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High CPU on EOS Switch Top Task SNMP

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Information

 
TitleHigh CPU on EOS Switch Top Task SNMP
Symptoms
High CPU - top task SNMP

show system utilization cpu
Slot CPU 5 sec 1 min 5 min
---------------------------------------------------
11 1 91.2% 88.9% 88.5%
show system utilization process
Slot: 11 CPU: 1

Name ProcID 5 sec 1 min 5 min
------------------------------------------------------------
ARP / ND 1 0.0% 0.0% 0.0%
CLI 2 1.2% 0.9% 0.2%
Chassis Data Synchronization 3 0.0% 0.0% 0.0%
Connection Maintenance 4 0.4% 0.3% 0.3%
DHCP Server 5 0.0% 0.0% 0.0%
External System Monitor 6 0.0% 0.0% 0.0%
File System 7 0.0% 0.0% 0.0%
Hardware Maintenance 8 0.7% 1.4% 1.4%
IP Stack 9 6.2% 5.4% 5.2%
Image & Config Management 10 0.0% 0.0% 0.0%
Interrupts 11 0.2% 0.2% 0.2%
Operating System 12 0.0% 0.0% 0.0%
Persistent Data Management 13 0.0% 0.0% 0.0%
Router AppSvc 14 0.0% 0.0% 0.0%
Router Control Plane 15 0.0% 0.0% 0.0%
Router ICMP Error Generation 16 0.0% 0.0% 0.0%
Router Misc. 17 0.0% 0.0% 0.0%
Router Multicast 18 0.0% 0.0% 0.0%
Router Protocols 19 0.0% 0.0% 0.0%
Router VRRP 20 0.0% 0.0% 0.0%
Runtime Diagnostics 21 0.0% 0.0% 0.0%
SNMP 22 74.1% 72.5% 73.1%
 show snmp counters
--- mib2 SNMP group counters:
snmpInPkts = 65134971
snmpOutPkts = 65440782
snmpInBadVersions = 0
snmpInBadCommunityNames = 9144

syslog entry seen
<164>Nov 2 11:38:07 1.1.1.1 Emanate[11.SNMPagent]CancelTimeout: unknown timeout: 65267626
Environment
  • K-Series
  • S-Series
  • All Firmware
Cause
Another device other than Netsight was polling the Switch
Resolution
  • Take a Network Sniffer trace in order to determine which unauthorized device polling the Switch
  • Stop the polling of that device or remove from Network
Additional notes

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