Replacing or Upgrading Module Memory
This chapter contains the following sections:
•Notes and Cautions
•Installing New SODIMMs
•Checking an SDRAM Upgrade or Replacement
This chapter describes the procedure for removing and replacing the memory on the FlexWAN module in the Catalyst 6500 series switches or Cisco 7600 series routers.
The synchronous dynamic random-access memory (SDRAM) on the Catalyst FlexWAN module is contained in two small outline dual inline memory modules (SODIMMs) (see Figure 2-1). Depending on your system configuration, you might need to upgrade SDRAM. Also, if a system problem is determined to be caused by a SODIMM, you may need to replace the SODIMM.
Notes and Cautions
Note The FlexWAN module has 64 MB of ECC SDRAM (MEM-C6K-WAN-64M) per port adapter bay (128 MB for the entire FlexWAN module). It can be upgraded to 128 MB ECC SDRAM (MEM-C6K-WAN-128M) for each port adapter bay (256 MB for the entire FlexWAN module).
ECC (error correction code) SDRAM is memory that is able to detect and correct some SDRAM errors without user intervention.
Note The default ECC SDRAM memory options for each of the two port adapter bays in the Enhanced FlexWAN module is 256 MB (MEM-CC-WAN-256M) per bay. You can upgrade to 512 MB (MEM-CC-WAN-512M) per bay.
Note You should use only 100-MHz SDRAM SODIMMs. A Cisco part number is inscribed on each SODIMM.
To prevent damage through electrostatic discharge (ESD), handle the SODIMMs by the card edges only (see
Figure 2-3). Place the removed SODIMMs on an antistatic mat and store them in an antistatic container.
To remove the existing SODIMMs, follow these steps:
Step 1 Remove the FlexWAN or Enhanced FlexWAN module from the system.
Step 2 Place the FlexWAN or Enhanced FlexWAN module on an antistatic mat or pad and ensure that you are wearing an antistatic device, such as a wrist strap.
Step 3 Locate the SODIMMs, as shown in Figure 2-1.
Figure 2-1 Location of the SDRAM SODIMMs
Step 4 Release the spring clips from the SODIMM that you want to remove, then release the SODIMM from the socket (see Figure 2-2).
Figure 2-2 Releasing the SODIMM Spring Clips
Step 5 When both ends of the SODIMM are released from the socket, grasp the ends of the SODIMM with your thumb and forefinger and pull the SODIMM completely out of the socket.
Handle the edges of the SODIMM only; avoid touching the memory modules, pins, or the metal traces or fingers along the socket edge.
Step 6 Place the SODIMM in an antistatic container to protect it from ESD damage.
Step 7 To remove the remaining SODIMM, repeat Step 4 through Step 6 in this procedure.
This completes the SODIMM removal procedure. Proceed to the next section for the procedure to install the new SODIMMs.
Installing New SODIMMs
This section describes how to install a SODIMM into a FleXWAN or Enhanced FlexWAN module.
SODIMMs are sensitive components that are susceptible to ESD damage. Handle SODIMMs by the edges only as shown in Figure 2-3—avoid touching the memory modules, pins, or traces (that is, the metal fingers along the connector edge of the SODIMM).
Figure 2-3 Handling a SODIMM
To install the new SODIMMs, follow these steps:
Step 1 Remove a new SODIMM from the antistatic container.
Step 2 Hold the SODIMM component-side-up, with the connector edge (the metal fingers) away from you.
Step 3 Hold the sides of the SODIMM between your thumb and middle finger, with your forefinger against the far edge, opposite the connector edge.
Step 4 Tilt the SODIMM to approximately the same angle as the socket, and insert the connector edge into the socket.
When inserting SODIMMs, use firm but not excessive pressure.
Tip If you damage a socket, you have to return the FlexWAN or Enhanced FlexWAN module to the factory for repair.
Step 5 To install the remaining SODIMM, repeat Step 1 through Step 5.
Step 6 When both SODIMMs are installed, check all four alignment holes (two on each SODIMM) and ensure that the spring clip is visible. If the spring retainer is not visible, the SODIMM is not seated properly.
Step 7 If a SODIMM appears misaligned, carefully remove it and reseat it in the socket. Push the SODIMM firmly back into the socket until the retainer springs snap into place.
Step 8 Reinstall the FlexWAN or Enhanced FlexWAN module in the chassis and restart the system for an installation check (for details, see the next section, "Checking an SDRAM Upgrade or Replacement").
This completes the SDRAM SODIMM replacement procedure.
Checking an SDRAM Upgrade or Replacement
If, after a SDRAM upgrade or replacement, the system fails to boot properly, or if the console terminal displays a checksum or memory error, check the following:
1. Ensure that all SODIMMs are installed correctly.
2. If necessary, shut down the system and remove the FlexWAN or Enhanced FlexWAN module.
3. Check the SODIMMs by looking straight down on them and then at eye level. When properly installed, the SODIMMs should be aligned at the same angle and the same height.
4. If a SODIMM appears to stick out or rest in the socket at a different angle from the others, remove it and reinsert it.
5. Then replace the FlexWAN or Enhanced FlexWAN module and reboot the system for another installation check.
Note The SDRAM SODIMM sockets must contain SODIMMs of the same size and speed or the system cannot operate. SODIMMs must be 100 MHz or faster.
6. If after several attempts the system fails to restart properly, contact a service representative for assistance.
7. Before you call, note any error messages, unusual LED states, or other indications that might help solve the problem.