Switch CPU SNMP trap configuration

[stanley783783783]

I have configured and working deployment - catalyst 3750 sending traps to zabbix, which are received and processed correctly.

Configured to send CPU notification via:

snmp-server enable traps cpu threshold

Q: Do i also have to configure threshold values and statistic as stated in examples from link below or that is not necesarry?:

https://www.cisco.com/c/en/us/td/docs/ios/netmgmt/configuration/guide/15_0s/nm_15_0s_book/nm_cpu_thresh_notif.html

process cpu statistics limit entry-percentage 40 size 300 
process cpu threshold type total rising 80 interval 5 falling 20 interval 5

Asking if there is any default value already configured, or traps are not sent until i configure specific values. I found for ASA there is 95% for critical threshold, but found no such information for Catalyst or Nexus switches.

[marce1000]

 - There will certainly be default values. Perhaps they could be revealed by running command completion with question marks when entering one of the commands. A ?  at a certain point may provide short documentation of the intended command with defaults being listed (not sure though). Another source maybe the MIB for the relevant (trap-)OID's for the switch-model were defaults might be documented too. Or perhaps in show running-config all.

 M. 

[stanley783783783]

Well, in both cases, i found no default value. In "show running-config all", command for threshold was not mentioned also. I changed it to 30% to generate example trap and then unconfigured with

no process cpu threshold type total

any idea if default value is taken back for being used or i unconfigured it completely? I still can not confirm it was set by default.

Also posting SNMPv3 trap i recieved, might be useful for someone.

Provided by "snmp-server enable trap cpu threshold" and "process cpu threshold type total rising 30 interval <number>":

  DISMAN-EXPRESSION-MIB::sysUpTimeInstance type=67 value=Timeticks: (1216327920) 140 days, 18:41:19.20
  SNMPv2-MIB::snmpTrapOID.0      type=6  value=OID: CISCO-PROCESS-MIB::cpmCPURisingThreshold
  CISCO-PROCESS-MIB::cpmCPURisingThresholdValue.1.total type=2  value=INTEGER: 30
  CISCO-PROCESS-MIB::cpmCPUTotalMonIntervalValue.1 type=2  value=INTEGER: 32
  CISCO-PROCESS-MIB::cpmCPUInterruptMonIntervalValue.1 type=2  value=INTEGER: 1
  CISCO-PROCESS-MIB::cpmProcExtUtil5SecRev.1.174 type=2  value=INTEGER: 19
  CISCO-PROCESS-MIB::cpmProcessTimeCreated.1.174 type=67 value=Timeticks: (357334455) 41 days, 8:35:44.55
  CISCO-PROCESS-MIB::cpmProcExtUtil5SecRev.1.86 type=2  value=INTEGER: 2
  CISCO-PROCESS-MIB::cpmProcessTimeCreated.1.86 type=67 value=Timeticks: (357334457) 41 days, 8:35:44.57
  CISCO-PROCESS-MIB::cpmProcExtUtil5SecRev.1.129 type=2  value=INTEGER: 1
  CISCO-PROCESS-MIB::cpmProcessTimeCreated.1.129 type=67 value=Timeticks: (357334362) 41 days, 8:35:43.62

Provided by "snmp-server enable traps syslog" (i guess)

  DISMAN-EXPRESSION-MIB::sysUpTimeInstance type=67 value=Timeticks: (1216247919) 140 days, 18:27:59.19
  SNMPv2-MIB::snmpTrapOID.0      type=6  value=OID: CISCO-SYSLOG-MIB::clogMessageGenerated
  CISCO-SYSLOG-MIB::clogHistFacility.18498 type=4  value=STRING: "SYS"
  CISCO-SYSLOG-MIB::clogHistSeverity.18498 type=2  value=INTEGER: 2
  CISCO-SYSLOG-MIB::clogHistMsgName.18498 type=4  value=STRING: "CPURISINGTHRESHOLD"
  CISCO-SYSLOG-MIB::clogHistMsgText.18498 type=4  value=STRING: "Threshold: Total CPU Utilization(Total/Intr): 31%/0%, Top 3 processes(Pid/Util):  174/20%, 86/3%, 129/1%"
  CISCO-SYSLOG-MIB::clogHistTimestamp.18498 type=67 value=Timeticks: (1216247917) 140 days, 18:27:59.17

on:

Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 15.0(1)SE, RELEASE SOFTWARE (fc1)