This chapter describes the safety instructions and site requirements needed for installing the Cisco ESSE and helps you prepare for installation. It contains the following major sections:

Required Tools and Equipment

You need the following tools and equipment to install the Cisco ESSE:

Console cable
Power cord
Number 2 Phillips screwdriver
Tape measure and level
Antistatic mat or antistatic foam
Electro-static discharge grounding strap
Two Ethernet cables

Rack-mount kit:

Two chassis-support brackets

Two rack-mount brackets

Six screws threaded appropriately for your rack

Safety

This section provides safety information you will need when installing this product.

Read "Installing and Configuring the Cisco ESSE," before you connect the system to its power source. Failure to read and follow these guidelines could lead to an unsuccessful installation and possible damage to the system and components.

You should observe the following safety warnings when working with any equipment that connects to electrical power or telephone wiring. They can help you avoid injuring yourself and damaging the Cisco ESSE.

The following warnings and cautions are provided to help you prevent damage to the devices or injury to yourself:

Warning This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents.

Warning The safety cover is an integral part of the product. Do not operate the unit without the safety cover installed. Operating the unit without the cover in place will invalidate the safety approvals and pose a risk of fire and electrical hazards.

Warning 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.

Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units.

Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact with telephone-network voltages.

Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Make sure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S. and 240 VAC, 10A international are used on the phase conductors (all current-carrying conductors).

Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use.

Warning Blank faceplates and cover panels serve three important functions: they prevent exposure to hazardous voltages and currents inside the chassis; they contain electromagnetic interference (EMI) that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not operate the system unless all cards, faceplates, front covers, and rear covers are in place.

Warning Do not work on the system or connect or disconnect cables during periods of lightning activity.

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.

Warning Ultimate disposal of this product should be handled according to all national laws and regulations.

Warning Before working on a system that has an On/Off switch, turn OFF the power and unplug the power cord.

Warning Read the installation instructions before you connect the system to its power source.

Warning The ports labeled "10BaseT," "100BaseTX," and "10/100" are safety extra-low voltage (SELV) circuits. SELV circuits should only be connected to other SELV circuits. Avoid connecting these circuits to telephone network voltage (TNV) circuits.

Warning There is the danger of explosion if the battery is replaced incorrectly. Replace the battery only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions.

Warning The device is designed to work with TN power systems.

General Precautions

Observe the following general precautions when using and working with your system:

Keep your system components away from radiators and heat sources, and do not block cooling vents.
Do not spill food or liquids on your system components, and never operate the product in a wet environment. If the computer gets wet, see the appropriate chapter in your troubleshooting guide or contact the Cisco Technical Assistance Center. For instructions on contacting the Technical Assistance Center, see the "Obtaining Technical Assistance" section.
Do not push any objects into the openings of your system components. Doing so can cause fire or electric shock by short-circuiting interior components.
Position system cables and power cables carefully; route system cables and the power cable and plug so that they cannot be stepped on or tripped over. Be sure that nothing rests on your system components' cables or power cable.
Do not modify power cables or plugs. Consult a licensed electrician or your power company for site modifications. Always follow your local/national wiring rules.
To help avoid possible damage to the system board, wait 5 seconds after turning off the system before removing a component from the system board or disconnecting a peripheral device from the computer.

Maintaining Safety with Electricity

Follow these guidelines when working on equipment powered by electricity:

If any of the following conditions occurs contact the Cisco Technical Assistance Center:

The power cable, extension cable, or plug is damaged.
An object has fallen into the product.
The product has been exposed to water.
The product has been dropped or damaged.
The product does not operate correctly when you follow the operating instructions.

Use the correct external power source. Operate the product only from the type of power source indicated on the electrical ratings label. If you are not sure of the type of power source required, consult the Cisco Technical Assistance Center or a local power company.
Use only approved power cable(s). If you have not been provided with a power cable for your computer or storage system or for any AC-powered option intended for your system, purchase a power cable that is approved for use in your country. The power cable must be rated for the product and for the voltage and current marked on the product's electrical ratings label. The voltage and current rating of the cable should be greater than the ratings marked on the product.
To help prevent electric shock, plug the Cisco ESSE, components, and peripheral power cables into properly grounded electrical outlets. These cables are equipped with three-prong plugs to help ensure proper grounding. Do not use adapter plugs or remove the grounding prong from a cable. If you must use an extension cable, use a three-wire cable with properly grounded plugs.
Observe extension cable and power strip ratings. Make sure that the total ampere rating of all products plugged into the extension cable or power strip does not exceed 80 percent of the extension cable with properly grounded plugs.
To help protect your system/components from sudden, transient increases and decreases in electrical power, use a surge suppressor, line conditioner, or uninterruptable power supply (UPS).
Do not modify power cables or plugs. Consult a licensed electrician or your power company for site modifications. Always follow your local/national wiring rules.

