%SNMP-3-INPUT_QFULL_ERR will occur when snmp input queue is full. This happens when there are lot of snmp requests to the switch or when the SNMP process is not able to dequeue the packets from snmp input queue because of busy in processing the previous requests. This messages tells the user that there are bust of SNMP requests (device is polling very frequently) coming to the switch which SNMP process can't handle. User need to stop any SNMP queries to the device till it is recovered. We can avoid this by sending the packets with some duration between the requests (-t option in snmpwalk request)
You can see packet drops using the CLI "show snmp".
If there are bust of SNMP requests to the device, and device need to perform some lengthy operation on the request, then there are chances that queue can get full.
Can you please get the information on what are the SNMP operations are performing on this switch, like how frequently switch is poling using SNMP and which MIBs.
