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Cisco Bug: CSCvs73733 - SNMP stop working and cause High CPU on SDWAN ISR4331

Last Modified

Feb 16, 2020

Products (1)

  • Cisco XE SD-WAN Routers

Known Affected Releases

16.12.1d

Description (partial)

Symptom:
facing problem with SNMP on our SDWAN router ISR4331. After few weeks router was converted to SDWAN it started flooding log buffer by this message.

%SNMP-3-INPUT_QFULL_ERR: Packet dropped due to input queue full

Now router is not responding on SNMP and we are unable to monitor this router. There is also high cpu due to snmp process.

swki03-md06-rtr01#sh process cpu sorted
CPU utilization for five seconds: 99%/0%; one minute: 99%; five minutes: 99%
PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
757   443290910    10198551      43466 99.21% 99.23% 99.34%   0 SNMP ENGINE
104        6558        2570       2551  0.24%  0.01%  0.00%   0 DBAL EVENTS

Conditions:
ISR4331
Version 16.12.01d

configuration used:

snmp-server community onsemi-view view onsemi-view RO
snmp-server contact opsdesk@onsemi.com
snmp-server enable traps
snmp-server location SWKI03,MD06,Kista,Sweden
snmp-server trap timeout 30
snmp-server view onsemi-view 1.3.6.1 included
   no allow-service snmp
   no allow-service snmp
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