cisco路由器学习资料243622

Body Text,Second Level,Third Level,Fourth Level,Fifth Level,Slide Title, 1999,Cisco Systems, Inc.,UTStarcom-2-,79,Slide Title,Body Text,Second Level,Third Level,Fourth Level,Fifth Level,67,Cisxo Education Solution,UT A,培通用课程之一,CISCO,网络技术,课程内容,配接,CISCO,设备的线缆及接法,CISCO,IOS,及,路由器的基本配置,CISCO,配置文件,CISCO CDP,协议简介,物理层,数据链路层,(MAC,子层),物理层实现多种多样,有些物理层实现方式支持多种物理介质,Ethernet,100,baseTX,10,BaseT,802.3,10,Base5,10,Base2,100,baseFX,802.3 说明了,10mb,以太网规范,802.3,u,说明了,100mb,(,快速) 以太网规范,100,baseT4,10,BaseF,DIX,标准,LAN,的物理层实现,10,Base5,100,BaseTX,10,BaseT,100,BaseFX,使用介质,最大段长,拓扑类型,连接器,50-欧姆 同轴电缆,(,粗),500 米,总线,100米,星形,星形,点到点,EIA/TIA 3, 4, 5,类双绞线,2,对,EIA/TIA,5,类双绞线,2,对,62.5/125,微米多模光纤,AUI,ISO 8877,(RJ-45),双工型介质接口连接器,(MIC) ST,ISO 8877,(RJ-45),400米,100米,以太网介质比较,UTP,设备,RJ-45,连接器,1,8,8,线对,4 R4,1,2,3,4,5,6,7,线对,T,代表发送,R,代表接收,线对2,T2,线对,2 R2,线对,3 T3,线对,1 R1,线对,1 T1,线对,3 R3,线对,4 T4,针,UTP,实现直连线,两端的线序相同,针 线,1RD+,2RD-,3TD+,4NC,5NC,6TD-,7NC,8NC,直连10,BaseT/100BaseT,针 线,1TD+,2TD-,3RD+,4NC,5NC,6RD-,7NC,8NC,服务器/路由器,8,1,棕,白,蓝,白,棕,蓝,绿,绿,白,橙,橙,白,1,8,直连线,8,1,集线器,/,交换机,8,1,棕,白,蓝,白,棕,蓝,绿,绿,白,橙,橙,白,UTP,实现交叉线,部分线序交叉,8,1,交叉连接10,BaseT/100BaseT,针 线,1RD+,2RD-,3TD+,4NC,5NC,6TD-,7NC,8NC,针 线,1RD+,2RD-,3TD+,4NC,5NC,6TD-,7NC,8NC,交叉线,1,8,1,8,8,1,集线器/交换机,集线器/交换机,棕,白,棕,蓝,绿,绿,白,橙,白,蓝,白,橙,棕,白,橙,白,蓝,白,棕,绿,橙,绿,白,蓝,UTP,直连线与交叉线对比,两个端口均标有或均没标有“,X”,时用交叉线.,有且仅有一个端口标记有“,X”,时使用直连线.,1,x,2,x,3,x,4,x,1,x,2,x,3,x,4,x,1,x,2,x,3,x,4,x,连接典型网,决定使用,10mb,或,100mb,的物理介质,指明需要使用什么线类,确认面板上的端口，查看是否标记“,X”,指明需要使用交叉线或直连线,100,Mbps,5,类交叉线,10,Mbps,3, 4, 5,类交叉线,100,Mbps,5,类直连线,10,Mbps,3, 4, 5,类直连线,10,Mbps,3, 4, 5,类直连线,连接到路由器,通过,CSU/DSU,接入网络,EIA/TIA-232,EIA/TIA-449,EIA-530,V.35,X.21,CSU/DSU,端接用户设备,DTE,DCE,服务商,区分不同的,WAN,串行连接器,Data Terminal Equipment,数据终端设备,WAN,连接中用户方的最后设备,Data Communications Equipmen,数据通讯设备,WAN,服务商方的最后通讯设备,DCE,提供时钟,DCE,DTE,调制解调器,通道服务单元/,数据服务单元,S,S,S,S,S,S,DTE,DTE,DCE,DCE,串行连接中的,DTE,和,DCE,比较,DTE/DCE,责任分界点,控制口,1603 路由器,背板一览,AUI,以太网口,10BaseT,以太网口,ISDN BRI S/T,WAN,串口可以采用模块化方式,3640 路由器,背板一览,模块化端口,模块,WAN,接口卡,课程内容,配接,CISCO,设备的线缆及接法,CISCO IOS,及,路由器的配置,CISCO,配置文件,CISCO CDP,协议简介,PCs,需要一个将,RJ-45,转换到,DB-9,或,DB-25,的转换器,通讯口设置为,9600,波特率, 8,个数据位,不设奇偶校验位, 1,个停止位,不设流量控制,这是通过控制口的一种管外管理方式,AUX,端口用于调制解调器的远程连接访问,控制台连接,带控制口的设备,创建超级终端（,II,）,选择串口（,III,）,端口设置（,IV,）,可以通过多种途径来配置,配置直接在设备的内存中生效,控制端口,Aux,端口,端口,PC or Unix,服务器,Web,或网络管,理服务器,虚拟终端,多种途径的配置,Telnet,TFTP,Cisco