Cisco DPC2505 User manual

October 2006
Model DPC2505 and EPC2505
Cable Modem User Guide
In This Document
IMPORTANT SAFETY INSTRUCTIONS ............................................................... 2
FCC Compliance......................................................................................................... 8
Introduction ................................................................................................................ 9
What's in the Carton?............................................................................................... 10
Front Panel Description........................................................................................... 11
Back Panel Description ............................................................................................ 12
Where Is the Best Location for My Cable Modem? ............................................. 13
What Are the System Requirements for Internet Service? ................................. 14
How Do I Set Up My High-Speed Internet Access Account? ............................ 15
How Do I Connect My Devices to Use the Internet?........................................... 16
How Do I Configure TCP/IP Protocol? ................................................................ 18
How Do I Install USB Drivers?............................................................................... 21
How Do I Mount the Cable Modem on the Wall?............................................... 23
Having Difficulty?.................................................................................................... 25
Tips for Improved Performance ............................................................................. 27
How Do I Renew the IP Address on My PC?....................................................... 28
Front Panel LED Status Indicator Functions ........................................................ 29
Notices ....................................................................................................................... 32

2 4015259 Rev C
IMPORTANT SAFETY INSTRUCTIONS
IMPORTANT SAFETY INSTRUCTIONS
Notice to Installers
The servicing instructions in this notice are for use by qualified service personnel
only. To reduce the risk of electric shock, do not perform any servicing other than
that contained in the operating instructions, unless you are qualified to do so.
20060608SICM-EN
Notice à l’attention des installateurs de réseaux câblés
Les instructions relatives aux interventions d’entretien, fournies dans la présente
notice, s’adressent exclusivement au personnel technique qualifié. Pour réduire les
risques de chocs électriques, n’effectuer aucune intervention autre que celles décrites
dans le mode d'emploi et les instructions relatives au fonctionnement, à moins que
vous ne soyez qualifié pour ce faire.
20060810SICM-FR

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IMPORTANT SAFETY INSTRUCTIONS
Mitteilung für CATV-Techniker
Die in dieser Mitteilung aufgeführten Wartungsanweisungen sind ausschließlich für
qualifiziertes Fachpersonal bestimmt. Um die Gefahr eines elektrischen Schlags zu
reduzieren, sollten Sie keine Wartungsarbeiten durchführen, die nicht ausdrücklich
in der Bedienungsanleitung aufgeführt sind, außer Sie sind zur Durchführung
solcher Arbeiten qualifiziert.
20060810SICM-GR
Aviso a los instaladores de sistemas CATV
Las instrucciones de reparación contenidas en el presente aviso son para uso
exclusivo por parte de personal de mantenimiento cualificado. Con el fin de reducir
el riesgo de descarga eléctrica, no realice ninguna otra operación de reparación
distinta a las contenidas en las instrucciones de funcionamiento, a menos que posea
la cualificación necesaria para hacerlo.
20060810SICM-SP

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IMPORTANT SAFETY INSTRUCTIONS
Heed All Warnings
Adhere to all warnings on the product and in the operating instructions.
Read, Retain, and Follow These Instructions
Carefully read all safety and operating instructions before operating this product. Follow all
operating instructions that accompany this product. Retain the instructions for future use.
Give particular attention to all safety precautions.
Comply with Warnings
Avoid electric shock. Comply with all warnings and cautions in the operating instructions, as
well as those that are affixed to this product.
Power Warnings
Providing a Power Source
A label on this product indicates the correct power source for this product. Operate this
product only from an electrical outlet with the voltage and frequency indicated on the
product label.
If you are uncertain of the type of power supply to your home or business, consult your
service provider or your local power company.
Grounding This Product (U.S.A. and Canada Only)
WARNING:
Avoid electric shock and fire hazard! Do not defeat the safety purpose of the
polarized or grounding-type plug. A polarized plug has two blades with one
wider than the other. A grounding-type plug has two blades and a third
grounding prong. The wide blade or the third prong is provided for your
safety. If the provided plug does not fit into your outlet, consult an electrician
for replacement of the obsolete outlet.
If this product is equipped with either a three-prong (grounding pin) safety plug or a two-
prong (polarized) safety plug, do not defeat the safety purpose of the polarized or
grounding-type plug. Follow these safety guidelines to properly ground this product:
For a 3-prong plug (consists of two blades and a third grounding prong), insert the plug
into a grounded mains, 3-prong outlet.
Note: This plug fits only one way. The grounding prong is provided for your safety. If
you are unable to insert this plug fully into the outlet, contact your electrician to replace
your obsolete outlet.
For a 2-prong plug (consists of one wide blade and one narrow blade), insert the plug
into a polarized mains, 2-prong outlet in which one socket is wider than the other.
Note: If you are unable to insert this plug fully into the outlet, try reversing the plug. The
wide blade is provided for your safety. If the plug still fails to fit, contact an electrician to
replace your obsolete outlet.

