12
Installing and Upgrading Internal Modules in Cisco 2800 Series Routers
OL-5792-04
Installing and Removing DRAM DIMMs
Figure 11 Module Locations in Cisco 2851 Router
Installing and Removing DRAM DIMMs
Cisco 2801 routers have 128 MB of SDRAM installed on the system board. You can install an additional
DIMM in the DIMM connector to expand system memory to a maximum of 384 MB.
Note The Cisco 2801 uses a different type of DRAM DIMM than the Cisco 2811, Cisco 2821, and Cisco 2851
routers.
Cisco 2811, Cisco 2821, and Cisco 2851 routers have two DIMM connectors and are designed to operate
with either one or two DRAM DIMMs installed, depending on the amount of memory needed. If only
one DRAM DIMM is used, it can be installed in either DIMM connector.
Before you remove or install a DRAM DIMM, remove the chassis cover as described in the “Removing
the Chassis Cover” section on page 2.
Caution When you remove or install DIMMs, always wear an ESD-preventive wrist strap, and ensure that it
makes good contact with your skin. Connect the equipment end of the wrist strap to the metal part of the
chassis.
1 AIM connectors 4 Power supply connectors
2 DRAM DIMMs 5 Fans
3 PVDMs
4
1
1
2
3
5
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