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play_arrow Fast Track: Initial Installation
- Fast Track to Rack Installation and Power
- Onboard, Configure, and Monitor MX304
play_arrow Overview
play_arrow Site Planning, Preparation, and Specifications
play_arrow Initial Installation and Configuration
play_arrow Maintaining Components
play_arrow Contacting Customer Support and Returning the Chassis or Components
- Contact Customer Support and Returning the Chassis or Components
play_arrow Safety and Compliance Information

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English

Maintain MX304 Cooling System Components

date_range 11-Sep-24

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Purpose

For optimum cooling, verify the condition of the air filter.

Action

Regularly inspect the air filter. A dirty air filter restricts airflow in the unit which negatively affects the router ventilation, The filter degrades over time. You must replace it every 6 months.

CAUTION:
Always keep the air filter in place while the device is operating, except during replacement. The fans are very powerful and can pull small bits of wire or other materials into the device if the air filter isn't in place. These materials can damage device components.
The shelf life of polyurethane filter varies from two years to five years depending on the storage conditions. Store in a cool, dry, and dark environment. Wrap the media in plastic and store in an environment with relative humidity between 40%- 80% and temperature between 40°F (4°C) to 90°F (32° C). Note that if the material flakes, or becomes brittle when rubbed or deformed, it is no longer usable.

Replace the MX304 Air Filter Unit

The air filter unit has three parts. The air filter sits right inside the outer filter cover and the inner cage. The air filter unit is installed into the cable management brackets, and is held tightly by captive screws.

Remove the MX304 Air Filter Unit
Install the MX304 Air Filter Unit

Remove the MX304 Air Filter Unit

Note:

The air filter unit is designed to prevent dust from being drawn into the chassis.

To remove the air filter unit from the front of the router:

Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
Loosen the captive screws on both sides of the air filter unit.

Note:
You don't need to remove the cables from the cable manager to access the air filter.
Grasp the air filter unit and gently pull it out of the cable management brackets. See Figure 1.
Figure 1: Remove the Air Filter from the Chassis

Install the MX304 Air Filter Unit

Note:

The air filter unit is installed on the cable management brackets. Before installing the air filter unit, ensure that the cable management brackets are already installed on the front of the router.

To install the air filter unit:

Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
With the air filter unit right side up, slide it into the rails on the cable management brackets until it stops (see Figure 2). The air filter unit fits snugly on the cable management brackets.
Figure 2: Install the Air Filter
Tighten the captive screws to secure the air filter unit to the cable management brackets.

Replace the MX304 Air Filter

Note:

Regularly inspect the air filter. A dirty air filter restricts airflow in the unit, producing a negative effect on the ventilation of the chassis.

Remove the MX304 Air Filter
Install the MX304 Air Filter

Remove the MX304 Air Filter

CAUTION:

Always keep the air filter unit in place while the router is operating, except during replacement. Because the fans are very powerful, they could pull small bits of wire or other materials into the router through the unfiltered air intake. This could damage the router components.

To remove the air filter:

Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
On the front of the router, loosen the captive screws on each side of the air filter unit.

Note:
You don't need to remove the cables from the cable manager to access the air filter.
Remove the outer air filter cover by grasping the head of the loosened screws, and pulling it out..
The air filter is located at the center of the air filter unit, and just behind the outer filter cover. See Figure 3.
Pull the air filter straight out from the air filter unit.
Figure 3: Remove the Air Filter from the Air Filter Unit

  1
—
Outer filter cover
  3
—
Inner filter cage
  2
—
Air filter

Install the MX304 Air Filter

Note:

The air filter unit is installed on the cable management brackets. Before installing the air filter unit, ensure that the cable management brackets are already installed on the front of the router.

To install the air filter:

Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
On the front of the router, loosen the captive screws on each side of the air filter unit .

Note:
You don't need to remove the cables from the cable manager to access the air filter.

CAUTION:
Do not run the router for more than two minutes without the air filter unit in place.
Grasp the head of the loosened screws, and pull out the outer air filter cover.
The air filter is at the center of the air filter unit, just behind the outer filter cover. See Figure 4.
Slide the air filter straight onto inner filter cage.
Figure 4: Install the Air Filter from the Air Filter Unit

  1
—
Outer filter cover
  3
—
Inner filter cage
  2
—
Air filter
Place the outer air filter cover back into it’s place, and tighten the captive screws to secure the air filter unit.