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IMPORTANT SAFETY INSTRUCTIONS
Overloading
WARNING:
Avoid electric shock and fire hazard! Do not overload mains AC outlets and
extension cords. For products that require battery power or other power
sources to operate them, refer to the operating instructions for those products.
Do not overload electrical outlets, extension cords, or integral convenience receptacles as this
can result in a risk of fire or electric shock. For products that require battery power or other
sources to operate, refer to the operating instructions for that product.
Preventing Power Cord Damage
Protect the power cord from being walked on or pinched, particularly at plugs, convenience
receptacles, and the point where they exit from the apparatus. Arrange all power cords so
that pets cannot walk on or disturb the cords. Do not place objects on or lean objects against
the cords, which can damage the cords.
Usage Warnings
Providing Ventilation
Do not block any ventilation openings. Install in accordance with the manufacturer's
instructions.
Do not place this apparatus on a bed, sofa, rug, or similar surface.
Do not install near any heat sources such as radiators, heat registers, stoves, or other
apparatus (including amplifiers) that produce heat.
Do not install this apparatus in an enclosure, such as a bookcase or rack, unless the
installation provides proper ventilation.
Do not place entertainment devices (such as VCRs or DVDs), lamps, books, vases with
liquids, or other objects on top of this product.
Do not use this apparatus near water.
Selecting a Proper Location
WARNING:
Avoid personal injury and damage to this product! An unstable surface may
cause this product to fall.
Place this product on a stable surface. The surface must support the size and weight of this
product. Any mounting accessory used must be recommended by the manufacturer. The
product should be mounted to a wall or ceiling only as recommended by the manufacturer.
Important! The power cord is the mains power supply disconnect device.
Place this product in a location that is close enough to an electrical outlet and where the
power cord is easily accessible to be disconnected from the wall outlet or from the rear panel
of the product.

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IMPORTANT SAFETY INSTRUCTIONS
Cleaning This Product
WARNING:
Avoid electric shock! Unplug this product before cleaning. Clean only with a
dry cloth.
Before cleaning this product, unplug it from the electrical outlet. Clean this product only with
a dry cloth. Do not use a liquid cleaner or an aerosol cleaner. Do not use a magnetic/static
cleaning device (dust remover) to clean this product.
Protecting This Product from Foreign Objects and Water or Moisture Damage
WARNING:
Avoid electric shock and fire hazard! Never push objects through the
openings in this product. Foreign objects can cause electrical shorts that can
result in electric shock or fire. Do not expose this product to rain or moisture.
Do not place objects filled with liquid, such as vases, on this product.
Never push objects of any kind into this product through openings as they may touch
dangerous voltage points or short out parts that could result in a fire or electric shock.
Do not expose this product to liquids or moisture. Do not place this product on a wet surface.
Do not spill liquids on or near this product.
Do not use this product near water (such as a bathtub, washbowl, sink, or laundry tub), in a
wet basement, or near a swimming pool.
Accessories Warnings
WARNING:
Avoid any potential for electric shock or fire. Only use
attachments/accessories specified by the manufacturer.
Do not use accessories or attachments with this product unless recommended by your service
provider or manufacturer.
Service Warnings
Servicing This Product
WARNING:
Avoid electric shock! Opening or removing the cover may expose you to
dangerous voltages. This product contains no user-serviceable parts. Refer all
servicing to qualified service personnel.
Do not open the cover of this product. If you open the cover, your warranty will be void.
Refer all servicing to qualified personnel only. Contact your service provider for instructions.

