SNMP Tweaks Settings
SNMP Tweaks Settings
This section allows to enter the SNMP Timeout in seconds (5 to 20 seconds is recommended). As with most other network protocols a sending device (i.e. the computer running PRTG Traffic Grapher) sends out a request to another device and waits to receive a response. This definable value basically allows to configure a delay within which the SNMP response must be received. Should a SNMP response not be received within this specified timeout value, the SNMP sensor will be registered as not being measurable and the sensor will be shown in red to show the error status.
If your PC is a multi-homed system with more than one IP address you may need to specify the IP address that PRTG uses to contact the devices in the Bind IP setting.
The checkbox High Compatibility Mode should be marked if you get coverage values below 100% although PRTG and the device are running continuously. It is a feature specifically designed for very sensitive routers and devices, introducing a delay between scanning, allowing these sensitive devices to function properly with PRTG Traffic Grapher.
Note: The High Compatibility Mode may reduce the performance by a small amount!
The High Compatibility Mode also features advanced functionality, accessible via the Advanced button:
· Increase Delays – In certain cases, devices may have trouble with fast sequences of SNMP requests, caused by PRTG Traffic Grapher. With this checkbox checked, the delay time between SNMP requests is increased from 10 to 500 ms for proper functionality with such devices.
· Retry SNMP Requests – Should an SNMP request fail, checking this checkbox will cause PRTG Traffic Grapher to try the request again. This is useful for devices that fail to respond at times to certain requests.
· Ignore Overflow Value – Some devices handle device overflows incorrectly. This can cause false peaks at regular intervals. Checking this checkbox causes PRTG Traffic Grapher to ignore these overflow values and thus eliminate errors caused by this problem.
· Ignore Zero Values in delta Sensors – This setting may be necessary for some devices.