Difference between SNMP monitors and Traps
|1||Pull Model: OpManager sends SNMP request to the SNMP agent running on the monitored device and receives the response.||Push Model: Monitored device(SNMP agent) sends messages in the form of traps to the trap destination(OpManager)|
|2||Communication: both ways(UDP 161)||One way. Only from device to trap destination (UDP 162)|
|3||SNMP requests can be scheduled using monitoring intervals.||Traps are spontaneous. They will reach the destination as soon as they are generated. |
|4||Custom SNMP monitors can be created for the non default metrics. These monitors convert the raw SNMP response into a meaningful metric with unit.|
Custom SNMP Trap processors are can be created for the new trap messages. They process the trap messages and convert them into meaningful alarms.
If there is no trap processor, traps will be dumped under Alarms-->Unsolicited traps.
|5||SNMP community string is mandatory to get a SNMP response ||Community string is not mandatory to receive the trap message.|
Traps wrongly processed
There are scenarios in which two trap OIDs from the same vendor are almost similar. Example .126.96.36.199.4.1.64188.8.131.52.1515 .184.108.40.206.4.1.64220.127.116.11.15 Though the user have created separate trap processors for each trap OID, an incoming trap with a trap ...
How to Receive SNMP informs in OpManager?
SNMP Notifications can be sent as Traps or Inform requests. Traps are unreliable because the Manager does not send any acknowledgment on receiving the Trap. So, the Agent cannot determine whether the Trap was received by the Manager or not. However, ...
Traps not received in OpManager
Please check below for the possible reasons for not receiving the traps and its corresponding resolution. 1. Trap port might be occupied in opmanager server. ---> Make sure the that trap port of OpManager is not occupied by trap service of Operating ...
REMOVING UNSOLICITED TRAPS FROM OPMANAGER DATABASE
Connect to OpManager database and execute the below query : Refer the link below to connect to OpManager database : https://support.zoho.com/portal/manageengine/helpcenter/articles/connecting-to-the-opmanager-database 1. Run this command from the ...
Configuring threshold values for disk partitions in OpManager
For the Servers, we discover Disk utilization using both WMI and SNMP. Also, we monitor the drive partitions that are available in those Servers. The customers found this very ...