Cisco 1600 User Manual Page 1

Table of ContentsCisco 1600 Series Router Architecture...

is available in the private pool, Cisco IOS software falls back to the public buffer pool for the size thatmatches the maximum transmission unit (MTU)

interface.Switching PathsThis description is based on the book Inside Cisco IOS Software Architecture, Cisco Press1.1"CCIE Professional Developme

If there is no CEF entry for the destination, the packet is dropped.5.2: Fast switchingIf CEF is not enabled or the packet cannot be CEF switched, th

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Cisco 1600 Series Router ArchitectureDocument ID: 5406IntroductionPrerequisites Requirements Components Used ConventionsHardware Overvi

that you understand the potential impact of any command.ConventionsFor more information on document conventions, refer to the Cisco Technical Tips Con

Cisco 1605Figure 5  Cisco 1605R Rear PanelBlock DiagramFigure 6 represents the basic block diagram of the 1600 router.Figure 6  Basic Block Diagram

Universal Asynchronous Receiver−Transmitter (UART)UART is an SCC integrated on theM68360. It provides the necessary user interface. It has one RS232

MB. If SIMM is with parity, total DRAM can be up to 16 MB (on−board 2 MB will be disabled).Note: The Cisco 1605−R Series Router has 8 MB on−board. The

Copyright (c) 1986−2002 by cisco Systems, Inc.Compiled Fri 12−Jul−02 03:29 by pwadeImage text−base: 0x0803A50C, data−base: 0x02005000 ROM: System Boot

Based on the configuration register value in Non−Volatile RAM (NVRAM), the router either stays inROMmon, or RxBoot is executed from Boot ROM.RxBoot an

C1600 processor with 6144 Kbytes of main memoryprogram load complete, entry point: 0x4018060, size: 0x1da950 Restricted Rights Legend