Cisco ASR 902 Manuale utente

Installing the Cisco ASR 902 Router

This chapter describes how to install the Cisco ASR 902 Router.

•Prerequisites, page 1

•Installing the Router in a Rack, page 1

•Installing the Chassis Ground Connection, page 7

•Installing the Fan Tray, page 10

•RSP Installation, page 13

•Interface Module Installation, page 15

•Installing the Power Supply, page 18

•Connecting a Cisco ASR 902 Router to the Network, page 31

Prerequisites

Before installing the Cisco ASR 902 Router, it is important to prepare for the installation by:

•Preparing the site (site planning) and reviewing the installation plans or method of procedures (MOP).

•Unpacking and inspecting the Cisco ASR 902 Router.

•Gathering the tools and test equipment required to properly install the Cisco ASR 902 Router.

For more instructions on how to prepare for the installation of the Cisco ASR 902 Router, see Preparing for

Installation.

Installing the Router in a Rack

The following sections describe how to install the Cisco ASR 902 Router in a rack. The procedures in this

section apply to both horizontal and vertical mounting of the router in a rack:

Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide

Installing the Chassis Brackets

The chassis is shipped with mounting brackets that can be installed on the front or rear of the chassis. To

install the brackets on the front of the chassis, perform these steps:

Step 1 Remove the rack-mount brackets from the accessory kit and position them beside the router chassis.

The figure below shows how to attach the brackets on the Cisco ASR 902 Router for a 19-inch EIA rack.

Figure 1: Attaching Mounting Brackets for a 19-inch EIA Rack

The figure below shows how to attach the brackets on the Cisco ASR 902 Router for a 300-mm ETSI cabinet.

Figure 2: Attaching Mounting Brackets for a 300-mm ETSI Cabinet

Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide

Installing the Cisco ASR 902 Router

Installing the Chassis Brackets

Step 2 Position one of the brackets against the chassis side, and align the screw holes.

Step 3 Secure the bracket to the chassis with the screws removed when performing Step 1 . The recommended maximum torque

is 28 in.-lb (3.16 N-m).

Step 4 Repeat Step 2 and Step 3 for the other bracket.

Installing the Router Chassis in the Rack

Ensure adequate air flow when mounting the router in a rack. For more information, see the Air Flow

Guidelines section.

Note

Install the cable guides before installing the router in a 19-inch EIA rack.Note

To install the router chassis in the equipment rack, perform these steps:

Step 1 Position the chassis in the rack as follows:

•If the front of the chassis (front panel) is at the front of the rack, insert the rear of the chassis between the mounting

posts.

•If the rear of the chassis is at the front of the rack, insert the front of the chassis between the mounting posts.

Step 2 Align the mounting holes in the bracket (and optional cable guide) with the mounting holes in the equipment rack.

Do not use interface module or power supply ejector handles to lift the chassis; using these handles to lift the

chassis can deform or damage the handles.

Caution

The figure below shows how to install the Cisco ASR 902 Router in a 19-inch EIA rack.

Figure 3: Attaching Mounting Brackets for a 19-inch EIA Rack

Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide

Installing the Cisco ASR 902 Router

Installing the Router Chassis in the Rack

The figure below shows how to install the Cisco ASR 902 Router in a 300-mm ETSI Cabinet.

Figure 4: Installing the Chassis in a 300-mm ETSI Cabinet

Step 3 Install the 8 or 12 (4 or 6 per side) 12-24 x 3/4-inch or 10-32 x 3/4-inch screws through the holes in the bracket and into

the threaded holes in the equipment rack posts.

Step 4 Use a tape measure and level to verify that the chassis is installed straight and level.

Installing the Router Chassis in the Air Plenum

Ensure that the router is not installed in the Air Plenum while mounting it on the rack.Note

Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide

Installing the Cisco ASR 902 Router

Installing the Router Chassis in the Air Plenum

For instructions on mounting the air plenum on the rack, see Manufacturers of Equipment Used in Cisco ASR

902 Router.

Step 1 Position the chassis so that the rear of the chassis is at the front of the plenum. See the figure below .

Step 2 Slide the chassis into the plenum so that the front of the chassis is in flush with the mounting rails and brackets.

Figure 5: Cisco ASR 902 Chassis with Air Plenum

Air plenum2Cisco ASR 902 router1

Attaching the Cable Guides

The Cisco ASR 902 Router supports the following cable guides:

•A902-CABLE GUIDE-LEFT—This guide helps in routing the cables from the interface modules, thereby

enabling a proper cable-bending radius. (See the figure below.)

•A902-CABLE GUIDE-RIGHT—This guide helps in routing the cables from the power supplies and

the RSP module, thereby enabling a proper cable-bending radius. (See the figure below.)

If the chassis is mounted using 19-inch brackets, you must assemble the cable guides before installing the

chassis on the rack.

Note

Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide

Installing the Cisco ASR 902 Router

Attaching the Cable Guides

The cable guides should be assembled together. We recommend that the cable guides be installed before

the chassis is installed in the air plenum.