Protecting Against Electrostatic Discharge

Static electricity can harm delicate components inside your computer. To prevent static damage, discharge static electricity from your body before you touch any of your computer's electronic components, such as the microprocessor. You can do so by touching an unpainted metal surface on the computer chassis.

As you continue to work inside the computer, periodically touch an unpainted metal surface to remove any static charge your body may have accumulated.

You can also take the following steps to prevent damage from electrostatic discharge (ESD):

When unpacking a static-sensitive component from its shipping carton, do not remove the component from the antistatic packing material until you are ready to install the component in your computer. Just before unwrapping the antistatic packaging, be sure to discharge static electricity from your body.
When transporting a sensitive component, first place it in an antistatic container or packaging.
Handle all sensitive components in a static-safe area. If possible, use antistatic floor pads and workbench pads.

Preventing Electromagnetic Interference

When you run wires for any significant distance in an electromagnetic field, electromagnetic interference (EMI) can occur between the field and the signals on the wires.

Note the following:

Bad plant wiring can result in radio frequency interference (RFI).
Strong EMI, especially when it is caused by lightning or radio transmitters, can destroy the signal drivers and receivers in the system, and can even create an electrical hazard by conducting power surges through lines and into the system.

To predict and remedy strong EMI, consult RFI experts.

Preparing Your Site for Installation

This section describes the requirements your site must meet for safe installation and operation of your Cisco ESSE. Ensure that your site is properly prepared before beginning installation.

Environmental

When planning your site layout and equipment locations, keep in mind the information provided in this section to help avoid equipment failures and reduce the possibility of environmentally caused shutdowns. If you are currently experiencing shutdowns or unusually high errors with your existing equipment, the precautions listed below will help you isolate the cause of failures and prevent future problems:

To avoid damage to equipment, always follow the ESD-prevention procedures described in the "Preventing Electromagnetic Interference" section. Damage from static discharge can cause immediate or intermittent equipment failure.
Make sure that the chassis cover is secure. The chassis is designed to allow cooling air to flow effectively within it. An open chassis allows air leaks, which could interrupt and redirect the flow of cooling air from internal components.
Make sure that the room in which you operate has adequate air circulation. Electrical equipment generates heat. Ambient air temperature might not be adequate to cool equipment to acceptable operating temperatures without adequate circulation.

Choosing a Site for Installation

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.

Choose a site with a dry, clean, well-ventilated and air-conditioned area.
Choose a site that maintains an ambient temperature of 10° to 35°C (50° to 95°F).

Grounding the System

Creating a Safe Environment

Follow these guidelines to create a safe operating environment:

Keep tools and chassis components off the floor and away from foot traffic.
Clear the area of possible hazards, such as damp floors, ungrounded power extension cables, and missing safety grounds.
Keep the area around the chassis free from dust and foreign conductive material (such as metal flakes from nearby construction activity).

AC Power

Warning The plug-socket combination must be accessible at all times because it serves as the main disconnecting device.

For Cisco ESSE power requirements, see "Technical Specifications."

Cabling

Use the cables in the accessory kit to connect the Cisco ESSE console port to a console or computer that is running a console program. In addition to the console cable, you must supply your own standard Ethernet cable to connect the Cisco ESSE to your network. For information detailing cable requirements, see the "Network Cable Requirements" section.

A structured wiring system provides a standardized way to wire a building for all types of networks for the Cisco ESSE to be installed. The main distribution frame links all of the building's interior wiring and provides an interface connection to circuits coming from outside sources such as the local telephone company. Wiring hubs (peripherals for cabling installations) provide the connection logic unique to Fast Ethernet cables that the Cisco ESSE uses. Unshielded twisted pair (UTP) copper wire is used to connect the Cisco ESSE and distributes the network connections to wall jacks near each piece of network equipment.

Precautions for Rack-Mounting

Observe the following precautions for rack stability and safety. Also, refer to the rack installation documentation accompanying the rack for specific warning and/or caution statements and procedures.

Note Servers, storage systems, and appliances are considered components in a rack. Thus, component refers to any server, storage system, or appliance, as well as to various peripherals or supporting hardware.

Do not move large racks by yourself. Due to the height and weight of the rack, at least two people are needed to accomplish this task.
Ensure that the rack is level and stable before extending a component from the rack.
Do not overload the AC supply branch circuit that provides power to the rack. The total rack load should not exceed 80 percent of the branch circuit rating.
Ensure that proper airflow is provided to components in the rack.
Do not step on or stand on any system/component when servicing other system/components in a rack.
A component should be mounted at the bottom of the rack if it is the only unit in the rack.
When mounting components 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.

