Cisco Systems 3700 User Manual 2
CHAPTER
1
Overview of Cisco 3700 Series Routers
Cisco 3700 series routers are modular access routers with LAN and WAN connections that can be
configured by means of interchangeable network modules and interface cards.
This chapter describes the features and specifications of the routers and includes the following sections:
• Hardware Features, page 1-1
• Modules, Interface Cards, and Memory, page 1-3
• Memory, page 1-4
• Interface Numbering, page 1-5
• Power Supply Options, page 1-9
• System Specifications, page 1-11
• Regulatory Compliance, page 1-12
Hardware Features
Cisco 3700 series includes the Cisco 3725 and the Cisco 3745 routers, which provide the following
features:
• Cisco 3700 CompactFlash memory cards
• Advanced integration module (AIM) slots
• Support for double-wide network modules
• Two sockets for synchronized DRAM (SDRAM)
• User-configurable memory (shared memory or processor memory)
• Two Fast Ethernet ports
• High-speed console and auxiliary ports (up to 115.2 kbps)
Cisco 3725
Cisco 3725 routers include the following additional features:
• High-performance 240-MHz Reduced Instruction Set Computer (RISC) processor
• Up to 256 MB SDRAM
• Up to 128 MB CompactFlash memory
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Hardware Features
Chapter 1 Overview of Cisco 3700 Series Routers
• Two slots for network modules, one of which can accommodate a double-wide network module
• Three interface card slots
• Two Cisco 3700 CompactFlash slots (one external and one internal)
• Two AIM slots
• Installation in a 19- or 23-inch rack or on a desk
• Support for Cisco Redundant Power System
• 2-rack unit (RU) chassis height
Figure 1-1 shows the rear panel of the Cisco 3725 router.
Figure 1-1 Rear Panel of the Cisco 3725 Router
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1 Double-wide network module slot 6 CompactFlash memory card slot
2 Interface card slots 7 Fast Ethernet 0/0 port
3 Power supply 8 Fast Ethernet 0/1 port
4 Auxiliary port 9 Single-wide network module slot
5 Console port
Cisco 3745 routers include the following additional features:
• High-performance 350-MHz RISC processor
• Up to 256 MB SDRAM
• Up to 128 MB CompactFlash memory
• Four slots for network modules that can accommodate up to two double-wide network modules
• Three interface card slots
• Two Cisco 3700 CompactFlash memory card slots (one external and one internal)
• Two AIM slots
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Chapter 1 Overview of Cisco 3700 Series Routers
• Installation in a 19- or 23-inch rack or on a desk
• Support for Cisco Redundant Power System
• 3-rack unit (RU) chassis height
Figure 1-2 shows the rear panel of the Cisco 3745 router.
Figure 1-2 Rear Panel of the Cisco 3745 Router
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Modules, Interface Cards, and Memory
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1 Interface card slots 6 Cisco 3700 CompactFlash memory card slot
2 Network modules 7 Auxiliary port
3 Power supply 8 Console port
4 Fast Ethernet 0/0 port 9 Power supply
5 Fast Ethernet 0/1 port 10 Network modules
Modules, Interface Cards, and Memory
• For information on installing network modules, see the following documents:
• Quick Start Guide: Network Modules for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700
Series Routers
• Cisco Network Modules Hardware Installation Guide
For information on installing WICs and VICs, see the following documents:
• Quick Start Guide: Interface Cards for Cisco 1600, 1700, 2600, 3600, and 3700 Series
• Cisco Interface Cards Hardware Installation Guide
For information on installing AIMs, see the following documents:
• AIM Installation Quick Start Guide: Cisco 2600, Cisco 3600, and Cisco 3700 Series
• Installing Advanced Integration Modules in Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700
Series Routers
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Memory
Memory
Chapter 1 Overview of Cisco 3700 Series Routers
For information on installing DRAM, SDRAM, NVRAM, and CompactFlash memory, see:
• Upgrading System Memory in Cisco 3700 Series Routers
• Installing Field-Replaceable Units in Cisco 3745 Routers
For information on installing CompactFlash memory cards, see:
• Installing and Formatting Cisco 2691, Cisco 3631, and Cisco 3700 CompactFlash Memory Cards
Cisco 3700 series routers support the following types of memory:
• SDRAM—Stores the running configuration and routing tables and is used for packet buffering by
the network interfaces. Cisco IOS software executes from SDRAM memory.
• NVRAM—Stores the system configuration file and virtual configuration register. For more
information, see Appendix C, “Configuration Register.” CompactFlash memory—Stores the
operating system software image. You can increase CompactFlash memory by adding Cisco 3700
CompactFlash memory cards. See the Installing and Formatting Cisco 3631 and Cisco 3700
CompactFlash Memory Cards document.
• EPROM-based memory—Stores the ROM monitor, which allows you to boot an operating system
software image from internal or external CompactFlash memory.
Table 1-1 and Table 1-2 list processor and memory specifications for Cisco 3700 series routers.
Table 1-1 Cisco 3725 Router Processor and Memory Specifications
Description Specification
Processor 240-MHz PMC-Sierra RM7061A RISC processor
SDRAM 128–256 MB
NVRAM 56 KB
CompactFlash 32, 64, or 128 MB
Boot ROM 512 KB
Table 1-2 Cisco 3745 Router Processor and Memory Specifications
Description Specification
Processor 350-MHz PMC-Sierra RM7000A RISC processor
SDRAM 128–256 MB
NVRAM 152 KB
CompactFlash 32, 64, or 128 MB
Boot ROM 704 KB
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