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Maintaining MX480 Components

 

Routine Maintenance Procedures for the MX480 Router

Purpose

For optimum router performance, perform preventive maintenance procedures.

Action

  • Inspect the installation site for moisture, loose wires or cables, and excessive dust. Make sure that airflow is unobstructed around the router and into the air intake vents.

  • Check the status-reporting devices on the craft interface—System alarms and LEDs.

  • Inspect the air filter at the left rear of the router, replacing it every 6 months for optimum cooling system performance. Do not run the router for more than a few minutes without the air filter in place.

MX480 Field-Replaceable Units (FRUs)

Field-replaceable units (FRUs) are router components that can be replaced at the customer site. Replacing most FRUs requires minimal router downtime. The router uses the following types of FRUs:

  • Hot-removable and hot-insertable FRUs—You can remove and replace these components without powering off the router or disrupting the routing functions.

  • Hot-pluggable FRUs—You can remove and replace these components without powering off the router, but the routing functions of the system are interrupted when the component is removed.

Table 1 lists the FRUs for the MX480 router. Before you replace an SCB or a Routing Engine, you must take the host subsystem offline.

Table 1: Field-Replaceable Units

Hot-Removable and Hot-Insertable FRUs

Hot-Pluggable FRUs

  • Air filter

  • Craft interface

  • Backup Switch Control Board (SCB) (if redundant)

  • Master Switch Control Board (SCB) (if nonstop active routing is configured)

  • Backup Routing Engine (if redundant)

  • Master Routing Engine (if nonstop active routing is configured)

  • Dense Port Concentrators (DPCs)

  • Flexible PIC Concentrators (FPCs)

  • Modular Port Concentrators (MPCs)

  • Modular Interface Cards (MICs)

  • PICs

  • AC and DC power supplies (if redundant)

  • Fan tray

  • Master Switch Control Board (SCB) (if nonstop active routing is not configured)

  • Master Routing Engine (if nonstop active routing is not configured)

  • Switch Control Board (SCB) (nonredundant)

  • Routing Engine (nonredundant)

  • Solid-state drives (SSDs) of Routing Engines

Tools and Parts Required to Replace MX480 Hardware Components

To replace hardware components, you need the tools and parts listed in Table 2.

Table 2: Tools and Parts Required

Tool or Part

Components

2.5-mm flat-blade (–) screwdriver

  • Alarm relay terminal block

7/16-in. (11 mm) nut driver or socket wrench

  • DC power supply

  • Cables and connectors

Blank panels (if component is not reinstalled)

  • DPC

  • FPC

  • PIC

  • MPC

  • MIC

  • Power supply

  • Routing Engine

  • SCB

Electrostatic bag or antistatic mat

  • Craft Interface

  • DPC

  • FPC

  • PIC

  • MPC

  • MIC

  • Routing Engine

  • SCB

Electrostatic discharge (ESD) grounding wrist strap

  • All

Flat-blade (–) screwdriver

  • DPC

  • Cables and connectors

Phillips (+) screwdrivers, numbers 1 and 2

  • Air filter

  • Craft interface

  • Fan tray

  • SCB

  • Routing Engine

  • Cables and connectors

Rubber safety cap

  • DPC

  • MPC

  • MIC

  • PIC

Wire cutters

  • Cables and connectors

  • DC power supply

Replacing the MX480 Craft Interface

  1. Disconnecting the Alarm Relay Wires from the MX480 Craft Interface

  2. Removing the MX480 Craft Interface

  3. Installing the MX480 Craft Interface

  4. Connecting the Alarm Relay Wires to the MX480 Craft Interface

Disconnecting the Alarm Relay Wires from the MX480 Craft Interface

To disconnect the alarm relay wires from the router and an alarm-reporting device (see Figure 1):

