Table Of Contents
Cisco 12008 Gigabit Switch Router Switch Card Replacement Instructions
Product Numbers: GSR8-CSC= and GSR8-SFC=
Document Order Number: DOC-784956=
This document provides replacement procedures for the clock and scheduler card (CSC) and the switch fabric card (SFC), which are the two types of switch cards used in the Cisco 12008 Gigabit Switch Router (GSR). The document contains the following sections:
Use this document in conjunction with the Cisco 12008 Gigabit Switch Router Installation and Configuration Guide (document number 78-4953-xx), which shipped with your Cisco 12008 Gigabit switch router.
Installation Safety, ESD Precautions, and Required Tools
Before replacing any switch cards in the upper or lower card cage of the Cisco 12008, review the following safety guidelines to prevent injury to yourself or damage to the equipment. This section also lists the tools that you will need to perform the switch card replacement procedures.
Observe the following guidelines to ensure your safety and protect the equipment. This list does not identify all of the potentially hazardous situations that you may encounter in the workplace, so be alert and exercise care when working with any of the switch router's electrical or electronic components.
•Always disconnect all power cords and line card interface cables before moving the Cisco 12008.
•Keep tools and switch router components away from walkway areas.
•Do not work alone if potentially hazardous conditions exist in the work area.
•Do not take any action that poses a potential hazard to yourself, other personnel, or the equipment.
•Carefully examine your work area for potential hazards, such as damp floors, ungrounded power extension cables, and missing safety grounds.
Safety with Electricity
Observe the following basic safety guidelines when working with the switch router's electrical and electronic equipment:
•Before beginning any procedure requiring access to the card cages or other interior switch router components, locate the emergency power-off switch for the room in which you will be working.
•Do not work alone if potentially hazardous conditions exist in your work area.
•Never assume that power has been disconnected from a circuit; always verify that power has been removed before working on the switch router.
•Do not perform any action that poses a potential hazard to yourself, other personnel, or the equipment.
•Carefully examine your work area for possible hazards, such as damp floors, ungrounded power extension cables, and missing safety grounds.
In addition, observe the following guidelines when you are working with equipment connected to telephone wiring or other network cabling.
Do not work on the system or connect or disconnect cables during lightning storms.
•Never install telephone jacks in wet or damp locations unless the jack is specifically designed for use in such areas.
•Never touch uninsulated telephone wires or terminals unless telephone lines are 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 wrist strap and ensure that the strap makes adequate contact with your skin. Connect the equipment end of the strap (the banana jack) into the ESD socket on the lower left edge of the chassis.
•If you intend to return a faulty circuit board to the factory for repair or replacement, immediately place the board in an antistatic bag to prevent ESD damage to the board.
•The wrist strap protects equipment from ESD voltages on the body only; ESD voltages on clothing can still cause damage to electronic components.
CautionFor safety, periodically check the resistance value of the antistatic wrist strap. The resistance measurement should be between 1 and 10 megohms.
Required Tools and Parts
You need the following tools and parts if you want to install or replace a switch card:
•1/4-inch flat-blade screwdriver
•ESD-preventive wrist strap
•GSR8-CSC(=)—Clock and schedular card (CSC)
•GSR8-SFC(=)—Switch fabric card (SFC)
Replacing Switch Cards
This section describes the procedures for removing, installing, and verifying the installation of the Clock and schedular card (CSC) and the Switch fabric card (SFC) for the Cisco 12008.
Note The Cisco 12008 switch cards cannot be used in any other member of the GSR family of Internet Routers.
The Cisco 12008 supports online insertion and removal of electronic components; thus, you can remove and replace a CSC or an SFC without powering down the system.
Note If you do not have a fully-redundant Cisco 12008 (one CRC only), you must power down the system, by shutting off the power supply, before removing the CSC card.
When you install a new CSC or SFC, the switch router's online insertion and removal (OIR) capability enables the new card to be recognized, initialized, and made fully operational in a transparent manner.
Note Four switch planes must be operable in the switch router at all times in order for the switch router to maintain an OC-48 data rate. Cisco Systems recommends that you have a fifth (redundant) switch plane, which can take over in the event of failure of any one of the other switch planes in the switch router.
In the following procedures, it is assumed that you intend to remove and replace a switch card from a fully redundant and operational Cisco 12008.
While you are replacing the failed card, only four switch planes remain available to the switch router. For the duration of the replacement procedure, no redundant switch plane exists to take over if any other switch plane should fail.
In a fully configured system, there is no conventional operating scenario under which you would leave either a CSC or an SFC slot vacant for any substantial length of time, beyond the time it takes to replace a failed card.
Note If you remove a CSC (or any other card) from the upper card cage and do not replace it, you must install a blank filler panel in its place to maintain the integrity of the switch router enclosure. See the section "Installing/Removing a Blank Filler Panel" on page 11 .
Two dedicated slots (CSC 0 and CSC 1) in the middle of the upper card cage are reserved for the exclusive use of the clock and scheduler card (CSC). The standard router configuration calls for one CSC to be installed in either one of two dedicated slots in the upper card cage; for redundancy, you can install a second (optional) CSC in the adjacent slot to provide redundancy of function in the event of failure of either card. There are three dedicated slots (SFC 0, SFC 1, and SFC 2) in the lower card cage for the three SFCs.
Removing an SFC
To remove an SFC from the Cisco 12008, perform the following steps.
Note Before accessing any of the switch router's internal components, put on an antistatic wrist strap and make sure that it makes adequate contact with your skin. Insert the equipment end of the wrist strap (the banana jack) into the ESD socket on the lower left edge of the upper card cage (see ).
