I will use Cisco Catalyst 6509-E on the test.
To view the temperature of the sensors, connect via the console or telnet for example and execute the command:
show environment temperature
In my case, the following information was displayed:
VTT 1 outlet temperature: 30C
VTT 2 outlet temperature: 28C
VTT 3 outlet temperature: 27C
module 1 outlet temperature: 36C
module 1 inlet temperature: 25C
module 1 device-1 temperature: 25C
module 1 device-2 temperature: 32C
module 2 outlet temperature: 32C
module 2 inlet temperature: 24C
module 2 device-1 temperature: 25C
module 2 device-2 temperature: 30C
module 3 outlet temperature: 38C
module 3 inlet temperature: 28C
module 6 outlet temperature: 27C
module 6 inlet temperature: 23C
module 6 device-1 temperature: 33C
module 6 device-2 temperature: 34C
module 6 asic-1 temperature: 23C
module 6 asic-2 temperature: 24C
module 6 asic-3 temperature: 23C
module 6 asic-4 temperature: 24C
module 6 asic-5 temperature: 24C
module 6 asic-6 temperature: 23C
module 6 RP outlet temperature: 26C
module 6 RP inlet temperature: 27C
module 6 EARL outlet temperature: 33C
module 6 EARL inlet temperature: 24C
inlet is internal, outlet is external temperature.
VTT modules are located on the back of Cisco, in my case WS-C6K-VTT.
What modules stand for can be seen by typing the command:
show module
In my case: 1 (WS-X6724-SFP – module for 24 SFP ports), 2 (WS-X6724-SFP – module for 24 SFP ports), 3 (WS-X6704-10GE – module for 4 10Gb SFP+ modules XENPAK), 6 (WS-SUP720-3BXL – control module with console port).
To see this information via SNMP use the following OIDs (the first is the description, the second is the temperature):
.1.3.6.1.4.1.9.9.13.1.3.1.2
.1.3.6.1.4.1.9.9.13.1.3.1.3
You may also need OID coolers (description and status):
.1.3.6.1.4.1.9.9.13.1.4.1.2
.1.3.6.1.4.1.9.9.13.1.4.1.3
Other SNMP OID, see my article:
List of SNMP OID and MIB for Cisco