Cisco 12404 Internet Router Consolidated Switch Fabric Replacement Instructions

Cisco 12404 Internet Router Consolidated Switch Fabric Replacement Instructions Document Order Number: DOC-, May 30, 2008 Product Number: GSR04-FABRIC= This publication provides instructions for removing and replacing a consolidated switch fabric (CSF) card in the Cisco 12404 Internet Router. Safety Guidelines, page 1 Preventing Electrostatic Discharge Damage, page 4 Powering Down the AC Powered Router, page 5 Powering Down the DC Powered Router, page 6 Removing and Replacing a Consolidated Switch Fabric Card, page 7 Reconnecting to an AC Power Source, page 10 Reconnecting to a DC Power Source, page 13 Obtaining Documentation and Submitting a Service Request, page 17 Safety Guidelines Before you begin the replacement procedure, review the safety guidelines in this section to avoid injuring yourself or damaging the equipment. In addition, before installing, configuring, or maintaining the Cisco 12404 Internet Router, review the safety warnings listed in the document Regulatory Compliance and Safety Information for the Cisco 12000 Gigabit Switch Router Series (Document Number 78-4347-09) that accompanied your router. Americas Headquarters: Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA

Safety Guidelines Safety Warnings Safety warnings appear throughout this publication in procedures that, if performed incorrectly, may harm you. A warning symbol precedes each warning statement. The following paragraph is an example of a safety warning. It identifies the warning symbol and associates it with a bodily injury hazard. The remaining paragraphs in this section are translations of the initial safety warning. 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. (To see translations of the warnings that appear in this publication, refer to the appendix Translated Safety Warnings in the installation guide that accompanied this device.) Waarschuwing Varoitus Attention Warnung Avvertenza Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico s en dient u op de hoogte te zijn van standaard maatregelen om ongelukken te voorkomen. (Voor vertalingen van de waarschuwingen die in deze publicatie verschijnen, kunt u het aanhangsel Translated Safety Warnings (Vertalingen van veiligheidsvoorschriften) in de installatiegids die bij dit toestel is ingesloten, raadplegen. Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista. (Tässä julkaisussa esiintyvien varoitusten käännökset löydät tämän laitteen mukana olevan asennusoppaan liitteestä "Translated Safety Warnings" (käännetyt turvallisuutta koskevat varoitukset).) Ce symbole d avertissement indique un danger. Vous vous trouvez dans une situation pouvant entraîner des blessures. Avant d accéder à cet équipement, soyez conscient des dangers posés par les circuits électriques et familiarisez-vous avec les procédures courantes de prévention des accidents. Pour obtenir les traductions des mises en garde figurant dans cette publication, veuillez consulter l annexe intitulée «Translated Safety Warnings» (Traduction des avis de sécurité) dans le guide d installation qui accompagne cet appareil. Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät beginnen, seien Sie sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken zur Vermeidung von Unfällen bewußt. (Übersetzungen der in dieser Veröffentlichung enthaltenen Warnhinweise finden Sie im Anhang mit dem Titel Translated Safety Warnings (Übersetzung der Warnhinweise) in der diesem Gerät beiliegenden Installationsanleitung.) Questo simbolo di avvertenza indica un pericolo. Si è in una situazione che può causare infortuni. Prima di lavorare su qualsiasi apparecchiatura, occorre conoscere i pericoli relativi ai circuiti elettrici ed essere al corrente delle pratiche standard per la prevenzione di incidenti. La traduzione delle avvertenze riportate in questa pubblicazione si trova nell appendice, Translated Safety Warnings (Traduzione delle avvertenze di sicurezza), del manuale d installazione che accompagna questo dispositivo. 2

