Contents

8 Replacement procedures· 8-1

Replacing a module· 8-1

Replacing an MPU or a fabric module· 8-1

Replacing an interface module that uses detachable ejector levers· 8-2

Replacing an interface module with ejector levers· 8-4

Replacing an interface subcard· 8-5

Replacing transceiver modules· 8-6

Replacing an optical fiber for a multi-chassis fabric module· 8-8

Replacing a fan tray· 8-8

Replacing a power supply· 8-10

Replacing a power tray· 8-11

Removing the power cords· 8-11

Removing power supplies· 8-12

Replacing the power tray· 8-12

 

8 Replacement procedures

WARNING! ·     When replacing removable components while the router is operating, ensure electricity safety. ·     To avoid bodily injury and device damage, follow the replacement procedure strictly to replace a component. ·     Long-time exposure to strong air flow might cause discomfort. To avoid this hazard, do not stand close to the air outlet vents while the router is operating. If you must be next to the router on the air outlet vent side for an extended period, avoid the air flow or take other protective measures.

 

CAUTION: Before discarding a component, delete data from the storage media such as CF cards, SSDs, drives, and flash memories if the component has such media. To delete data from a medium, you can format or physically destroy the storage medium.

 

The router uses a modular architecture, and supports removable components. You can replace a removable component when the router is operating.

Replacing a module

CAUTION: If you are not to install a new module in a slot after removing the old one, install a filler panel in the slot for adequate heat dissipation and dust prevention.

 

Unless otherwise stated, MPUs, interface modules, interface subcards, and fabric modules are collectively referred to as "modules" in this document.

Replacing an MPU or a fabric module

CAUTION: Before replacing a fabric module, press the OFL button on the module. The RUN LED will flash red  at 8 Hz for 3 seconds. After the RUN LED is off, you can remove the module.

 

The replacement procedure is similar for MPUs and fabric modules.

To replace an MPU or a fabric module:

1.     Remove the cables from the MPU or fabric module.

2.     Prepare an antistatic mat to place the removed MPU or fabric module.

3.     Wear an ESD wrist strap. Make sure the wrist strap makes good skin contact and is reliably grounded.

4.     Use a Phillips screwdriver to loosen the captive screws on the MPU or fabric module.

5.     Open the ejector levers on the module and then pull the module part way out of the slot.

6.     Supporting the module bottom with the left hand, slowly pull the module out of the slot along the guide rails with the right hand.

7.     Place the removed module on the antistatic mat.

8.     Install a new MPU or fabric module. For the installation procedure, see "Installing MPUs" or "Installing fabric modules."

Figure8-1 Removing an MPU

 

Replacing an interface module that uses detachable ejector levers

	CAUTION: ·     Put the detachable ejector lever back to its holder after use and then attach them to the chassis or cabinet for future use. ·     The ejector lever holder is magnetic. Beware of electromagnetic interference. ·     Do not use only one detachable ejector lever to install or remove an interface module. ·     Do not hold detachable ejector levers to lift an interface module.

 

To replace an interface module that uses detachable ejector levers:

1.     Remove the cables from the interface module.

2.     Prepare an antistatic mat to place the removed interface module.

3.     Wear an ESD wrist strap. Make sure the wrist strap makes good skin contact and is reliably grounded.

4.     Use a Phillips screwdriver to loosen the captive screws on the interface module.

5.     Attach the ejector lever holders to the cabinet or chassis and then remove the ejector levers from the holders.

6.     Identify the "L" and "R" marks on the ejector levers and attach them to left and right ejector lever retainers of the interface module, respectively, with the lettering on the ejector levers facing upward. See callout 1 in Figure8-2.

7.     Open the ejector levers on the interface module and then pull the interface module part way out of the slot, as shown by callout 2 in Figure8-2.

Figure8-2 Opening a detachable ejector lever

 

8.     Detach the ejector levers from the interface module and then attach the ejector levers to the ejector lever holder.

Keep the ejector levers secure for future use.

9.     Supporting the interface module bottom with one hand, slowly pull the interface module out of the slot along the guide rails with the other hand.

10.     Place the removed interface module on the antistatic mat.

11.     Install a new interface module. For the installation procedure, see "Installing an interface module that uses detachable ejector levers."

