Preparing for Installation
This chapter provides specific information about preparing your site for the installation of the Cisco XR 12406 Router. The following sections are included in this chapter:
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Installation Site Requirements
•Unpacking and Repacking the Router
•Transporting a Cisco XR 12000 Series Router
Before installing a Cisco XR 12406 Router, you should have the following information:
•Power and cabling requirements that must be in place at your installation site
•Equipment you will need to install the router
•Environmental conditions your installation site must meet to maintain normal operation
Note Do not unpack the router until you are ready to install it.
Tools and Equipment
The Cisco XR 12406 Router can be installed with a minimum number of tools. The following tools are required:
•1/4-inch and 3/16-inch flat-blade screwdrivers
•9/16-inch wrench
•10-mm wrench (either open-end or socket)
•2-mm allen wrench
•ESD-preventive wrist strap
•Antistatic mat
•Tape measure
•Wire cutters
•Pliers
Safety and Compliance
The following guidelines help to ensure your safety and protect the equipment. This section does not include every potentially hazardous situation, so be alert.
•Compliance and Safety Information
General Safety Guidelines
The following are some general safety guidelines you should be aware of when installing or maintaining the Cisco XR 12406 Router.
•Never attempt to lift an object that might be too heavy for you to lift by yourself.
Caution
Do not attempt to
lift the chassis by the blower module handle. The blower module handle is intended for lifting the blower module only when it is disconnected from the chassis.
•Always disconnect the power source and unplug all power cables before lifting, moving, or working on the router.
•Keep the work area clear and dust free during and after installation.
•Keep tools and router components away from walkways and equipment rack aisles.
•Do not wear loose clothing, jewelry (including rings and chains), or other items that could get caught in the router.
•Fasten your tie or scarf and sleeves.
•Cisco equipment operates safely when it is used in accordance with its electrical ratings and product usage instructions.
•Do not work alone if potentially hazardous conditions exist.
•Always unplug the power cables when performing maintenance or working on the router, unless the replacement part is hot swappable and designed for online insertion and removal (OIR).
•The installation of the router should be in compliance with national and local electrical codes: in the United States, National Fire Protection Association (NFPA) 70, United States National Electrical Code; in Canada, Canadian Electrical Code, part I, CSA C22.1; in other countries, International Electrotechnical Commission (IEC) 364, part 1 through part 7.
•Before installing, configuring, or maintaining the router, review the safety warnings listed in the Regulatory Compliance and Safety Information for the Cisco 12000 Series Router that accompanied your router.
•A Cisco XR 12406 Router with an AC power distribution unit (PDU) and AC-input power supplies are shipped with AC power cords equipped with three-wire electrical grounding-type plugs that will fit into only a grounding-type power outlet. This is a safety feature. The equipment grounding should be in accordance with local and national electrical codes.
•A Cisco XR 12406 Router with a DC PDU and DC-input power entry modules (PEMs) require an external 45A DC circuit breaker for each DC power source. This circuit breaker should protect against short-circuit and overcurrent faults in accordance with United States National Electrical Code NFPA 70 (United States), Canadian Electrical Code, part I, CSA C22.1 (Canada), and IEC 364 (other countries).
•Only a DC power source that complies with the safety extra-low voltage (SELV) requirements in UL 1950, CSA-C22.2 No. 950, EN60950, ACA TS001, AS/NZS 3260, and IEC60950 should be connected to a Cisco XR 12406 Router with DC PDU and DC-input PEMs.
•A Cisco XR 12406 Router configured with DC-input PEMs should be installed in a restricted access area in accordance with Articles 110-16, 110-17, and 110-18 of the National Electric Code, ANSI/NFPA 70.
•A Cisco XR 12406 Router configured with a DC PDU shall have a readily accessible disconnect device incorporated in the fixed wiring.
Compliance and Safety Information
The Cisco XR 12406 Router is designed to meet the regulatory compliance and safety approval requirements. Refer to the Regulatory Compliance and Safety Information for the Cisco 12000 Series Router if you require additional compliance information (see the "Obtaining Documentation and Submitting a Service Request" section on page -xii for site information).
