Cisco ASR 920 series Instruction Manual

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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” section on page 3-1
•“Installing the Router in a Rack” section on page 3-1
•“Installing the Chassis Ground Connection” section on page 3-21
•“Connecting a Cisco ASR 920 Series Router to the Network” section on page 3-25
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 Chassis Brackets” section on page 3-2
•“Installing the Router Chassis in the Rack” section on page 3-6
•“Attaching the Cable Guides” section on page 3-7

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Installing the Router in a Rack
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.
Figure 3-1 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 3-1 Attaching Mounting Brackets for a 19-inch EIA Rack (Front, Middle, and Rear Positions)
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Figure 3-2 shows how to attach the brackets on the Cisco ASR 920 Series Router for a 23-inch cabinet.
Figure 3-2 Attaching Mounting Brackets for a 23-inch Cabinet (Front, Middle, and Rear Positions)
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Installing the Router in a Rack
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Figure 3-3 Attaching Mounting Brackets for a 300 mm ETSI Cabinet (Front, Middle, and Rear Positions)
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Installing the Router in a Rack
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 2and Step 3for the other bracket.
Installing the Router Chassis in the Rack
Note 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, page 3-7.
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.
The following figure shows how to install the Cisco ASR 920 Series Router in a 19-inch EIA rack.
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Figure 3-4 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.
Note If the chassis is mounted using 19-inch brackets, you must assemble the cable guides before installing
the chassis on the rack.
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Installing the Router in a Rack
To install the cable guides, perform these 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 Figure 3-5.
Figure 3-5 Cable Guide Installation For 19-inch Rack Brackets
Figure 3-6 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.
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Figure 3-7 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, page 3-9
•Mounting Cisco ASR 920 Series Router on the Wall, page 3-10
Attaching the Brackets to the Router for Wall-Mounting
Note While wall mounting the Cisco ASR 920 Series Router, always ensure that the power supplies are at the
top position.
Figure 3-8 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.
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Wall Mounting the Cisco ASR 920 Series Router
Figure 3-8 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.
Warning Suitable for mounting on and over a concrete or other non-combustible surface only. Statement 345
Caution Before mounting the router, ensure that all unused holes at the sides of the router are always protected
by screws.
Figure 3-9 Installing Screws in Unused Holes Before Wall Mounting the Router
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Installing the AC Power Cables
Mount the router with the front panel as shown in the following figure.
Figure 3-10 Mounting the Router on the Wall
Caution When mounting the router vertically, ensure that the power supplies are at the top.
Installing the AC Power Cables
To install the AC power cables in the power supply slots:
Step 1 Attach the AC power retainer chord as shown in the figure below.
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Figure 3-11 Attaching the AC Power Retainer Chord
Step 2 Lift the power retainer and plug in the AC power supply.
Push the retainer chord towards the power supply chord to lock it in place.
Figure 3-12 Locking the Power Retainer Chord
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Installing the DC Power Supply
Installing the DC Power Supply
Note When installing DC power supply, use 14 AWG, 90°C wires. Always ensure that the building’s
installation for short-circuit (overcurrent) protection does not exceed 15A.
Note The DC connector or terminal block has an inbuilt screw and cage nut to which a torque of 1.3 to 1.8
N-m can be applied.
Figure 3-13 DC Connector With Inbuilt Screw
To attach the DC power supplies:
Step 1 Open the DC power supply guard.
Step 2 Attach the DC supply wires in the designated screws. See Figure 3-14.
M
A
C
B
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A 0.97 inches C 0.27 inches
B 0.31 inches M 0.81 inches