Figure8-3 Removing an interface module

 

Replacing an interface module with ejector levers

1.     Remove the cables from the interface module.

2.     Prepare an antistatic mat to place the removed interface module.

3.     Wear an ESD wrist strap. Make sure the wrist strap makes good skin contact and is reliably grounded.

4.     Pivot down the ejector levers and then use a Phillips screwdriver to loosen the captive screws on the interface module.

5.     Fully open the ejector levers on the interface module and then pull the interface module part way out of the slot.

6.     Supporting the interface module bottom with one hand, slowly pull the interface module out of the slot along the guide rails with the other hand.

7.     Place the removed interface module on the antistatic mat.

8.     Install a new interface module in the slot. For the installation procedure, see "Installing an interface module with ejector levers."

Figure8-4 Removing an interface module with ejector levers

 

Replacing an interface subcard

IMPORTANT: ·     If you are not to install a new interface subcard after removing the old one, install a filler panel in the slot. ·     When installing a filler panel, orient it with the blade of the screwdriver image on it facing upwards. First insert the filler panel right side into the slot, and then push the left side into the slot.

 

1.     Remove the cables from the interface subcard.

2.     Prepare an antistatic mat to place the removed interface subcard.

3.     Wear an ESD wrist strap. Make sure the wrist strap makes good skin contact and is reliably grounded.

4.     Use a Phillips screwdriver to loosen the captive screws on the interface subcard.

5.     Open the ejector levers on the interface subcard and then pull the interface subcard part way out of the slot.

6.     Supporting the interface subcard bottom with the left hand, slowly pull the interface subcard out of the slot along the guide rails with the right hand.

7.     Place the removed interface subcard on the antistatic mat.

8.     Install a new interface subcard. For the installation procedure, see "Installing interface subcards."

Figure8-5 Removing an interface subcard

 

Replacing transceiver modules

	WARNING! Disconnected optical fibers or transceiver modules might emit invisible laser light. Do not stare into beams or view directly with optical instruments when the router is operating.

 

	CAUTION: ·     Do not touch the golden plating on a transceiver module. ·     Make sure the transceiver modules at the two ends of an optical fiber are the same model.

 

To replace a transceiver module and optical fiber:

1.     Wear an ESD wrist strap. Make sure the wrist strap makes good skin contact and is reliably grounded.

2.     Remove the optical fibers from the transceiver module.

¡     To remove the optical fibers with an LC connector, press the clip on the connector to pull the LC connector out of the port, as shown in Figure8-6.

¡     To remove the optical fiber with an MPO connector, hold the front end of the MPO connector to pull it out of the port, as shown in Figure8-7.

3.     Pull down the bail latch on the module to the horizontal position (skip this step for QSFP+/QSFP28 transceiver modules with a plastic bail latch). Hold the bail latch to pull the module horizontally and slowly out of the port.

If the interface module is densely populated with transceiver modules, use tweezers to pull the module out.

4.     Insert the dust plugs into the transceiver module and put it into its original packing materials.

5.     Install a new transceiver module in the port. For the installation procedure, see "Installing transceiver modules and optical fibers."

If you are not to install a new transceiver module in the port, insert a dust plug (provided with the interface module) into the port, to prevent particles from entering the port.

Figure8-6 Removing a transceiver module (LC port)

 

Figure8-7 Removing a transceiver module (MPO port)

 

Replacing an optical fiber for a multi-chassis fabric module

1.     Wear an ESD wrist strap. Make sure the wrist strap makes good skin contact and is reliably grounded.

2.     Hold the front end of the MTP connector and remove the optical fiber from the fiber port.

3.     Connect a new optical fiber. For the connection procedure, see "Connecting an optical fiber to a multi-chassis fabric module."

If you are not to install a new optical fiber in the fiber port, insert the dust plug into the port.

Figure8-8 Removing an optical fiber with an MTP connector

 

Replacing a fan tray

	WARNING! The fan trays are hot swappable. Ensure electricity safety when you hot swap a fan tray.

