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The CSC-MC is a memory card applique for the A-type, M, and C chassis. The CSC-MC will store 32 kilobytes (KB) of configuration information in nonvolatile random-access memory (NVRAM). The CSC-MC card connects to a CSC-MCI interface card (Version 3 or hardware type 1.1 only), or to the CSC-1R or CSC-2R Token Ring interface cards. This connection is by way of a 50-pin ribbon cable. In the M and C chassis, the CSC-MC is anchored to four spacers on the bottom of the chassis, and in the A-type chassis, to four spacers on the top of the card cage. The CSC-MC card requires no special jumpers or configuration settings, and does not require a Multibus card slot be used.
The NVRAM chips on the CSC-MC card come equipped with built-in lithium batteries for nonvolatile memory backup in case of power failure. These batteries are designed to last ten years.
Electrostatic discharge (ESD) is a discharge of stored static electricity that can damage equipment and impair electrical circuitry. It occurs when electronic components are improperly handled and can result in complete or intermittent failures.
Following are guidelines for preventing ESD damage:
 | Caution For safety, periodically check the resistance value of the antistatic strap. The measurement should be between 1 and 10 mega ohms. |
The CSC-MC card can be used by all A-type (except AGS+), M, and C chassis, which are not configured with the CSC-R Token Ring or CSC-P parallel printer interface cards.
It is strongly recommended that in all cases you upload the running configuration file before the CSC-MC installation, and download it after. Doing this will safeguard the integrity of the configuration.
 | Caution The CSC-MC can be used to replace a failed CSC-MC or replace a Multibus memory card (CSC-M). You must upload the running configuration to a file server (using Trivial File Transfer Protocol [TFTP]) before you remove the Multibus memory card to be replaced. If this is not done, the entire configuration will be lost (inside the removed Multibus memory card) and it will be necessary to reenter the entire configuration manually. |
Before a fix was implemented in Maintenance Release 9.1(10), the configuration data stored in NVRAM on the CSC-MC and Flash cards was formatted differently when these cards were connected to CSC-2R cards versus MCI-3 cards. Moving a CSC-MC or Flash xBus cable from the xBus connector on an MCI-3 card to the connector on a CSC-2R card (or back again) requires erasing and rewriting the contents of the memory on the relocated Flash or CSC-MC card. This caveat does not apply to system images stored on Flash cards.
Follow these steps to copy your configuration file to a remote host. You will retrieve the file after the new CSC-MC is installed. The following procedure includes the steps for creating a temporary file; skip step 1 if you already have a usable file.
Step 2 Return to the router enable mode.
Step 3 Upload the configuration to the temporary file using the privileged command write network.
Step 4 The system will prompt you for a host name or address and the file name. Enter the address and name of the file you just created, or select a host that can act as a TFTP server. Sample output of the previous steps follows:
The !!!! and [ok] indicate that the operation was successful and that the configuration is sagely stored in the temporary file on the TFTP file server. A failure is indicated with ... [timed out] or [failed]. A failure indicates a net fault or the lack of a writable, readable file on the TFTP server.
When the CSC-MC is installed correctly, retrieve the configuration file you stored as follows:
Step 2 Use the command write term to verify that the configuration is present in the running memory of the router. The configuration will be written to the terminal screen.
Step 3 Save the configuration into the nonvolatile memory with the command write memory.
Use one of the following procedures given your chassis model.
The following tools are required for accessing the chassis interior:
Following is the procedure for accessing the A-type chassis interior.
 | Warning Before accessing the chassis interior, turn OFF power to the chassis and unplug the power cord because hazardous voltages may exist in or near the power supply. Use extreme caution when working near the power supply. |
Step 2 If the chassis is rack mounted, disconnect all external cables from the chassis rear panel. Note where these cables were connected, for reinstallation.
Step 3 Remove the chassis from the rack and transfer it to a desktop or work table.
Step 4 If you will need to handle any electronic components (cards and so forth), attach appropriate ESD protection and attach the AC power cord, but to prevent a shock hazard, make certain the chassis power is OFF.
Step 5 To access cards in the card cage, loosen the two thumbscrews and remove the front panel from the chassis. (See Figure 2.) If you wish to access cards in the card cage only, skip the next step.
Step 6 To access other system components, locate and remove the seven No. 1 Phillips screws securing the top cover. (See Figure 2.) Set the top cover and screws aside.
Following is the procedure for accessing the M chassis interior.
Step 2 If the chassis is rack mounted, disconnect all external cables from the chassis rear panel. Note where these cables were connected, for reinstallation.
Step 3 Remove the chassis from the rack and transfer it to a desktop or work table.
Step 4 If you need to handle any electronic components (cards and so forth) attach appropriate ESD protection and attach the AC power cord, but to prevent a shock hazard, make certain the chassis power is OFF.
Step 5 To access the cards in the card cage, locate the three flat-blade screws that secure the card cage access panel. (See Figure 3.) These screws are located on the top of the MGS chassis access panel.
