The thermal monitoring facility uses temperature sensors, placed at
several different points in the line card, to monitor the thermal threshold
levels. Each temperature sensor is monitored against the thermal threshold
levels that are specific to the sensor.
The table shows the sensors monitored and their corresponding
thresholds.
 Note |
The thermal thresholds shown in the table are predefined and you
cannot configure or modify them.
|
Table 2 Thermal Thresholds for the Cisco UBR-MC20X20V Line Card
Sensor
|
Minor Threshold (in Celsius)
|
Major Threshold
(in Celsius)
|
Critical Threshold
(in Celsius)
|
Nickel 10G
|
82
|
87
|
92
|
CPU
|
73
|
78
|
83
|
Inlet
|
68
|
73
|
78
|
Remora
|
82
|
87
|
92
|
Coldplay
|
75
|
80
|
85
|
Waxbill
|
92
|
97
|
102
|
Fauna
|
82
|
87
|
92
|
Flora
|
80
|
85
|
90
|
Toucan FPGA A
|
94
|
97
|
100
|
Toucan FPGA B
|
94
|
97
|
100
|
Toucan FPGA C
|
94
|
97
|
100
|
The Cisco UBR-MC20X20V cable interface line card thermal monitoring has
three levels of monitoring thresholds: Minor, Major, and Critical. The table
shows the thresholding states and their corresponding descriptions.
Table 3 Thresholding States for the Cisco UBR-MC20X20V Line Card
State
|
Description
|
Minor
|
The temperature sensor moves to minor state when the sensor
readings stay constant for 2 minutes between minor and major (>= minor and
< major) thresholds.
|
Major
|
The temperature sensor moves to major state when the sensor
readings stay constant for 2 minutes between major and critical (>= major
and < critical) thresholds.
|
Critical
|
The temperature sensor moves to critical state when the sensor
readings stay above the critical (>= critical) threshold.
|
The temperature sensors are monitored every 2 minutes, with a soaking
interval (A soaking interval defines how long a condition must persist before
an alarm is declared.) of 2 minutes for minor and major events; there is no
soaking interval for critical events.
The following alerts are generated on the Cisco UBR-MC20X20V cable
interface line card:
- A syslog error message is
generated when a thermal threshold is broken. The syslog error message contains
sensor name, reading, threshold state, value, event timestamp, and card power
level.
- Alarms and SNMP traps are
generated when the inlet sensor crosses its threshold.
 Note |
A high availability (HA) switchover is not initiated for the Cisco
UBR-MC20X20V cable interface line card when the temperature sensors cross the
critical threshold.
|
The temperature history of the router is maintained for an hour, with
timestamp. It can be viewed using the show environment command. The show
environment command displays the PRE temperature, fan status, power supply
details, and the thermal and power status of the line card. The slot/subslot
option of the show environment command helps to identify the location of the
line card.
The thermal monitoring data is exclusive to the Cisco UBR-MC20X20V
cable interface line card. When the line card is reset or removed, the
outstanding temperature alarm is cleared. However, you can still view the
temperature history of the line card that was maintained by the OBFL feature
using the show logging onboard slotindex temperature command.
In the event of a line card crash, the temperature history of the line
card is viewable from the crashinfo file. The crashinfo file contains the
temperature history of the line card for the last one hour before the crash.
The data is displayed using the show logging onboard command. See the
Onboard Failure Logging feature guide for more details.
A PRE switchover does not impact the monitoring functionality of the
line card. All the outstanding temperature threshold alarms are retained.