HP ProCurve 2910 and 2920 temperature

Question

I got an issue here. We have a bunch of HP ProCurve 2910s and 2960s switches that we need to monitor the temperature and store the data to provide proof we need better ventilation for our network closets. Not big deal, built out a Universal Device Puller pulling in the OID 1.3.6.1.4.1.11.2.14.11.1.2.8.1.1.3 with the name of hpSystemAirCurrentTemp. I then created a graph using this Universal Poller and now I can see the value.

Problem is that it is reported with the temp is that the value is being reported with unit of measurement. Its in the format of "36C". NPM does not know how to handle this info since it is not a number due to the C at the end so it can not be recorded on a chart for historical data. I did attempt to adjust the formatting in the "Define Your Universal Device Poller" but that did not fix the problem or would not show a value in NPM.

Any ideas?

rjrothwell · Accepted Answer

OK. Figured it out. I got a private messages from a member who suggested these two ideas (I would give credit but since it was a PM, I am assuming he wants to remain anonymous):

SubString or Regex would seem to be options: https://support.solarwinds.com/Success_Center/Network_Performance_Monitor_(NPM)/NPM_Documentation/NPM_Administrator_Guide/0R0_Manage_pollers_using_Device_Studio/070_Formulas_used_for_transforming_Device_Studio_poller_results

This did not work out because I could not figure out the formula.

Have you tried the Truncate option? https://support.solarwinds.com/Success_Center/Network_Performance_Monitor_(NPM)/NPM_Documentation/NPM_Administrator_Guide/0Q0_Monitor_custom_statistics_based_on_MIBs_and_OIDs_with_Universal_Device_Pollers/030_Transform_poller_results

Truncate is great just for routing off the decimal values.

This lead me to figure out using Enumeration. I built out a chart using the temp in C with the unit attached and covering that into F. I could have just used 44C=44 but I just used it to covert the 44C=111. Yes, I could have used the Transformation to covert it to C to F but that pulls the Raw Value of 44C which the value of C throws off the conversion.

This is only impacting ProCurve Switches 2610, 2848, 2910, 2920, 3500, and 5406 running Version 15 or greater OS.

The starting tail of this screen shot above was when I used 44C=44 rather than 44C=111 as for testing.