Cisco Systems 520 manual Router Memory, Router Hardware Security, Feature Summary, Flash Memory

Chapter 1 Product Overview

Hardware Features

Router Memory

The Cisco Secure Router 520 Series routers support the following types of memory:

•Flash Memory

•SDRAM

Flash Memory

Flash memory stores the image of the ROMMON boot code, the Cisco IOS software, and the router configuration file. By default, the router ships with 36 MB of flash memory, with no option for expansion. The router has enough memory to support the Cisco IOS Advanced IP Services image.

SDRAM

SDRAM stores the Cisco IOS software and provides memory for data that is created during packet processing. The router provides 128 MB of onboard SDRAM.

Router Hardware Security

Each Cisco Secure Router 520 Series router has a Kensington security slot on the back panel. To secure the router to a desktop or other surface, use the Kensington lockdown equipment.

Feature Summary

	Table 1-2summarizes the features of the Cisco Secure Router 520 Series routers.
Table 1-2	Cisco Secure Router 520 Series Feature Summary
Feature		Description
Security features		Provides advanced security features, including secure VPN access and
		comprehensive threat defense with Cisco IOS Firewall, IPS, and URL filtering. The
		Cisco Secure Router 520 Series routers also provides dynamic routing and
		advanced QoS features.
IPsec hardware accelerator		The security processor implements symmetric key encryption, public key
		encryption, authentication, and data compression in hardware.
Integrated 802.11b/g radio module		(Wireless routers only) Provides connectivity to a wireless LAN using IEEE
		802.11b/g standards. Enables the router to act as an access point (AP) in
		infrastructure mode.
Flash memory		36 MB of flash memory (default) with no option for expansion. The router has
		enough memory to support the Cisco IOS Advanced IP Services image.
SDRAM		128 MB of SDRAM on board.
Dying gasp		Detects whether the router is about to lose power, and then sends a signal to warn
		the digital subscriber line access multiplexer (DSLAM) about the impending line
		drop.

Cisco Secure Router 520 Series Hardware Installation Guide

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