Cisco ASR 920 series Manuale utente
Installing the Cisco ASR 920 Series Router
This chapter describes how to install the Cisco ASR 920 Series Router and includes the following sections:
•Prerequisites, on page 1
•Installing the Router in a Rack, on page 1
•Wall Mounting the Cisco ASR 920 Series Router, on page 8
•Install the AC Power Cables, on page 11
•Install the DC Power Supply, on page 13
•Connect SFP Modules, on page 16
•Connect Gigabit Ethernet Ports, on page 20
•Install the Chassis Ground Connection, on page 21
•Power Connection Guidelines, on page 23
•Connect Chassis to Network, on page 25
Prerequisites
Before installing the Cisco ASR 920 Series 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).
See “Site Planning” section on page 2-9 .
• Unpacking and inspecting the Cisco ASR 920 Series Router. See “Receiving the Cisco ASR 920 Series
Router” section on page 2-20 .
• Gathering the tools and test equipment required to properly install the Cisco ASR 920 Series Router. See
“Tools and Equipment” section on page 2-21 .
For more instructions on how to prepare for the installation of the Cisco ASR 920 Series Router, see Chapter
2, “Preparing for Installation.”
Installing the Router in a Rack
The following sections describe how to install the Cisco ASR 920 Series Router in a rack. The procedures in
this section apply to both horizontal and vertical mounting of the router in a rack:
Installing the Cisco ASR 920 Series Router
1
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:
SUMMARY STEPS
1. Remove the rack-mount brackets from the accessory kit and position them beside the router chassis.
2. Position one of the brackets against the chassis side, and align the screw holes.
3. Secure the bracket to the chassis with the screws removed when performing Step 1 . The recommended
maximum torque is 10 in.-lb.
4. Repeat Step 2 and Step 3 for the other bracket.
DETAILED 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 at the front, middle, and rear positions on the Cisco ASR 920 Series
Router for a 19-inch EIA rack.
Figure 1: Attaching Mounting Brackets for a 19-inch EIA Rack (Front, Middle, and Rear Positions)
Installing the Cisco ASR 920 Series Router
2
Installing the Cisco ASR 920 Series Router
Installing the Chassis Brackets
Figure 2: Shows how to attach the brackets on the Cisco ASR 920 Series Router for a 23-inch cabinet.
Figure 3: Attaching Mounting Brackets for a 23-inch Cabinet (Front, Middle, and Rear Positions)
Installing the Cisco ASR 920 Series Router
3
Installing the Cisco ASR 920 Series Router
Installing the Chassis Brackets
Figure 4: Attaching Mounting Brackets for a 300 mm ETSI Cabinet (Front, Middle, and Rear Positions)
Installing the Cisco ASR 920 Series Router
4
Installing the Cisco ASR 920 Series 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 10 in.-lb.
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 on page 11 .
Note
Install the cable guides before installing the router in a 19-inch EIA rack. See Attaching the Cable Guides.
Note
To install the router chassis in the equipment rack, perform these steps:
Installing the Cisco ASR 920 Series Router
5
Installing the Cisco ASR 920 Series Router
Installing the Router Chassis in the Rack
SUMMARY STEPS
1. Position the chassis in the rack as follows:
2. Align the mounting holes in the bracket (and optional cable guide) with the mounting holes in the equipment
rack.
3. Install the four M6x12mm zinc-plated steel screws through the holes in the bracket and into the threaded
holes in the equipment rack posts.
4. Use a tape measure and level to verify that the chassis is installed straight and level.
DETAILED 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.
The following figure shows how to install the Cisco ASR 920 Series Router in a 19-inch EIA rack.
Figure 5: Installing the Chassis in a 19-inch EIA Rack
Step 3 Install the four M6x12mm zinc-plated steel 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.
Attaching the Cable Guides
The Cisco ASR 920 Series Router supports the following cable guides:
• A920-CBL-GUIDE (left and right)—help in routing the cables from all components on the front panel
thereby enabling a proper cable-bending radius.
Installing the Cisco ASR 920 Series Router
6
Installing the Cisco ASR 920 Series Router
Attaching the Cable Guides
If the chassis is mounted using 19-inch brackets, you must assemble the cable guides before installing the
chassis on the rack.
Note
To install the cable guides, perform these steps:
SUMMARY STEPS
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 fgure below.
2. Secure the cable guides with the four M6x12mm screws supplied with the cable kit. The recommended
maximum torque is 3N-m.
DETAILED STEPS
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 fgure below.
Figure 6: Cable Guide Installation For 19-inch Rack Brackets
Installing the Cisco ASR 920 Series Router
7
Installing the Cisco ASR 920 Series Router
Attaching the Cable Guides
Figure 7: Cable Guide Installation For ETSI Rack Brackets
Step 2 Secure the cable guides with the four M6x12mm screws supplied with the cable kit. The recommended maximum torque
is 3N-m.
Figure 8: Installing the Cable Guides (As Per the Standard Kit)
Wall Mounting the Cisco ASR 920 Series Router
To install the Cisco ASR 920 Series Router on a wall, follow the instructions in these procedures:
Attaching the Brackets to the Router for Wall-Mounting
While wall mounting the Cisco ASR 920 Series Router, always ensure that the power supplies are at the top
position.
Note
Installing the Cisco ASR 920 Series Router
8
Installing the Cisco ASR 920 Series Router
Wall Mounting the Cisco ASR 920 Series Router
The figure below shows how to attach a 19-inch bracket to one side of the router. Follow the same steps to
attach the second bracket to the opposite side.
Figure 9: Attaching 19-inch Brackets for Wall Mounting
Mounting Cisco ASR 920 Series Router on the Wall
For the best support of the Cisco ASR 920 Series Router and cables, ensure the router is attached securely to
wall studs or to a firmly attached plywood mounting backboard.
Suitable for mounting on and over a concrete or other non-combustible surface only. Statement 345
Warning
Installing the Cisco ASR 920 Series Router
9
Installing the Cisco ASR 920 Series Router
Mounting Cisco ASR 920 Series Router on the Wall
Before mounting the router, ensure that all unused holes at the sides of the router are always protected by
screws.
Figure 10: Installing Screws in Unused Holes Before Wall Mounting the Router
Caution
Mount the router with the front panel as shown in the following figure.
Installing the Cisco ASR 920 Series Router
10
Installing the Cisco ASR 920 Series Router
Mounting Cisco ASR 920 Series Router on the Wall
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