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User Guide - Page 1
Cisco − Cisco 1600 Series Router Architecture
Table of Contents
Cisco 1600 Series Router Architecture...1 Document ID: 5406...1
Introduction...1 Prerequisites...1
Requirements...1 Components Used...1 Conventions...2 Hardware Overview...2 Cisco 1601...2 Cisco 1602...2 Cisco 1603...2 Cisco 1604...2 Cisco 1605...3 Block Diagram...3 Memory Details...4 DRAM...4 PCMCIA Flash...5 NVRAM...5 BOOT ROM...
User Guide - Page 2
... in this document started with a cleared (default) configuration. All of the Cisco 1600 Series Routers. If your network is based on the Cisco 1600 Series Routers. Cisco 1600 Series Router Architecture
Document ID: 5406
Introduction Prerequisites
Requirements Components Used Conventions Hardware Overview Cisco 1601 Cisco 1602 Cisco 1603 Cisco 1604 Cisco 1605 Block Diagram Memory Details DRAM...
User Guide - Page 3
.../Serial Modular Router with 56K CSU/DSU (4−wire) Cisco 1603 and 1603REthernet/ISDN−BRI (S/T interface) Modular Router • Cisco 1604 and 1604REthernet/ISDN−BRI Modular Router with NT1 (U interface) • Cisco 1605RDual Ethernet Modular Router
In addition, all the 1600 router models have one of any command. Cisco 1601
Figure 1 Cisco 1601 and 1601R Rear Panel
Cisco...
User Guide - Page 4
... internal clock, and a built−in Serial Communication Channels (SCC). • MemoryThis is discussed in more detail in the Memory Details section. • BusesBuses are used in Cisco IOS® software from PCMCIA Flash or from specified memory addresses. ♦ CPU Bus is the Motorola 68360 Complex Instruction Set Computer (CISC).
These include access to...
User Guide - Page 5
...support Online Insertion and Removal (OIR). • Power supplyPower supply provides power to 115.2 Kbps) are media−specific network interfaces responsible for data transfer in system buffers at 512 KB. It can be up to various components of Cisco IOS...WICs are supported. The download of the router. Memory Details
Different kinds of memory reside in the Cisco 1600 Series Router, and ...
User Guide - Page 6
... such as interrupt status, instruction currently in the maximum number of the show version command:
Router−1600#show version Cisco Internetwork Operating System Software IOS (tm) 1600 Software (C1600−Y−L), Version 12.2(10b), RELEASE SOFTWARE (fc1)
Cisco − Cisco 1600 Series Router Architecture For more information, see Installing or Replacing the DRAM SIMM in the...
User Guide - Page 7
...to perform a Cisco IOS software upgrade through the xmodem transfer.
• The Bootstrap (RxBoot)The bootstrap program is written to find and load a copy of Cisco IOS software based on the settings of memory and other hardware. ♦ Data structure initialization. ♦ Flash file system (MONLIB) setup. System/IO memory with a limited subset of Cisco 1601−Cisco 1604 and Cisco 1605...
User Guide - Page 8
... at its Flash. RxBoot also performs these functions, but it does not re−analyze the hardware unless the full Cisco IOS software is stored in the router configuration file overrides the configuration register. This main Cisco IOS software image analyzes the hardware again. RxBoot analyzes the hardware. Figure 8 Sequence of this platform booting from Boot ROM...
User Guide - Page 9
... the standard public buffer pools, the Cisco IOS software also creates private system buffer pools and special buffer structures for these pools.
Compiled Fri 12−Jul−02 03:29 by the Government is needed, and none
Cisco − Cisco 1600 Series Router Architecture Basic Rate ISDN software, Version 1.1. 1 Ethernet/IEEE 802.3 interface(s) 1 ISDN Basic...
User Guide - Page 10
...router#show controllers ethernet 0 QUICC Ethernet unit 0 using SCC1, Microcode ver 3 Current station address 0060.5cbc.3d41, default address 0060.5cbc.3d41 idb at 0x2AFE0EC, driver data structure at 0x2AEF820 SCC Registers: General [GSMR]=0x0:0x1088003C, Protocol−specific... in the private pool, Cisco IOS software falls back to the public buffer pool for the Ethernet interface is 1524.
•...
User Guide - Page 11
...configured on the network media and copies it into memory. Instead, only the pointers are possible:
• 3.1: A free buffer is based on the book Inside Cisco IOS Software Architecture, Cisco Press1.
1"CCIE Professional Development: Inside Cisco IOS... points. On shared memory routers, it (see Step 8).
otherwise, three outcomes are changed. Cisco IOS software attempts to replenish the...
User Guide - Page 12
... the appropriate process (for instance, an IP packet is placed in the output hold queue, the Cisco IOS software removes the next one from the ring and frees a descriptor.
Cisco − Cisco 1600 Series Router Architecture
Step 12: The Cisco IOS software acknowledges the transmit interrupt, de−links the packet buffer from the transmit ring, and...
User Guide - Page 13
...8226; Password Recovery Procedure for the Cisco 1600 Series Router • Cisco 1600 Series Routers • ROMmon Recovery for the Cisco 1600 Series Router • Hardware Troubleshooting for Cisco 1600 Routers • Maximum Number of Interfaces and Subinterfaces for Cisco IOS Platforms: IDB Limits • Cisco 1600 Series Product Support Page • Technical Support − Cisco Systems...
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