Safety Guidelines Advarsel Aviso Advertencia! Varning! Dette varselsymbolet betyr fare. Du befinner deg i en situasjon som kan føre til personskade. Før du utfører arbeid på utstyr, må du være oppmerksom på de faremomentene som elektriske kretser innebærer, samt gjøre deg kjent med vanlig praksis når det gjelder å unngå ulykker. (Hvis du vil se oversettelser av de advarslene som finnes i denne publikasjonen, kan du se i vedlegget "Translated Safety Warnings" [Oversatte sikkerhetsadvarsler] i installasjonsveiledningen som ble levert med denne enheten.) Este símbolo de aviso indica perigo. Encontra-se numa situação que lhe poderá causar danos fisicos. Antes de começar a trabalhar com qualquer equipamento, familiarize-se com os perigos relacionados com circuitos eléctricos, e com quaisquer práticas comuns que possam prevenir possíveis acidentes. (Para ver as traduções dos avisos que constam desta publicação, consulte o apêndice Translated Safety Warnings - Traduções dos Avisos de Segurança, no guia de instalação que acompanha este dispositivo). Este símbolo de aviso significa peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considerar los riesgos que entraña la corriente eléctrica y familiarizarse con los procedimientos estándar de prevención de accidentes. (Para ver traducciones de las advertencias que aparecen en esta publicación, consultar el apéndice titulado Translated Safety Warnings, en la guía de instalación que se acompaña con este dispositivo.) Denna varningssymbol signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanligt förfarande för att förebygga skador. (Se förklaringar av de varningar som förekommer i denna publikation i appendix "Translated Safety Warnings" [Översatta säkerhetsvarningar] i den installationshandbok som medföljer denna anordning.) Safety with Equipment The following guidelines will help ensure your safety and protect the equipment. This list is not inclusive of all potentially hazardous situations, so be alert. Always disconnect all power cords and interface cables before moving the system. Never assume that power is disconnected from a circuit; always check. Keep tools and assembly components away from walk areas. Do not work alone if potentially hazardous conditions exist. Do not perform any action that creates a potential hazard to people or makes the equipment unsafe. Carefully examine your work area for possible hazards such as moist floors, ungrounded power extension cables, and missing safety grounds. 3

Preventing Electrostatic Discharge Damage Safety with Electricity Follow these basic guidelines when working with any electrical equipment: Before beginning any procedures requiring access to the interior of the router, locate the emergency power-off switch for the room in which you are working. Disconnect all power and external cables before installing or removing a router. Never assume that power has been disconnected from a circuit; always check. Do not perform any action that creates a potential hazard to people or makes the equipment unsafe. Never install equipment that appears damaged. Carefully examine your work area for possible hazards such as moist floors, ungrounded power extension cables, and missing safety grounds. If an electrical accident does occur, proceed as follows: Use caution; do not become a victim yourself. Disconnect power to the router. If possible, send another person to get medical aid; otherwise, assess the condition of the victim and then call for help. Determine if the person needs rescue breathing or external cardiac compressions; then take appropriate action. In addition, observe the following guidelines when working with any equipment that is disconnected from a power source but still connected to telephone or network wiring: Never install telephone wiring during a lightning storm. Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations. Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface. Use caution when installing or modifying telephone lines. Preventing Electrostatic Discharge Damage Electrostatic discharge (ESD) damage to circuit boards can occur if they are handled improperly. Such mishandling can result in intermittent or complete failures of the board. 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. Attach an ESD-preventive strap to your wrist or ankle and to the chassis; or to a bare metal surface. See Figure 1. 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. 4

WITH ALCOHOL WIPES BEFORE CONNECTING CLEAN CONNECTOR CLASS 1 LASER PRODUCT LASERPRODUKT DER KLASSE 1 PRODUIT LASER DE CLASSE 1 PRODUCTO LASER DE CLASSE 1 TX RX ACTIVE CARRIER RX PKT RX TX MII MBUS FAIL ENABLE ALARM FABRIC CONSOLIDATED SWITCH FABRIC Powering Down the AC Powered Router Figure 1 Attach ESD-Preventive Strap to Cisco 12404 Internet Router Chassis 0 1 2 3 EJECT SLOT-1 SLOT-0 RESET AUX CONSOLE COLL LINK MINOR MAJOR CRITICAL RJ-45 40C48/POS-SR-SC GIGABIT ROUTE PROCESSOR 66273 Caution Periodically check the resistance value of the antistatic ankle or wrist strap. The resistance measurement should be between 1 and 10 megohms. Powering Down the AC Powered Router Powering down the AC powered router is presented in the following steps: Step 1 Step 2 Step 3 Step 4 Turn the AC PEM power switch off for each AC PEM. Turn off all circuit breakers for the AC source power. Unplug all power cords from all AC power source outlets. Attach an ESD-preventive strap to your wrist or ankle. Attach the ESD clip to the chassis or to a bare metal surface. 5