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Figure 3-14 Using the DC Power Supply Guard
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Installing and Removing SFP Modules
Figure 3-15 Attaching the DC Power Supply
Step 3 Close the DC power supply guard.
Powering On the Router
After the router is either rack mounted or mounted on the wall, perform these tasks to complete the
installation:
•Power on the router.
•Connect the front-panel ports. See the Connecting to SFP Modules, page 3-20 to complete the
installation.
Installing and Removing SFP Modules
These sections describe how to install and remove SFP modules. The modules are inserted into the SFP
module slots as depicted in Figure 3-17. These field-replaceable modules provide interfaces.
See the Supported SFPs and PIDs for the list of SFP modules that the router supports. Each port must
match the wavelength specifications on the other end of the cable. For reliable communications, the
cable must not exceed the stipulated cable length.
Use only Cisco SFP modules on the Cisco router. Each SFP module has an internal serial EEPROM that
is encoded with security information. This encoding provides a way for Cisco to identify and validate
that the SFP module meets the requirements for the router.
For detailed instructions on installing, removing, and cabling the SFP module, see the SFP module
documentation.
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Installing SFP Modules
Figure 3-16 shows an SFP module that has a bale-clasp latch.
Caution We strongly recommend that you do not install or remove fiber-optic SFP modules with cables attached
because of the potential damage to the cables, the cable connector, or the optical interfaces in the SFP
module. Disconnect all cables before removing or installing an SFP module.
Removing and installing an SFP module can shorten its useful life. Do not remove and insert SFP
modules more often than is absolutely necessary.
Figure 3-16 SFP Module with a Bale-Clasp Latch
To insert an SFP module into the module slot, follow these steps:
Step 1 Attach an ESD-preventive wrist strap to your wrist and to a bare metal surface on the chassis.
Some SFP modules identify the top side of the module with send (TX) and receive (RX) markings or
arrows that show the direction of the connection.
Step 2 If the SFP module that you are using has the markings, use them to identify the top side of the module.
Step 3 Align the SFP module in front of the slot opening.
Step 4 Insert the SFP module into the slot until you feel the connector on the module snap into place in the rear
of the slot.
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Figure 3-17 Installing an SFP Module into an SFP Module Slot
Caution Do not remove the dust plugs from the fiber-optic SFP module port or the rubber caps from the
fiber-optic cable until you are ready to connect the cable. The plugs and caps protect the SFP module
ports and cables from contamination and ambient light. Store the dust plugs for later use.
Step 5 Insert the cable connector into the SFP module:
•For fiber-optic SFP modules, insert the LC cable into the SFP module.
•For copper 1000BASE-T SFP modules, insert the RJ-45 cable connector into the SFP module.
Removing SFP Modules
To remove an SFP module from a module receptacle, follow these steps:
Step 1 Attach an ESD-preventive wrist strap to your wrist and to a bare metal surface on the chassis.
Step 2 Disconnect the cable from the SFP module, and insert a dust plug into the cable end.
Tip For reattachment, note which cable connector plug is send (TX) and which is receive (RX).
Step 3 Unlock and remove the SFP module, as shown in the following figure.
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Chapter 3 Installing the Cisco ASR 920 Series Router Connecting to the 10/100/1000 Ports
If the module has a bale-clasp latch, pull the bale out and down to eject the module. If the bale-clasp
latch is obstructed and you cannot use your index finger to open it, use a small, flat-blade screwdriver
or other long, narrow instrument to open the bale-clasp latch.
Figure 3-18 Removing a Bale-Clasp Latch SFP Module
Step 4 Grasp the SFP module between your thumb and index finger, and carefully remove it from the module
slot.
Step 5 For fiber-optic SFP modules, insert a dust plug into the optical ports of the SFP module to keep the
optical interfaces clean.
Step 6 Place the removed SFP module in an antistatic bag or other protective environment.
Connecting to the 10/100/1000 Ports
Note The router 10/100/1000 ports configure themselves to operate at the speed of attached devices. If the
attached ports do not support autonegotiation, you can explicitly set the speed and duplex parameters.
Connecting devices that do not autonegotiate or that have their speed and duplex parameters manually
set can reduce performance or result in no linkage.
To maximize performance, choose one of these methods for configuring the Ethernet ports:
•Let the ports autonegotiate both speed and duplex.
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Connecting to the 10/100/1000 Ports
•Set the port speed and duplex parameters on both ends of the connection.
Step 1 When connecting to workstations, servers, and routers, connect a straight-through cable to an RJ-45
connector on the front panel.When connecting to routers or repeaters, use a crossover cable.
Note You can use the mdix auto interface configuration command in the CLI to enable the automatic
medium-dependent interface crossover (auto-MDIX) feature. When the auto-MDIX feature is enabled,
the router detects the required cable type for copper Ethernet connections and configures the interfaces
accordingly. Therefore, you can use either a crossover or a straight-through cable for connections to a
copper 10/100/1000, or an SFP module port on the router, regardless of the type of device on the other
end of the connection.
Step 2 Connect the other end of the cable to an RJ-45 connector on the other device. The port LED turns on
when both the router and the connected device have established link.
If the port LED does not turn on, the device at the other end might not be turned on, or there might be a
cable problem or a problem with the adapter installed in the attached device.
Note On user network interface (UNI) ports, the port LED is green after the link is established.
Step 3 Reconfigure and reboot the connected device, if necessary.
Step 4 Repeat Steps 1 through 3 to connect each device.
Connecting to SFP Modules
This section describes how to connect to SFP modules. For instructions on how to connect to fiber-optic
SFP modules, see the Connecting to Fiber-Optic SFP Modules, page 3-20.
For instructions about how to install or remove an SFP module, see the Installing and Removing SFP
Modules, page 3-16.
Connecting to Fiber-Optic SFP Modules
Follow these steps to connect a fiber-optic cable to an SFP module:
Warning Class 1 laser product. Statement 1008
Caution Do not remove the rubber plugs from the SFP module port or the rubber caps from the fiber-optic cable
until you are ready to connect the cable. The plugs and caps protect the SFP module ports and cables
from contamination and ambient light.
Step 1 Remove the rubber plugs from the module port and fiber-optic cable, and store them for future use.
Step 2 Insert one end of the fiber-optic cable into the SFP module port.
Step 3 Insert the other cable end into a fiber-optic connector on a target device.
Step 4 Observe the port status LED.