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) damage to circuit boards can occur if proper grounding is not established. The boards can produce intermittent or complete failures if they are mishandled.
When handling circuit boards, observe the following guidelines to prevent ESD damage:
•Always use an ESD-preventive ankle or wrist strap and ensure that the strap makes adequate contact with your skin.
•The ankle or wrist strap protects equipment from ESD voltages on the body only; ESD voltages on clothing can still cause damage to electronic components.
Attaching an ESD-Preventive Strap
Attach an ESD antistatic strap to your body and to an open metal part of the chassis on the Cisco XR 12406 Router (Figure 2-1).
Figure 2-1 Attaching an ESD-Preventive Strap to the Cisco XR 12406 Router Chassis
Periodically check the resistance value of the antistatic wrist strap. The resistance measurement should be between 1 and 10 megohms.
Laser Safety
Single-mode Cisco XR 12000 series router line cards are equipped with lasers. The lasers emit invisible radiation. Do not stare into open line card ports. Observe the following warning to prevent eye injury:
Warning Avoid exposure to laser radiation. Do not stare into an open aperture, because invisible laser radiation may be emitted from the aperture when a cable is not inserted in the port.
Lifting Guidelines
A fully configured Cisco XR 12406 Router weighs approximately 205 pounds (93 kg). Before you install the router, ensure that your site is properly prepared so that you will not have to move the router later to accommodate power source and/or network connections.
To prevent damage, never attempt to lift or tilt the router chassis using the handles on the blower module or line cards. These handles do not support the weight of the chassis.
Whenever you lift any heavy or awkward equipment, follow these precautions to avoid injury to yourself or damage to the equipment:
•When using moving equipment, such as a safety hand truck, pallet jack, or forklift to move the equipment to another location, use only moving equipment that is capable of preventing the router from tipping.
•Have a second person help lift the equipment; avoid lifting the equipment alone.
•Ensure that your footing is solid; balance the weight of the object between your feet.
•Lift the equipment 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 equipment, bend at the knees, not at the waist, to reduce the strain on your lower back muscles.
•Always disconnect all external cables before lifting or moving the router.
Safety with Electricity
Most Cisco XR 12406 router field replaceable units (FRUs) support online insertion and removal (OIR), which means they can be removed and installed (hot-swapped) while the router remains powered on.
•Line cards, switch fabric cards (SFCs), alarm cards, and the blower module are hot-swappable.
•Power modules, clock and scheduler cards (CSCs), and RPs also support OIR, but are hot-swappable only when the system is equipped with two power modules, two CSCs, or two RPs, respectively.
•The power distribution unit (PDU) does not support OIR.
Installation Site Requirements
This section provides the site requirement guidelines that you must consider before installing a Cisco XR 12406 Router:
Rack-Mounting Guidelines
Before installing a Cisco XR 12406 Router in a rack, consider the general rack-mounting guidelines in the following sections.
Types of Equipment Racks
A Cisco XR 12406 Router can be mounted in most two-post, four-post, or telco-type 19-inch equipment racks that comply with the Electronics Industries Association (EIA) standard for equipment racks (EIA-310-D). The rack must have at least two posts with mounting flanges on which to mount the router chassis. The distance between the center lines of the mounting holes on the two mounting posts must be 18.31 inches ± 0.06 inch (46.50 cm ± 0.15 cm).
Equipment Dimensions and Site Layout
Figure 2-2 shows the footprint and outer dimensions of the chassis for the Cisco XR 12406 Router.
Figure 2-2 Chassis Outer Dimensions and Footprint
To help maintain trouble-free operation, consider the following precautions when planning your rack installation:
•The site of the rack must include provisions for source AC or DC power, grounding, and network interface cables.
•For the actual installation, allow sufficient space to work around the rack. You will need at least 3 feet adjacent to the rack to move, align, and insert the chassis. You need at least 2 feet in front of the chassis to insert power modules.
•Maintain at least 24 inches (61 cm) of clearance in front of and behind the chassis for maintenance after installation.
