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CPU and Memory High Usage

mramirez-t
Beginner
Beginner

Ran into this problem with a stack of 2 3850 switches.  

 

*%OSAPI-4-CPU_OVERLOAD:Switch 2 R0/0: wcm: Warning! Task 6585 (wcm) is taking 143% (0% user 143%system)of the cpu!.
Nov 9 11:37:41.176: %PLATFORM-3-ELEMENT_CRITICAL:Switch 1 R0/0: smand: 2/RP/0: Used Memory value 100% exceeds critical level 95%
Nov 9 11:47:50.474: %PLATFORM-3-ELEMENT_CRITICAL:Switch 1 R0/0: smand: 2/RP/0: Used Memory value 100% exceeds critical level 95%
Nov 9 11:58:00.550: %PLATFORM-3-ELEMENT_CRITICAL:Switch 1 R0/0: smand: 2/RP/0: Used Memory value 100% exceeds critical level 95%
Nov 9 12:08:03.159: %PLATFORM-3-ELEMENT_CRITICAL:Switch 1 R0/0: smand: 2/RP/0: Used Memory value 100% exceeds critical level 95%

 

It caused switch 1 to drop from the stack and anything connected to it lost network communication.  Switch 1 came back but I dont have any scheduled tasks running on the switch, so I'm not sure what's cuasing this.  Any help is appreciated.

5 REPLIES 5

Reza Sharifi
Hall of Fame Expert Hall of Fame Expert
Hall of Fame Expert

Most likely an IOS bug.  You should open a ticket with TAC and send them the info.  Most of the time they will recommend an upgrade.

HTH

Leo Laohoo
VIP Community Legend VIP Community Legend
VIP Community Legend
What version is the stack running on?

mramirez-t
Beginner
Beginner

It's version 16.3.1.  We opened a ticket with our MSP on it and sent them a 'show tech' output.

Leo Laohoo
VIP Community Legend VIP Community Legend
VIP Community Legend
Roll back to 3.6.X. IOS-XE for switches is notorious for memory leak across the entire IOS range. 3.6.X, for Reza, or 3.7.X is least affected by this.

I can't speak for the 3.6.x train, but from my experience, the 3.7.x train is garbage. We had constant bugs with 3.7.1 and 3.7.3, until we moved to Denali 16.3.5b.

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