Installation guide

C-2 Cisco 4000 Series Installation Guide
The Cisco 4700-M main memory upgrade requires replacing the main memory
configuration of two 8-MB SIMMs(16 MB) with two 16-MB SIMMs (32 MB) or with two
32-MB SIMMs (64 MB).
For the Cisco 4000-M shared-memory upgrade, replace the 4-MB shared-memory SIMM
with a 16-MB shared-memory SIMM. The Cisco 4500-M and Cisco 4700-M
shared-memory upgrade permits you to replace the 4-MB shared-memory SIMM with an
8-MB SIMM or a 16-MB SIMM.
To upgrade the Cisco 4000-M Flash memory, replace the standard Flash memory
configuration of 2 MB with 4 MB of Flash memory. The Cisco 4500-M and Cisco 4700-M
Flash memory upgrade requires replacing or adding to the standard Flash memory
configuration of 4 MB with 8, 16, 32, or 64 MB of Flash memory. Figure C-1 shows the
SIMM locations in the Cisco 4000-M.
The Cisco 4000 and the Cisco 4000-M use boot ROMs to store the boot helper Cisco IOS
image. To upgrade the boot ROM software to a new software image in the Cisco 4000 or
Cisco 4000-M, the existing boot ROMs must be replaced.
NVRAM in the Cisco 4000 series uses an internal lithium battery to maintain data.
Although this is not a field-serviceable component, we are required to provide the following
safety warning:
Warning There is the danger of explosion if the battery is replaced incorrectly. Replace
the battery only with the same or equivalent type recommended by the manufacturer.
Dispose of used batteries according to the manufacturer’s instructions. (To see translated
versions of this warning, refer to the appendix “Translated Safety Warnings.”)