•To mount the router between two posts or rails, the usable aperture (the width between the inner edges of the two mounting flanges) must be at least 17.5 inches (44.5 cm).
•For the enhanced model of the Cisco XR 12406 Router, the mounting rails on a 4-post rack must be recessed no more than 1.5 inches for the front door to fully open and close and to provide adequate room for cable routing.
•The height of the Cisco XR 12406 Router is 18.5 inches (46.9 cm). Most 7-foot (2.15-m) equipment racks will accommodate four Cisco XR 12406 Routers. Allow sufficient space in the rack for the router.
•When fully populated with cards, a Cisco XR 12406 Router can weigh as much as 205 pounds (93 kg). If you use a telco-style rack, the weight of the chassis is cantilevered off of the two rack posts. Ensure that the weight of the router does not make the frame unstable. Be sure that the frame is bolted to the floor and is secured to the building structure, either to wall or to overhead brackets.
•Do not route cables in such a way as to disrupt movement in front of or behind the rack. To avoid noise interference in network interface cables, do not route them directly across or along power cables. Use appropriate strain-relief methods to protect cables and equipment connections.
•Install and use the cable-management brackets included with the router to keep cables organized and out of the way of line cards, power modules, and blower modules. Consider the equipment and cabling that is already installed in the rack. Ensure that cables from other equipment do not impair access to the card cages, requiring you to disconnect cables unnecessarily to perform equipment maintenance or upgrades.
Ventilation
The blower module is mounted at the rear of the chassis; air flow to the air filters and blower module should not be blocked.
Note Warm air is exhausted from the rear of the chassis. Maintain 6 inches (15.24 cm) of clearance at both the inlet and exhaust openings on the chassis to allow sufficient air flow.
•When placing multiple a Cisco XR 12406 Router in the same rack, ensure that there is sufficient ventilation to accommodate the routers.
•Equipment located near the bottom of the rack can generate excessive heat that is drawn upward and into the intake ports of equipment above, possibly leading to overheating.
•The heated exhaust air from other equipment can enter the inlet air vents and cause overheating inside the router.
•A ventilation system that is too powerful in an enclosed rack can also prevent cooling by creating negative air pressure around the chassis and redirecting the air away from the air intake vent. If necessary, operate the router with the rack door open or in an open rack.
•The correct use of baffles inside an enclosed rack can assist in cooling the router.
Environmental Guidelines
This section offers guidelines for operating a Cisco XR 12406 Router in various environments. The following environmental considerations are discussed:
•Airflow
•Temperature and humidity
Airflow
The air circulation system for a Cisco XR 12406 Router consists of one blower module mounted at the rear of the chassis. The blower module maintains acceptable operating temperatures for the internal components by drawing cooling air in through replaceable air filters located on the right side of the chassis. Air circulates through the card cage and exhausts at the rear of the chassis.
Observe the following guidelines when selecting a site in which to install a Cisco XR 12406 Router:
•Dust free—The site should be as dust free as possible. Dusty environments can clog the air filter or power supply intake vents, reducing the cooling air flow through the router. This can cause an over temperature condition in the router.
•Air flow—Allow sufficient air flow by maintaining a minimum of 6 inches (15.24 cm) of clearance at both the inlet and exhaust openings on the chassis and the power modules. If the air flow is blocked or restricted, or if the inlet air is too warm, an over temperature condition can occur within the router. Under extreme conditions, the environmental monitoring system shuts down the power to protect the router components.
Temperature and Humidity
The operating environmental site requirements are listed in Appendix A, "Cisco XR 12406 Router Technical Specifications and Warnings." The temperature and humidity ranges listed are those within which the Cisco XR 12406 Router will continue to operate. You can maintain normal operation by anticipating and correcting environmental irregularities before they approach critical values.
The environmental monitoring functionality built into the Cisco XR 12406 Router protects the system and components from potential damage from overvoltage and over temperature conditions. To assure normal operation and avoid maintenance difficulty, plan and prepare your site before you install the router.
