Cisco Catalyst 4948E Instruction Manual

CHAPTER
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3
Installing the Switch
Revised: January 4, 2012
This chapter describes how to install the Catalyst 4948E switch in an equipment rack.
•Preparing to Install the Chassis, page 3-1
•Rack-Mounting the Chassis, page 3-5
•Installing the System Ground, page 3-10
•Connecting Power to the Switch, page 3-12
•Attaching the Interface Cables, page 3-15
•Powering Up the Switch, page 3-21
Note Before starting the installation procedures in this chapter, complete the site planning checklist in
Chapter 2, “Preparing for Installation” to verify that all planning activities were completed.
Preparing to Install the Chassis
This section covers these topics:
•Warnings, page 3-2
•Verifying Package Contents, page 3-4
•Required Tools, page 3-4
•Lifting the Chassis Safely, page 3-5
Tip For additional information about the Cisco Catalyst 4948E and the Catalyst 4948E-F switches (including
configuration examples and troubleshooting information), see the documents listed on this page:
http://www.cisco.com/en/US/products/ps6021/tsd_products_support_series_home.html

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Chapter 3 Installing the Switch
Preparing to Install the Chassis
Warnings
The installation-applicable warnings are listed below. Warning translations in multiple languages are
provided in Appendix D. Refer to the statement number for the translations.
Warning To prevent the switch from overheating, do not operate it in an area that exceeds the maximum
recommended ambient temperature of 104°F (40°C). To prevent airflow restriction, allow at least
3 inches (7.6 cm) of clearance around the ventilation openings. Statement 17
Warning This unit is intended for installation in restricted access areas. A restricted access area is where
access can only be gained by service personnel through the use of a special tool, lock and key, or
other means of security, and is controlled by the authority responsible for the location. Statement 37
Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground during
normal use. Statement 39
Warning Before working on equipment that is connected to power lines, remove jewelry (including rings,
necklaces, and watches). Metal objects will heat up when connected to power and ground and can
cause serious burns or weld the metal object to the terminals. Statement 43
Warning Do not stack the chassis on any other equipment. If the chassis falls, it can cause severe bodily injury
and equipment damage. Statement 48
Warning Ethernet cables must be shielded when used in a central office environment. Statement 171
Warning Do not work on the system or connect or disconnect cables during periods of lightning activity.
Statement 1001
Warning Read the installation instructions before connecting the system to the power source. Statement 1004

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Chapter 3 Installing the Switch
Preparing to Install the Chassis
Warning Class 1 laser product. Statement 1008
Warning This unit is intended for installation in restricted access areas. A restricted access area can be
accessed only through the use of a special tool, lock and key, or other means of security.
Statement 1017
Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030
Warning Ultimate disposal of this product should be handled according to all national laws and regulations.
Statement 1040
Warning This product requires short-circuit (overcurrent) protection, to be provided as part of the building
installation. Install only in accordance with national and local wiring regulations. Statement 1045
Warning When installing or replacing the unit, the ground connection must always be made first and
disconnected last. Statement 1046
Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into
beams or view directly with optical instruments. Statement 1051
Warning Installation of the equipment must comply with local and national electrical codes. Statement 1074
Warning To prevent bodily injury when mounting or servicing this unit in a rack, you must take special
precautions to ensure that the system remains stable. The following guidelines are provided to
ensure your safety:
• This unit should be mounted at the bottom of the rack if it is the only unit in the rack.
• When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest
component at the bottom of the rack.
• If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in
the rack. Statement 1006

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Chapter 3 Installing the Switch
Preparing to Install the Chassis
Verifying Package Contents
Carefully remove the chassis and accessory kit from the shipping container, and check each item for
damage. If any item is missing or damaged, contact your Cisco representative or reseller for support.
Return all packing material to the shipping container, and save it.
The chassis is shipped with these items in the accessory kit:
•One RJ-45 female-to-DB-9 female adapter plug
•System ground kit
•Rack-mounting kit that contains the following items:
– Two 19-inch rack-mounting brackets
– Eight M4 x 8 mm Phillips flat-head screws for attaching the brackets to the switch
– Four 12-24 x 3/4-inch and four 10-32 x 3/4-inch Phillips machine screws for attaching the
rack-mount brackets to a rack
– Disposable ESD wrist strap
Note A console cable is not provided in the accessory kit. It can ordered as an option.
Required Tools
To properly install the chassis, you need the following tools and equipment:
•No. 1 Phillips screwdriver
•No. 2 Phillips screwdriver
•3/16-inch flat-blade screwdriver
•Antistatic mat or antistatic foam
•Your own ESD grounding strap or the disposable ESD strap included with the system
•Tape measure and level
•Copper system ground wire (the required wire gauge is determined by local or national electrical
codes)
•Source DC power cables (the required wire gauge is determined by local or national electrical codes)
•Either insulated crimp-on spade lugs or insulated crimp-on ring connectors (the required size and
style is determined by local or national electrical codes)
•Wire-stripping tool
•Crimping tool

