Smarts IP: How is a High Temperature threshold set in Smarts IP for Cisco and Juniper devices?

Products

• VMware

Issue/Introduction

Symptoms:


How is a High Temperature threshold set in Smarts IP for Cisco and Juniper devices?

Cisco devices in Smarts IP are not using the "High Temperature Threshold" value
The high threshold point for temperature on a Juniper and Cisco device in Smarts IP is not set using the same method

Environment

VMware Smart Assurance - SMARTS

Cause

Setting the high threshold point for temperature on Juniper and Cisco devices is not completed by the same method. The High Temperature Threshold setting in Smarts IP only applies to Juniper devices (this is specified in the Smarts SAM configuration guide, that the extra High Temperature Threshold setting is available only in the Juniper devices). For Cisco devices, the HighThreshold is calculated from the "ciscoEnvMonTemperatureThreshold" (1.3.6.1.4.1.9.9.13.1.3.1.4) provided from the device and the "Relative Temperature Threshold". Please see the definition of these settings in the polling and thresholds page of the Smarts SAM configuration guide for a complete definition of these values.

Cisco device HighThreshold calculation
If the device is a Cisco device and has a ciscoEnvMonTemperatureThreshold = 105 and the RelativeTemperatureThreshold is defined as = 10.0000
This gives a HighThreshold = 94.5000 (105 - 10%).

Juniper device HighThreshold Value
On a Juniper device, this HighThreshold Value is taken as the "High Temperature Threshold" configured in polling and thresholds. Juniper devices do not provide recommended "High Threshold" recommendations in their MIBs, so the Smarts High Temperature Threshold setting was added to facilitate the equivalent functionality on these devices as is native on Cisco devices.

Resolution

The "High Temperature Threshold" setting should only be used when configuring the temperature threshold for a Juniper device. For Cisco devices, the "RelativeTemperature Threshold" setting should be used in addition to the "ciscoEnvMonTemperatureThreshold" provided on the device.

See also KB Article emc228431 for details on how TempSensor OutOfRange events are generated on Cisco 6509 devices.