CH A P T E R 2 Preparing for Installation Before installing the router, consider power and cabling requirements that must be in place at your installation site, special equipment for installing the router, and the environmental conditions your installation site must meet to maintain normal operation. This chapter guides you through the process of preparing for router installation.
Chapter 2 Preparing for Installation Safety Guidelines Safety Guidelines Before you perform any procedure in this publication, review the safety guidelines in this section to avoid injuring yourself or damaging the equipment. In addition, be sure to review the safety warnings listed in the Regulatory Compliance and Safety Information for Cisco 12000 Series Internet Routers publication that accompanied your router before you begin router installation.
Chapter 2 Preparing for Installation Safety Guidelines Safety with Electricity • The installation shall 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) 60364, part 1 through part 7.
Chapter 2 Preparing for Installation Safety Guidelines Preventing Electrostatic Discharge Damage Many router components can be damaged by static electricity. Not exercising the proper electrostatic discharge (ESD) precautions can result in intermittent or complete component failures. To minimize the potential for ESD damage, always use an ESD-preventive antistatic wrist strap (or ankle strap) and ensure that it makes good skin contact.
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Chapter 2 Preparing for Installation Safety Guidelines Lifting Guidelines A fully configured router can weigh as much as 275 pounds (lb) (124.74 kilograms (kg)), while an empty chassis weighs 125 lb (56.7 kg). These systems are not intended to be moved frequently. Before you install the router, ensure that your site is properly prepared so you can avoid having to move the router later to accommodate power sources and network connections.
Chapter 2 Preparing for Installation Site Requirement Guidelines Laser Safety Some line cards are equipped with ports that can emit hazardous laser radiation from the aperture when there is no cable connected to the port. This invisible radiation can cause eye injury if you stare into the port. Warning To avoid eye injury, never stare into open line card ports.
Chapter 2 Preparing for Installation Site Requirement Guidelines Equipment Rack Types 27959 Figure 2-2 a b c Enclosed Rack Figure 2-2a shows a free-standing, enclosed rack with two mounting posts in the front. The router should not be installed in this type of enclosed rack, because the router requires an unobstructed flow of cooling air to maintain acceptable operating temperatures for its internal components.
Chapter 2 Preparing for Installation Site Requirement Guidelines Telco Rack Figure 2-2c shows a telco-type rack. The telco-type rack is an open frame consisting of two posts tied together by a cross-bar at the top and a floor stand at the bottom. This type of rack is usually secured to the floor and sometimes to an overhead structure or wall for additional stability. The router chassis can be installed in the telco-type rack either in a front-mounted position or a center-mounted position (Figure 2-3).
Chapter 2 Preparing for Installation Site Requirement Guidelines Figure 2-3 Front-Mounted and Center-Mounted Installation in a Telco Rack Front-mount rail Cisco 12016 chassis 27958 Center-mount bracket Front-mounted chassis in telco rack Center-mounted chassis in telco rack Cisco XR 12416 and Cisco XR 12816 Router Chassis Installation Guide 2-10 OL-17440-01
Chapter 2 Preparing for Installation Site Requirement Guidelines Site Layout and Equipment Dimensions To help maintain trouble-free operation, adhere to the following precautions when planning your rack installation: • Ensure the site of the rack includes provisions for source AC or DC power, grounding, and network interface cables. • Allow sufficient space to work around the rack during the installation. You need: – At least 3 feet adjacent to the rack to move, align, and insert the chassis.
Chapter 2 Preparing for Installation Site Requirement Guidelines • Install the cable-management brackets included with the router to keep cables organized. Be sure to: – Use appropriate strain-relief methods to protect cables and equipment connections. – Make sure that cables from other equipment installed in the rack do not restrict access to the card cages. • To avoid noise interference in network interface cables, do not route them directly across or along power cables.
Chapter 2 Preparing for Installation Site Requirement Guidelines Figure 2-4 shows the footprint and outer dimensions of the of router chassis. Figure 2-4 Router Chassis Footprint and Dimensions—Top View 17.3 in. 17.963 in. 25.694 in. 18.950 in. 57090 7.731 in.