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Chapter 3 Installing the Switch
Rack-Mounting the Chassis
Lifting the Chassis Safely
Whenever you lift a chassis, follow these guidelines:
•Always disconnect all external cables before lifting or moving the chassis.
•Ensure that your footing is solid, and balance the weight of the chassis between your feet.
•Lift the chassis slowly; never move suddenly or twist your body as you lift.
•Keep your back straight and lift with your legs, not your back. If you must bend down to lift the
chassis, bend at the knees, not at the waist, to reduce the strain on your lower back muscles.
Rack-Mounting the Chassis
There are three rack-mount kits and one cable management kit available for both the Catalyst 4948E and the
Catalyst 4948E-F switch chassis. Additionally, there is one optional inlet air duct kit that is available only for
the Catalyst 4948E-F switch. Table 3-1 lists the kits and describes their contents.
The process for installing the Catalyst 4948E switch in a 19-inch rack is divided into the following
topics:
•Attaching the Rack-Mount Brackets to the Chassis, page 3-6
•Installing the Chassis in the Rack, page 3-7
•Installing the Cable Guide (Optional), page 3-8
Table 3-1 Catalyst 4948E and Catalyst 4948E-F Chassis Rack-Mount and Cable Management
Kits
Kit Part Number Description
69-2037-xx Standard rack-mount kit for both chassis. Kit includes brackets and
screws. The kit ships with the chassis as part of the accessory kit.
Installation instructions are located in this chapter.
WS-X4948E-19CNTR= Center rack-mount kit for 19-inch racks. Kit includes brackets and
screws. The kit is available as a separately orderable option. Installation
instructions are contained in a separate installation note available on
cisco.com.
WS-X4948E-23CNTR= Center rack-mount kit for 23-inch racks. Available for both chassis. Kit
includes brackets and screws. The kit is available as a separately
orderable option. Installation instructions are contained in a separate
installation note available on cisco.com.
69-1303-xx Cable management bracket kit. Kit includes the cable management
bracket and screws. The kit ships with both chassis. Installation
instructions are located in this chapter.
Panduit Corp. model CDE2 Modular ToR switch inlet air duct kit. The kit includes a switch ducting
enclosure, one switch support bracket, and installation hardware. The
kit is an option, orderable from Panduit Corp. The kit is used only when
installing the Catalyst 4948E-F switch chassis and only when installing
the chassis in a hot isle and cold isle data center environment.
Installation instructions for the kit are provided in a separate
installation note supplied with the air duct kit.

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Chapter 3 Installing the Switch
Rack-Mounting the Chassis
Attaching the Rack-Mount Brackets to the Chassis
Two rack-mount brackets are included as part of the rack-mount kit (69-2037-xx) supplied with both
switch chassis. The rack-mount brackets can be installed either on the front sides of the chassis or on the
rear sides of the chassis. The rack-mount brackets are intended for use in mounting the chassis in a
standard 19-inch (48.3 cm). This rack-mount kit is not suitable for racks with obstructions (such as
power strips) that could impair access to the switch.
Note If you are installing the Catalyst 4948E-F switch chassis in a hot isle and cold isle data center
environment and plan on using the optional modular ToR switch inlet duct kit (Panduit model CDE2),
you must install the rack-mount brackets to the front of the chassis.
To install the rack-mount brackets on the front sides of the chassis, follow these steps:
Step 1 Remove the two rack-mount brackets and eight M4 x 8 mm Phillips flat-head screws from the accessory
kit.
Step 2 Position one of the rack-mount brackets against one side of the chassis, and align the countersunk screw
holes with the M4 holes in the chassis. (See Figure 3-1.)
Note In Figure 3-1, the top view shows the rack-mount brackets being attached to the front of the chassis. The
bottom view shows the rack-mount brackets being attached to the rear of the chassis.
Step 3 Secure the rack-mount bracket to the chassis with four M4 x 8 mm Phillips flat-screws.
Step 4 Repeat Steps 2 and 3 for the second rack-mount bracket on the opposite side of the chassis.

