协议的选择
由于最初局域网并没先出标准后出产品,所以很多厂商如Apple和IBM都提出了自己的标准,产生了如AppleTalk和IBM协议,Novell公司的网络操作系统运行IPX/SPX协议,在连接这些异构网络时需要路由器对这些协议提供支持。Intel9100系列和9200系列的路由器可提供免费支持,3Com的系列路由产品也提供较广泛的协议支持。
路由器作为网络设备中的“黑匣子”,工作在后台。用户选择路由器时,多从技术角度来考虑,如可延展性、路由协议互操作性、广域数据服务支持、内部ATM支持、SAN集成能力等。另外,选择路由器还应遵循如下基本原则:即标准化原则、技术简单性原则、环境适应性原则、可管理性原则和容错冗余性原则。对于高端路由器,更多的还应该考虑是否和如何适应骨干网对网络高可靠性、接口高扩展性以及路由查找和数据转发的高性能要求。高可靠性、高扩展性和高性能的“三高”特性是高端路由器区别于中、低端路由器的关键所在。
CISCO路由器初始配置简介
很多初学路由器知识的网友对路由器的初始配置可能感到很陌生,本人在初学时也很困惑,因为一下出来很多提问不知如何是好,下面将最近刚调试的一台CISCO3640的初始配置整理出来与各位网友交流,如有疏漏之处,还请大家指正。
1.用CISCO随机带CONSOLE线,一端连在CISCO路由器的CONSOLE口,一端连在计算机的COM口。
2.打开电脑,启动超级终端.为您的连接取个名字,比如CISCO_SETUP,下一步选定连接时用COM1,下一步选定第秒位数9600,数据位8,奇偶校验无,停止位1,数据流控制无.最后选确定。
3.打开路由器电源,这时超级终端将出现以下画面:
System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.C3600 processor with 32768 Kbytes of main memory Main memory is configured to 64 bit mode with parity disabled
program load complete, entry point: 0x80008000, size: 0x4ed478 Self decompressing the image :
Restricted Rights Legend
Use, duplication, or disclosure by the Government is
subject to restrictions as set forth in subparagraph
(c) of the Commercial Computer Software - Restricted
Rights clause at FAR sec. 52.227-19 and subparagraph
(c) (1) (ii) of the Rights in Technical Data and Computer
Software clause at DFARS sec. 252.227-7013.
cisco Systems, Inc.
170 West Tasman Drive
San Jose, California 95134-1706
Cisco Internetwork Operating System Software
IOS (tm) 3600 Software (C3640-I-M), Version 12.1(2)T, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2000 by cisco Systems, Inc.
Compiled Tue 16-May-00 12:26 by ccai
Image text-base: 0x600088F0, data-base: 0x60924000
cisco 3640 (R4700) processor (revision 0x00) with 24576K/8192K bytes of memory.
Processor board ID 25125768
R4700 CPU at 100Mhz, Implementation 33, Rev 1.0
Bridging software.
X.25 software, Version 3.0.0.
2 FastEthernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
DRAM configuration is 64 bits wide with parity disabled.
125K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read/Write)
--- System Configuration Dialog ---
Would you like to enter the initial configuration dialog? [yes/no]: y
您是否进入初始化配置对话,选Y
At any point you may enter a question mark '?' for help.
Use ctrl-c to abort configuration dialog at any prompt.
Default settings are in square brackets '[]'.Basic management setup configures only enough connectivity
for management of the system, extended setup will ask you
to configure each interface on the system
Would you like to enter basic management setup? [yes/no]: n