 

CAUTION: ·     The router provides 33 fan tray slots. For good cooling performance, install fan trays in all fan tray slots. ·     The router uses N+1 fan tray redundancy. When a fan tray fails, the router can dissipate heat normally. However, replace the faulty fan tray immediately as a best practice. Keep the faulty fan tray in the chassis until a new fan tray is ready to be installed. ·     Before powering on the router, make sure all fan tray slots are installed with fan trays correctly. ·     The fan trays in the top four rows (FAN 1 to FAN 12), in the middle three rows (FAN 13 to FAN 21), and in the bottom four rows (FAN 22 to FAN 33) power up after a three-second delay, two-second delay, and four-second delay, respectively upon power-up of the router. Before a fan tray powers up, its OK/FAIL LED is red.

 

To replace a fan tray:

1.     Prepare an antistatic mat to place the removed fan tray.

2.     Wear an ESD wrist strap. Make sure the wrist strap makes good skin contact and is reliably grounded.

3.     Hold the fan tray handle and press the red part on the handle to pull the fan tray slowly out of the slot.

4.     Turn over the fan tray and place it on the antistatic mat, with the bottom clasp facing up.

5.     Install a new fan tray. For the installation procedure, see "Installing fan trays."

Figure8-9 Removing a fan tray

 

Replacing a power supply

WARNING! ·     Provide a circuit breaker for each power supply. Before replacing a power supply, turn off the circuit breaker for it. After the circuit breaker for a power supply is turned off, the IN and OUT LEDs on the power supply stay red. You can remove the power supply. After you move the power supply from the router, the INPUT OK LED and OUTPUT OK LED turn off. ·     To avoid bodily injury, do not touch the spinning fan in a power supply when replacing the power supply. ·     The power supply may be of high temperature. Allow it to cool before touching it.

 

CAUTION: Before replacing a power supply, make sure the remaining power supplies can support the normal operation of the router.

 

The replacement procedures for the power supplies are the same. The following replaces a PSR3000B-54AHD power supply.

To replace a power supply:

1.     Prepare an antistatic mat to place the removed power supply.

2.     Turn off the circuit breaker.

3.     Wear an ESD wrist strap. Make sure the wrist strap makes good skin contact and is reliably grounded.

4.     Remove the air filter. As shown in Figure8-10, press the locking tabs at both sides of the air filter to remove the air filter from the top hood.

Figure8-10 Removing the air filter

 

5.     Press down the latch on the power supply and pull the power supply slowly out of the slot along the guide rails, as shown in Figure8-11.

Figure8-11 Removing a power supply

 

6.     Place the removed power supply on the antistatic mat.

7.     Install a new power supply. For the installation procedure, see "Installing power supplies."

8.     Reinstall the air filter. For the installation procedure, see "Installing the top hood and air filter."

Replacing a power tray

To avoid device damage and bodily injury, strictly follow the procedures shown in Figure8-12 to replace a power tray.

Figure8-12 Power tray replacement procedure

 

Removing the power cords

Removing AC power cords

1.     Remove the cable clamp from an AC power cord and then remove the power cord from the power tray, as shown in Figure8-13.

Keep the removed AC power cord secure.

2.     Remove all the other AC power cords connected to the power tray.

Figure8-13 Removing an AC power cord

 

Removing DC power cords

1.     Use a screwdriver to loosen the captive screws on the terminal block cover to remove the cover.

2.     Use a screwdriver to remove the screws that secure a DC power cord to the terminal block and then remove the DC power cord from the terminal block.

Keep the removed DC power cord secure.

3.     Remove all other DC power cords from the terminal block.

Figure8-14 Removing a DC power cord

 

Removing power supplies

Remove all the power supplies in the power tray. For information about removing a power supply, see "Replacing a power supply."

Replacing the power tray

1.     Remove the top hood, as shown in Figure8-15.

Figure8-15 Removing the top hood

 

2.     Use a Phillips screwdriver to remove the screws at two sides of the power tray.

Keep the removed screws secure.

3.     Simultaneously open the ejector levers of the power tray and then pull the power tray part way out of the slot.

4.     Holding the front side of the power tray with one hand and supporting the power tray bottom with the other hand, pull the power tray out of the slot, as shown in Figure8-16.

Figure8-16 Removing a power tray

 

5.     Open the ejector levers on the new power tray and slide the power tray into the slot along the guide rails.

6.     Close the ejector levers after the brakes on its ejector levers touch the slot edges tightly.

Figure8-17 Install a new power tray

 

7.     Use a Phillips screwdriver to fasten the screws at two sides of the power tray, as shown in Figure8-18.

Figure8-18 Securing the new power tray