Figure 1 Removing an SFC
Step 2 Grasp the front of the card carrier's metal faceplate, unseat the card from the backplane, and slide the SFC out of the slot; supporting the weight of the card by placing your other hand underneath the card carrier. Store the SFC in an antistatic bag or in an antistatic card rack.
Step 3 If you intend to return the card for repair or replacement, leave the card in its antistatic bag and prepare a return package for shipment.
CautionDo not place any tools in the lower card cage. Also, be careful not to damage the honeycomb screen in the air filter assembly. Damaging this screen can restrict the flow of cooling air through the switch router, causing an overtemperature condition.
Installing an SFC
To install an SFC in the Cisco 12008, perform the following steps:
Step 1 With one hand, grasp the new SFC by its card carrier's faceplate; support the weight of the card by placing your other hand underneath the card carrier.
Step 2 Position the card carrier horizontally and insert it into the vacant slot, sliding it under the guide rails (see Figure 2), until the tabs on the bottom of the card carrier clear the line on the chassis and the SFC is firmly seated in the backplane (see ).
Figure 2 Installing an SFC
Step 3 Restore the air filter assembly to the switch router to fully enclose the lower card cage. Secure the assembly in place by tightening its two panel fastener screws.
This completes the procedure for removing and installing an SFC. Upon completion of this procedure, you can verify the operability of the new SFC by performing the procedure in the section "Checking the Installation of Switch Cards" on page 8 .
Removing a CSC
To remove a CSC from the Cisco 12008, perform the following steps.
Note Before accessing any of the switch router's internal components, put on an antistatic wrist strap and make sure that it makes adequate contact with your skin. Insert the equipment end of the wrist strap (the banana jack) into the ESD socket on the lower left edge of the upper card cage.
Figure 3 Removing a CSC
Step 4 If you intend to return the card for repair or replacement, leave the card in its antistatic bag and prepare a return package for shipment.
Step 5 Insert the replacement CSC or a blank filler panel (refer to the section "Installing a CSC" on page 8 or "Installing/Removing a Blank Filler Panel" on page 11 ).
Installing a CSC
To install a CSC in the Cisco 12008, perform the following steps:
Step 1 With one hand, grasp the new CSC by its faceplate; support the weight of the card by placing your other hand underneath the card carrier.
Figure 4 Installing a CSC
This completes the procedure for removing and installing a CSC. Upon completion of this procedure, you can verify the operability of the new CSC by performing the procedure in the section "Checking the Installation of Switch Cards" on page 8 .
Checking the Installation of Switch Cards
To verify the proper operation of a newly-installed switch card, perform the following steps:
Step 1 Observe the LEDs on the faceplate of the CSC(s), as follows:
•For a new CSC—Observe the two status LEDs pertaining to the CSC (see ). If the top (OK) LED is on (green), the new CSC is operational. In this event, the validation procedure is complete. However, if the bottom (FAIL) LED is on (amber), the new CSC is faulty (see ). In this case, proceed to Step 3.
•For a new SFC—The first (primary) indication of SFC status is provided by the status LEDs for the SFCs located at the bottom of the CSC faceplate (see ). If the bottom LED is on (green), the installed SFCs are operational (see ). That ends the validation procedure, except for returning the air filter assembly to its proper place (see Step 3). However, if the top LED is on (amber), one or more of the installed SFCs is faulty (see ). In this case, go to Step 2.
Figure 5 Status LEDs on a CSC
Table 1 LEDs for CSC Status
Status LEDs State Description
Indicates that CSC is faulty
Indicates that CSC is operational
•If the right LED (FAIL) is on (amber), the associated card is faulty (see ). In this case, go to Step 3.
Figure 6 Status LEDs on an SFC
Status LEDs State Description
Indicates that a fault has been detected in one or more of the SFCs
Indicates that SFCs are installed and operating normally
Indicates that no SFCs are installed
LEDs for SFC Status
Step 3 If the new switch fabric is faulty, perform the following steps, as appropriate:
•If the associated LEDs for the card continue to indicate that the card is faulty, replace the card with a new one and repeat the verification procedure from the beginning. If this does not resolve the problem, ask your service representative for assistance.
•If you have installed new SFCs in the lower card cage and they pass the validation tests (as affirmed by the state of the primary and secondary LEDs noted in Step 1 and Step 2, respectively), replace the air filter assembly covering the lower card cage and secure it in place with its two captive installation screws.
In Step 2 above, since the SFCs are not visible during normal operation, you must remove the air filter assembly from the switch router to observe the status LEDs on each SFC. These LEDs are arranged side-by-side (as you view the SFCs from the front of the switch router).
Alternatively, you could issue the following command in EXEC mode to show the status of all the switch router's LEDs:router# show environment leds
If the CSC indicates a fault with an SFC, you must still remove the air filter assembly from the switch router and observe the status LEDs on the SFCs proper to determine which of them was actually at fault.
Installing/Removing a Blank Filler Panel
The Cisco 12008 must be fully enclosed to ensure that cooling air is distributed properly throughout the system. Fully enclosing the router prevents overheating of electronic components and suppresses EMI radiation from the system.
To install a blank filler panel in the upper card cage, perform the following steps:
Step 1 Grasp the filler panel and position it vertically and insert it into the vacant slot.
Step 2 Tighten down the two captive installation screws at the top and bottom of the filler panel, securing it firmly in place.
If it becomes necessary to remove a blank filler panel to accommodate the insertion of a new card in the upper card cage, perform the converse of the steps outlined above.
Figure 7 Installing a Blank Filler Panel in the Upper Card Cage
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