errrr ... you're not running IOS version 12.2(58)SE or later, are you?