Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

Navigation
Guide That Contains This Content
[+] Expand All
[-] Collapse All

    Checking the Cooling System Alarms

    For a listing of cooling system alarm conditions, remedy, and alarm severity by routing platform type, see Display the Current Routing Engine Alarms.

    To check for cooling system alarms:

    1. Check the Alarm Indicators on the Craft Interface
    2. Display Current Cooling System Alarms
    3. Display Cooling System Error Messages in the System Log File

    Check the Alarm Indicators on the Craft Interface

    Purpose

    To check the alarm indicators on the craft interface for cooling system alarms.

    Action

    To check the craft interface alarm indicators, use the following command:

    user@host> show chassis craft-interface

    Sample Output

    user@host> show chassis craft-interface
    Status     Measurement
    Red alarm:     LED on, relay on
    Yellow alarm:  LED off, relay off
    Host OK LED:   On
    Host fail LED: Off
    
    [...Output truncated...]
    LCD screen:
         +--------------------+
         |myrouter            |
         |2 Alarms active     |
         |R: Fan Failure      |
         |R: Fan Removed      |
         +--------------------+
    

    Meaning

    The command output displays the alarm indicator status. The alarm indicators can be either On or Off. If an indicator is on, an alarm has occurred. The command output also displays the active alarms on the craft interface LCD display. To list the current alarms, use the show chassis alarms command.

    You can also physically view the craft interface to see the alarm indicators and alarm descriptions displayed on the LCD display.

    Display Current Cooling System Alarms

    Purpose

    To determine the details of the current cooling system alarms.

    Action

    For information that triggers cooling system alarms in each router type, see Gather Component Alarm Information. For fan alarms by router type, see Table 1.

    To display the current cooling system alarms, use the following command:

    user@host> show chassis alarms

    Sample Output

    user@host> show chassis alarms
    2 alarms currently active
    Alarm time               Class  Description
    2002-04-08 15:25:12 PDT  Major  Rear left fan stopped spinning
    2002-04-08 15:25:12 PDT  Major  Rear left fan Failure
    

    Meaning

    The command output displays the current cooling system alarms, including the time and date stamp, severity level, and description.Table 1 shows the possible cooling system alarms for each router type. The alarm LCD short version appears on the craft interface LCD display. The alarm long version appears at the CLI when you use the show chassis alarms command.

    Table 1: Cooling System Alarm Messages

    Routing Platform

    LCD Short Version

    CLI Long Version

    M5 and M10

    N/A

    fan-name stopped spinning

    N/A

    fan-name removed

    N/A

    Too few fans installed or working

    M7i and M10i

    N/A

    fan-name stopped spinning

    N/A

    fan-name removed

    N/A

    Too few fans installed or working

    M20

    N/A

    fan-name stopped spinning

    N/A

    fan-name removed

    N/A

    Too few fans installed or working

    M40

    fan-name FAIL

    fan-name stopped spinning

    fan-name RMVD

    fan-name removed

    Too few fans

    Too few fans installed or working

    M40e and M160

    Fan Failure

    RED ALARM - fan-name Failure

    Fan Removed

    YELLOW ALARM - fan-name Removed

    Fans Missing

    RED ALARM - Too many fans missing or failing

    M120 and M320

    Fan Failure

    RED ALARM - fan-name Failure

    Fan Removed

    YELLOW ALARM - fan-name Removed

    Fans Missing

    RED ALARM - Too many fans missing or failing

    T320 and T640

    Fan Failure

    RED ALARM - fan-name Fan Failure

    Fan Removed

    YELLOW ALARM - fan-name Fan Removed

    Fans Missing

    RED ALARM - Too many fans missing or failing

    T1600

    Fan Failure

    RED ALARM -

    fan-name Fan Failure

    Too many fans missing or failing Fan Removed

    T1600 Rear Fan Tray in LCC

    Fans Missing

    T1600 Rear Fan Tray in LCC

    Fan Removed

    YELLOW ALARM -

    fan-name Removed

    Minor – Mix of FAN-TRAYS Mix of FAN-TRAYS

    Mix of FAN-TRAYS

    TX Matrix and TX Matrix Plus

    Fan Failure

    Red ALARM -

    Failure

    Fans Missing

    RED ALARM Too many fans missing or failing

    Fan Removed

    Red ALARM - fan-name

    fan-name

    Temperature Hot

    RED ALARM Temperature Hot

    Sensor Failure

    RED ALARM Temperature sensor failure

    Temperature Warm

    YELLOW ALARM Temperature warm

    Display Cooling System Error Messages in the System Log File

    Purpose

    To determine the details of the cooling system error messages in the system log file.

    Action

    To view cooling system error messages in the system log file, use the following CLI command:

    user@host> show log messages| match fan

    Sample Output

    user@host> show log messages | match fan
    Apr  8 14:00:15 myrouter scb CM: ALARM SET: (Major) Power Supply A fan failed
    Apr  8 14:00:15 myrouter alarmd[584]: Alarm cleared: Pwr supply color=RED, class=CHASSIS, myrouter=Power Supply A fan failed
    Apr  8 14:00:18 myrouter scb CM: ALARM CLEAR: Power Supply A fan failed
    Apr  8 14:00:21 myrouter alarmd[584]: Alarm set: Pwr supply color=RED, class=CHASSIS, reason=Power Supply A fan failed
    Apr  8 14:00:23 myrouter scb CM: ALARM SET: (Major) Rear left fan stopped spinning
    Apr  8 14:05:16 myrouter alarmd[584]: Alarm set: Fan color=RED, class=CHASSIS, reason=Rear left fan stopped spinning
    

    Meaning

    The messages system log file records the time when the failure or event occurred, the severity level, a code, and a message description. Use the show log messages | match fan command to view only fan error messages. Use this information to diagnose a cooling system problem and to let the Juniper Networks Technical Assistance Center (JTAC) know what error messages were generated and the router events prior to the problem. For more information about system log messages, see the Junos OS System Log Messages Reference .

    Published: 2012-08-20