CAT3750 Temperature via OID

[thomascollins]

Hello,

I have a 3750 that should support temperature readings (WS-C3750G-48TS). In fact through CLI I can get the exact temperature:

show env all

FAN is OK

TEMPERATURE is OK

Temperature Value: 40 Degree Celsius

Temperature State: GREEN

Yellow Threshold : 56 Degree Celsius

Red Threshold : 66 Degree Celsius

POWER is OK

RPS is NOT PRESENT

So it would seem that I should be able to read the temperature via SNMP. But the OID that I thought it was, returns nothing:

snmpget -v1 -cmystring myswitch 1.3.6.1.4.1.9.9.13.1.3.1.3

Error in packet

Reason: (noSuchName) There is no such variable name in this MIB.

Failed object: SNMPv2-SMI::enterprises.9.9.13.1.3.1.3

I read somewhere else that the OID might be different because these are stackable switches? Not sure if that is true?

[nhabib · Accepted solution]

Try snmpwalk instead of snmpget and see if you have better success.

[unbrowser · Accepted solution]

It seems you are trying to retrieve this object.

CISCO-ENVMON-MIB::ciscoEnvMonTemperatureStatusValue

This is a column in the table ciscoEnvMonTemperatureStatusTable. You need to append an index to the OID if you want to retrieve table entries. You can use the snmpwalk command or a free MIB browser such as Unbrowse or iReasoning to find out the index values.

[thomascollins]

Wow perfect thanks guys. SNMPWALK showed me the correct OID. Oddly, it is .1005. Not sure why?

snmpwalk -v1 -cmystring myswitch 1.3.6.1.4.1.9.9.13.1.3.1.3

SNMPv2-SMI::enterprises.9.9.13.1.3.1.3.1005 = Gauge32: 40

Any idea what it might be .1005? It does appear to be consistant for all my switches, so it'll work.

THANKS!!!

[stormfidus]

Hi Thomas

Since its your master switch you're getting the temperature from, the 1005 number indicates that its switch number 1 which is the master..

I have a stack where switch 2 is the master, on that switch stack i need to poll the mib with .2005 at the end of the OID.

[thomascollins]

Interesting, thanks!

[Fernando Cannizzo]

Hi there, do you know the default values (normal, warning, critical) of temperature for the this catalyst. What value is for default warning and critial. Thanks

[johnnylingo]

You can see this via the "show env temp status" command.  Here's mine:

#show env temp status

Temperature Value: 28 Degree Celsius

Temperature State: GREEN

Yellow Threshold : 46 Degree Celsius

Red Threshold    : 60 Degree Celsius

Also, I created a Cacti template for graphing the temperature on a 3750 stack, if anyone's interested:

https://www.hightail.com/download/OGhjc2ZGSWhZY1FLSk1UQw