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Automatic detection of link maximum speed



I would like to ask that PRTG support automatic detection of a link's maximum speed and display via a percentage. Manually defining link speeds is unnecessary given that Cisco, Avaya, and many other manufacturers support automatic detection of link speed via SNMP.

I would like to request that the SNMP field (or even better, a drop-down for common manufacturers that ties to the appropriate MIB) become part of the SNMP bandwidth sensor and percentages become a display option on maps, etc.

bandwidth bandwidthsensor feature-request

Created on Dec 15, 2014 9:00:21 PM

3 Replies

Accepted Answer




with the SNMP traffic sensors, we currently already read the max speed values (ifSpeed / ifHighSpeed) from the according OIDs (64bit:, 32bit:

Show Traffic as Percentage

Go to the Traffic In, Traffic Out, or Traffic Total channel's setting of your SNMP Traffic sensor. In the Data section, select Display in percent of maximum. You will see the pre-populated value (if available) in the Maximum (kbit/s) field. Save your settings and the sensor will show traffic as percentage of maximum.

Created on Dec 16, 2014 10:30:55 AM by  Daniel Zobel [Product Manager]

Last change on Dec 16, 2014 10:31:56 AM by  Daniel Zobel [Product Manager]



It looks like our PRTG instance is only using the 32 bit OID and not the 64-bit.

Can we force the 64 bit vs. the 32 bit OIDs to be used? For 10Gbit links on our Avaya switches, the 32 bit value returns "-1" since the speed of 10000000000 is above the 32 bit maximum.

We had only been monitoring 10Gbps fiber interconnection links and not 1 Gbps link. I can confirm that your solution works for 1Gbps but not on 10Gbps links. For 10 Gbps links, the Maximum value is reported as "0".

Thank you for the quick response!

Created on Dec 16, 2014 12:54:35 PM



Dear mcsestretch

Please go to the PRTG device on which this sensor is attached to. Please open the device settings tab and go to the SNMP Compatibility options. Please make sure that 64 bit counters are allowed.

If you change the settings, sensors have to be created anew to use 64 bits, as existing traffic sensors cannot change their data type.

Created on Dec 17, 2014 3:02:54 PM by  Arne Seifert [Paessler Support]

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