Cisco 2600 Series Hardware Installation Guide
Upgrading DRAM
B-2
Upgrading DRAM
This section describes how to upgrade dynamic random-access memory (DRAM) on the
system card. You might need to upgrade DRAM for the following reasons:
•
You have upgraded to a new Cisco IOS software feature set or release.
•
You are using very large routing tables or many protocols (for example, when the router
is set up as part of both a large external network and your internal network).
To see how much memory is currently installed in the router, enter the show version
command. Near the middle of the resulting output, a message similar to the following
appears:
Cisco 2610(MPC860) processor (revision 0x200) with 28672K/4096K bytes of
memory.
This line shows how much memory is installed (in this example, 28672K/4096K). The first
number represents primary memory and the second number represents shared memory.
Cisco 2600 DRAM
Cisco 2600 series routers contain two 100-pin dual in-line memory module (DIMM)
sockets (or banks) for DRAM, numbered 0 and 1. (See Figure B-3.) Each socket can be
filled with a 100-pin DRAM DIMM. You can use the memory-size iomem software
command to configure DRAM as a mixture of shared memory, which is used for data
transmitted or received by network modules and WAN interface cards, and primary or main
memory, which is reserved for the CPU. For further information about this command, see
the Cisco IOS configuration guides and command references.
