DCE sensor disappear after interval of time

[DCIM_Support]

This question was originally posted on DCIM Support by Gleb Tyunikov on 2019-09-25

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Hello team,

Another question about a situation i am facing in DCE.

I discovered a PDU with a sensor chain of 3 sensors using my DCE server and for the first couple of minutes all seems to work fine, i did a few testing on the temperature and noticed that one of my temperature sensors is missing.

I check my other connected device and the same thing was happening over there with the same sensor.

I logged in to the PDU device to see if the problem was with the device but the data was there and it was live.

I tried to see maybe there some kind of issue with the sensor but after rediscovering it with DCE I can see for another few minutes and then it is disappearing again. 

Did anyone encounter something like this before?

Best regards and thanks

(CID:149291920)

[DCIM_Support]

This comment was originally posted on DCIM Support by spezialist on 2019-09-25

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Dear Gleb Tyunikov,

What PDU model/type and which sensors? What does “disappear” mean - have they switched to Unplugged state? Can you attach a couple of screenshots from DCE and from PDU GUI?

With respect.

(CID:149291928)

[DCIM_Support]

This comment was originally posted on DCIM Support by Gleb Tyunikov on 2019-09-25

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Thank you for the answer,

Unfortunately i cannot provide any screenshots but i will try and explain the issue.

Im using Raritan PX3 PDU with DPX-T3H1 sensors.

After discovery i can see 7 temperature lines

1 - Temperature 1 status = normal

2 - Temperature 1  degrees = 24 c

3 - Temperature 2 status = normal

4 - Temperature 2  degrees = 25 c

5 - Temperature 3 status = normal

6 - Temperature 3  degrees = 26 c

7 - External Temperature sensor = (value of sensor X for example-sensor 1)

after a few minutes it changes to this (as you can see now line 4 is not present) : 

1 - Temperature 1 status = normal

2 - Temperature 1  degrees = 24 c

3 - Temperature 2 status = normal

5 - Temperature 3 status = normal

6 - Temperature 3  degrees = 26 c

7 - External Temperature sensor = (value of sensor X for example sensor 1)

and the DCO sees the Temperature sensor 2 as the External sensor but it holds the degrees of sensor X (that is for example-sensor 1)

I hope this was helpfull

(CID:149291987)

[DCIM_Support]

This comment was originally posted on DCIM Support by spezialist on 2019-09-25

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Dear Gleb Tyunikov,

Unfortunately i cannot provide any screenshots but i will try and explain the issue.

This is bad, since it is often better to see once than to hear many times. I hope you have full access to the DCE-server and PDU?

Can you say which DDF-files and which versions you use to discover the specified PDUs with sensors?

If you have installed DCE-7.6.0 and higher, then you can do snmpwalk on your problematic PDU twice with an interval of several minutes (see for example How to create an SNMP walk file in the Data Center Expert 7.6.x web client). Having received two snmpwalk files, you can compare them. This procedure must be done.

Please do this and report the result.

and the DCO sees the Temperature sensor 2 as the External sensor but it holds the degrees of sensor X (that is for example-sensor 1)

Perhaps this is a mistake and did you mean DCE?

With respect.

(CID:149292155)

[DCIM_Support]

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