Chapter 2 Preparing for Installation Site Requirement Guidelines Air Flow Guidelines Cool air is circulated through the router chassis by two blower modules. The blower modules maintain acceptable operating temperatures for the internal components by drawing in cool air through the air filter in front of the switch fabric card cage (middle), and circulating the air through both card cages (Figure 2-5).
Chapter 2 Preparing for Installation Site Requirement Guidelines Figure 2-5 Air Flow Path through the Router - Side View Power supply shelf Air exhaust Top blower module (Plenum) Upper card cage Air filter Room air Middle card cage Lower card cage (Plenum) Bottom blower module Rear 26204 Front Air exhaust Cisco XR 12416 and Cisco XR 12816 Router Chassis Installation Guide OL-17440-01 2-15
Chapter 2 Preparing for Installation Site Requirement Guidelines Temperature and Humidity Guidelines The operating and nonoperating environmental site requirements are listed in Table A-4 on page A-4. The router normally operates within the ranges listed in the table, however, if a temperature measurement is approaching a minimum or maximum parameter it indicates a potential problem.
Chapter 2 Preparing for Installation Site Requirement Guidelines AC-Powered Routers AC PEMs operate in the nominal range of 200 VAC to 240 VAC and require a minimum service of: • 20 A for operation in North America • 16 A for international operation • 13 A for operation in the UK Each of the AC power inputs requires separate dedicated branch circuit. For a list of the nominal and acceptable value ranges for source AC power, refer to Table A-2 on page A-3.
Chapter 2 Preparing for Installation Site Requirement Guidelines Table 2-1 lists power cord options. All AC-input power supply power cords measure 14 feet (4.3 m).
Chapter 2 Preparing for Installation Site Requirement Guidelines You must terminate DC power cables using cable lugs at the power shelf end. Ensure the lugs are dual-hole and that they are able to fit over M6 terminal studs at 0.625-inch (15.88-mm) centers (for example, Panduit Part Number LCD8-14A-L or equivalent). Figure 2-7 shows the type of lug required for the DC-input cable connections. Figure 2-7 DC Power Cable Lug All measurements in inches 2.24 End View 0.48 Ø 0.267 2 holes 0.25 0.
Chapter 2 Preparing for Installation Site Requirement Guidelines Figure 2-8 Typical Source DC Power Cabling Scheme for Power Shelf Bay B1 CO ground AC Central office primary & secondary DC power distribution Rectifiers Plant controls Battery plant Batteries Ground window Central office ground + – Ground + – 27963 Ground Cisco XR 12416 and Cisco XR 12816 Router Chassis Installation Guide 2-20 OL-17440-01
Chapter 2 Preparing for Installation Site Requirement Guidelines Caution DC PEMs contains circuitry to trip the breaker on the PEM if the PEM detects a reverse polarity condition. No damage should occur from reverse polarity, but you should correct a reverse polarity condition immediately. For a list of the nominal and acceptable value ranges for source DC power, refer to Table A-3 on page A-4.
Chapter 2 Preparing for Installation Site Requirement Guidelines Router Bonding and Grounding Receptacles—Top Rear 29183 Figure 2-9 Supplemental bonding and grounding receptacle Figure 2-10 Router Bonding and Grounding Receptacles—Front RX TX IL FA D LE AB EN 1 ROUTE PROCESSOR P/H/F FAST ETERNET 2 ALARM C SF OC-12/STM-4 ATM 1 6DS3–SMB P/H/F 0 RX12DS3–SMB C CS Q OC-3/STM-POS OC-48/STM-16-SCPOS 11 0 NEBS supplemental earth ground receptacle 28022 Air filter door Cisco XR 12416 and
Chapter 2 Preparing for Installation Site Requirement Guidelines To ensure a satisfactory supplemental ground connection to the router, use the following parts: Note These parts are not available from Cisco, but are available from commercial vendors. • Two grounding lugs, which have two M6 bolt holes with 0.625 to 0.75-inch (15.86 to 19.05-mm) spacing between them, and a wire receptacle large enough to accept a 6-AWG or larger, multistrand copper wire.
Chapter 2 Preparing for Installation PRP Port Connection Guidelines Site wiring is unlikely to emit radio interference if you use twisted-pair cable with a good distribution of grounding conductors. Use a high-quality twisted-pair cable with one ground conductor for each data signal, when applicable. Give special consideration to the effect of a lightning strike in your vicinity, especially if the wiring exceeds the recommended distances, or if it passes between buildings.
