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[MX] “show chassis fpc” does not show temperature on MX204

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Article ID: KB33189 KB Last Updated: 11 Oct 2018Version: 1.0
Summary:

When the show chassis fpc and show chassis fpc detail commands are executed on the MX204 router, no temperature value is displayed.

This article explains why no temperature value is displayed and whether some action is required to alter this behavior.

 

Symptoms:

The output of the show chassis fpc and show chassis fpc detail commands display “N/A” or “Absent” as a placeholder of temperature value.

<< Example >>

Junos 18.1R2.5

 
user@MX204> show chassis fpc

              Temp  CPU Utilization (%)  CPU Utilization (%)  Memory    Utilization (%)
Slot State    (C)  Total  Interrupt      1min   5min   15min  DRAM (MB) Heap     Buffer
  0  Online   N/A     11       0         9      9      9      3136        8          8 


user@MX204> show chassis fpc detail

Slot 0 information:
  State                               Online
  Total CPU DRAM                 3136 MB
  Total RLDRAM                    257 MB
  Total DDR DRAM                 4096 MB
  Temperature                      Absent
  Start time                          2018-09-25 10:52:27 PDT 
  Uptime                              10 hours, 48 minutes, 48 seconds
 

Junos 17.4R1.16

 
user@MX204> show chassis fpc

              Temp    CPU Utilization (%)  CPU Utilization (%)  Memory    Utilization (%)
Slot State    (C)    Total  Interrupt      1min   5min   15min  DRAM (MB) Heap     Buffer
  0  Online   Absent   8          0        8      8      8      3136      8        8


user@MX204> show chassis fpc detail

Slot 0 information:
  State                               Online
  Total CPU DRAM                 3136 MB
  Total RLDRAM                    257 MB
  Total DDR DRAM                 4096 MB
  Temperature                      Absent
  Start time                          2018-09-17 18:36:52 PDT
  Uptime                              8 days, 1 hour, 43 minutes, 20 seconds
 

*From Junos OS 17.4R2, 18.1R1, and 18.2R1, show chassis fpc shows “N/A.”

 

Cause:

The MX204 router has no board-specific temperature sensor and it is a single-board design with a logical Flexible PIC Concentrator (FPC). Therefore, the temperature field is not applicable on MX204.

For more information, see PR1263315 - Summit-1RU: "show chassis FPC" does not show temperature.

 

Solution:

This is a designed behavior of the device and part of its specification. Hence, no action is required.

 

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