Replacing Modules

Replacing the Uplink Module

You must shut down the switch before replacing the M6PQ, M6PQ-E, or M12PQ uplink module.

Procedure

Step 1

Power off the switch by removing the power cables from both of the power supplies installed in the switch.

Step 2

Verify that both LEDs on each power supply are off and that all of the other switch LEDs are off.

If any LEDs are on, look for a power supply that is still powered on and remove its power cable.

Step 3

Remove the cables from each of the ports on the uplink module. Be sure to label each cable for future refernce.

Step 4

Unscrew both captive screws on the front of the module.

Step 5

Holding both handles on the front of the module, slide the module out of the slot.

Caution

 
To prevent electrostatic discharge (ESD) damage to the module electronics, do not touch the electrical connectors on the back side of the module. Also, to prevent any damage to the electrical connectors, prevent them touching anything that can bend or break them.

Step 6

Place the module on an antistatic surface or inside an antistatic bag. If possible, repack the module in its shipping materials for safe shipping or storage.

Step 7

Remove the replacement module from its packing materials and place it on an antistatic surface.

Hold the module by its two handles and do not touch the electrical connectors on its backside. Also, to protect the electrical connectors, avoid letting them come in contact with anything other than the electrical connectors inside the chassis.

Step 8

Holding the replacement module by its two handles, position the module with the electrical components on its backside facing the open uplink-module slot.

Step 9

Slide the module all the way into the chassis until its front side comes in contact with the chassis. For the last 0.2 inches (0.5 cm),carefully mount the module onto the chassis connectors by pushing more firmly, but do not force the module if it does not move further (excessive force can damage the connectors).

Note

 

If you are not able to push the module all the way into the slot, carefully slide the module out of the slot and check its electrical connectors for damage. If damaged, contact Cisco Technical Assistance for help. If undamaged, repeat Step 6 to reinstall the module.

Step 10

Screw in both captive screws on the front of the module to secure the module to the chassis. Tighten each screw to 8 in-lb (0.9 N·m).

Step 11

Verify that the Status (STS) LED turns on and becomes amber.

Step 12

Reconnect each of the APIC-connection cables and verify that the LED for each port becomes green.

Under each set of two uplink ports, there is an Active (ACT) LED that indicates whether the ports are active for this switch. Connect cables to only the active ports.

Replacing a Fan Module During Operations

There must always be at least one fan module installed in the chassis to maintain the designed airflow. You can remove one fan module temporarily to replace it with another fan module within two minutes to avoid a shutdown, but if the replacement fan module is not available, leave the original fan module in the chassis.

All fan and power supply modules must have the same airflow direction or else an error can occur with the switch overheating and shutting down. You can determine the airflow direction of a fan module by the color of the stripe on the front of the module. If the fan module has a blue stripe for port-side exhaust airflow, the power supplies must have blue or gray coloring for the same airflow direction. If the fan module has a burgundy stripe for port-side intake airflow, the power supplies must have burgundy or green coloring for the same airflow direction. To avoid over heating the switch, make sure that the fan modules are positioned in one of the following ways:

  • For port-side exhaust airflow with blue coloring, position the fan modules in a cold aisle.

  • For port-side intake airflow with burgundy coloring, position the ports in a cold aisle.

Before you begin

Before you can replace a fan module, ensure that the following conditions exist:

  • There are two functioning fan modules in the other fan slots. In order to replace a fan module during operations, there must be two fan modules circulating air in the chassis at all times. The other fan module is redundant and can be replaced.

  • The replacement fan module must have the same airflow direction as the other modules in the chassis.

If you must replace the fan module during operations and the above conditions are not met, leave the fan module that you need to replace in the chassis to preserve the designed airflow until you have the required module.

Procedure

Step 1

Remove the fan module that you need to replace as follows:

  1. Verify that the fan modules that you are not replacing each have a lit Status (STS) LED (see the following figure for the location of the LED). If you are replacing a fan module during operations, the other two fan modules must be operating.

    Note

     

    If you are replacing the fan module while the chassis is not operating, you can skip this step.


    Installation Features on the Fan Tray

    1

    Captive screw

    4

    Colored stripe specifying the airflow direction (burgundy for the port-side intake direction or blue for the port-side exhaust direction)

    2

    Status (STS) LED

    5

    Electrical connectors on the backside.

    3

    Handle

  2. Pull the fan module handle to slide the module out of the chassis.

    Caution

     

    To prevent electrostatic discharge (ESD) damage to the module electronics, do not touch the electrical connectors on the back side of the module. Also, to prevent any damage to the electrical connectors, prevent them touching anything that can bend or break them.

  3. Place the removed module on an antistatic surface or in an antistatic bag. If possible, repack the module in its packing materials for safe shipping or storage.

Step 2

Follow these steps to replace the missing fan module within two minutes to avoid a shutdown.

