Cisco 12016 Gigabit Switch Router Clock and Scheduler/Switch Fabric Card Replacement Instructions

This publication describes how to remove and replace a clock and scheduler card (CSC) or switch fabric card (SFC) in the Cisco 12016 Gigabit Switch Router (GSR). This publication also includes instructions for verifying the operation of the system after you replace a clock and scheduler card or a switch fabric card.

The following sections are included in this publication:

If You Need More Information

Your router and the Cisco IOS software running on it contain extensive features and functionality, which are documented in the following resources:

Cisco Documentation CD-ROM package

: Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly. Therefore, it might be more current than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.
: If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.

For Cisco IOS software configuration information and support, refer to the modular configuration and modular command reference publications in the Cisco IOS software configuration documentation set that corresponds to the Cisco IOS software release installed on your Cisco hardware. You can also refer to the Cisco IOS software release notes for the version of Cisco IOS software you are using on your router.
For hardware installation and maintenance information on the Cisco 12000 series routers, refer to the installation and configuration guide that shipped with your Cisco 12000 series router.
For information on regulatory compliance and safety, refer to the document Regulatory Compliance and Safety Information for the Cisco 12000 Series Gigabit Switch Routers.
To view Cisco documentation or obtain general information about documentation, refer to the following sources:
- Documentation CD-ROM.
- Cisco Connection Online (CCO). (Refer to the "Cisco Connection Online" section.)
- Customer Service at 800 553-6387 or 408 526-7208. Customer Service hours are 5:00 a.m. to 6:00 p.m. Pacific time, Monday through Friday (excluding company holidays). You can also send e-mail to cs-rep@cisco.com.
- The Cisco Information Packet that shipped with your router.

Switch Fabric Overview

The heart of the Cisco 12016 GSR is a crossbar switch fabric that provides synchronized gigabit speed interconnections between the line cards and the GRP. The switch fabric for the Cisco 12016 GSR consists of two clock and scheduler cards and three switch fabric cards installed in the switch fabric card cage. (See Figure 1.) One clock and scheduler card (CSC) and the three switch fabric cards (SFCs) are the active switch fabric; the second CSC provides redundancy for the other four cards. Each card provides a 2.5 Gbps full-duplex connection to the other cards in the switch fabric.

Figure 1: Switch Fabric Card Cage

Note These cards support online insertion and removal (OIR), which means you can remove and replace a card while the Cisco 12016 remains powered up.

Switch Fabric Card Types

The Cisco 12016 GSR ships from the factory with two CSCs and three SFCs installed in the five slots in the switch fabric card cage. Clock and scheduler cards are installed in slot 0 or slot 1 (labeled CSC 0 or CSC 1); switch fabric cards are installed in slots 2, 3, and 4 (labeled SFC 0, SFC 1, or SFC 2).

The clock and scheduler card contains the following functionality:

Switch fabric---Carries the user traffic between line cards or between the GRP and a line card. The switch fabric on the clock and scheduler card is identical to the switch fabric on the switch fabric card.
Scheduler---Handles requests from the line cards for access to the switch fabric and determines when to allow the line cards access to the switch fabric.
System clock---Sent to all switch fabric cards, line cards, and the GRP. The system clock synchronizes data transfers between line cards or between line cards and the GRP through the switch fabric.

The switch fabric card contains only the switch fabric circuitry, which carries user traffic between line cards or between the GRP and the line cards. The switch fabric card receives scheduling information and the system clock sent from the clock and scheduler card.

The second CSC in the Cisco 12016 GSR provides data path, scheduler, and reference clock redundancy. The interfaces between the line cards and the switch fabric are monitored constantly. If the system detects a loss of synchronization (LOS), it automatically activates the data paths of the redundant CSC, and data flows across the redundant path. The switch to the redundant CSC occurs within microseconds, with little or no loss of data.

Alarm Card Switch Fabric Card Cage Status LEDs

There are no status LEDs on the clock and scheduler card or switch fabric card, and the switch fabric card cage slots are hidden behind the air filter. LEDs on the faceplate of the alarm card (see Figure 2) display the status of the cards in the switch fabric card cage.