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IMPORTANT SAFETY INSTRUCTIONS
Obtaining Service for Product Damage
For damage that requires service, unplug this product from the AC outlet. Refer all servicing
to your service provider or qualified service personnel. Servicing is required when:
The apparatus has been damaged in any way
A power-supply cord or plug is damaged
Liquid has been spilled or objects have fallen into the apparatus
The apparatus has been exposed to rain or moisture
The apparatus does not operate normally
The apparatus has been dropped
Checking Product Safety
Upon completion of any service or repairs to this product, the service technician must
perform safety checks to determine that this product is in proper operating condition.
Lightning
For added protection, unplug this apparatus during lightning storms or when unused for
long periods of time. In addition to disconnecting the AC power from the wall outlet,
disconnect the signal inputs. This may prevent damage to the apparatus due to lightning and
power-line surges. Plugging this apparatus into a surge protector may reduce the risk of
damage.
20060712MDBN

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FCC Compliance
FCC Compliance
United States FCC Compliance
This device has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against such interference in a residential installation. This equipment generates,
uses, and can radiate radio frequency energy. If not installed and used in accordance with the
instructions, it may cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television reception, which can be determined by
turning the equipment OFF and ON, the user is encouraged to try to correct the interference
by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
Consult the cable company or an experienced radio/television technician for help.
Any changes or modifications not expressly approved by Cisco Systems, Inc., could void the
user's authority to operate the equipment.
The information shown in the FCC Declaration of Conformity paragraph below is a
requirement of the FCC and is intended to supply you with information regarding the FCC
approval of this device. The phone numbers listed are for FCC-related questions only and not
intended for questions regarding the connection or operation for this device. Please contact your
service provider for any questions you may have regarding the operation or installation of this device.
Declaration of Conformity
This device complies with Part 15 of FCC
Rules. Operation is subject to the following two
conditions: 1) the device may not cause
harmful interference, and 2) the device must
accept any interference received, including
interference that may cause undesired
operation.
Data Cable Modem
DPC2505 and EPC2505
Manufactured by:
Cisco Systems, Inc.
5030 Sugarloaf Parkway
Lawrenceville, Georgia 30044 USA
Telephone: [phone]
Canada EMI Regulation
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la class B est conforme à la norme NMB-003 du Canada.
20060628FDC

4015259 Rev C 9
Introduction
Introduction
Welcome to the exciting world of high-speed Internet access. You have acquired one
of the fastest cable modems available on the market today. Your new Model
DPC2505 or Model EPC2505 Wideband Cable Modem offers high-end performance
and unsurpassed reliability at data rates up to three times that of conventional
DOCSIS 2.0 (DPC2505) and EuroDOCSIS (EPC2505) cable modems. With your new
DPC2505 or EPC2505, your Internet enjoyment and business productivity will surely
soar.
This guide provides procedures and recommendations for placing, installing,
configuring, operating, and troubleshooting your DPC2505 or EPC2505.
Benefits and Features
Your new DPC2505 or EPC2505 offers the following additional outstanding benefits
and features:
Provides a high-speed broadband Internet connection that energizes your online
experience, which makes downloading and sharing files and photos with your
family and friends hassle free
Features Plug and Play operation for easy set up and installation
Offers a Gigabit Ethernet port supporting both Gigabit and 10/100BaseT speeds
Includes both a USB 2.0 data port that is backwards compatible with USB 1.1
Supports up to 64 users (1 USB port and up to 63 users on user-supplied Ethernet
hubs)
Utilizes vertical or horizontal placement
Allows automatic software upgrades by your service provider
Ensures interoperability with most service providers by complying with the
following specifications:
-DPC2505—DOCSIS 2.0 and backward compatibility for operation in DOCSIS
1.1 and DOCSIS 1.0 networks
-EPC2505—EuroDOCSIS 2.0 and backward compatibility for operation in
EuroDOCSIS 1.1 and EuroDOCSIS 1.0 networks

10 4015259 Rev C
What's in the Carton?
What's in the Carton?
When you receive your cable modem, you should check the equipment and
accessories to verify that each item is in the carton and that each item is undamaged.
The carton contains the following items:
One Model DPC2505 or
EPC2505 Cable Modem
One Ethernet cable
(CAT5/RJ-45)
One power adapter with power
cord
One USB cable (not included
with all models)
One CD-ROM containing the
user's guide and the USB drivers
If any of these items are missing or damaged, please contact your service provider
for assistance.
Note: You will need an optional cable signal splitter and additional standard RF
coaxial cables if you want to connect a VCR, a Digital Home Communications
Terminal (DHCT) or a set-top converter, or a TV to the same cable connection as
your cable modem.

