Memory Capacities; Cisco 261X, Cisco 262X, Cisco 265X, And Cisco 26Xxxm - Cisco 2600 Series Hardware Installation Manual

Upgrading DRAM

Memory Capacities

Cisco 2600 series routers use two types of dynamic memory:
•
•
EDO DRAM and SDRAM DIMMs are not interchangeable. Although it is mechanically possible to
Caution
install an incorrect DRAM DIMM into a router, the router will not boot.
DRAM memory capacities are shown in
Table B-1
Router
Cisco 2610
Cisco 2611
Cisco 2612
Cisco 2613
Cisco 2620
Cisco 2621
Cisco 2650
Cisco 2651
Cisco 2610XM
Cisco 2611XM
Cisco 2620XM
Cisco 2621XM
Cisco 2650XM
Cisco 2651XM
Cisco 2691

Cisco 261x, Cisco 262x, Cisco 265x, and Cisco 26xxXM

Most Cisco 2600 series routers contain two 100-pin dual in-line memory module (DIMM) sockets (or
banks) for DRAM, numbered 0 and 1. (See
DIMM (EDO or SDRAM DIMMs depending on router model). 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, refer to the Cisco IOS
configuration guides and command references, located at:
Cisco Product Documentation > Cisco IOS Software > Cisco IOS Software Release you are using >
Configuration Guides and Command References
Cisco 2600 Series Routers Hardware Installation Guide
B-6
5V EDO DRAM DIMMs (Cisco 2610, Cisco 2611, Cisco 2612, Cisco 2613, Cisco 2620, and
Cisco 2621 routers)
3.3V SDRAM DIMMs (Cisco 26xxXM, Cisco 2650, Cisco 2651, and Cisco 2691 routers)
Cisco 2600 Series DRAM Memory Table
DRAM Capacity
32- to 64-MB EDO DRAM
32-to 128-MB SDRAM
64- to 256-MB SDRAM
Table B-1:
DRAM Type
5V
100-pin DIMM
3.3V
100-pin DIMM
3.3V
168-pin DIMM
Figure B-5.) Each socket can be filled with a 100-pin DRAM
Appendix B Maintaining the Router
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