  1. Remove the replacement fan module from its packing materials and place it on an antistatic surface.

    Hold the module by its handle and do not touch the electrical connectors on its backside. Also, to protect the electrical connectors, avoid letting them come in contact with anything other than the electrical connectors inside the chassis.

  2. Verify that you have the right fan module for the chassis. The correct fan module has one of the following part numbers:

    • N9K-C9300-FAN2-B (port-side exhaust airflow direction and a blue stripe)

    • N9K-C9300-FAN2 (port-side intake airflow direction and a burgundy stripe)

    Note

     

    Be sure that the airflow direction of the new fan module matches the airflow direction of the other fan and AC power supply modules already installed in the chassis. Port-side intake airflow is indicated with burgundy or green coloring, and port-side exhaust airflow is indicated with blue or gray coloring.

  3. Position the fan module in front of the open fan slot (be sure that the backside of the module with the electrical connectors is positioned to enter the slot first) and slide the module all the way into the chassis until its front side comes in contact with the chassis. For the last 0.2 inches (0.5 cm), carefully mount the module onto the chassis connectors by pushing more firmly, but do not force the module if it does not move further (excessive force can damage the connectors).

    Note

     

    If you are not able to push the module all the way into the slot, carefully slide the module out of the slot and check its electrical connectors for damage. If damaged, contact Cisco Technical Assistance for help. If undamaged, repeat this step to reinstall the module.

  4. Verify that the STS LED turns on and becomes green.

    If the STS LED does not turn on, slide the module out of the chassis, and visually check the electrical connectors on the back side of the chassis for damage. If damaged, contact Cisco Technical Assistance for help. If undamaged, repeat the previous step to reinstall the module.

  5. Secure the fan module to the chassis by screwing in the captive screw to the chassis. Tighten the screw to 5 to 7 in-lb (0.56 to 0.79 N·m).

Replacing a Power Supply Module

The switch requires two power supplies for redundancy. With one power supply providing the necessary power for operations, you can replace the other power supply during operations so long as the new power supply has the same airflow direction as the other modules in the chassis.

You can replace a power supply with another supported power supply that has the same power source type as the other installed power supply. Additionally, the airflow direction of the power supply must match or conform to the airflow direction of the installed fan modules. For the airflow direction used by the switch, see the coloring of the fan modules.

Removing an AC Power Supply

To remove an AC power supply, you must first disconnect the power cable and then remove the module from the chassis.

Before you begin

  • To replace a power supply during operations, you must have a functioning power supply providing power to the switch while you replace the other power supply. If there is only one power supply installed in the switch and you need to replace it, install the new power supply in the open slot and power it up before removing the original power supply.

  • Ensure that the chassis is grounded. For grounding instructions, see Grounding the Chassis.

Procedure

Step 1

Pull the power cord out from the power receptacle on the power supply to be removed and verify that the LED turns off.

Note

 

The LED might be on and amber colored to indicate that the input power has been disconnected.

Step 2

Remove the power supply from the chassis by pushing and holding its thumb latch to the left and pulling the power supply part way out of the chassis.

Step 3

Place your other hand under the power supply to support it while you slide it out of the chassis.

Either place the power supply on an antistatic surface or pack it in its packing materials.

Step 4

If the power supply slot is to remain empty, install a blank power supply filler panel (part number N2200-P-BLNK).

What to do next

You are ready to install the replacement power supply.

Removing a DC Power Supply

You can remove one power supply while the other one provides power to the switch.

To disconnect the power supply from its power cables, you must shut off the power from the power source and then disconnect the connector for the power cables.

Procedure

Step 1

Turn off the circuit breaker for the power feed to the power supply that you are replacing.

Be sure that the LEDs turn off on the power supply that you are removing.

Step 2

Remove the power cable from the power supply by doing the following:

    Step 3

    Grasp the power supply handle while pressing the release latch towards the power supply handle.

    Step 4

    Pull the power supply out of the bay.

    What to do next

    You are ready to install a DC power supply in the open slot.

    Installing an AC Power Supply

    You can replace one power supply while the other one provides power to the switch.

    Before you begin

    • The power supply that you are installing must be capable of using the same airflow direction as the fan trays installed in the same switch and it must use the same type of power source as the other power supply installed in the same switch (do not mix AC and DC power supplies in the same switch).


      Note

      DC power supplies with green coloring have the same port-side intake airflow direction as the power supplies with red coloring, and DC power supplies with gray coloring have the same port-side exhaust airflow direction as the power supplies with blue coloring. If the power supply that you are replacing has a different color handle than the replacement power supply, verify that it has or will have the same airflow direction as the other modules in the switch.

    • An AC power source must be within reach of the power cable that will be used with the replacement power supply. If you are using n+n power redundancy, there must be a separate power source for each power supply installed in the chassis. Otherwise, only one power source is required.

    • There must be an earth ground connection to the chassis that you are installing the replacement module. Typically, the chassis is grounded by its metal-to-metal connection with a grounded rack. If you need to ground the chassis, see Grounding the Chassis.