Figure 2: Switch Fabric Card Cage LEDs on the Alarm Card

The alarm card faceplate has one pair of LEDs for each of the five card slots in the switch fabric card cage. Each pair of LEDs consists of one green LED labeled ENABLED and one yellow LED labeled FAIL. When the green LED is on, the card in the corresponding slot in the switch fabric card cage has been detected by the system and is functioning correctly. When the LED is off, either the slot is empty or the card installed in the slot is faulty. When the yellow LED is on, the router has detected a fault in the card installed in the corresponding slot in the switch fabric card cage.

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, 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-xx) that accompanied your Cisco 12016 GSR before installing, configuring, or maintaining the router.

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 Regulatory Compliance and Safety Information document that accompanied this device.

Waarschuwing 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 document Regulatory Compliance and Safety Information (Informatie over naleving van veiligheids- en andere voorschriften) raadplegen dat bij dit toestel is ingesloten.

Varoitus 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 laitteen mukana olevasta Regulatory Compliance and Safety Information -kirjasesta (määräysten noudattaminen ja tietoa turvallisuudesta).

Attention Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers posés par les circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions d'avertissements figurant dans cette publication, consultez le document Regulatory Compliance and Safety Information (Conformité aux règlements et consignes de sécurité) qui accompagne cet appareil.

Warnung 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 Dokument Regulatory Compliance and Safety Information (Informationen zu behördlichen Vorschriften und Sicherheit), das zusammen mit diesem Gerät geliefert wurde.

Avvertenza Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. 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 nel documento Regulatory Compliance and Safety Information (Conformità alle norme e informazioni sulla sicurezza) che accompagna questo dispositivo.

Advarsel Dette varselsymbolet betyr fare. Du befinner deg i en situasjon som kan føre til personskade. Før du utfører arbeid på utstyr, må du vare 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 dokumentet Regulatory Compliance and Safety Information (Overholdelse av forskrifter og sikkerhetsinformasjon) som ble levert med denne enheten.

Aviso Este símbolo de aviso indica perigo. Encontra-se numa situação que lhe poderá causar danos físicos. 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 documento Regulatory Compliance and Safety Information (Informação de Segurança e Disposições Reguladoras) que acompanha este dispositivo.

¡Advertencia! 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 una traducción de las advertencias que aparecen en esta publicación, consultar el documento titulado Regulatory Compliance and Safety Information (Información sobre seguridad y conformidad con las disposiciones reglamentarias) que se acompaña con este dispositivo.

Varning! 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 förkommer i denna publikation i dokumentet Regulatory Compliance and Safety Information (Efterrättelse av föreskrifter och säkerhetsinformation), vilket 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.

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

Many router components can be damaged by static electricity. Some components can be damaged by voltages as low as 30V, while static voltages as high as 35,000V can be generated just by handling plastic or foam packing material, or by sliding assemblies across plastic and carpets. Not exercising the proper electrostatic discharge (ESD) precautions can result in intermittent or complete component failures. To minimize the potential for ESD damage, observe the following guidelines:

Always use an ESD-preventive antistatic wrist strap or ankle strap and ensure that it makes good skin contact.

Caution You should periodically check the resistance value of the ESD-preventive strap. The measurement should be between 1 and 10 megohms.

When removing or installing a component, make sure the equipment end of your antistatic strap leash is connected to one of the ESD connection sockets on the front of the chassis or to a bare metal surface on the chassis. (See Figure 3.) Avoid contact between the component and your clothing. The ESD-preventive wrist strap only protects the component from ESD voltages on the body; ESD voltages on your clothing can still cause component damage.

Figure 3: Connecting an ESD-preventive Wrist Strap to the Cisco 12016 Chassis

Always place a card component-side up on an antistatic surface, in an antistatic card rack, or in a static shielding bag. If you are returning the item to the factory, immediately place it in a static shielding bag.
When installing a line card or GRP, use the ejector levers to seat the card connectors in the backplane, then tighten both captive screws on the card's faceplate. These screws prevent accidental removal, provide proper grounding for the router, and help to ensure that the card connector is seated in the backplane.
When removing line cards, clock and scheduler cards, switch fabric cards, or a GRP, use the ejector levers to unseat the card connector from the backplane. Pull the metal card carrier out slowly, placing one hand along the bottom of the carrier to guide it straight out of the slot.
Handle line cards, clock and scheduler cards, switch fabric cards, or a GRP by the metal card carrier edges only; avoid touching the board or any connector pins.