Power Connection Guidelines
A Cisco XR 12406 Router can be configured with either an AC-input power subsystem or a DC-input power subsystem. Site power requirements differ depending on which source power scheme is used. Follow these precautions and recommendations when planning power connections to the router:
•Check the power at your site before installation and periodically after installation to ensure that you are receiving clean power.
•If necessary, install a power conditioner.
•Install proper grounding to avoid damage from lightning and power surges.
Note When operating your router on a single power module, the second power module bay must have a blank filler (MAS-GSR-PWRBLANK=) installed to ensure EMI compliance.
Power Connection Guidelines for AC-Powered Routers
When the Cisco XR 12406 Router operates with an AC PDU, observe these guidelines:
•Original series Cisco XR 12406 routers: A power factor corrector (PFC) allows the power supply to accept AC power source voltage from an AC power source operating from 100 to 120 VAC 20-amp service in North America, and a range of from 185 to 264 VAC 16-amp service in an international environment.
•Enhanced series Cisco XR 12406 routers: Supports 220 VAC only which requires 20-amp service in North America, and 16-amp service in an international environment.
•Use only the 14-foot (4.3-meter) AC power cords shipped with the system.
•Provide a dedicated power source with its own circuit breaker for each AC-input power supply installed in the router.
•Install an uninterruptable power source where possible.
Power plug types used in North America, Australia, and Europe are described in Table 2-1 and shown in Figure 2-3.
Figure 2-3 AC Power Plugs
Power Connection Guidelines for DC-Powered Routers
When the Cisco XR 12406 Router operates with a DC PDU, observe these guidelines:
•A Cisco XR 12406 Router configured with a DC PDU and DC-input PEMs require a dedicated 45A DC circuit breaker for each DC power source. This circuit breaker protects against short-circuit and overcurrent faults in accordance with United States National Electrical Code NFPA 70 (United States), Canadian Electrical Code, part I, CSA C22.1 (Canada), and IEC 364 (other countries).
•DC power cable leads should be #6 American Wiring Gauge (AWG) high-strand-count wire.
•Provide a dedicated power source for each power entry module installed in the router.
•Install an uninterruptable power source where possible.
Grounding Connections
Before you connect power or turn on your Cisco XR 12406 Router, you must provide an adequate system ground for the router. The equipment grounding should be in accordance with local and national electrical codes.
For installations other than in a network equipment building system (NEBS) environment, you may chose to rely on the safety earth ground connection supplied via the International Electrotechnical Commission (IEC) 320 inlets for AC-powered units and the main terminal block ground connection for DC-powered units.
•On Cisco XR 12406 Routers configured for AC-input operation, the AC PDU is equipped with two three-wire electrical grounding-type connectors that accept three-wire, grounding-type AC power cords such as the power cords shipped with the router. This is a safety feature.
•On Cisco XR 12406 Routers configured for DC-input operation, the DC PDU is equipped with two DC power connector blocks, each with wire-connection terminals for connecting the negative lead (top terminal), the positive lead (middle terminal), and the ground lead (bottom terminal). This is a safety feature.
Note The Cisco XR 12404 Router grounding architecture conforms to the DC-I (DC-isolated) method of grounding as described in Telcordia GR-1089-CORE. A DC-I architecture means that there is no connection between the DC return terminal and the frame ground. DC return and frame ground are isolated from one another at the router.
If the router is installed in a NEBS environment, we strongly recommend that you connect the central office ground system or interior equipment grounding system to the supplemental bonding and grounding point on the router chassis. This grounding point consists of three threaded inserts is located on the side of the chassis near the back of the chassis (Figure 2-4). It is also referred to as the NEBS bonding and grounding receptacle, and is intended to satisfy the Telcordia NEBS requirements for supplemental bonding and grounding connections.
Figure 2-4 Supplemental Bonding and Grounding Port for NEBS Compliance
Use a cable lug with two holes at 0.63" (16 mm) centers to connect to the chassis with two 6.3 mm (M6) screws as shown in Figure 2-5. The lug can be ordered from Cisco (Part Number 32-0607-01).