4015259 Rev C 11
Front Panel Description
Front Panel Description
The front panel of your cable modem provides LED status indicators that indicate
how well and at what state your cable modem is operating. After the cable modem is
successfully registered on the network, the POWER and ONLINE LED status
indicators illuminate continuously to show that the cable modem is active and fully
operational. See Front Panel LED Status Indicator Functions (on page 29) for more
information on front panel LED status indicator functions.
1POWER—Illuminates solid green to indicate that power is
being applied to the cable modem
2DS 1 (Downstream LED 1)—Illuminates solid green to indicate
that the cable modem is locked onto the downstream signal or
blinks to indicate that the cable modem is scanning for the
downstream signal
DS 2-3 (Downstream LEDs 2-3)—Off while the cable modem is
connecting to the network, after connecting, illuminate solid
green to indicate wideband operation, and Off if no wideband
channels are found
3US (Upstream)—Off when no upstream connectivity is present,
illuminates solid green to indicate the upstream connection is
operational, blinks to indicate that upstream calibration is in
progress and during registration with the system. Off when the
modem is off-line.
4ONLINE—Illuminates solid green when the cable modem is
registered on the network and fully operational
5LINK—Off when no Ethernet/USB device is present,
illuminates solid green to indicate that an Ethernet/USB device
is connected, and blinks to indicate that Ethernet/USB data is
being transferred between the PC and the cable modem
Note: After the cable modem is successfully registered on the
network, the POWER (LED 1) and ONLINE (LED 4) indicators
illuminate continuously to indicate that the cable modem is
online and fully operational.

12 4015259 Rev C
Back Panel Description
Back Panel Description
The following illustration describes the back panel components of the DPC2505 and
EPC2505 wideband cable modems.
1POWER 12VDC—Connects the cable modem to the DC output of the AC
power adapter that is provided with your cable modem. Only use the AC
power adapter and power cord that is provided with your cable modem
CAUTION:
Avoid damage to your equipment. Only use the AC
power adapter and power cord that is provided with
your cable modem.
2ETHERNET—RJ-45 Gigabit Ethernet port connects to the Ethernet port
on your PC
3RESET—Reset-to-Default button (Factory Reset)
Note: This button is for maintenance purposes only. Do not use unless
told to do so by your service provider.
4USB—USB 2.0 port connects to the USB port on your PC
5CABLE—F-Connector connects to an active cable signal from your
service provider

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Where Is the Best Location for My Cable Modem?
Where Is the Best Location for My Cable Modem?
The ideal location for your cable modem is where it has access to outlets and other
devices. Think about the layout of your home or office, and consult with your
service provider to select the best location for your cable modem. Read this user's
guide thoroughly before you decide where to place your cable modem.
Consider these recommendations:
Position your PC and cable modem so that they are located near an AC power
outlet.
Position your PC and cable modem so that they are located near an existing cable
input connection to eliminate the need for an additional cable outlet. There
should be plenty of room to guide the cables away from the modem and the PC
without straining or crimping them.
Airflow around the cable modem should not be restricted.
Choose a location that protects the cable modem from accidental disturbance or
harm.

14 4015259 Rev C
What Are the System Requirements for Internet Service?
What Are the System Requirements for Internet Service?
To ensure that your cable modem operates efficiently for high-speed Internet service,
verify that all of the Internet devices on your system meet or exceed the following
minimum hardware and software requirements.
Note: You will also need an active cable input line and an Internet connection.
Minimum System Requirements for a PC
A PC with a Pentium MMX 133 processor or greater
32 MB of RAM
Web browsing software
CD-ROM drive
Minimum System Requirements for Macintosh
MAC OS 7.5 or later
32 MB of RAM
System Requirements for an Ethernet Connection
A PC with Microsoft Windows 95 operating system (or later) with TCP/IP
protocol installed, or an Apple Macintosh computer with TCP/IP protocol
installed
An active Gigabit Ethernet or 10/100BaseT Ethernet network interface card
(NIC) installed
System Requirements for a USB Connection
A PC with Microsoft Windows 2000 or Windows XP operating system
A master USB port installed in your PC