Powering Down the DC Powered Router Figure 2 AC PEM 1 2 3 INPUT OUTPUT OUTPUT OK OK FAIL INPUT 100-240V 12A 50/80HZ 66289 6 5 4 1 AC PEM handle 4 Power cord receptacle 2 On/Off switch 5 LEDs 3 Bail Latch 6 Captive screws Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Release the bail latch holding the AC power cord to the power receptacle. Unplug the power cord from the AC PEM receptacle. Verify that the green AC PEM INPUT OK, OUTPUT OK and amber OUTPUT FAIL LEDs are all off. Visually check that the AC PEM fans are all off. Visually check that the fan tray assembly fans are all off. Visually check that all route processor (RP) and line card LEDs are all off. Visually check that the CSF LEDs are all off. Caution In a noisy environment, place your hand in front of the fan compartment on each part with a fan, to ensure the fans are all off. Powering Down the DC Powered Router Powering down the DC powered router is presented in the following steps: Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Turn the DC PEM power switch off for each DC PEM installed. Turn off all circuit breakers for DC source power. Attach an ESD-preventive strap to your wrist or ankle; and attach the ESD clip to the chassis or to a bare metal surface. Verify that the green DC PEM INPUT OK, OUTPUT OK and amber OUTPUT FAIL LEDs are all off. Visually check that the fan tray assembly fans are all off. Visually check that the DC PEM fans are all off. 6

Removing and Replacing a Consolidated Switch Fabric Card Figure 3 DC PEM and PDU 1 2 3 INPUT 48/60V 35A 7 3 6 5 INPUT OUTPUT OUTPUT OK OK FAIL 4 66295 1 DC PDU 5 On/Off switch 2 DC PEM 6 PDU captive screws 3 PEM captive screws 7 Terminal Block 4 LEDs Step 7 Step 8 Visually check that all RP and line card LEDs are all off. Visually check that the CSF LEDs are all off. Caution Step 9 In a noisy environment, place your hand in front of the fan compartment on each part with a fan, to ensure the fans are all off. Remove all power lines positive (+), negative (-) and ground wires connected to the DC PDU block. Removing and Replacing a Consolidated Switch Fabric Card Removing and replacing a CSF card instructions are presented in this section. The CSF card occupies the bottom slot in the card cage. See Figure 4. The CSF occupies the bottom slot in the cage. The CSF card is not hot swappable you cannot remove and replace a CSF card while the system remains powered up. Caution The CSF card is not hot-swappable component of the Cisco 12404 Internet Router. 7

Removing and Replacing a Consolidated Switch Fabric Card Figure 4 CSF Slot Location 3 2 1 0 Fabric Alarm 66252 Tools and Equipment You will need the following items to remove and replace a CSF card: ESD-preventive strap 3/16-inch flat-blade screwdriver Antistatic bag (or similar ESD-preventive container) CSF GSR04-FABRIC= Removing a Consolidated Switch Fabric Card To remove a CSF from the card cage follow these steps. Step 1 Step 2 Step 3 Step 4 Step 5 Attach an ESD-preventive strap to your wrist or ankle; and attach the ESD clip to the chassis or to a bare metal surface. See the Preventing Electrostatic Discharge Damage section on page 4. Power down your router. Use the AC power down procedure Powering Down the AC Powered Router, page 5 for AC powered routers. Use the DC power down procedure Powering Down the DC Powered Router, page 6 for DC powered routers. After you have powered down your router re-attach an ESD-preventive strap to your wrist or ankle; attach the ESD clip to the chassis or to a bare metal surface. Loosen the two captive screws on each side of the CSF card. Grasp the card ejector levers and pivot them away from the CSF card faceplate. 8