Maintain the MX304 Fan Module

Purpose
Action

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
      Routing Engine 0 CPU           OK         38 degrees C / 100 degrees F
      RE 0 CPU Core-0 Temp           OK         38 degrees C / 100 degrees F
      RE 0 CPU Core-1 Temp           OK         37 degrees C / 98 degrees F
      RE 0 CPU Core-2 Temp           OK         36 degrees C / 96 degrees F
      RE 0 CPU Core-3 Temp           OK         36 degrees C / 96 degrees F
      RE 0 CPU Core-4 Temp           OK         34 degrees C / 93 degrees F
      RE 0 CPU Core-5 Temp           OK         38 degrees C / 100 degrees F
      RE 0 CPU Core-6 Temp           OK         34 degrees C / 93 degrees F
      RE 0 CPU Core-7 Temp           OK         37 degrees C / 98 degrees F
      RE 0 Exhaust_right             OK         34 degrees C / 93 degrees F
      RE 0 Inlet_Left                OK         26 degrees C / 78 degrees F
      RE 0 Exhaust_Left              OK         32 degrees C / 89 degrees F
      RE 0 Inlet_right               OK         29 degrees C / 84 degrees F
Temp  CB 0 Exhaust_A                 OK         41 degrees C / 105 degrees F
      CB 0 Exhaust_B                 OK         40 degrees C / 104 degrees F
      CB 0 Exhaust_C                 OK         37 degrees C / 98 degrees F
      CB 0 Intake_A                  OK         45 degrees C / 113 degrees F
      CB 0 Intake_B                  OK         35 degrees C / 95 degrees F
      CB 0 Onboard                   OK         37 degrees C / 98 degrees F
      CB 0 PEX Die                   OK         29 degrees C / 84 degrees F
      FPC 0 PMB_CPU                  OK         28 degrees C / 82 degrees F
      FPC 0 PMB_DIMM-0               OK         36 degrees C / 96 degrees F
      FPC 0 PMB_DIMM-1               OK         41 degrees C / 105 degrees F
      FPC 0 YT0-therm_sensor         OK         60 degrees C / 140 degrees F
      FPC 0 YT1-therm_sensor         OK         66 degrees C / 150 degrees F
      FPC 0 YT2-therm_sensor         OK         70 degrees C / 158 degrees F
      FPC 0 YT0-test_macro           OK         61 degrees C / 141 degrees F
      FPC 0 YT1-test_macro           OK         67 degrees C / 152 degrees F
      FPC 0 YT2-test_macro           OK         71 degrees C / 159 degrees F
      FPC 0 YT0-pgio_slice0          OK         65 degrees C / 149 degrees F
      FPC 0 YT1-pgio_slice0          OK         77 degrees C / 170 degrees F
      FPC 0 YT2-pgio_slice0          OK         74 degrees C / 165 degrees F
      FPC 0 YT0-core_pll             OK         60 degrees C / 140 degrees F
      FPC 0 YT1-core_pll             OK         66 degrees C / 150 degrees F
      FPC 0 YT2-core_pll             OK         70 degrees C / 158 degrees F
      FPC 0 YT0-fabio_slice0         OK         63 degrees C / 145 degrees F
      FPC 0 YT1-fabio_slice0         OK         64 degrees C / 147 degrees F
      FPC 0 YT2-fabio_slice0         OK         71 degrees C / 159 degrees F
      FPC 0 YT0-pgio_slice1          OK         66 degrees C / 150 degrees F
      FPC 0 YT1-pgio_slice1          OK         70 degrees C / 158 degrees F
      FPC 0 YT2-pgio_slice1          OK         76 degrees C / 168 degrees F
      FPC 0 YT0-fabio_slice1         OK         63 degrees C / 145 degrees F
      FPC 0 YT1-fabio_slice1         OK         63 degrees C / 145 degrees F
      FPC 0 YT2-fabio_slice1         OK         72 degrees C / 161 degrees F
      FPC 0 YT0-hbmio_slice1         OK         61 degrees C / 141 degrees F
      FPC 0 YT1-hbmio_slice1         OK         62 degrees C / 143 degrees F
      FPC 0 YT2-hbmio_slice1         OK         70 degrees C / 158 degrees F
      FPC 0 YT0-wanio_misc           OK         62 degrees C / 143 degrees F
      FPC 0 YT1-wanio_misc           OK         66 degrees C / 150 degrees F
      FPC 0 YT2-wanio_misc           OK         71 degrees C / 159 degrees F
      FPC 0 YT0-HBM0                 OK         55 degrees C / 131 degrees F
      FPC 0 YT1-HBM0                 OK         56 degrees C / 132 degrees F
      FPC 0 YT2-HBM0                 OK         60 degrees C / 140 degrees F
      FPC 0 YT0-HBM1                 OK         56 degrees C / 132 degrees F
      FPC 0 YT1-HBM1                 OK         56 degrees C / 132 degrees F
      FPC 0 YT2-HBM1                 OK         62 degrees C / 143 degrees F
      FPC 0 WAN RT0.0                OK         85 degrees C / 185 degrees F
      FPC 0 WAN RT1.0                OK         89 degrees C / 192 degrees F
      FPC 0 WAN RT2.0                OK         85 degrees C / 185 degrees F
      FPC 0 WAN RT3.0                OK         87 degrees C / 188 degrees F
      FPC 0 WAN RT4.0                OK         85 degrees C / 185 degrees F
      FPC 0 WAN RT5.0                OK         86 degrees C / 186 degrees F
      FPC 0 WAN RT6.0                OK         88 degrees C / 190 degrees F
