PMC-Sierra 3600 User Manual

This section describes the various types of memory that may be present in a Cisco 3600 series router.

Cisco 3600 series routers support the following types of memory:

DRAM or SDRAM—Stores the running configuration and routing tables, and is used for packet
buffering by the router’s network interfaces. The Cisco IOS software executes from DRAM.

Nonvolatile random-access memory (NVRAM)—Stores the system configuration file and the virtual
configuration register. (For more information, see

)

Flash memory—Stores the operating system software image. You can also add Flash memory on
PCMCIA cards and compact Flash cards, depending on the router.

EPROM-based memory—Stores the ROM monitor, which allows you to boot an operating system
software image from Flash memory or PCMCIA memory.

For information about installing DRAM, SDRAM, NVRAM, and Flash memory SIMMs, refer to the
following hardware configuration note:

For information about installing Flash memory PCMCIA cards, refer to the following hardware
configuration note:

For information about installing compact Flash memory cards, refer to the following hardware
configuration note:

 through

 list processor and memory specifications for the routers.

Processor

80-MHz IDT

1

 R4700 RISC

1.

IDT = Integrated Device Technology.

DRAM (main plus shared)

4 to 64 MB

NVRAM

32 KB

Flash memory (SIMM)

4 to 32 MB

Flash memory (PCMCIA)

2 to 40 MB

Boot ROM

512 KB