03 路由器基本配置.ppt

路由器基本配置Basic Configuration of Router
深圳职业技术学院计算机系网络专业
教学目标( Objectives )
1. 路由器功能( Function of Router )
(ponents )

(HyperTerminal Session Properties)
4. Router配置模式
(Router Configuration Mode ) 
(Basic Configuration of Router)
Router功能(Function of Router )
Router是第三层的网络设备(Router is layer 3 device):
1. 路由选择和交换(Routing and Switching)
2. work Segment)
3. 流量控制(Flow Control)
4. 隔离广播(Isolate Broadcast)
5. 广域网连接(WAN Connection)
路由选择和交换(Routing and Switching)
work Segment)
广域网连接(WAN Connection)
路由器内部组成(Router ponents )
RAM/DRAM
、ARP缓存、快速交换表和包队列等
Stores routing tables, ARP cache, fast-switching cache, and packet hold queues;

RAM also provides temporary and/or running memory for a router's configuration file while the router is powered;

RAM content is lost during a power down or restart
非易失性RAM (NVRAM )

Non-volatile RAM stores the router's backup/startup configuration file;
2. 掉电或重启动NVRAM内容不丢失
NVRAM content is retained during power down or restart
Flash
,可重新编程的ROM,它存储操作系统映像文件和微代码
Erasable, reprogrammable ROM that holds the operating system image and microcode;
2. Flash可以软件升级,不需要更换芯片
Flash memory enables software updates without removing and replacing processor chips;

Flash content is retained during power down or restart;
4. Flash 可以存储多个版本的IOS软件
Flash memory can store multiple versions of IOS software