      FPC 0 WAN RT7.0                OK         90 degrees C / 194 degrees F
      FPC 0 WAN RT8.0                OK         87 degrees C / 188 degrees F
      FPC 0 WAN RT9.0                OK         91 degrees C / 195 degrees F
      FPC 0 WAN RT10.0               OK         86 degrees C / 186 degrees F
      FPC 0 WAN RT11.0               OK         87 degrees C / 188 degrees F
      FPC 0 WAN RT12.0               OK         95 degrees C / 203 degrees F
      FPC 0 WAN RT13.0               OK         95 degrees C / 203 degrees F
      FPC 0 WAN RT14.0               OK         93 degrees C / 199 degrees F
      FPC 0 WAN RT15.0               OK         96 degrees C / 204 degrees F
      FPC 0 WAN RT16.0               OK         96 degrees C / 204 degrees F
      FPC 0 WAN RT17.0               OK         94 degrees C / 201 degrees F
      FPC 0 PIC0-Intake-A Temp Sensor OK        50 degrees C / 122 degrees F
      FPC 0 PIC0-Intake-B Temp Sensor OK        51 degrees C / 123 degrees F
      FPC 0 PIC0-Exhaust Temp Sensor OK         44 degrees C / 111 degrees F
      FPC 0 PIC0-YT Junction Temp Sensor OK     66 degrees C / 150 degrees F
      FPC 0 PIC0-MAX20754_YT_VDD0V75_T OK       57 degrees C / 134 degrees F
      FPC 0 PIC0-MAX20743_YT_HBM_VDDQ1V2_T OK   57 degrees C / 134 degrees F
      FPC 0 PIC0-MAX20743_YT_HBM_VDDC1V2_T OK   58 degrees C / 136 degrees F
      FPC 0 PIC0-MAX20743_YT_RTVDD0V75_T OK     63 degrees C / 145 degrees F
      FPC 0 PIC0-MAX20796_WAN_VDD0V8_A_T OK     101 degrees C / 213 degrees F
      FPC 0 PIC0-MAX20743_WAN_VDD3V3_A_T OK     71 degrees C / 159 degrees F
      FPC 0 PIC0-MAX20743_WAN_AVDD1V2_A_T OK    70 degrees C / 158 degrees F
      FPC 0 PIC0-MAX20796_WAN_VDD0V8_B_T OK     73 degrees C / 163 degrees F
      FPC 0 PIC0-MAX20743_WAN_VDD3V3_B_T OK     101 degrees C / 213 degrees F
      FPC 0 PIC0-MAX20743_WAN_AVDD1V2_B_T OK    73 degrees C / 163 degrees F
      FPC 0 PIC0-MAX16545_VDD12V0_T  Absent     46 degrees C / 114 degrees F
      FPC 0 PIC1-Intake-A Temp Sensor OK        49 degrees C / 120 degrees F
      FPC 0 PIC1-Intake-B Temp Sensor OK        48 degrees C / 118 degrees F
      FPC 0 PIC1-Exhaust Temp Sensor OK         39 degrees C / 102 degrees F
      FPC 0 PIC1-YT Junction Temp Sensor OK     69 degrees C / 156 degrees F
      FPC 0 PIC1-MAX20754_YT_VDD0V75_T OK       57 degrees C / 134 degrees F
      FPC 0 PIC1-MAX20743_YT_HBM_VDDQ1V2_T OK   54 degrees C / 129 degrees F
      FPC 0 PIC1-MAX20743_YT_HBM_VDDC1V2_T OK   53 degrees C / 127 degrees F
      FPC 0 PIC1-MAX20743_YT_RTVDD0V75_T OK     59 degrees C / 138 degrees F
      FPC 0 PIC1-MAX20796_WAN_VDD0V8_A_T OK     94 degrees C / 201 degrees F
      FPC 0 PIC1-MAX20743_WAN_VDD3V3_A_T OK     65 degrees C / 149 degrees F
      FPC 0 PIC1-MAX20743_WAN_AVDD1V2_A_T OK    70 degrees C / 158 degrees F
      FPC 0 PIC1-MAX20796_WAN_VDD0V8_B_T OK     68 degrees C / 154 degrees F
      FPC 0 PIC1-MAX20743_WAN_VDD3V3_B_T OK     100 degrees C / 212 degrees F
      FPC 0 PIC1-MAX20743_WAN_AVDD1V2_B_T OK    76 degrees C / 168 degrees F
      FPC 0 PIC1-MAX16545_VDD12V0_T  OK         46 degrees C / 114 degrees F
      FPC 0 PIC2-Intake-A Temp Sensor OK        54 degrees C / 129 degrees F
      FPC 0 PIC2-Intake-B Temp Sensor OK        50 degrees C / 122 degrees F
      FPC 0 PIC2-Exhaust Temp Sensor OK         39 degrees C / 102 degrees F
      FPC 0 PIC2-YT Junction Temp Sensor OK     71 degrees C / 159 degrees F
      FPC 0 PIC2-MAX20754_YT_VDD0V75_T OK       60 degrees C / 140 degrees F
      FPC 0 PIC2-MAX20743_YT_HBM_VDDQ1V2_T OK   63 degrees C / 145 degrees F
      FPC 0 PIC2-MAX20743_YT_HBM_VDDC1V2_T OK   65 degrees C / 149 degrees F
      FPC 0 PIC2-MAX20743_YT_RTVDD0V75_T OK     65 degrees C / 149 degrees F
      FPC 0 PIC2-MAX20796_WAN_VDD0V8_A_T OK     108 degrees C / 226 degrees F
      FPC 0 PIC2-MAX20743_WAN_VDD3V3_A_T OK     83 degrees C / 181 degrees F
      FPC 0 PIC2-MAX20743_WAN_AVDD1V2_A_T OK    76 degrees C / 168 degrees F
      FPC 0 PIC2-MAX20796_WAN_VDD0V8_B_T OK     69 degrees C / 156 degrees F
      FPC 0 PIC2-MAX20743_WAN_VDD3V3_B_T OK     103 degrees C / 217 degrees F
      FPC 0 PIC2-MAX20743_WAN_AVDD1V2_B_T OK    79 degrees C / 174 degrees F
      FPC 0 PIC2-MAX16545_VDD12V0_T  OK         51 degrees C / 123 degrees F
      SFB Exhaust_A                  OK         44 degrees C / 111 degrees F
      SFB Exhaust_B                  OK         44 degrees C / 111 degrees F
      SFB Intake_A                   OK         33 degrees C / 91 degrees F
      SFB Intake_B                   OK         42 degrees C / 107 degrees F
      SFB Middle Inlet               OK         41 degrees C / 105 degrees F
      SFB ZF Temp                    OK         59 degrees C / 138 degrees F
Power PEM 0                          OK         28 degrees C / 82 degrees F
      PEM 1                          Absent    
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