  1. Disconnect the existing wire at the external device.
  2. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  3. Using a 2.5-mm flat-blade screwdriver, loosen the small screws on the face of the terminal block and remove the block from the relay contact.
  4. Using the 2.5-mm flat-blade screwdriver, loosen the small screws on the side of the terminal block. Remove existing wires from the slots in the front of the block.
Figure 1: Alarm Relay Contacts
Alarm Relay Contacts

Removing the MX480 Craft Interface

To remove the craft interface (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. Detach any external devices connected to the craft interface.
  3. Loosen the captive screws at the left and right corners of the craft interface faceplate.
  4. Grasp the craft interface faceplate and carefully tilt it toward you until it is horizontal.
  5. Disconnect the ribbon cable from the back of the faceplate by gently pressing on both sides of the latch with your thumb and forefinger. Remove the craft interface from the chassis.
Figure 2: Removing the Craft Interface
Removing the
Craft Interface

Installing the MX480 Craft Interface

To install the craft interface (see Figure 3):

  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 craft interface with one hand, and hold the bottom edge of the craft interface with the other hand to support its weight.
  3. Orient the ribbon cable so that it plugs into the connector socket. The connector is keyed and can be inserted only one way.
  4. Align the bottom of the craft interface with the sheet metal above the card cage and press it into place.
  5. Tighten the screws on the left and right corners of the craft interface faceplate.
  6. Reattach any external devices connected to the craft interface.
Figure 3: Installing the Craft Interface
Installing
the Craft Interface

Connecting the Alarm Relay Wires to the MX480 Craft Interface

To connect the alarm relay wires between a router and an alarm-reporting device (see Figure 4):

  1. Prepare the required length of replacement wire with gauge between 28-AWG and 14-AWG (0.08 and 2.08 mm2).
  2. Insert the replacement wires into the slots in the front of the block. Use a 2.5-mm flat-blade screwdriver to tighten the screws and secure the wire.
  3. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  4. Plug the terminal block into the relay contact, and use a 2.5-mm flat-blade screwdriver to tighten the screws on the face of the block.
  5. Attach the other end of the wires to the external device.
Figure 4: Alarm Relay Contacts
Alarm Relay Contacts

Replacing the MX480 Cable Management Brackets

To remove the cable management brackets (see Figure 5):

  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 screws on either side of the chassis.
  3. Remove the cable management brackets.

To install the cable management brackets (see Figure 5):

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Position the on the front sides of the chassis.
  3. Insert the tabs into the slots.
  4. Tighten the screws completely.
Figure 5: Removing the Cable Management Brackets
Removing the Cable Management Brackets

Replacing the Management Ethernet Cable on an MX Series Router

One Ethernet cable with RJ-45 connectors is provided with the router. To replace the cable connected to the ETHERNET port:

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Press the tab on the connector, and pull the connector straight out of the port. Figure 6 shows the connector.
  3. Disconnect the cable from the network device.
  4. Plug one end of the replacement cable into the ETHERNET port. Figure 7 shows the port.
  5. Plug the other end of the cable into the network device.
Figure 6: Cable Connector
 Cable Connector
Figure 7: Ethernet Port
Ethernet Port

Replacing the Console or Auxiliary Cable on an MX480 Router

To use a system console to configure and manage the Routing Engine, connect it to the CONSOLE port on the Routing Engine. To use a laptop, modem, or other auxiliary device, connect it to the AUX port on the Routing Engine. Both ports accept a cable with an RJ-45 connector. One RJ-45/DB-9 cable is provided with the router. If you want to connect a device to both ports, you must supply another cable.

To replace a cable connected to a management console or auxiliary device:

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Press the tab on the connector, and pull the connector straight out of the port.
  3. Disconnect the cable from the console or auxiliary device.
  4. Plug the RJ-45 end of the replacement serial cable into the CONSOLE or AUX port. Figure 8 shows the external device ports on the Routing Engine.
  5. Plug the female DB-9 end into the console or auxiliary device's serial port.
Figure 8: Auxiliary and Console Ports
Auxiliary and Console
Ports