IOS,软件提供多种网络服务进而支持各种网络应用,.,Cisco,互连网操作系统,(IOS),软件,提供命令行界面,在不同的网络设备上运行时有差别,在命令模式下可以键入或粘贴命令,键入命令后回车，设备即解析和执行所键入的命令,两个主要命令模式是用户模式和特权模式,不同的命令模式有不同的提示符,Cisco,IOS,Cisco IOS,用户界面的基本特性,用户模式,对交换机和路由器的有限操作,命令提示符为,主机名,主要有两个命令模式提供命令键入.,模式一:,Cisco IOS,的主要命令模式,特权,(,或,enabled),模式,对交换机和路由器更深入的操作,有配置和监视权力,是进入其它配置模式的前提,命令提示符为,主机名,#,模式二,(,也是最常用的模式):,Cisco IOS,的主要命令模式(续),Console,wg_ro_c,wg_ro_c,enable,wg_ro_c#,wg_ro_c#,disable,wg_ro_c,wg_ro_c,logout,wg_ro_c con0 is now available,Press RETURN to get started.,用户模式提示,特权模式提示,登入路由器,路由器在用户模式下的命令清单,wg_ro_c,?,Exec commands:,access-enable Create a temporary Access-List entry atmsig Execute Atm Signalling Commands cd Change current device clear Reset functions connect Open a terminal connection dir List files on given device disable Turn off privileged commands disconnect Disconnect an existing network connection enable Turn on privileged commands exit Exit from the EXEC help Description of the interactive help system lat Open a lat connection lock Lock the terminal login Log in as a particular user logout Exit from the EXEC- More -,wg_ro_c#?,Exec commands:,access-enable Create a temporary Access-List entry,access-profile Apply user-profile to interface,access-template Create a temporary Access-List entry,bfe For manual emergency modes setting,cd Change current directory,clear Reset functions,clock Manage the system clock,configure Enter configuration mode,connect Open a terminal connection,copy Copy from one file to another,debug Debugging functions (see also undebug),delete Delete a file,dir List files on a filesystem,disable Turn off privileged commands,disconnect Disconnect an existing network connection,enable Turn on privileged commands,erase Erase a filesystem,exit Exit from the EXEC,help Description of the interactive help system,- More -,路由器在特权模式下的命令清单,只要输入部分命令串(唯一表示某个命令)，紧接着按,tab,键就可以完整地输入一个命令,路由器命令行帮助机制,上下文关联帮助,错误信息提示,指出所输入交换机命令的错误所在，以便于修改或纠正,.,可以重新调出一个较长或较复杂的命令或其它内容，用来再次运行、查看或修改,.,之前命令保存区,提供命令清单和与特定命令相关联的参数,.,路由器的上下文相关联帮助,Router#,clok,Translating CLOK,%,Unknown command or computer name, or unable to find computer address,Router#,cl?,clear clock,Router#,clock,%,Incomplete command.,Router#,clock ?,set Set the time and date,Router#,clock set,%,Incomplete command.,Router#,clock set ?,hh:mm:ss Current Time,符号解析,命令提示,调出最近用过的内容,路由器的上下文相关联帮助(续,),Router# clok,Translating CLOK,%,Unknown command or