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Home Documentation MX204 Universal Routing Platform Hardware Guide Maintaining Components

MX204 Universal Routing Platform Hardware Guide

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MX204 Universal Routing Platform Hardware Guide
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Maintaining MX204 Cooling System Components

date_range 11-Sep-24
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Maintaining the MX204 Fan Module

Purpose

For optimum cooling, verify the condition of the fans.

Action

  • Monitor the status of the fans. A fan module contains multiple fans that work in unison to cool the router components. If one fan fails, the router adjusts the speed of the remaining fans to maintain proper cooling. A red alarm is triggered when a fan fails, and when a fan module is removed.

  • To display the status of the cooling system, issue the show chassis environment command. The output is similar to the following:

    content_copy zoom_out_map
    user@host> show chassis environment
Class Item                           Status     Measurement
Temp  CB 0 Top Right Inlet Sensor    OK         35 degrees C / 95 degrees F
      CB 0 Top Left Inlet Sensor     OK         38 degrees C / 100 degrees F
      CB 0 Top Right Exhaust Sensor  OK         45 degrees C / 113 degrees F
      CB 0 Top Left Exhaust Sensor   OK         64 degrees C / 147 degrees F
      CB 0 CPU Core-0 Temp           OK         49 degrees C / 120 degrees F
      CB 0 CPU Core-1 Temp           OK         49 degrees C / 120 degrees F
      CB 0 CPU Core-2 Temp           OK         48 degrees C / 118 degrees F
      CB 0 CPU Core-3 Temp           OK         49 degrees C / 120 degrees F
      CB 0 CPU Core-4 Temp           OK         49 degrees C / 120 degrees F
      CB 0 CPU Core-5 Temp           OK         48 degrees C / 118 degrees F
      CB 0 CPU Core-6 Temp           OK         48 degrees C / 118 degrees F
      CB 0 CPU Core-7 Temp           OK         48 degrees C / 118 degrees F
      FPC 0 EA0_HMC0 Logic die       OK         81 degrees C / 177 degrees F
      FPC 0 EA0_HMC0 DRAM botm       OK         78 degrees C / 172 degrees F
      FPC 0 EA0_HMC1 Logic die       OK         85 degrees C / 185 degrees F
      FPC 0 EA0_HMC1 DRAM botm       OK         82 degrees C / 179 degrees F
      FPC 0 EA0 Chip                 OK         93 degrees C / 199 degrees F
      FPC 0 EA0-XR0 Chip             OK         69 degrees C / 156 degrees F
      FPC 0 EA0-XR1 Chip             OK         73 degrees C / 163 degrees F
Power PEM 0                          ok     
      PEM 1                          OK         49 degrees C / 120 degrees F
Fans  Fan Tray 0 Fan 0               OK         Spinning at normal speed
      Fan Tray 0 Fan 1               OK         Spinning at normal speed
      Fan Tray 1 Fan 0               OK         Spinning at normal speed
      Fan Tray 1 Fan 1               OK         Spinning at normal speed
      Fan Tray 2 Fan 0               OK         Spinning at normal speed
      Fan Tray 2 Fan 1               OK         Spinning at normal speed

See Also

Replacing an MX204 Fan Module

Removing an MX204 Fan Module

Note:

To prevent overheating, install the replacement fan module immediately after removing the existing fan module.

To remove the fan module (see Figure 1):

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Loosen the captive screw on the fan module faceplate (use a number-2 Phillips screwdriver).
  3. Hold and press the latch located on the inside of the fan module to release it from the chassis.
    Warning:

    To prevent injury, keep tools and your fingers away from the fans as you slide the fan module out of the device. The fans might still be spinning.

  4. Place one hand under the fan module to support it, and pull the fan module completely out of the chassis.
Figure 1: Removing the Fan ModuleRemoving the Fan Module

Installing an MX204 Fan Module

To install the fan module (see Figure 2):

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Grasp the fan module by the handle, and place one hand under the fan module for support.
  3. Place the fan module on the respective slot, and carefully push the fan module into the chassis until the socket lock snaps into place and holds it.
  4. Using a number-2 Phillips screwdriver, turn the locking screw on the fan module faceplate until it is tight and secured.
Figure 2: Installing the Fan ModuleInstalling the Fan Module

See Also

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