Safety Recommendations - Cisco 4000 Series Upgrade Manual

•
Erasable programmable read-only memory (EPROM)–based memory—In the Cisco 4500,
Cisco 4500-M, Cisco 4700, and Cisco 4700-M routers only the ROM monitor image is
EPROM-based. The ROM monitor permits you to boot the Cisco IOS image from Flash memory
if a boot helper image is not present in boot Flash memory.
Figure 2
EPROM-based
ROM monitor
Table 1 lists the Cisco 4500, Cisco 4500-M, Cisco 4700, and Cisco 4700-M processor and memory
specifications.
Table 1
Description Cisco 4500
Processor 100-MHz IDT Orion
RISC
2
Main memory (DRAM ) 8 or 32 MB
Shared memory (DRAM) 4 or 16 MB
Flash memory 4, 8, 16, 32, or 64 MB
3
NVRAM 128 KB
4
Boot ROM 128 to 512 KB
Boot Flash 4, 8, or 16 MB
1. The Orion microprocessor is based on the MIPS R4400 and is pin-compatible.
2. DRAM = dynamic random-access memory.
3. NVRAM = nonvolatile random-access memory.
4. ROM = read-only memory.
Warning
AC units; disconnect the power at the circuit breaker on DC units.
Caution
have discharged all static electricity from your body before opening the chassis. Before performing
the procedures described in this document, review the following sections "Safety
Recommendations" and "Safety with Electricity."

Safety Recommendations

Follow these guidelines to ensure general safety:
•
Keep the chassis area clear and dust-free during and after installation.
•
Put the removed chassis cover in a safe place. Keep tools away from walk areas where you or
others could fall over them.
Cisco 4500, Cisco 4500-M, Cisco 4700, and Cisco 4700-M Memory Systems and Software
Images
Boot helper
Processor and Memory Specifications
Cisco 4500-M
100-MHz IDT Orion
1
RISC
8, 16, or 32 MB
4, 8, or 16 MB
4, 8, 16, 32, or 64 MB
128 KB
128 to 512 KB
4 to 16 MB
Before working on a chassis or working near power supplies, unplug the power cord on
To avoid damaging electrostatic discharge (ESD)–sensitive components, be sure you
Upgrading Cisco 4500, Cisco 4500-M, Cisco 4700, and Cisco 4700-M Memory
Flash memory based
Cisco IOS
(xboot)
Cisco 4700
133-MHz IDT Orion
RISC
16 or 32 MB
4, 8, or 16 MB
4, 8, 16, 32, or 64 MB
128 KB
128 to 512 KB
4 to 16 MB
Safety Recommendations
Cisco 4700-M
133-MHz IDT Orion
RISC
16, 32, or 64 MB
4, 8, or 16 MB
4, 8, 16, 32, or 64 MB
128 KB
128 to 512 KB
4 to16 MB
3