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How Do I Set Up My High-Speed Internet Access Account?
How Do I Set Up My High-Speed Internet Access Account?
Before you can use your cable modem, you need to have a high-speed Internet
access account. If you do not have a high-speed Internet access account, you need to
set up an account with your local service provider. Choose one of the two options in
this section.
I Do Not Have a High-Speed Internet Access Account
If you do not have a high-speed Internet access account, your service provider will
set up your account and become your Internet Service Provider (ISP). Internet access
enables you to send and receive e-mail, access the World Wide Web, and receive
other Internet services.
You will need to give your service provider the following information:
The serial number of the modem
The Media Access Control (MAC) address of the modem
These numbers appear on a bar code label located on the cable modem. The serial
number consists of a series of alphanumeric characters preceded by S/N. The MAC
address consists of a series of alphanumeric characters preceded by CM MAC. The
following illustration shows a sample bar code label.
Write down these numbers in the space provided here.
Serial Number _______________________
MAC Address ________________________
I Already Have an Existing High-Speed Internet Access Account
If you have an existing high-speed Internet access account, you must give your
service provider the serial number and the MAC address of the cable modem. Refer
to the serial number and MAC address information listed previously in this section.
Note: You may not be able to continue to use your existing e-mail account with your
cable modem. Contact your service provider for more information.

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How Do I Connect My Devices to Use the Internet?
How Do I Connect My Devices to Use the Internet?
You can use your cable modem to access the Internet, and you can share that
Internet connection with other Internet devices in your home or office. Sharing one
connection among many devices is called networking.
Connecting and Installing Internet Devices
You must connect and install your cable modem to access the Internet. Professional
installation may be available. Contact your local service provider for further
assistance.
To connect devices
The following diagram illustrates one of the various networking options that are
available to you.

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How Do I Connect My Devices to Use the Internet?
Connecting the Modem for High-Speed Data Service
WARNING:
To avoid personal injury or damage to your equipment, follow these steps in
the exact order shown.
1Power off your PC and unplug it from the power source.
2Connect your PC to either the ETHERNET port or the USB port using the
appropriate data cable. Do not connect your PC to both the Ethernet and USB
ports at the same time. You can connect two separate PCs to the cable modem at
the same time by connecting one PC to the Ethernet port and one PC to the USB
port.
3Connect the active RF coaxial cable to the CABLE connector. Use an optional
cable signal splitter to add a TV, a DHCT or set-top converter, or a VCR.
4Insert the AC power cord into the POWER connector on the back of the cable
modem, and then plug the cord into an AC power source.
5Plug in and power on your networked devices including your PC. The cable
modem will then begin an automatic search to locate and sign on to the
broadband data network. This process may take up to 5 minutes. The modem
will be ready for use when the ONLINE LED status indicator on the front panel
stops blinking and illuminates continuously.
6The next step in setting up your cable modem is to configure your Internet
devices for Internet access. Choose one of the following options:
If you want to use Ethernet connections, you must configure the TCP/IP
protocol. To configure the TCP/IP protocol, go to How Do I Configure
TCP/IP Protocol? (on page 18).
If you want to use USB connections, you must install the USB drivers. To
install the USB Drivers for USB, go to How Do I Install USB Drivers?
(on page 21).

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How Do I Configure TCP/IP Protocol?
How Do I Configure TCP/IP Protocol?
To configure TCP/IP protocol, you need to have an Ethernet Network Interface Card
(NIC) with TCP/IP communications protocol installed on your system. TCP/IP is a
communications protocol used to access the Internet. This section contains
instructions for configuring TCP/IP on your Internet devices to operate with the
cable modem in Microsoft Windows or Macintosh environments.
Configuring TCP/IP on Your Internet Devices
TCP/IP protocol in a Microsoft Windows environment is different for each
operating system. Follow the appropriate instructions in this section for your
operating system.
Configuring TCP/IP on Windows 95, 98, 98SE, or ME Systems
1Click Start, select Settings, and choose Control Panel.
2Double-click the Network icon in the Control Panel window.
3Read the list of installed network components under the Configuration tab to
verify that your PC contains the TCP/IP protocol/Ethernet adapter.
4Is TCP/IP protocol listed in the installed network components list?
If yes, go to step 7.
If no, click Add, click Protocol, click Add, and then go to step 5.
5Click Microsoft in the Manufacturers list.
6Click TCP/IP in the Network Protocols list, and then click OK.
7Click the TCP/IP Ethernet Adapter protocol, and then choose Properties.
8Click the IP Address tab, and then select Obtain an IP address automatically.
9Click the Gateway tab and verify that these fields are empty. If they are not
empty, highlight and delete all information from the fields.
10 Click the DNS Configuration tab, and then select Disable DNS.
11 Click OK.
12 Click OK when the system finishes copying the files, and then close all
networking windows.
13 Click YES to restart your computer when the System Settings Change dialog box
opens. The computer restarts. The TCP/IP protocol is now configured on your
PC, and your Ethernet devices are ready for use.
14 Try to access the Internet. If you cannot access the Internet, go to Having
Difficulty? (on page 25). If you still cannot access the Internet, contact your
service provider for further assistance.

