Check the Router Component Status

1. Check the Router Craft Interface
2. Check the Component LEDs
3. Display Detailed Component Environmental Information
4. Display Detailed Operational Information About Components

Check the Router Craft Interface

Purpose

To confirm that the craft interface is functioning properly by checking the alarm indicator status or by checking the craft interface physically.

Action

To check the craft interface information for router status, do one of the following:

• Use the following CLI command:
  user@host> show chassis craft-interface

  The command output displays the router alarm indicator status, the LCD display information (router name, router uptime, and status message that rotate at 2-second intervals), and the major component LED status.

• Physically look at the router craft interface. Table 18 shows the component characteristics of the craft interface for each M-series router and T-series platform.

  Table 18: Craft Interface Components for the M-series Routers and T-series Platforms

  Component	M5 and M10	M20	M40	M40e	M160	T320	T640
  Alarm LEDs	X	X	X	X	X	X	X
  Lamp test button	X					X	X
  Alarm cutoff button		X		X	X	X
  Alarm relay contacts		X	X
  Link and activity status lights	X	X
  LCD display and navigation buttons			X	X	X	X	X
  Routing Engine ports	X	X	X
  Routing Engine LEDs		X	X			X
  Host module LEDs				X
  Host subsystem LEDs						X	X
  Physical Interface Card (PIC) online and offline buttons	X
  Flexible PIC Concentrator (FPC) LEDs		X	X	X	X	X	X
  FPC offline buttons		X		X		X	X
  FPC online buttons						X	X
  Switch Interface Board (SIB) LEDs						X	X

Check the Component LEDs

Purpose

To confirm that the component LEDs are functioning properly by checking either that the output messages, physically checking the craft interface or examining the LEDs on the component faceplate.

Action

To check the component LED status, do one of the following:

• Use the following CLI command:
  user@host> show chassis craft-interface

  The output shows the messages that are currently displayed on the craft interface (for routers that have a display on the craft interface).

  For examples of sample output, see the Junos System Basics and Services Command Reference.

• Physically look at the craft interface. You see the following component LEDs: Routing Engine, FPCs, PICs, host module (for M40e and M160 routers), and host subsystem and SIB (for T-series platforms).
• Look at the LEDs on the component faceplate. Table 19 describes where the LEDs are located on the router or platform.

  Table 19: Component LED Location on the Router or Platform

  Component	LED Location on the Router	Router or Platform
  CB	On the Control Board (CB) faceplate.	T320 router and T640 routing node
  FPC	On the FPC faceplate at the front of the router.	M20, M40, M40e, and M160 routers
  Host module	On the craft interface. Remove the component cover.	M40e and M160 routers
  MCS	On the Miscellaneous Control System (MCS) faceplate at the rear of the router. Remove the component cover.	M40e and M160 routers
  PIC	On the craft interface. On the PIC faceplate at the front of the router.	M5 and M10 routers All other routers
  PCG	On the PFE clock generator (PCG) faceplate at the rear of the router. Remove the component cover.	M40e and M160 routers
  Power supply	On the power supply faceplate at the bottom rear of the router.	All routers
  Routing Engine	On the rear Routing Engine panel. On the craft interface.	M20 router M20, M40, M40e, and M160 routers
  SCB	On the System Control Board (SCB) faceplate at the front of the router, vertical in the middle of the FPC card cage.	M40 router
  SCG	On the SONET Clock Generator (SCG) faceplate.	T320 router and T640 routing node
  SFM	On the Switching and Forwarding Module (SFM) faceplate at the rear of the router. Remove the component cover.	M40e and M160 routers
  SIB	On the SIB faceplate.	T320 router and T640 routing node
  SSB	On the System and Switch Board (SSB) faceplate at the top front of the router.	M20 router

Display Detailed Component Environmental Information

Purpose

To check the component environmental information for the uptime to determine if it is functioning properly.

Action

To display detailed environmental status information about a component, use the following CLI command:

The command output displays the temperature of the air passing by the component, in degrees Centigrade. It also displays the total percentage of CPU, interrupt, heap space, and buffer space being used by the component processor, including the total DRAM available to the component processor. The command output displays the time when the component started running and how long the component has been running. A short uptime can indicate a problem with the component.

For examples of sample output, see the Junos System Basics and Services Command Reference.

Table 20 lists the operational mode CLI commands that display more detailed information for each router and platform component.

Display Detailed Operational Information About Components

Purpose

To check the component environmental information for the uptime to determine if it is functioning properly.

Action

To display detailed operational information about a component, use the following CLI command:

The command output displays the temperature of the air passing by the component, in degrees Centigrade and Fahrenheit. It displays the total percentage of CPU, interrupt, heap space, and buffer space being used by the component processor, including the total DRAM available to the component processor. The command output displays the time when the component started running and how long the component has been running. A short uptime can indicate a problem with the component.

For examples of sample output, see the Junos System Basics and Services Command Reference.

Table 21 lists the components for which you can display more detailed operational status information.