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Monitoring the Chassis

The chassis properties include the status of active chassis alarms on the device, environment measurements, a summary of the field-replaceable units (FRUs), and the status of Physical Interface Modules (PIMs) on the device. To view these chassis properties, select Monitor>Chassis in the J-Web interface, or enter the following CLI show commands:

Caution: Do not install a combination of PIMs in a single chassis that exceeds the maximum power and heat capacity of the chassis. If J-series power management is enabled, PIMs that exceed the maximum power and heat limits remain offline when the chassis is powered on. To check PIM power and heat status, use the show chassis fpc and show chassis power-ratings commands. For more information, see the JUNOS Software with Enhanced Services Hardware Guide.

Table 95 summarizes key output fields in chassis displays.

Table 95: Summary of Key Chassis Output Fields

Field

Values

Additional Information
Alarm Summary 

Alarm Time

Date and time the alarm was first recorded.

 

Alarm Class

Severity class for this alarm: Minor or Major.

JUNOS has system-defined alarms and configurable alarms. System-defined alarms include FRU detection alarms (power supplies removed, for instance) and environmental alarms. The values for these alarms are defined within JUNOS.

Configurable alarms are set in either of the following ways:

  • In the J-Web configuration editor, on the Chassis>Alarm>interface-type page
  • In the CLI configuration editor, with the alarm statement at the [edit chassis] level of the configuration hierarchy

For details, see Configuring and Monitoring Alarms.

Alarm Description

A brief synopsis of the alarm.

 
Environment Information  

Name

Chassis component. For J-series devices, the chassis components are the Routing Engine and the fans.

 

Gauge Status

Status of the temperature gauge on the specified hardware component.

 

Temperature

Temperature of the air flowing past the hardware component.

 

Fan Status

Status of the fans that are regulated by JUNOS software with enhanced services software:

  • OK
  • Testing (when the device is powered on)
  • Failed
  • Absent
 

Fan Speed

Speed of the fans: normal or high speed.

Speed is adjusted automatically according to the current temperature.
Hardware Summary  

Name

Chassis component. For J-series devices, the chassis components are the Routing Engine, the Physical Interface Module (PIM) slot number (identified in the display as an FPC), and the PIM number (identified in the display as a PIC).

On J-series devices, an FPC and a PIM are the same physical unit. The PIM number is always 0.

Version

Revision level of the specified hardware component.

Supply the version number when reporting any hardware problems to customer support.

Part Number

Part number of the chassis component.

 

Serial Number

Serial number of the chassis component. The serial number of the backplane is also the serial number of the device chassis.

Use this serial number when you need to contact customer support about the device chassis.

Description

Brief description of the hardware item.

For J-series PIMs, the description lists the number and type of the ports on the PIM—identified in the display as a PIC.
FPC Summary

Slot

FPC or PIM slot number.

On J-series devices, an FPC and a PIM are the same physical unit.

Note: On SRX series services gateway, the CPU and memory utilizations are displayed only if the specified FPC <fpc slot> has the SPU units on it.

State

State of the slot:

  • Dead—Held in reset because of errors.
  • Diag—Slot is being ignored while the FPC or PIM is running diagnostics.
  • Dormant—Held in reset.
  • Empty—No FPC or PIM is present.
  • Online—FPC or PIM is online and running.
  • Probed—Probe is complete. The FPC is awaiting restart of the Packet Forwarding Engine (PFE).
  • Probe-wait—The FPC is waiting to be probed.
 

Temp (C)

Temperature of the air passing by the FPC, in degrees Celsius.

J-series devices do not monitor and report the temperature of PIMs.

CPU Utilization (%)

Total—Total percentage of CPU being used by the FPC or PIM processor.

Interrupt—Of the total CPU being used by the FPC or PIM processor, the percentage being used for interrupts.

Note: The CPU utilization of the SRX series services gateway is determined by the CPU usage of the number of SPUs installed in the device.

Use the show security monitoring fpc <fpc slot> command to monitor the CPU utilization per SPU.

For more information, see JUNOS Software CLI Reference.

Memory DRAM (MB)

Total DRAM, in megabytes, available to the FPC or PIM processor.

 

Utilization (%)

Heap—Percentage of heap space (dynamic memory) being used by the FPC or PIM processor.

Buffer—Percentage of buffer space being used by the FPC or PIM processor for buffering internal messages.

If the heap space utilization exceeds 80 percent, a memory leak might be occurring.

Note: The memory utilization of the SRX series services gateway is determined by the memory used by the number of SPUs installed in the device.

Use the show security monitoring fpc <fpc slot> command to monitor the memory utilization per SPU.

For more information, see JUNOS Software CLI Reference.
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