Chapter 2 Preparing for Installation PRP Port Connection Guidelines Note The auxiliary and console ports are asynchronous serial ports. Ensure that devices connected to these ports are capable of asynchronous transmission. Figure 2-11 shows the auxiliary and console port connections from the PRP to the associated devices.
Chapter 2 Preparing for Installation PRP Port Connection Guidelines PRP Auxiliary Port Signals The PRP auxiliary port is a DTE, RJ-45 interface for connecting a modem or other DCE device (such as a CSU/DSU or another router) to the PRP. The auxiliary port supports hardware flow control and modem control. Table 2-2 lists the signals used on the auxiliary port.
Chapter 2 Preparing for Installation PRP Port Connection Guidelines PRP Console Port Signals The PRP console port is a DCE RJ-45 interface for connecting a terminal to the router. The console port does not support modem control or hardware flow control and requires a roll-over RJ-45 cable. Before connecting a terminal to the console port, check the terminal setting for the data transmission rate, in bits per second (bps).
Chapter 2 Preparing for Installation PRP Port Connection Guidelines PRP Ethernet Connections The PRP has two RJ-45 MDI Ethernet ports; ETH0 and ETH1 (Figure 2-12). PRP Ethernet Connections ETH 1 TX RX K EN TX PRIMARY 70693 PRIMARY LIN K EN RX SL SL OT OT -0 -1 ETH 0 LIN Figure 2-12 These connections support IEEE 802.3 and IEEE 802.3u interfaces compliant with 10BASE-T and 100BASE-TX standards.
Chapter 2 Preparing for Installation PRP Port Connection Guidelines Figure 2-13 shows: • You cannot access Network 2.0.0.0 from Ethernet port (E0) on the PRP in Router A. You can only access Host A, Host B, and Router C, which are in Network 1.0.0.0 (see dotted-line arrows). • To access Network 2.0.0.0 from Router A, you must use an interface port on one of the line cards (a POS line card in this example) in Router A. Data from Router A is routed through Router B and Router C, to reach Network 2.0.0.
Chapter 2 Preparing for Installation PRP Port Connection Guidelines PRP RJ-45 Ethernet Connections The RJ-45 Ethernet connection does not require an external transceiver. Figure 2-14 shows the pin orientation of the RJ-45 Ethernet port and the modular cable plug it accepts. RJ-45 Receptacle and Plug 210222 Figure 2-14 87654321 RJ-45 connector Table 2-4 lists the RJ-45 pin signals used on the connector.
Chapter 2 Preparing for Installation PRP Port Connection Guidelines When connecting the RJ-45 port to a hub or repeater, use the straight-through cable pinout shown in Figure 2-15. Straight-Through Cable Pinout to Hub or Repeater MDI wiring MDI-X wiring 1 TxD+ 1 RxD+ 2 TxD– 2 RxD– 3 RxD+ 3 TxD+ 6 RxD– 6 TxD– H11007 Figure 2-15 When connecting two PRPs back-to-back, use the crossover cable pinout shown in Figure 2-16.
Chapter 2 Preparing for Installation PRP Port Connection Guidelines Table 2-5 lists the cabling specifications for 100-Mbps transmission over unshielded twisted-pair (UTP) cables. Note The transmission speed of the Ethernet ports is autosensing by default and is user configurable.
Chapter 2 Preparing for Installation Alarm Card Connection Guidelines Alarm Card Connection Guidelines The router is equipped with two alarm cards: • One alarm card occupies the dedicated far left slot in the upper card cage • The second alarm card occupies the dedicated far right slot in the lower card cage Each alarm card has one 25-pin D-subconnector (ALARM) on the front panel that connects the router to an external site alarm maintenance system (Figure 2-17).
Chapter 2 Preparing for Installation Alarm Card Connection Guidelines Note To comply with the intrabuilding lightning surge requirements of GR-1089-CORE, Issue II, Revision 01, February 1999, you must use a shielded cable when connecting to the external alarm ports on the alarm card. The shielded cable is terminated by shielded connectors on both ends, with the cable shield material tied to both connectors.