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How Do I Configure TCP/IP Protocol?
Configuring TCP/IP on Windows 2000 Systems
1Click Start, select Settings, and choose Network and Dial-up Connections.
2Double-click the Local Area Connection icon in the Network and Dial-up
Connections window.
3Click Properties in the Local Area Connection Status window.
4Click Internet Protocol (TCP/IP) in the Local Area Connection Properties
window, and then click Properties.
5Select both Obtain an IP address automatically and Obtain DNS server address
automatically in the Internet Protocol (TCP/IP) Properties window, and then
click OK.
6Click Yes to restart your computer when the Local Network window opens. The
computer restarts. The TCP/IP protocol is now configured on your PC, and your
Ethernet devices are ready for use.
7Try to access the Internet. If you cannot access the Internet, go to Having
Difficulty? (on page 25). If you still cannot access the Internet, contact your
service provider for further assistance.
Configuring TCP/IP on Windows XP Systems
1Click Start, and depending on your Start menu setup, choose one of the
following options:
If you are using the Windows XP Default Start Menu, select Connect to,
choose Show all connections, and then go to step 2.
If you are using the Windows XP Classic Start Menu, select Settings, choose
Network Connections, click Local Area Connection, and then go to step 3.
2Double-click the Local Area Connection icon in the LAN or High-Speed Internet
section of the Network Connections window.
3Click Properties in the Local Area Connection Status window.
4Click Internet Protocol (TCP/IP), and then click Properties in the Local Area
Connection Properties window.
5Select both Obtain an IP address automatically and Obtain DNS server address
automatically in the Internet Protocol (TCP/IP) Properties window, and then
click OK.
6Click Yes to restart your computer when the Local Network window opens. The
computer restarts. The TCP/IP protocol is now configured on your PC, and your
Ethernet devices are ready for use.
7Try to access the Internet. If you cannot access the Internet, go to Having
Difficulty? (on page 25). If you still cannot access the Internet, contact your
service provider for further assistance.

20 4015259 Rev C
How Do I Configure TCP/IP Protocol?
Configuring TCP/IP on Macintosh Systems
1Click the Apple icon in the upper-left corner of the Finder. Scroll down to
Control Panels, and then click TCP/IP.
2Click Edit on the Finder at the top of the screen. Scroll down to the bottom of the
menu, and then click User Mode.
3Click Advanced in the User Mode window, and then click OK.
4Click the Up/Down selector arrows located to the right of the Connect Via
section of the TCP/IP window, and then click Using DHCP Server.
5Click Options in the TCP/IP window, and then click Active in the TCP/IP
Options window.
Note: Make sure that the Load only when needed option is unchecked.
6Verify that the Use 802.3 option located in the upper-right corner of the TCP/IP
window is unchecked. If there is a check mark in the option, uncheck the option,
and then click Info in the lower-left corner.
7Is there a Hardware Address listed in this window?
If yes, click OK. To close the TCP/IP Control Panel window, click File, and
then scroll down to click Close. You have completed this procedure.
If no, you must power off your Macintosh.
8With the power off, simultaneously press and hold down the Command
(Apple), Option, P, and Rkeys on your keyboard. Keeping those keys pressed
down, power on your Macintosh but do not release these keys until you hear the
Apple chime at least three times, then release the keys and let the computer
restart.
9When your computer fully reboots, repeat steps 1 through 7 to verify that all
TCP/IP settings are correct. If your computer still does not have a Hardware
Address, contact your authorized Apple dealer or Apple technical support center
for further assistance.