Step 6 Using the flat-blade screwdriver, turn each of these screws 1/4 to 1/2 turn counterclockwise until the screw pops up.
Step 7 Using the No. 2 Phillips screwdriver, loosen the three screws at the bottom edge of the card cage panel. (Do not remove these screws completely.) Carefully remove the card cage panel and set it aside.
Step 8 To access the other chassis components, use the No. 1 Phillips screwdriver to remove the 14 screws that secure the top cover of the MGS chassis. (See Figure 3.) Set the top cover aside.
Following is the procedure for accessing the C chassis interior.
Step 2 If you need to handle any electronic components (cards and so forth) attach appropriate ESD protection and attach the AC power cord, but to prevent a shock hazard, make certain the chassis power is OFF.
Step 3 Use the No. 2 Phillips screwdriver to remove the ten screws that secure the cover of the
C chassis. There are two screws on each side and six screws on the bottom of the chassis. (See Figure 4.)
Step 4 Position the chassis so that the back (the side with the ports) is on your left; the front of the chassis (with the LED) is on your right; and the chassis top is facing up. (This is completely opposite of the chassis position shown in Figure 4.)
Step 5 Pull the front of the cover to the right (while securing the back of the chassis with your left hand) until the power supply and card cage are completely exposed. Because the fit is snug, pull slowly and carefully, and do not remove the cover.
 | Caution |
In both the M and C chassis, the CSC-MC card is not installed inside the card cage, but is attached to the bottom of the chassis (directly below the card age). In the A-type chassis, the CSC-MC is installed on the top of the card cage (directly beneath the top cover).
Following is the procedure to install the CSC-MC:
Step 2 Access the chassis interior using the appropriate procedure in the section "Opening the Chassis."
Step 3 For the M and C chassis—remove all previously installed cables and cards. Make a note of the position of each cable and card for reinstallation.
Step 4 For the A-type chassis—loosen only the CSC-MCI-3, CSC-1R, or CSC-2R interface card closest to the top of the card cage. Do not remove this card completely.
Step 5 Place all cards on an antistatic mat or foam; do not stack the cards on top of one another.
Step 6 Attach the 50-pin ribbon cable to the CSC-MC card before mounting it in the chassis. Both connector ends on the cable are keyed to ensure proper connection.
Step 7 Locate the four spacers on the bottom of the M and C chassis (beneath the card cage) or on top of the card cage in the A-type chassis. (Contact a service representative if your chassis does not have these spacers.)
Step 8 Orient the CSC-MC card over the four spacers so that the 50-pin ribbon cable and connector are toward the front of the card cage. Using the four Phillips screws that came with the CSC-MC card, mount the card to the four spacers.
Step 9 For the M and C chassis—reinstall the MCI-3, CSC-1R, or CSC-2R interface card in the bottom slot of the card cage (directly above the CSC-MC card) and reattach the cables appropriate to the interface card.
Step 10 For the M and C chassis—route the 50-pin cable from the CSC-MC card, up and over the interface cables currently attached to the interface card. Attach the 50-pin cable to the 50-pin NVRAM connector on the interface card.
 | Warning To prevent an electrical short circuit after reinstalling remaining cards in the M and C chassis, check the clearance above the end of the 50-pin cable attached to the 50-pin connector on the interface card. Make certain this cable isn't rubbing against the exposed pins of the card just above the interface card. |
Step 11 For the A-type chassis—route the 50-pin cable from the CSC-MC card down to the NVRAM connector on the interface card. Attach the 50-pin cable to the NVRAM connector on the interface card. Ensure that the cable is not crimped or stressed between the two cards.
Step 12 Reinstall all remaining cards and reattach all remaining cables.
 | Warning The next part of this procedure requires chassis operation with all covers removed. Use extreme caution around the chassis because potentially harmful voltages are present within. |
Step 13 Plug in the power cord, and turn ON power to the chassis for an installation check.
Step 14 The CSC-MC card has one green LED. This LED indicates whether power is correctly supplied to the card and should be on when power is on. If the LED is off, check the 50-pin ribbon cable between the interface and CSC-MC cards for possibly incorrect installation. If the LED fails to come on, contact a service representative
Step 15 Turn OFF power.
Step 16 Replace the card access panel and top cover on the A-type and M chassis, or the card clips and top cover on the C chassis.
Step 17 Turn ON power to the chassis on and allow the system to boot.
Note If the running configuration was uploaded to the file server before installing the CSC-MC, proceed to the section "Retrieving the Configuration File."
The chassis is now ready to be reinstalled in the network.
This completes the installation.
Note For technical assistance, contact a service representative or the Cisco Systems Technical Assistance Center (TAC) at 800 553-2447, 415 903-7209, or tac@cisco.com. For upgrade or product information, contact the Customer Response Center at 800 553-6387, 415 903-7208, or cs-rep@cisco.com.
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Posted: Thu Nov 6 16:05:07 PST 2003
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