Tools and Parts Required

You need the following tools and parts to remove and replace either a clock and scheduler card or a switch fabric card:

ESD-preventive wrist strap
3/16-inch flat-blade screwdriver
The replacement card:
- Clock and scheduler card (Product Number GSR16/80-CSC=)
- Switch fabric card (Product Number GSR16/80-SFC=)

Removing and Replacing a Card in the Switch Fabric Card Cage

The switch fabric card cage is located below the upper card cage, behind the air filter door on the front of the chassis. (See Figure 1.) The switch fabric card cage has five keyed, vertical card slots for the clock and scheduler cards and switch fabric cards. Clock and scheduler cards are installed in the left two card slots (labeled CSC 0 and 1); switch fabric cards are installed in the right three slots (labeled SFC 0, 1, and 2).

Note The Cisco 12016 GSR supports online insertion and removal of a switch fabric card (far right three slots of the switch fabric card cage), meaning you can remove and replace, or upgrade your router with a new switch fabric card while the router remains powered up.

A clock and scheduler card can be removed and replaced with the router powered up only if there is a redundant clock and scheduler card installed. If your system is running with only one clock and scheduler card, you must power down the router before removing the clock and scheduler card.

This section provides three procedures:

Removing a Card from the Switch Fabric Card Cage

To remove a card from the switch fabric card cage, follow these steps:

Step 1 Attach an ESD-preventive wrist strap to your wrist and connect the leash to one of the ESD connection sockets on the front of the chassis or to a bare metal surface on the chassis. (See Figure 3.)

Step 2 Open the air filter door on the front of the chassis (see Figure 4):

Figure 4: Opening the Air Filter Door

(a) Loosen the two captive screws on each side of the air filter door.

(b) Grasp the sides of the air filter door front cover and carefully swing the door out and down, away from the switch fabric card cage.

The air filter door is attached to the chassis by a pair of spring-loaded arms on either side of the door. When the door is fully extended away from the fabric card cage, it hangs down in front of the lower card cage.

Caution Be especially careful not to damage the honeycomb screen on the back of the air filter door and on the inside of the switch fabric card cage. Damaging the honeycomb screen can restrict the air flow and cause an overtemperature condition in the router. It can also diminish EMI protection.

Figure 5: Removing a Card from the Switch Fabric Card Cage

Step 3 Identify the defective card in the switch fabric card cage. Grasp the two card ejector levers and simultaneously pivot both ejector levers 90 degrees away from the front edge of the card carrier to unseat the card from the backplane connector. (See Figure 5.)

Step 4 Touching only the metal card carrier, slide the card out of the slot and place it directly into an antistatic sack or other ESD-preventive container.

If you plan to return the defective card to the factory, repackage it in the shipping container you received with the replacement card.

Installing a Replacement Card in the Switch Fabric Card Cage

Install clock and scheduler cards (CSCs) in the two far left slots of the switch fabric card cage. Install switch fabric cards (SFCs) in the three far right slots.

Figure 6 shows the steps in installing a replacement card in the switch fabric card cage.

Figure 6: Installing a Replacement Card in the Switch Fabric Card Cage

To install a replacement card in the switch fabric card cage, use Figure 6 as a reference and follow these steps.

Step 2 Remove the replacement card from its antistatic packaging.

Note

Step 3 Grasp the card carrier handle with one hand and place your other hand under the carrier to support and guide it into the correct slot. Slide the card halfway into the slot. Avoid touching the card circuitry or any connectors.

Step 4 Pivot both card ejector levers so the openings on the card ejector cams at the top and bottom of the card pass over the tabs on each side of the card cage slot.

Caution Verify that the openings on the card ejector cams pass over the tabs; otherwise, one or both ejector levers might bind when you attempt to close the ejector levers, damaging or breaking one or both ejector levers.

