Campus Switching and Routing

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New Contributor
Posts: 4
Registered: ‎08-15-2014

Can I get temperature information via SNMP from an S2500 switch?

Good hello!

 

I'm new to a job where we use Aruba, and so far, I'm impressed. Love the wireless! I do have one question which has confounded me.

 

We're using a network management tool called Zabbix (which I like, on balance, more than Nagios) and so I'm hooking up devices. Naturally, I want to get the switches.

 

As near as I can tell, in spite of the mounds of data I can extract from SNMP, there is no place that temperature is going to, in either decimal or hex form. If this isn't the case, PLEASE let me know.

 

I know I can get it by looking at inventory, but I'd rather not go through the shenanigans necessary to grep it out of a shell, or do that every minute on every switch. Monitoring does take its toll on overall performance, but I'd rather not take that large of a toll.

 

Thanks,

David

Aruba
Posts: 429
Registered: ‎05-30-2012

Re: Can I get temperature information via SNMP from an S2500 switch?

David,

You can pull the CPU temperature from the system via SNMP using the "wlsxSysExtInternalTemperature.0" element. We don't expose the other temperature values from the "show inventory" as we're less concerned with them since the CPU is typically the hottest component in the switch and it is typically a good indicator of overal system health from an environmental perspective.

 

== My Switch==

 

(host) #show inventory | include "CPU Temp"
System Temperature              : CPU Temp                : 57  C

 

== My Linux Workstation ==


[root@localhost ~]# snmpget -v 3 -n "" -u aruba -a SHA -A Aruba123 -x AES -X Aruba123 -l authPriv 10.73.4.202 wlsxSysExtInternalTemparature.0 2>/dev/null
WLSX-SYSTEMEXT-MIB::wlsxSysExtInternalTemparature.0 = STRING: 57.000000 C

 

Best regards,

 

Madani

New Contributor
Posts: 4
Registered: ‎08-15-2014

Re: Can I get temperature information via SNMP from an S2500 switch?

Excellent! That's not the temp I would have thought of as most important, but I can see the argument for that..

I'll run it for a while to get baseline values, but if you have any ballpark figures for normal ranges, that'd be nice to have.

 

Also, playing with it a little bit, I don't see any data for the other switches in the stack, alas. I do have more variation in the stack than I would have expected.

 

Also, do fan rpms get pushed out?
Thanks SO much...

Aruba
Posts: 429
Registered: ‎05-30-2012

Re: Can I get temperature information via SNMP from an S2500 switch?

[ Edited ]

David,

Sorry for the delay responding, you're right, I just noticed the stack values aren't (EDITED) populating in the WLSX-SYSTEMEXT-MIB. I'll need to check with engineering on that one. Regarding fan speeds, we do not currently populate them in SNMP from a MIB perspective but if a fan were to fail, we will send a trap. Also here is a handy set of tables to give you an idea of the temperature versus fan speed.

 

Screen Shot 2014-08-19 at 5.54.50 PM.png

New Contributor
Posts: 4
Registered: ‎08-15-2014

Re: Can I get temperature information via SNMP from an S2500 switch?

No worries about the delay! I've got PLENTY to occupy myself with based on that. :)

Thanks for the help!

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