System Overview

The Cisco 3000 is a multiprotocol router in a fixed multiport configuration system that is ready for external network hardware connections. The network interface types include Token Ring, serial, Ethernet, and Basic Rate Interface (BRI).

Sections of this chapter follow:

• System Specifications

• Memory Configurations

Figure 1-1 and Figure 1-2 show the six available chassis models.

Figure 1-1: Router Configurations with Serial, Token Ring, and BRI Interface Options

Figure 1-2: Router Configurations with Ethernet, Serial, and BRI Interface Options

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Note This publication takes you through the initial hardware installation and selected maintenance procedures. For initial software configuration and operating information, refer to the Router Products Getting Started Guide or the Router Products Configuration and Reference publication.

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System Specifications

Design specifications of the router follow:

• Fixed, multiport router platform

• 20-megahertz (MHz) Motorola 68EC030 microprocessor

• Light-emitting diodes (LEDs) that indicate network activity

• Flash erasable programmable read-only memory (EPROMs) or Flash single in-line memory modules (SIMMs) for convenient software updating

• Dynamic random access memory (DRAM) SIMMs for convenient system memory expansion

Table 1-1 lists the system specifications of the various models.

System Specifications

Description	Design Specification
Dimensions W x D x H	13" x 14" x 4" (33 cm x 35.6 cm x 10 cm)
Weight	15 lb
Power	100/240 VAC VAC at 50-60 Hz 55W (max.) 273 Btu/hr
Processor	20-MHz Motorola 68EC030
Memory	4-MB processor DRAM (primary memory) (expandable to 16 MB) 1-MB boot ROM .5-MB1 shared memory 2-MB Flash (expandable) 32-KB nonvolatile configuration RAM
Network Interface Options	1 Token Ring and 1 synchronous serial (3202) 1 Ethernet and 1 BRI (3103) 2 Ethernet (3101) 1 Ethernet and 1 synchronous serial (3102) 1 Ethernet, 2 synchronous serial, and 1 BRI (3104) 1 Token Ring, 2 synchronous serial, and 1 BRI (3204)
BRI Interface	ISDN Basic Rate S/T (RJ-45)
Token Ring	802.5
Ethernet Interfaces	Ethernet (AUI) 802.3
Serial Interfaces2	RS-232, RS-449, V.35, X.21, NRZ/NRZI, DTE/DCE; EIA-530 DTE
Console Port	RS-232 DB-25 female connector
Auxiliary Port	RS-232 DB-25 male connector
Operating Environment	32-104×F (0-40×C )
Nonoperating Temperature	-40-185×F (-40-85×C)
Operating Humidity	5-95%, noncondensing
Noise Level	40 dBa

Table 1-2 lists the interface ports of different 3000 models.

Network Interface Options

Model	Ethernet	Token Ring	Serial	BRI
3101	2	0	0	0
3102	1	0	1	0
3103	1	0	0	1
3202	0	1	1	0
3104	1	0	2	1
3204	0	1	2	1

Memory Configurations

Model 3000 routers have the following memory systems:

• Primary memory (main memory)--Stores the running configuration and routing tables

• Shared memory--Used for packet buffering by the router's network interfaces

• Nonvolatile memory--Stores the system configuration file and the virtual configuration register

• Flash memory--Stores the operating system software image

• Boot ROM memory--Stores a subset of the operating system software image which is called the System Bootstrap image and the Bootstrap Program (ROM Monitor). The System Bootstrap image allows you to boot the router when Flash memory does not contain a valid system image.

The boot ROM prompt is as follows: Router(boot)>. The Bootstrap Program (ROM Monitor) prompt is the greater than sign (>).

(See Appendix B, "Virtual Configuration Register," and Appendix C, "Bootstrap Program.")

Table 1-3 shows possible memory configurations for the router.

Memory Configurations

Memory Type	Memory Capacity
Primary memory (main memory)	4 MB, expandable
Shared memory	.5 MB1
Nonvolatile memory	32 KB2
System Code memory (Flash)	2 MB, expandable
Boot ROMs	1 MB, expandable

No jumper or PAL changes are necessary to support different memory sizes, except for the boot ROM size differences.