The Heartbeat Agent utilizes the SNMP (v1, v2c & V3), when available on the remote host, to gather more information from the monitored device. Using SNMP the following information can be retrieved:
•Disk Space information
•Running processes (alerting only)
The heartbeat agent will attempt to detect certain features on a remote host automatically and retrieve the associated information via SNMP. Supported features are listed below.
When VMWare is detected on a remote host, a VM inventory is retrieved from the remote host and available on the Inventory - Virtual Machine page. The following details are available:
•Current VM status
•VM Operating System (if tools are installed)
•Path to .vmx file
MAC to Switch Port Mapping
If the monitored device is a switch, the MAC address to switch part mappings are automatically retrieved and available on the Inventory - Switch page. The MAC addresses are correlated to hardware information obtained by the agents and the ARP daemon so that host names can be displayed whenever possible.
The SNMP capabilities of a remote device are determined automatically when the heartbeat agent initializes after startup, and event 11020 is logged for every device which supports at least SNMP v1.
All features require that the respective system health object (e.g. disk space, performance monitoring) is assigned to the monitored hosts.
If no disk space, performance or software/hardware inventory object is assigned to a host, it will not be monitored via SNMP.
EventSentry will suspend SNMP monitoring of a host under the following conditions:
1.The Heartbeat Service is unable to query a remote host via SNMP during the first monitoring interval after service startup.
2.The Heartbeat Service is unable to query a remote host via SNMP for more than 24 hours, event id 11023 will be logged and SNMP monitoring will be disabled for the host.
3.The Heartbeat Service is unable to query a remote host via SNMP at least 50% of the time during a 48-hour period, event id 11015 will be logged and SNMP monitoring will be disabled for the host.
To re-enable SNMP monitoring, follow the instructions in the logged event or open the management console, locate & click the host inside its respective computer group and finally click the SNMP-related warning to re-enable SNMP monitoring.