Cisco XR 12416 User manual

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CHAPTER
5
Maintaining the Router
The Cisco XR 12416 router is equipped as ordered and is ready for installation
and startup when it is shipped. As your networking requirements change, you may
need to upgrade the system by adding or changing components. This chapter
describes how to maintain router components.
Procedures for maintaining the router are described in the following sections:
•Powering Off the Router, page 5-2
•Removing and Installing Front Doors, page 5-3
•Cleaning or Replacing the Chassis Air Filter, page 5-7
•Removing and Replacing Blower Modules, page 5-10
•Removing and Replacing AC and DC Power Subsystem Components,
page 5-14
•Removing and Replacing the Standard AC-Input Power Shelf, page 5-19
•Removing and Replacing the Optional 2-Level AC-Input Power Shelf,
page 5-24
•Upgrading to the Optional AC Power Shelf, page 5-30
•Removing and Replacing a DC PEM, page 5-31
•Removing and Replacing the DC Power Shelf, page 5-37
•Removing and Replacing Cards from the Chassis, page 5-46
•Removing and Installing a Chassis, page 5-53
•Removing and Replacing a Power Bus Board Fuse, page 5-61

Chapter 5 Maintaining the Router
Powering Off the Router
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Prerequisites and Preparation
Before you perform any of the procedures in this chapter, be sure that you:
•Review the “Safety Guidelines” section on page 2-2.
•Read the safety and ESD-prevention guidelines described in the “Preventing
Electrostatic Discharge Damage” section on page 2-4.
•Ensure that you have all of the necessary tools and equipment before
beginning the procedure.
•Have access to the following documents during the installation:
– Regulatory Compliance and Safety Information for Cisco 12000 Series
Routers publication that shipped with the router.
Powering Off the Router
Most field-replaceable units (FRUs) can be removed and replaced with the power
on and the system operating. This is known as online insertion and removal (OIR).
Power supplies, line cards, the RP, CSCs, SFCs, and alarm cards all support OIR.
Unless otherwise noted, the maintenance tasks described in this chapter can be
performed while the router remains powered on.
In some cases it may be necessary to power off the router, for example, to upgrade
power supplies or to replace a power shelf. Use the following procedure to power
off the router.
Step 1 Set the power switch on each power supply to the off (0) position.
Step 2 Power off all circuit breakers for the source power lines connected to the power
supplies.
Step 3 Verify that the PWR OK indicator on each power supply is off.
Step 4 Verify that the OK indicator on each blower module is off.

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Chapter 5 Maintaining the Router
Removing and Installing Front Doors
Removing and Installing Front Doors
The router ships with the door hinges mounted on the left side of the chassis so
that they open from right-to-left. This section describes how to change the front
doors to open from left-to-right by installing the hinges on the opposite side.
Use the following procedure to change the location of the hinges.
Note The illustrations in this procedure show the top front door, but the procedure is
the same for either the top or bottom door.

Chapter 5 Maintaining the Router
Removing and Installing Front Doors
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Step 1 Open the top front door by pressing the right latch button (Figure 5-1).
Figure 5-1 Opening the Front Door
1Front door latches
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Chapter 5 Maintaining the Router
Removing and Installing Front Doors
Step 2 Remove the front door by lifting the (top and bottom) hinge pins to free the door
from the chassis (Figure 5-2).
Caution Make sure you are holding the front door securely so it does not drop when you
release it from the chassis.
Figure 5-2 Removing or Installing Hinge Pins
Reinstall the hinge pins into the chassis hinge brackets
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Chapter 5 Maintaining the Router
Removing and Installing Front Doors
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Step 3 Remove the bumpers and pivot blocks from the door as shown in Figure 5-3.
Figure 5-3 Removing the Bumpers and Pivot Blocks
1Bumpers 2Pivot blocks
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Chapter 5 Maintaining the Router
Cleaning or Replacing the Chassis Air Filter
Step 4 Reinstall the hardware to the opposite sides of the front door:
a. Mount pivot blocks to the left side and tighten the screws until snug.
b. Mount the bumpers to the right side and tighten the screws until snug.
Step 5 Attach the front door to the chassis:
a. Remove the hinge pins from the hinges on the right side of the chassis.
b. Align the pivot blocks on the front door with the hinges on the right side of
the chassis and install the hinge pins to hold the door in place (see
Figure 5-2).
c. Close the front door by pressing the latch button, allowing the door latch to
engage with the hinge pins on the chassis.
Step 6 Repeat Step 1 through Step 5 for the bottom door.
Cleaning or Replacing the Chassis Air Filter
The router is equipped a user-serviceable air filter that removes dust drawn into
the router. One time per month (or more often in dusty environments), examine
the air filter for damage and cleanliness.
Caution Damage to the air filter can restrict the airflow, cause overheating in the router,
and degrade EMI performance. Be careful when cleaning and replacing the filter.

