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Fixed incorrect divisor for #8746 #8836

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merged 1 commit into from Jun 21, 2018

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angryp commented Jun 21, 2018

This is a fix for #8746, which added support of SFP module discovery on Procurve devices. I noticed a lot of false positive alerts for current bias when we launched this in production, so looked once more through MIB/code.

MIB data:
hpicfXcvrBias - Tx bias current in microamps
hpicfXcvrBiasHiAlarm - Transceiver bias high alarm threshold limit in microamps
hpicfXcvrBiasLoAlarm - Transceiver bias low alarm threshold limit in microamps

Sensor discovery sample:
hpicfXcvrBias.49 = 23254
hpicfXcvrBiasHiAlarm.49 = 100000
hpicfXcvrBiasLoAlarm.49 = 0
hpicfXcvrBiasHiWarn.49 = 90000
hpicfXcvrBiasLoWarn.49 = 100

So yes, my mistake was to use 10^-7 instead of 10^-6 divisor for these fields. Fix is in this pull request. Sorry for the inconveniences caused.

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@laf laf added the Bug 🐞 label Jun 21, 2018

@laf

laf approved these changes Jun 21, 2018

LGTM

@laf laf merged commit 5af520a into librenms:master Jun 21, 2018

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mattie47 added a commit to mattie47/librenms that referenced this pull request Jul 2, 2018

Fixed incorrect divisor procurve current sensor divisor (librenms#8836)
This is a fix for librenms#8746, which added support of SFP module discovery on Procurve devices. I noticed a lot of false positive alerts for current bias when we launched this in production, so looked once more through MIB/code. 

MIB data: 
hpicfXcvrBias - Tx bias current in microamps
hpicfXcvrBiasHiAlarm - Transceiver bias high alarm threshold limit in microamps
hpicfXcvrBiasLoAlarm - Transceiver bias low alarm threshold limit in microamps

Sensor discovery sample: 
hpicfXcvrBias.49 = 23254
hpicfXcvrBiasHiAlarm.49 = 100000
hpicfXcvrBiasLoAlarm.49 = 0
hpicfXcvrBiasHiWarn.49 = 90000
hpicfXcvrBiasLoWarn.49 = 100

So yes, my mistake was to use 10^-7 instead of 10^-6 divisor for these fields. Fix is in this pull request. Sorry for the inconveniences caused. 

DO NOT DELETE THIS TEXT

#### Please note

> Please read this information carefully. You can run `./scripts/pre-commit.php` to check your code before submitting.

- [ ] Have you followed our [code guidelines?](http://docs.librenms.org/Developing/Code-Guidelines/)

#### Testers

If you would like to test this pull request then please run: `./scripts/github-apply <pr_id>`, i.e `./scripts/github-apply 5926`

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