WITH ALCOHOL WIPES BEFORE CONNECTING CLEAN CONNECTOR CLASS 1 LASER PRODUCT LASERPRODUKT DER KLASSE 1 PRODUIT LASER DE CLASSE 1 PRODUCTO LASER DE CLASSE 1 MINOR MAJOR CRITICAL MBUS FAIL ENABLE ALARM FABRIC CONSOLIDATED SWITCH FABRIC TX RX RX LINK TX ACTIVE CARRIER RX PKT MII Removing and Replacing a Consolidated Switch Fabric Card Figure 5 Install a CSF Card 0 1 2 3 EJECT SLOT-1 SLOT-0 RESET AUX CONSOLE COLL RJ-45 40C48/POS-SR-SC GIGABIT ROUTE PROCESSOR 66293 Step 6 Step 7 Step 8 Step 9 Slide the CSF half way out of the slot, then stop. Touching only the metal card carrier, use your free hand to support the bottom of the CSF. Slide the card out of the slot and place it directly into an antistatic bag or other ESD-preventive container. If you plan to return the defective CSF to the factory, repackage it in the shipping container you received with the replacement card. Installing a Consolidated Switch Fabric Card To replace or install a CSF in the line card and CSF cage see Figure 5 and follow these steps: Step 1 Step 2 Step 3 Step 4 Attach an ESD-preventive strap to your wrist and to the chassis; or to a bare metal surface. Power down your router. Use the AC power down procedure Powering Down the AC Powered Router, page 5 for AC powered routers. Use the DC power down procedure Powering Down the DC Powered Router, page 6 for DC powered routers. After you have powered down your router re-attach an ESD-preventive strap to your wrist or ankle; attach the ESD clip to the chassis or to a bare metal surface and proceed to step 4. Remove the CSF card from its antistatic bag or ESD-preventive container. Touching only the metal card carrier. Note There are card slot alignment grooves on each side of the CSF cage. When you reinstall a card in an CSF slot, make sure you carefully align both edges of the card carrier in the corresponding card slot grooves. Caution Step 5 Step 6 Avoid touching the card circuitry or any connectors. Set both edges of the CSF carrier into the card slot carrier alignment grooves on either side of the CSF cage. Pivot the ejector levers away from each other; rotate each ejector lever outward away from the faceplate. 9

Reconnecting to an AC Power Source Step 7 Step 8 Use both thumbs to slide the card carrier into the CSC slot until the ejector levers make contact with the front of the card cage, then stop. Pivot the ejector levers toward the faceplate until the connector seats in the backplane. Caution Step 9 Step 10 CSF ejector levers may not fit flush against the CSF faceplate. Tighten the captive screws on each side of the CSF faceplate. Reconnect the router power source. Depending on which router you ordered, refer to the Reconnecting to an AC Power Source section or Reconnecting to a DC Power Source section on page 13. Reconnecting to an AC Power Source This section provides the procedure for reconnecting your router to an AC power source. Caution Turn the AC PEM power switch to the off position before beginning this procedure. Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Attach an ESD-preventive strap to yourself and to either the chassis, or to a bare metal surface. See the Preventing Electrostatic Discharge Damage section on page 4. Locate the AC power cord you removed when you powered down the router. Plug the AC power cord into the AC PEM. Connect the other end of the AC power cord to the AC power source outlet. Verify that the AC power source circuit breaker servicing the AC PEM is switched on. Turn on the AC power switch. Figure 6 AC PEM LEDs INPUT OUTPUT OUTPUT OK OK FAIL INPUT 100-240V 12A 50/80HZ 66290 INPUT OK OUTPUT OUTPUT OK FAIL 1 2 3 10

Reconnecting to an AC Power Source 1 INPUT OK Green AC is present and within specified limits 2 3 OUTPUT OK Green Power supply module is operating normally in a powered up condition OUTPUT FAIL Amber Power module is operating in a fault condition and shutdown has occurred Note When operating your router on an AC power source, both PEM bays must have all AC PEMs installed to ensure compliance with regulatory EMI standards. Checking the Startup Check the startup banner and displays to ensure that the system has restarted properly and that all the interfaces reinitialize properly. You should observe the power module LEDs shown in Figure 6. Also, listen for the fans in the fan tray, you should immediately hear them operating. In a noisy environment, the fans might be difficult to hear; therefore, place your hand in front of the exhaust vents at the side of the chassis to verify that the fans are operating. Visually check the CSF LEDs, MBus LEDs on the CSF, and the RP LEDs on the RP. RP LEDs are located at one end of the RP faceplate, near the ejector lever. Figure 7 CSF LEDs MINOR MAJOR CRITICAL MBUS ALARM FABRIC FAIL ENABLE CONSOLIDATED SWITCH FABRIC MBUS 66246 MINOR MAJOR CRITICAL ALARM FABRIC FAIL ENABLE Table 1 CSF LEDs Switch Fabric LEDs Status Condition CRITICAL Off Normally Off MAJOR Off Normally Off MINOR Off Normally Off Table 2 CSF MBus Alarm LEDs MBus Alarm LEDs Status Condition 11