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.

Precautions for Products with Modems, Telecommunications, or LAN Options

Observe the following guidelines when working with options:

Do not connect or use a modem or telephone during a lighting storm. You will be at risk of electrical shock from lightning.
Never connect or use a modem or telephone in a wet environment.
Do not plug a modem or telephone cable into the Ethernet connector.
Disconnect the modem cable before opening a product enclosure, touching or installing internal components, or touching an uninsulated modem cable or jack.
Do not use a telephone line to report a gas leak while you are in the vicinity of the leak.

Setting Up the Layer 2 Network

As part of the installation process, you must configure your Cisco ESSE. During this process, you are prompted to enter information for the two Ethernet interface ports. Ethernet 0 is used for IP communications, and Ethernet 1 is used for L2NMP management packet communications.

The IP interface is used for IP-based web-server-to-web-browser communications and can be physically isolated to a separate LAN, if you wish.

The L2NMP interface is used to exchange management packets with Cisco ONT 1031 devices located throughout the layer 2 network.

General notes on network configuration are provided in Table 2-1. An example of a Layer 2 network showing a Cisco ESSE is shown in Figure 2-1.

Table 2-1: Network Configuration Notes

Device Type	Tasks
All	Upgrade your network device software to the supported versions. Verify connectivity from the Cisco ESSE to the devices you want to manage. Optional: Enable CDP. Set unique sysName variable. Configure DNS server.
Catalyst 4000 switches	Disable port negotiation on all switch ports used for Cisco ONT 1031 network connectivity Set up VLANs

Device Type

Tasks

All

Upgrade your network device software to the supported versions.
Verify connectivity from the Cisco ESSE to the devices you want to manage.

Optional:

Enable CDP.
Set unique sysName variable.
Configure DNS server.

Catalyst 4000 switches

Disable port negotiation on all switch ports used for Cisco ONT 1031 network connectivity
Set up VLANs

Figure 2-1: Sample Layer 2 Network

The Cisco ESSE to Cisco ONT 1031 network switching fabric for the L2NMP interface is based on communicating at the Layer 2 level. The network switching fabric may either be configured on a single VLAN or as IEEE 802.1q trunks with appropriate VLANs.

Configuring VLANs

If the network switching fabric is configured as a single VLAN, L2NMP management traffic and the Cisco ONT 1031 subscriber traffic will share this single VLAN. The Cisco ESSE L2NMP interface, for L2NMP management packet exchange, can potentially become overloaded due to excessive packet processing of the additional end user traffic or other high traffic source or surge (i.e., flooding or, potentially, the end user data) causing disruption of L2NMP management packet exchange. When the high traffic recedes, L2NMP packet communication resumes.

To avoid this potential issue, logically separate these two traffic streams by implementing the appropriate IEEE 802.1q trunk and VLAN configurations across your network.

L2NMP packets generated by Cisco ONT 1031 devices are without VLAN tags and will be placed onto the native VLAN (as required by IEEE 802.1q). Therefore, if you are distributing Cisco ONT 1031s across multiple VLANS in your network, each Cisco ONT 1031 network access port must be defined as a trunk and must contain the appropriate native VLAN and the second non-native VLAN for end user traffic. If you clear all other unnecessary VLANs from this trunk definition, traffic on this trunk will be kept to a minimum.

The network access port on the Cisco ESSE L2NMP interface therefore must also be defined as a trunk and contain all native VLANs from all Cisco ONT 1031 network access port trunk definitions. To prevent excess packet processing on the Cisco ESSE L2NMP interface, clear all extraneous VLANs from this trunk.

If all Cisco ONT 1031 access ports in the network are in the same native VLAN, the L2NMP interface's access port needs only to be in this same native VLAN and does not have to be defined as a trunk. To prevent excess packet processing on the Cisco ESSE L2NMP interface, ensure all the Cisco ONT 1031 network access ports and the Cisco ESSE L2NMP interface are the only devices on this native VLAN.

To separate these two traffic streams, verify that the customer premises equipment (CPE) subscriber side port is IEEE 802.1q compliant, defined as a trunk, and has the same native VLAN and end user VLANs defined.

For more information on configuring VLANs on the Catalyst 4000, refer to the software configuration guide for the Catalyst 4000. The relevant section is also online at

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/rel7_1/config/vlans.htm

For more information on configuring VLAN trunks on the Catalyst 4000, refer to the software configuration guide for the Catalyst 4000. The relevant section is also online at

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/rel7_1/config/e_trunk.htm

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