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Chapter 3 Installing the Switch
Rack-Mounting the Chassis
Figure 3-1 Installing the Rack-Mount Brackets
Installing the Chassis in the Rack
To install the chassis in the rack, follow these steps:
Step 1 Have one person carefully lift and position the chassis in front of the rack.
Step 2 Position the chassis in the rack until the rack-mount bracket ears are in contact with the rack.
Tip Use a tape measure or a level to ensure that the chassis is installed level in the rack.
Step 3 Adjust the chassis up or down in the rack until two screw holes in each rack-mount bracket ear are
aligned with corresponding mounting holes in the equipment rack post. Place a level on top of the chassis
and verify that the chassis is not tilted in the equipment rack.
Step 4 While one person holds the chassis in place, secure the chassis to the rack with the four 10-32 x 3/4-inch
or the four 12-24 x 3/4-inch Phillips-head machine screws (two on each side) that are supplied in the
accessory kit.
1M4 screws (4 screws per bracket) 2Rack-mount bracket
2
207508
2
1
1
2
2
1
1

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Chapter 3 Installing the Switch
Rack-Mounting the Chassis
Note Figure 3-2 (top view) shows how to install a chassis in a rack when the chassis has the
rack-mount brackets attached at the front of the chassis. Figure 3-2 (bottom view) shows how to
install a chassis in a rack when the chassis has the rack-mount brackets attached at the rear of
the chassis.
Figure 3-2 Installing the Chassis in the Rack
Installing the Cable Guide (Optional)
One cable guide is provided in the accessory kit. The cable guide attaches to the rack-mount bracket
using a single M4 screw (a threaded M4 hole is provided in the rack-mount bracket). The cable guide is
designed to be used when the rack-mount brackets are attached to the front of the chassis and can be
attached to either the left side or the right side of the chassis.
Note If the chassis is mounted to the rear posts of the equipment rack, the cable guide cannot be installed.
112-24 or 10-32 screws (2 per bracket) 2Equipment rack post
207510
1
2
1
2

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Chapter 3 Installing the Switch
Rack-Mounting the Chassis
To install the cable guide, follow these steps:
Step 1 Position the cable guide in front of either the left or right rack-mount bracket.
Step 2 Attach the cable guide to either the left or right rack-mount bracket using the single M4 screw provided.
(See Figure 3-3.)
Figure 3-3 Installing the Cable Guide
Installing the Catalyst 4948E-F Switch Chassis with the Optional Panduit Air
Duct Kit
If you are installing the Catalyst 4948E-F switch chassis in a data center that is configured as hot isle
and cold isle, you might need to install the Panduit Air Duct kit, Model CDE2. The kit extends the air
intake from the rear of the chassis to the front of the equipment rack allowing the system to draw in cool
air from the cool isle. To install the air duct assembly, refer to the installation note that ships with the kit.
207511

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Chapter 3 Installing the Switch
Installing the System Ground
Installing the System Ground
The system (NEBS) ground provides additional grounding for EMI shielding requirements and is
intended to satisfy the Telcordia Technologies NEBS requirements for supplemental bonding and
grounding connections.
To connect the system ground, you need the following tools and materials:
•Ground lug—A two-hole standard 90-degree barrel lug. Supports up to 6 AWG wire.
•Ground lug screws—Two M4 x 8 mm pan-head screws.
•Ground wire—The system ground wire should be sized according to local and national installation
requirements. Depending on the power supply and system, a 12 AWG to 6 AWG copper conductor
is required for U.S. installations. We recommend that you use commercially available 6 AWG wire.
The length of the system ground wire depends on the proximity of the switch to proper grounding
facilities.
•No. 1 Phillips screwdriver.
•Wire-stripping tool to remove the insulation from the ground wire.
•Crimping tool to crimp the system ground wire to the ground lug.
Note The grounding lug and the grounding lug screws are supplied as part of the accessory kit. The grounding
wire and the tools are not supplied as part of the accessory kit.
To attach the system ground wire to the ground lug and attach the lug to the grounding pad, follow these
steps:
Step 1 If you are using insulated wire, use a wire-stripping tool to remove approximately 0.75 inch (19 mm) of
the covering from the end of the ground wire. If you are using bare wire, go to Step 2.
Step 2 Insert the stripped end of the ground wire into the open end of the ground lug.
Step 3 Crimp the ground wire in the barrel of the ground lug. Verify that the ground wire is securely attached
to the ground lug.
Step 4 Remove the yellow label covering the chassis system ground pad on the back of the chassis. (See
Figure 3-4.)
Step 5 Place the ground wire lug against the system ground pad, making sure that there is solid metal-to-metal
contact.
Step 6 Secure the ground lug to the chassis with the two M4 screws supplied in the accessory kit. (See
Figure 3-4.) Route the system ground wire ensuring that it does not interfere with other switch hardware
or rack equipment.
Step 7 Prepare the other end of the ground wire, and connect it to an appropriate earth ground point in your site
to ensure adequate earth ground for the switch.