Reconnecting to an AC Power Source FAIL Off Normally Off ENABLE ON Normally On Table 3 CSF MBus LEDs MBus Fabric LEDs Status Condition FAIL Off Normally Off ENABLE ON Normally On On the console terminal, verify that the console displays the system banner and that the system and all interfaces initialize successfully. If the power supplies do not power up, or if the system or any interfaces do not initialize properly, see Chapter 4, Troubleshooting the Installation, in the Cisco 12404 Internet Router Installation and Configuration Guide. If you are still unable to resolve the problem, contact your Cisco service representative for assistance. 12

Reconnecting to a DC Power Source Reconnecting to a DC Power Source This section provides the procedure for reconnecting your router to a DC power source. Note We recommend each DC PDU be connected to an independent power source for full redundancy. We also recommend that you use an uninterruptable power source (UPS) to protect against power failures at your site. Figure 8 DC Power PEM and PDU Assembly 1 2 3 INPUT 48/60V 35A 7 3 6 5 INPUT OUTPUT OUTPUT OK OK FAIL 4 66295 1 DC PDU 5 On/Off switch 2 DC (PEM) 6 PEM to PDU captive screws 3 System captive screw 7 Terminal Block 4 LEDs Reconnecting a DC PDU and DC PEM Assembly Each DC PDU should be connected to separate DC sources using six threaded terminals. Two terminals for negative (source DC), two terminals for positive (source DC return), and two terminals for ground. Warning Power to your router must be Off and all cables disconnected before you reconnect the DC PDU and DC PEM. The DC PDU and DC PEM when connected, is not a hot-swappable, field replaceable unit. Use this procedure to reconnect power to the DC PEM and DC PDU. The DC power module housing is located at the rear of the chassis. Step 1 Attach an ESD-preventive strap to yourself and to either the chassis, or to a bare metal surface. See the Preventing Electrostatic Discharge Damage section on page 4. 13

INPUT 48/60V 35A INPUT 48/60V 35A OK FAIL INPUT OK OK FAIL Reconnecting to a DC Power Source Figure 9 DC Powered Cisco 12404 Internet Router Rear View OUTPUT OUTPUT INPUT OUTPUT OUTPUT OK 66288 Figure 10 DC PDU Power Block 4 + GND 1 2 3 66949 1 Negative Terminal Port 3 Ground Terminal Port 2 Positive Terminal Port 4 Terminal Port Connector Screws Step 2 Step 3 Secure each lead to the proper terminal port by tightening the terminal port connector screws with a 3/16-inch flat-blade screw driver. Verify that the DC power source circuit breaker servicing the DC PEM is switched on. Checking the Startup Check the startup banner and displays to ensure that the system has restarted properly and that all the interfaces reinitialize properly. You should observe the power module LEDs shown in Figure 13. Also, listen for the fans in the fan tray, you should immediately hear them operating. In a noisy environment, the fans might be difficult to hear; therefore, place your hand in front of the exhaust vents at the side of the chassis to verify that the fans are operating. Visually check the CSF LEDs, MBus LEDs on the CSF, and the RP LEDs on the RP. RP LEDs are located at one end of the RP faceplate, near the ejector lever. Figure 12 shows the RP LED displays. 14