Chapter 5 Maintaining the Router
Cleaning or Replacing the Chassis Air Filter
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Use the following procedure to clean or replace the air filter.
Step 1 Loosen the 4 captive screws on the air filter door and pivot the door open
(Figure 5-4).
Figure 5-4 Opening the Chassis Air Filter Door
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Chapter 5 Maintaining the Router
Cleaning or Replacing the Chassis Air Filter
Step 2 Lift up the air filter and carefully slide it out of the door (Figure 5-5).
Caution Be careful not to damage the honeycomb screens on the back of the
air filter door and in the fabric card cage. Damage to the honeycomb
screens can restrict airflow, cause overheating, and affect EMI
performance.
Figure 5-5 Removing the Chassis Air Filter
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Chapter 5 Maintaining the Router
Removing and Replacing Blower Modules
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Step 3 Visually check the condition of the air filter to determine whether to clean it or
install a new replacement.
•Dirty—You can vacuum or replace the filter.
Caution Do not vacuum the air filter while it is installed in the chassis. You must remove
the air filter completely before you clean it to prevent contaminants from being
drawn into the bays or cage.
•Worn or torn—If the filter appears worn or torn, dispose of it in a responsible
manner and install a replacement air filter (12000/16-FILTER=).
Step 4 Slide the new or cleaned air filter into the air filter door.
Step 5 Close the air filter door and tighten the 4 captive screws.
Caution Align and seat the door carefully to avoid damaging the
EMI-preventive gasket contacts on the door. The air filter door must
be closed and secured at all times to maintain correct
EMI performance.
Removing and Replacing Blower Modules
The blower modules support online insertion and removal (OIR), so you can
remove and install a blower module while the system remains powered on without
presenting an electrical hazard or damage to the system. You can replace a blower
module while the system maintains all routing information and ensures session
preservation.
Caution Although the blower module supports OIR and can be replaced without
interruption to system operation, the system should not operate without a blower
module for more than 3 minutes to prevent overheating.

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Chapter 5 Maintaining the Router
Removing and Replacing Blower Modules
Upper and Lower Blower Module Orientation
Illustrations in this procedure show the removal and replacement of the upper
blower module. The procedure to replace the lower blower module is the same
except for the orientation of the blower module.
•Heads-up orientation—Install the blower module in the upper bay in the
“heads-up” orientation with the three fan air intake openings face down.
•Heads-down orientation—Install the blower module in the lower blower
module bay in the “heads-down” orientation with the three fan air intake
openings face up.
Use the following procedure to remove and replace the blower modules.
Step 1 Remove the blower module from the chassis (Figure 5-6):
a. Loosen the captive screw on each side of the blower module.
b. Pull out the blower module halfway from the module bay.
c. Slide out the blower module completely from the module bay while
supporting it with your other hand.
Warning The blower module weighs approximately 20 pounds (9 kg). Use two hands
when handling the blower module.

