A-7
Cisco AS5400 Universal Gateway Chassis Installation Guide
OL-2847-02 0A
Appendix A Replacing Memory Components
Replacing SDRAM DIMMs
Step 10
Replace the chassis cover. (See the instructions in the
“Replacing the Chassis Cover” section on
page A-13
.)
Step 11
Power ON the universal gateway. If error messages relating to memory are displayed, remove the new
boot ROMs and reinstall them, taking care to seat the ROMs firmly in their sockets.
Replacing SDRAM DIMMs
This section describes how to replace SDRAM DIMMs on the system board. You might need to upgrade
the SDRAM DIMMs for the following reasons:
•
You have upgraded to a new Cisco IOS feature set or release that requires more memory.
•
You are using very large routing tables or many protocols (for example, when the universal gateway
is set up as a connection device between large external networks and your internal network).
The system board contains three sockets for SDRAM DIMMs (see
Figure A-4
):
•
Two sockets hold main memory SDRAM DIMMs with each DIMM at 256 MB. Main memory is
used by the CPU to store the operating configuration, routing tables, and queues. The Cisco AS5400
is shipped with one DIMM installed in its socket; the second socket is empty. To increase the
memory capacity to 512 MB, install an additional 256 MB DIMM in the empty socket.
•
One socket holds a packet memory SDRAM DIMM. Packet memory is used to store incoming and
outgoing packets. The maximum packet memory supported is 128 MB.
Required Tools and Equipment
You need the following tools and equipment:
•
ESD-preventive wrist strap
•
The appropriate SDRAM DIMM(s)
SDRAM DIMM Replacement
To replace the SDRAM, follow these steps:
Step 1
Turn the power switch OFF and disconnect site power.
For DC-powered units only, note the following warning.
Warning
Before performing any of the following procedures, ensure that power is removed from
the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel
board that services the DC circuit, switch the circuit breaker to the OFF position, and
tape the switch handle of the circuit breaker in the OFF position. To see translations of
the warnings that appear in this publication, refer to the
Regulatory Compliance and
Safety Information
document that accompanied this device.
Step 2
Remove all interface cables from the DFC cards.
