
7
Upgrading System Memory in Cisco 3600 Series Routers
78-3636-05
Memory Configurations
Cisco Flash Memory
Cisco IOS software on Cisco 3600 routers is stored as follows:
• Cisco 3631: In an internal compact Cisco Flash memory card. Memory cards come with 32-, 64-,
or 128-MB of memory.
• Cisco 3620, Cisco 3640, and Cisco 3660: In one or two Cisco Flash memory SIMMs.
To examine current Cisco Flash memory status, do the following:
— 64 MB 96 MB
64 MB —
128 MB — 128 MB
64 MB 64 MB
— 128 MB
— 128 MB 160 MB
128 MB —
64 MB 128 MB 192 MB
128 MB 64 MB
128 MB 128 MB 256 MB
Table 6 SDRAM Configurations for Cisco 3660 Routers
Bank 0 (DIMM 0) Bank 1 (DIMM 1) Total Memory
2Mx64 2Mx64 32 MB
4Mx64 —
4Mx64 2Mx64 48 MB
4Mx64 4Mx64 64 MB
8Mx64 —
8Mx64 2Mx64 80 MB
8Mx64 4Mx64 96 MB
8Mx64 8Mx64 128 MB
16Mx64 —
16Mx64 2Mx64 144 MB
16Mx64 4Mx64 160 MB
16Mx64 8Mx64 192 MB
16Mx64 16Mx64 256 MB
Table 5 SDRAM Configurations for Cisco 3631 Routers (continued)
Bank 0 (DIMM 0) Bank 1 (DIMM 1) Total Memory
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