To install a cable guide, perform these steps:

Note

Step 1 Position the cable guide-left and cable guide-right against the front of the chassis and align the four screw holes, as shown

in the figure below.

Figure 6: Cable Guide Installation

ComponentLabel

Cable guide-left1

Cable guide-right2

Step 2 Secure the cable guides with the four M3.5 screws supplied with the cable kit. The recommended maximum torque is

10 in.-lb (1.12 N-m).

Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide

Installing the Cisco ASR 902 Router

Attaching the Cable Guides

Installing the Chassis Ground Connection

Before you connect the power or turn on the power to the Cisco ASR 902 Router, you must provide an adequate

chassis ground (earth) connection to your router.

This section describes how to ground the Cisco ASR 902 Router chassis. The router provides two locations

for attaching a 2-hole grounding lug according to the rack-mounting brackets you use to install the router.

The Cisco ASR 902 Router supports the following rack-mounting types:

•EIA 19-inch rack—Attach the grounding lug to the rear of the router, as shown in the figure below .

Figure 7: Attaching a Grounding Lug to the Rear of the Router

Grounding-lug (19-inch EIA rack)1

•300-mm ETSI cabinet—Attach the grounding lug on the rack-mount bracket on the front of the router,

as shown in the figure below .

Figure 8: Attaching a Grounding Lug to the Rack-Mount Bracket

Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide

Installing the Cisco ASR 902 Router

Installing the Chassis Ground Connection

Grounding lug (300 mm ETSI cabinet)1

To ensure that the chassis ground connection that you provide is adequate, you need the following parts and

tools:

•Ratcheting torque screwdriver with Phillips head that exerts up to 15 in.-lb (1.69 N-m) of pressure for

attaching the ground wire to the router

•Crimping tool as specified by the ground lug manufacturer

•6-AWG or larger copper wire for the ground wire

•Wire-stripping tools appropriate to the wire you are using

Before making connections to the Cisco ASR 902 Router, ensure that you disconnect the power at the

circuit breaker. Otherwise, severe injury to you or damage to the router may occur.

Caution

This equipment must be grounded. 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. Statement 1024

Warning

Use copper conductors only. Statement 1025Warning

When installing or replacing the unit, the ground connection must always be made first and disconnected

last. Statement 1046

Warning

This unit is to be installed in a restrictive access location and must be permanently grounded to a minimum

6-AWG copper ground wire.

Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide

Installing the Cisco ASR 902 Router

Installing the Chassis Ground Connection

Perform the following procedure to ground the Cisco ASR 902 Router using a 2-hole lug and the corresponding

mounting point. Most carriers require a minimum 6-AWG ground connection. Verify your carrier’s requirements

for the ground connection.

Step 1 If your ground wire is insulated, use a wire-stripping tool to strip the ground wire to 0.5 inch ± 0.02 inch (12.7 mm ±0.5

mm) ( the figure below ).

Figure 9: Stripping a Ground Wire

Step 2 Slide the open end of your 2-hole ground lug over the exposed area of the ground wire.

Step 3 Using a crimping tool (as specified by the ground lug manufacturer), crimp the ground lug to the ground wire as shown

in the figure below.

Figure 10: Crimping a Ground Lug on to the Ground Wire

Step 4 Use a Phillips head screwdriver to attach the 2-hole ground lug and wire assembly to the router with the 2 pan-head

Phillips head screws. For a 19-inch EIA rack, attach the 2-hole ground lug to the rear of the router.

Step 5 Connect the other end of the ground wire to a suitable grounding point at your site.

Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide

Installing the Cisco ASR 902 Router

Installing the Chassis Ground Connection

Installing the Fan Tray

The fan tray is a modular unit that provides cooling to the Cisco ASR 902 Router. Follow these steps to install

the fan tray in the chassis:

Step 1 Orient the fan tray so that the captive screws are on the left side of the fan tray’s front panel. The figure below shows

how to orient the fan tray.

Figure 11: Installing the Fan Tray

Step 2 Guide the fan tray into the chassis until it is fully seated.

The fans are exposed on the left side of the fan tray. Keep your fingers, clothing, and jewelry away from the

fans. Always handle the fan tray by the handle.

Caution

When installing the cabling to the RSP, we recommend that you leave a service loop of extra cabling sufficient

to allow for fan tray removal.

Note

Step 3 Secure the fan tray to the chassis using the attached captive installation screws. The recommended maximum torque is

5.5 in.-lb (.62 N-m).

This completes the procedure for installing or replacing the fan tray in a Cisco ASR 902 Router.

For information about connecting cables to the fan tray alarm port, see the Connecting the Fan Tray Alarm Port section.

For a summary of the LEDs on the fan tray, see the LED Summary section. For more information about air flow guidelines,

see the Air Flow Guidelines section.

Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide

Installing the Cisco ASR 902 Router

Installing the Fan Tray

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