Step 5 Continue sliding the card into the card cage slot until the openings on the card ejector cams engage the tabs on each side of the card cage slot.

Note

Step 6 To seat the card in the backplane connector, grasp both card ejector levers and pivot them inward toward the handle in the card carrier until they are flush against the front edge of the card carrier.

Step 7 Close and fasten the air filter door (see Figure 7):

Figure 7: Closing the Chassis Air Filter Door

(a) Pivot the air filter door up so that it is aligned with the opening of the switch fabric card cage and the four guide pins are inserted in the corresponding holes on each side of the switch fabric card cage.

Caution All four sides of the air filter door are lined with EMI-preventive gaskets consisting of many raised, conductive contacts. Align and seat the door carefully to avoid damaging the EMI-preventive gasket contacts. A damaged gasket can result in reduced EMI performance.

(b) Push firmly on the air filter door until it is seated in the opening of the switch fabric card cage, then tighten the four captive screws.

Caution The air filter door must be closed and secured at all times to maintain correct EMI performance.

Checking the Installation

Complete the following steps to verify that the new clock and scheduler card or switch fabric card is working properly:

Step 1 Check the following components to make sure that they are secure:

The cards in the switch fabric card cage are fully seated in their slots and the card ejector levers are flush with the front edge of the card carriers.
The air filter door is up, seated in the switch fabric card cage opening, and the four captive screws are tightened.

Step 2 Observe the five pairs of switch fabric status LEDs on the alarm cards (leftmost slot in the upper card cage; rightmost slot in the lower card cage). Both alarm cards should display the same status:

The green LED labeled ENABLED for each installed clock and scheduler and switch fabric card should be on.

: If one of the green LEDs is off, either the corresponding slot in the switch fabric card cage is empty or the card in that slot has not been installed correctly. Try reseating the card in the backplane connector.

The yellow LED labeled FAIL for each installed clock and scheduler and switch fabric card should be off.

: If one of the yellow LEDs is on, the system has detected a fault in the card installed in the corresponding slot. The card might not be installed completely or could have an internal fault. Try reseating the card in its slot. If that does not resolve the problem, contact your service representative for assistance.

FCC Class A Compliance Notice (United States)

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required to correct the interference at their own expense.

You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices. If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following measures:

Turn the television or radio antenna until the interference stops.
Move the equipment to one side or the other of the television or radio.
Move the equipment farther away from the television or radio.
Plug the equipment into an outlet that is on a different circuit from the television or radio. (That is, make certain the equipment and the television or radio are on circuits controlled by different circuit breakers or fuses.)

Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval and negate your authority to operate the product.

ICES-003 Class A Compliance Notice (Canada)

English Statement of Compliance

This class A digital apparatus complies with Canadian ICES-003.

French Statement of Compliance

Cet appareil numerique de la classe A est conforme a la norme NMB-003 du Canada.

VCCI Class B Compliance Notice (Japan)

This is a class B product based on the standard of the Voluntary Control Council for Interference from Information Technology Equipment (VCCI). If this is used near a radio or television receiver in a domestic environment, it may cause radio interference. Install and use the equipment according to the instruction manual.

Cisco Connection Online

Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.

Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.

CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.

You can access CCO in the following ways:

WWW: http://www.cisco.com
WWW: http://www-europe.cisco.com
WWW: http://www-china.cisco.com
Telnet: cco.cisco.com
Modem: From North America, 408 526-8070; from Europe, 33 1 64 46 40 82. Use the following terminal settings: VT100 emulation; databits: 8; parity: none; stop bits: 1; and connection rates up to 28.8 kbps.

For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.

Note If you are a network administrator and need personal technical assistance with a Cisco product that is under warranty or covered by a maintenance contract, contact Cisco's Technical Assistance Center (TAC) at 800 553-2447, 408 526-7209, or tac@cisco.com. To obtain general information about Cisco Systems, Cisco products, or upgrades, contact 800 553-6387, 408 526-7208, or cs-rep@cisco.com.

Table of Contents

Cisco 12016 Gigabit Switch Router Clock and Scheduler/Switch Fabric Card Replacement Instructions