    Procedure

    Step 1

    Holding the replacement power supply with one hand underneath the module and the other hand holding the handle, turn the power supply so that its release latch is on the right side and align the back end of the power supply (the end with the electrical connections) to the open power supply slot before carefully sliding the power supply all the way into the slot until it clicks into place.

    Note

     

    If the power supply does not fit into the open slot, turn the module over before sliding it carefully into the open slot.

    Step 2

    Test the installation by trying to pull the power supply out of the slot without using the release latch.

    If the power supply does not move out of place, it is secured in the slot. If the power supply moves, carefully press it all the way into the slot until it clicks in place.

    Step 3

    Attach the power cable to the electrical outlet on the front of the power supply.

    Step 4

    Make sure that the other end of the power cable is attached to the appropriate power source for the power supply.

    Note

     

    Depending on the outlet receptacle on your power distribution unit, you might need the optional jumper cable to connect the switch to your outlet receptacle.

    Step 5

    Verify that the power supply is operational by making sure that the power supply LED is green.

    Installing a DC Power Supply

    This topic is for installing the 48-V DC power supply into switch chassis.

    You can replace one power supply while the other one provides power to the switch.

    Before you begin

    • The circuit breaker for the DC power source for the power supply must be turned off.

    • The power supply that you are installing must be capable of using the same airflow direction as the fan trays installed in the same switch

    • A DC power source must be within reach of the power cable that will be used with the replacement power supply. If you are using n+n power redundancy, there must be a separate power source for each power supply installed in the chassis (do not mix AC and DC power sources for the same switch). Otherwise, only one power source is required.

    • There must be an earth ground connection to the chassis that you are installing the replacement module. Typically, the chassis is grounded by its metal-to-metal connection to a grounded rack. If you need to ground this chassis by another means, see Grounding the Chassis.

    • We recommend 8-AWG wire for DC installation in the U.S.

    • All DC power supplies have reverse polarity protection. When you inadvertently connect the input power (+) to the DC PSU’s – terminal and the input power – to the DC PSU’s (+) terminal, the PSU will not be damaged and will operate fine after the input power feeds are correctly wired.

    Procedure

    Step 1

    Holding the replacement power supply with one hand underneath the module and the other hand holding the handle, turn the power supply so that its release latch is on the right side and align the back end of the power supply (the end with the electrical connections) to the open power supply slot before carefully sliding the power supply all the way into the slot until it clicks into place.

    Note

     

    If the power supply does not fit into the open slot, turn the module over before carefully sliding it into the open slot.

    Step 2

    If the DC power cables and a grounding cable are already connected to an electrical connector block, insert the block into the power receptacle on the power supply.

    Step 3

    Turn on the circuit breaker for the DC power source connected to the power supply.

    Step 4

    Verify that the power supply is operational by making sure that the power supply LED is green.

    Wiring a 48 V DC Electrical Connector Block

    You must connect the ground, negative, and positive DC power cables to a connector block in order to connect the power cables to a 48 V DC power supply.


    Note

    The recommended wire gauge is 8 AWG. The minimum wire gauge is 10 AWG.


    Warning

    Statement 342—Before Connecting to System Power Supply

    High touch/leakage current – Permanently connected protective earth ground is essential before connecting to system power supply.


    Warning

    Statement 1024—Ground Conductor

    This equipment must be grounded. To reduce the risk of electric shock, never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available.

    Before you begin

    You must turn off the circuit breaker for the DC power cables that you are connecting to prevent electrocution.

    Procedure

    Step 1

    Verify that the circuit breaker for the power feed to the replacement power supply is turned off.

    Step 2

    Remove the DC power connector block from the power supply by doing the following:

    1. Push the orange plastic button on the top of the connector block inward toward the power supply.

    2. Pull the connector block out of the power supply.

    Step 3

    Strip 0.6 inches (15 mm) of insulation off the DC wires that you are using.

    Step 4

    Orient the connector as shown in the following figure with the orange plastic button on top.

    1

    Wire retainer lever

    4

    -48V (+DC) cable

    2

    Orange plastic button on top of the connector

    5

    Grounding cable (8 AWG recommended)

    3

    -48V (-DC) cable

    Step 5

    Use a small screwdriver to depress the spring-loaded wire retainer lever on the lower spring-cage wire connector. Insert your green (ground) wire into the aperture and then release the lever.

    Step 6

    Use a small screwdriver to depress the spring-loaded wire retainer lever on the upper spring-cage wire connector. Insert your red (DC negative) wire into the aperture and then release the lever.

    Step 7

    Use a small screwdriver to depress the spring-loaded wire retainer lever on the middle spring-cage wire connector. Insert your black (DC positive) wire into the aperture and then release the lever.

    Step 8

    Insert the connector block back into the power supply. Make sure that your black (DC positive) wire aligns with the power supply label, "+ DC".

    Step 9

    Verify that the other ends of the cables are attached to the DC power source and ground. You are then ready to turn on the DC power source.