Figure 2-5 Cable Lug
The dual-hole lug is crimped onto a grounding wire of a wire size and length determined by your router location and facility environment. The crimping tool shown in Figure 2-6 is a standard crimping tool obtainable from any normal hardware source.
Figure 2-6 Crimping the Lug
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Place ground wire in the lug |
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Crimp the lug |
Note The three threaded inserts that make up the grounding receptacle are set in a triangle so that you can choose any two of the three holes to attach the lug and grounding cable.
Site Wiring
This section presents site wiring guidelines for setting up the plant wiring and cabling at your site. When planning the location of the new system, consider the following:
•Electromagnetic interference (EMI)
•Distance limitations for signaling and unshielded conductors
Electromagnetic Interference
EMI can occur between the signals on the wires and external or ambient EMI fields when the wires are run for any significant distance. Bad wiring practice can result in radio interference emanating from the plant wiring.
Warning Strong EMI, especially when it is caused by lightning or radio transmitters, can destroy the signal drivers and receivers in the Cisco XR 12406 Router, can create an electrical hazard by conducting power surges through lines, and can damage the equipment.
To predict and remedy strong EMI, you may need to consult experts in radio- frequency interference (RFI).
If you use twisted-pair cable in your plant wiring with a good distribution of grounding conductors, the plant wiring is unlikely to emit radio interference. If you exceed the recommended distances, use a high-quality twisted-pair cable with one ground conductor for each data signal when applicable.
Distance Limitations
If wires exceed recommended distances, or if wires pass between buildings, give special consideration to the effect of a lightning strike in your vicinity. The electromagnetic pulse (EMP) caused by lightning or other high-energy phenomena can easily couple enough energy into unshielded conductors to destroy electronic devices. If you have had problems of this sort in the past, you may want to consult experts in electrical surge suppression and shielding.
Most data centers cannot resolve infrequent but potentially catastrophic problems without pulse meters and other special equipment. These problems can take time to identify and resolve, so take precautions by providing a properly grounded and shielded environment, with special attention to issues of electrical surge suppression.
Unpacking and Repacking the Router
The shipping package for Cisco XR 12000 series routers is engineered to reduce the potential of product damage associated with routine material handling experienced during shipment. To minimize potential damage to the product, transport these products in their Cisco-specified packaging. Failure to do so may result in damage to the router or degradation of its performance. Also, do not remove the Internet router from its shipping container until you are ready to install it. The router should always be transported or stored in an upright position. Keep the router in the shipping container until you have determined a location for installation.
Refer to the unpacking instructions (Cisco XR 12406 Router Unpacking and Repacking Instructions document) that came with the router to unpack it from the shipping pallet and verify the contents. This document also includes instructions to repack the router if you need to transport it.
If you do not receive everything you ordered, contact a customer service representative for assistance. See the section titled Obtaining Documentation and Submitting a Service Request, page -xii.
Transporting a Cisco XR 12000 Series Router
The shipping package for Cisco XR 12000 Series Routers is engineered to reduce the potential of product damage associated with routine material handling experienced during shipment. To minimize potential damage to the product, transport these products in their Cisco-specified packaging. Failure to do so may result in damage to the router or degradation of its performance. Also, do not remove the Internet router from its shipping container until you are ready to install it. The router should always be transported or stored in an upright position. Keep the router in the shipping container until you have determined a location for installation.
Site Preparation Checklist
The Cisco XR 12406 Router comes with a site log. Keep this in a common place near the router where anyone who performs tasks can have access to it. Site log entries might include the following:
•Installation progress—Make entries in the site log to record installation. Note any difficulties encountered and their remedies during the installation process.
•Upgrades and removal/replacement procedures—Use the site log as a record of system maintenance and expansion history, for example:
–FRU installed, removed, or replaced
–Configuration changes
–Software upgrades
–Corrective or preventive maintenance procedures performed
–Intermittent problems
–Your comments
Table 2-2 shows a sample site log. You can make copies of the sample or design your own site log.
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