Chapter 5 Maintaining the Router
Removing and Replacing Blower Modules
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Figure 5-6 Removing the Upper Blower Module
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Chapter 5 Maintaining the Router
Removing and Replacing Blower Modules
Step 2 Install the new blower module into the chassis (Figure 5-7):
a. Lift the blower module (with two hands) and slide it halfway into the module
bay.
b. Slowly push the blower module into the chassis until it mates with the
backplane connector at the back of the module bay.
Caution To prevent damage to the connectors, do not use excessive force when inserting
the blower module into the chassis.
c. Tighten the captive screws on the blower module to secure it to the chassis.
•The (green) OK status indicator on the front of the blower module should
light. If the OK indicator does not light, see the “Isolating Cooling Subsystem
Problems” section on page 4-37.
Figure 5-7 Installing the Upper Blower Module
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Chapter 5 Maintaining the Router
Removing and Replacing AC and DC Power Subsystem Components
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Removing and Replacing AC and DC Power
Subsystem Components
The Cisco XR 12416 router supports online insertion and removal (OIR). If you
are replacing a redundant power supply, you can remove and install the power
supply while the system remains powered on without causing an electrical hazard
or damage to the system. This feature enables you replace a power supply while
the system maintains all routing information and ensures session preservation.
However, to maintain operational redundancy, proper cooling, and meet EMI
compliance standards, you must have all three (standard) or four (optional)
working power supplies installed. When you remove a failed power supply with
the router in operation, perform the replacement as quickly as possible. Make sure
you have the tools and the replacement power supply ready before beginning the
removal and installation procedure.
Removing and Replacing an AC Power Supply
This section provides the procedure to remove an AC power supply from the
standard single-level AC power shelf. The procedure to remove an AC-input
power supply from the optional double-level AC-input power shelf are identical
to these; only the slot locations for AC-input power supplies are different.

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Chapter 5 Maintaining the Router
Removing and Replacing AC and DC Power Subsystem Components
Figure 5-8 shows AC power shelves housing the power supplies.
Figure 5-8 Standard and Optional AC Power Shelves
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Chapter 5 Maintaining the Router
Removing and Replacing AC and DC Power Subsystem Components
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Figure 5-9 identifies the components of the AC power supply.
Figure 5-9 AC Power Supply Components
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Chapter 5 Maintaining the Router
Removing and Replacing AC and DC Power Subsystem Components
To remove and replace an AC power supply, use the following procedure.
Step 1 Unplug the power supply cord from its AC outlet.
Step 2 Power off the circuit breaker assigned to that AC outlet.
Warning To ensure that power remains off while you are performing this procedure, tape
the circuit breaker switch in the off (0) position.
Step 3 Remove the PEM from the power shelf (Figure 5-10):
a. Loosen the captive screw to release the ejector handle.
b. Pivot the ejector handle down to eject the power supply from its backplane
connector.
c. Slide the power supply out of its bay while supporting it with your other hand.
Figure 5-10 Removing an AC Power Supply
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Chapter 5 Maintaining the Router
Removing and Replacing AC and DC Power Subsystem Components
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Step 4 Install the new power supply (Figure 5-11):
a. Slide the power supply into the bay until it mates with its backplane
connector.
Caution To prevent damage to the power shelf backplane connector, do not use excessive
force when inserting the power supply into its power shelf bay.
b. Lift up the ejector handle to hook it over the bottom edge of the power shelf.
c. Tighten the captive screw to secure the power supply in the shelf.
Figure 5-11 Installing an AC Power Supply
Step 5 Plug the power supply cable into its AC outlet.
Step 6 Power on the circuit breaker to that AC outlet.
After the power-on sequence completes, the (green) PWR OK indicator on the
front of the power supply should light. If the indicator does not light, see the
“Troubleshooting an AC Power Supply” section on page 4-5.
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Chapter 5 Maintaining the Router
Removing and Replacing the Standard AC-Input Power Shelf
Removing and Replacing the Standard AC-Input
Power Shelf
Use the following procedure to remove and replace the standard AC-input power
shelf.
Caution To remove and replace the power shelf, the system must be powered off. Be sure
to notify the network administrator and other appropriate personnel that all
routing traffic stops while the upgrade takes place.
Step 1 Remove all of the power supplies as described in “Removing and Replacing an
AC Power Supply” section on page 5-14.
Step 2 Disconnect each of the AC power cords from the back panel of the power shelf by
lifting the retention clip and unplugging the cord (Figure 5-12).
Figure 5-12 Disconnecting AC Power Cords
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Chapter 5 Maintaining the Router
Removing and Replacing the Standard AC-Input Power Shelf
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Step 3 Unseat the power shelf from the chassis (Figure 5-13):
a. Loosen the two captive screws on each side of the power shelf.
b. Loosen the ejector jackscrew to unseat the power shelf from the power
interface panel connectors.
Figure 5-13 Unseating the Power Shelf
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