Chapter 1 Overview of Cisco 3700 Series Routers

Memory

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

Memory

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 1-1and Table 1-2list 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

 

 

 

 

Cisco 3700 Series Routers Hardware Installation Guide

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Cisco Systems 3700 Series manual Memory, Description Specification

3700 Series specifications

Cisco Systems 3700 Series routers are a pivotal part of Cisco's portfolio, designed for medium to large enterprises aiming to deliver secure and efficient networking capabilities. Introduced as a versatile solution, these routers provide a comprehensive blend of performance, scalability, and investment protection.

One of the standout features of the Cisco 3700 Series is its modular architecture, allowing organizations to customize their router according to specific needs. This modularity supports various modules for different functions, including voice, data, and video, making the 3700 Series an ideal choice for converged networking environments. Administrators can enhance functionality through an array of WAN and voice interface cards that adapt as the organization's needs evolve.

The 3700 Series is built on Cisco's IOS (Internetwork Operating System), ensuring robust and high-quality performance. It supports advanced routing protocols including EIGRP, OSPF, and BGP, facilitating efficient data transmission across diverse environments. This versatility helps organizations implement sophisticated multi-site connectivity and enables reliable performance in complex network scenarios.

Security is a paramount concern in modern networking, and the Cisco 3700 Series delivers with features such as integrated firewall services, VPN support, and intrusion detection capabilities. These security measures protect sensitive data and ensure secure communication between remote sites—critical in today’s cyber landscape.

Another key characteristic of the 3700 Series is its support for Quality of Service (QoS), which prioritizes time-sensitive traffic such as voice and video. By ensuring that critical applications receive the bandwidth they require, organizations can maintain the quality of service that their users expect.

Moreover, the Cisco 3700 Series is designed with redundancy in mind. Features like dual power supplies and hot-swappable fan trays enhance reliability and uptime, which are crucial for mission-critical applications.

Furthermore, energy efficiency is an increasingly important consideration in network design. The Cisco 3700 Series adheres to modern energy standards, helping reduce the overall carbon footprint while supporting high-performance capabilities.

In summary, the Cisco Systems 3700 Series routers stand out for their modularity, advanced routing capabilities, robust security features, and energy efficiency, making them an optimal choice for enterprises that not only need performance but also flexibility and reliability in their networking solutions. As businesses continue to evolve and adapt, the Cisco 3700 Series is a dependable partner in their connectivity journey, ensuring they can meet current demands while preparing for future challenges.