Hi,

As you said this issue might happen due to SNMP time out.

To increase the SNMP time out follow the steps below :
1. Open the file \OpManager\conf\NmsProcessesBE.conf
2. In that file replace this line,

PROCESS com.adventnet.nms.poll.Collector
ARGS POLL_OBJECTS_IN_MEMORY 25 POLL_JDBC true MAX_OIDS_IN_ONE_POLL 15 AUTHORIZATION true DATA_COLLECTION_QUERY_INTERVAL 120000 PASS_THRO_ALL_POLLING_OBJECTS true CLEAN_DATA_INTERVAL 999999

with this line

PROCESS com.adventnet.nms.poll.Collector
ARGS POLL_OBJECTS_IN_MEMORY 25 POLL_JDBC true MAX_OIDS_IN_ONE_POLL 15 AUTHORIZATION true DATA_COLLECTION_QUERY_INTERVAL 120000 PASS_THRO_ALL_POLLING_OBJECTS true CLEAN_DATA_INTERVAL 999999 DATA_COLLECTION_SNMP_TIMEOUT 15

4. Save and Exit the file
5. Restart OpManager for the changes to take effect.

If issue persists refer to our knowledge base articles below,
http://support.opmanager.com:80/sd/AddSolution.sd?solID=3302

Note: Having SNMP community string other then public/private is not the reason for this issue. As you may have any name for the community string as mentioned in the device snmp configuration.


Regards,
Rex