Replace an MX304 Fan Module

Remove an MX304 Fan Module
Install an MX304 Fan Module

Remove an MX304 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 5):

Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
Loosen the captive screw on the fan module faceplate (use a number-2 Phillips screwdriver).
Hold and press the latches located on the sides of the fan module (see Figure 5) 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.
Place one hand under the fan module to support it, and then pull the fan module completely out of the chassis.

Figure 5: Remove the Fan Module

Install an MX304 Fan Module

To install the fan module (see Figure 6):

Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
Grasp the fan module by the handle, and place one hand under the fan module for support.
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.
Using a number-2 Phillips screwdriver, turn the locking screw on the fan module faceplate until it is tight and secured.

Figure 6: Install the Fan Module

arrow_backward PREVIOUS Routine Maintenance Procedures for MX304 Routers

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MX304 Universal Routing Platform Hardware Guide

ON THIS PAGE

Maintain MX304 Cooling System Components

Maintain the MX304 Air Filter

Purpose

Action

Replace the MX304 Air Filter Unit

Remove the MX304 Air Filter Unit

Install the MX304 Air Filter Unit

Replace the MX304 Air Filter

Remove the MX304 Air Filter

Install the MX304 Air Filter

Maintain the MX304 Fan Module

Purpose

Action

Replace an MX304 Fan Module

Remove an MX304 Fan Module

Install an MX304 Fan Module

Stay in touch

1 — Outer filter cover	3 — Inner filter cage
2 — Air filter

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