Comments on: Getting Temperature Data from a 6500 via SNMP

By: Aaron Conaway

Aaron Conaway — Tue, 29 Dec 2009 14:17:13 +0000

Hi, someone. That depends on what you want to monitor. If you want to measure the temperature of the air on the way out, then measure the outlet temperature. If you want to measure the temperature difference like Etherealmind suggested (which is how much hotter the blade/module makes the air), you would take the outlet temperature, subtract the inlet temperature, and graph the difference.

By: someone

someone — Tue, 29 Dec 2009 04:11:04 +0000

Hi.. Which OID should be put in MRTG config to monitor those temperature ?

By: Aaron Conaway

Aaron Conaway — Thu, 08 Oct 2009 13:36:00 +0000

I’m not really sure if that’s possible, Archmangle. You would think that the temperature would at least be the same out as in. Perhaps you can ask the TAC?

By: Archmangle

Archmangle — Thu, 08 Oct 2009 10:07:27 +0000

I’m using this method on a 7609 and it works perfectly, except that I see a lot of outlet temperatures lower than the inlet temperatures! Now, this could either mean the chassis is actually cooling the air in some areas, or the sensors are lying. So the question is: Is it possible the chassis could be cooling the inlet air in some cases, resulting in a lower outlet temperature?

By: shivlu jain

shivlu jain — Wed, 07 Oct 2009 13:37:54 +0000

I have never worked on it but find a useful for my network.

By: Etherealmind

Etherealmind — Wed, 19 Aug 2009 20:53:56 +0000

I have used this in the past and it works OK. The only thing to note is that it will report at temperature of about 35 degrees Celsius. Which sounds a bit warm until you realise that it is the EXHAUST temperature of the hot air LEAVING the blade. Of course it will be hotter.

The thing to monitor is the CHANGE in temperaute and set an alarm is the temperatute goes over, say, 45 degrees.

Works a treat.