Reconnecting to a DC Power Source Figure 11 CSF LEDs MINOR MAJOR CRITICAL MBUS ALARM FABRIC FAIL ENABLE CONSOLIDATED SWITCH FABRIC MBUS 66246 MINOR MAJOR CRITICAL ALARM FABRIC FAIL ENABLE Table 4 CSF LEDs Switch Fabric LEDs Status Condition CRITICAL Off Normally Off MAJOR Off Normally Off MINOR Off Normally Off Table 5 CSF MBus Alarm LEDs MBus Alarm LEDs Status Condition FAIL Off Normally Off ENABLE ON Normally On Table 6 CSF MBus LEDs MBus Fabric LEDs Status Condition FAIL Off Normally Off ENABLE ON Normally On On the console terminal, verify that the console displays the system banner and that the system and all interfaces initialize successfully. 15

Reconnecting to a DC Power Source RP Alphanumeric LED Display RP LEDs are located at one end of the RP faceplate, near the ejector lever. Figure 12 shows the RP alphanumeric LED displays. Figure 12 RP Alphanumeric LED Displays Left alphanumeric LED display (four digits) Right alphanumeric LED display (four digits) 57079 Each four-digit display shows part of a two-line system message. During the RP boot process, the LED displays present a sequence of messages similar to that shown in. Table 7 RP LED Display, Definition, and Source LED Display Definition Source MROM nnnn LMEM TEST MEM INIT RP RDY RP UP PRI RP SEC RP The MBus microcode begins to execute; nnnn is the microcode version number. For example, microcode version 1.17 displays as 0117. 1 Note This display might not be visible because it occurs for only a brief time. Low memory on the RP is being tested. The size of main memory on the RP is being discovered. The system is operational and ready to execute basic Cisco IOS software commands at the ROM monitor prompt (rommon>). A valid Cisco IOS image is running. The RP is enabled and recognized as the system primary. A valid Cisco IOS image is running. The RP is enabled and recognized as the system secondary. A valid Cisco IOS image is running. 1. The version of MBus microcode running on your system might be different. MBus controller RP ROM monitor RP ROM monitor RP ROM monitor RP IOS software RP IOS software RP IOS software 16

Reconnecting to a DC Power Source DC Power Entry Module LEDs Verify the DC PEM LEDs are on and their status is OK. Figure 13 DC PEM LEDs INPUT 48/60V 35A 1 2 INPUT OUTPUT OUTPUT OK OK FAIL 66399 INPUT OK OUTPUT OUTPUT OK FAIL 3 4 5 1 DC PDU n/a n/a 2 DC PEM n/a n/a 3 4 5 INPUT OK Green DC is present and within specified limits OUTPUT OK Green Power supply module is operating normally in a powered up condition OUTPUT FAIL Amber Power module is operating in a fault condition and shutdown has occurred If the power assembly does not power up, or if the system or any interfaces do not initialize properly, see Chapter 1, Troubleshooting the Installation.. If you are still unable to resolve the problem, contact your Cisco service representative for assistance. Obtaining Documentation and Submitting a Service Request For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What s New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at: http://www.cisco.com/en/us/docs/general/whatsnew/whatsnew.html Subscribe to the What s New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0. 17

Reconnecting to a DC Power Source This document is to be used in conjunction with the Cisco 12404 Internet Router Installation and Configuration Guide, Part Number: DOC-7813511=. CCDE, CCENT, Cisco Eos, Cisco Lumin, Cisco Nexus, Cisco StadiumVision, the Cisco logo, DCE, and Welcome to the Human Network are trademarks; Changing the Way We Work, Live, Play, and Learn is a service mark; and Access Registrar, Aironet, AsyncOS, Bringing the Meeting To You, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, CCSP, CCVP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Cisco Unity, Collaboration Without Limitation, EtherFast, EtherSwitch, Event Center, Fast Step, Follow Me Browsing, FormShare, GigaDrive, HomeLink, Internet Quotient, IOS, iphone, iq Expertise, the iq logo, iq Net Readiness Scorecard, iquick Study, IronPort, the IronPort logo, LightStream, Linksys, MediaTone, MeetingPlace, MGX, Networkers, Networking Academy, Network Registrar, PCNow, PIX, PowerPanels, ProConnect, ScriptShare, SenderBase, SMARTnet, Spectrum Expert, StackWise, The Fastest Way to Increase Your Internet Quotient, TransPath, WebEx, and the WebEx logo are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and certain other countries. All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0805R) Copyright 2008, Cisco Systems, Inc..All rights reserved. 18