computer name, or unable to find computer address,Router#,clear clock,Router#,%,Incomplete command.,Router#,set Set the time and date,Router#,%,Incomplete command.,Router#,hh:mm:ss Current Time,Router#,clock set 19:56:00,%,Incomplete command.,Router#,clock set 19:56:00 ?,Day of the month,MONTH Month of the year,Router#,clock set 19:56:00 04 8,%,Invalid input detected at the marker,Router#,clock set 19:56:00 04 August,%,Incomplete command.,Router#,clock set 19:56:00 04 August ?,Year,命令提示,语法检查,命令提示,RouterShape the future of internetworking by creating unpreced,使用增强的编辑命令,“Shape the future of internetworking by creating unprecedented value for customers, employees, and partners.”,上述文字段在输入时会超出一行,Router,$,future of internetworking by creating unprecedented op,使用增强的编辑命令,(一行中长字串会自动滚卷,).,RouterShape the value of internetworking by creating unpreced,使用增强的编辑命令,(一行中长字串会自动滚卷,).,光标移动到命令行的开始位置,.,Router,$,value for customers, employees, and partners.,使用增强的编辑命令,(一行中长字串会自动滚卷,).,光标移动到命令行的开始位置,.,光标移动到命令行的结束位置,.,使用增强的编辑命令,(一行中长字串会自动滚卷,).,光标移动到命令行的开始位置,.,光标移动到命令行的结束位置,.,回移一个单词,Router,$,value for customers, employees, and partners.,使用增强的编辑命令,(一行中长字串会自动滚卷,).,光标移动到命令行的开始位置,.,光标移动到命令行的结束位置,.,回移一个单词.,下移一个字符.,Router,$,value for customers, employees, and partners.,使用增强的编辑命令,(一行中长字串会自动滚卷,).,光标移动到命令行的开始位置,.,光标移动到命令行的结束位置,.,回移一个单词,下移一个字符.,回移一个字符.,Router,$,value for customers, employees, and partners.,使用增强的编辑命令,(一行中长字串会自动滚卷,).,光标移动到命令行的开始位置,.,光标移动到命令行的结束位置,.,回移一个单词,下移一个字符.,回移一个字符.,下移一个单词,Router,$,value for customers, employees, and partners.,(一行中长字串会自动滚卷,).,光标移动到命令行的开始位置,.,光标移动到命令行的结束位置,.,回移一个单词,下移一个字符.,回移一个字符.,下移一个单词,使用增强的编辑命令,删除当前字符,Router,$,value for customers, employees, and partners.,Ctrl-P or Up arrow,调出最近,(,前一,),使用过的命令,Ctrl-N or Down arrow,调出更近使用过的命令,Router show history,显示命令保存区内容,Router terminal history size,lines,设置命令保存区大小,回览之前用过的命令,show version,命令,wg_ro_a#,show version,Cisco Internetwork Operating System Software,IOS (tm) 2500 Software (C2500-JS-L), Version 12.0(3), RELEASE SOFTWARE (fc1),Copyright (c) 1986-1999 by cisco Systems, Inc.,Compiled Mon 08-Feb-99 18:18 by phanguye,Image text-base: 0x03050C84, data-base: 0x00001000,ROM: System Bootstrap, Version 11.0(10c), SOFTWARE,BOOTFLASH: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0(10c), RELEASE SOFTWARE(fc1),wg_ro_a uptime is 20 minutes,System restarted by reload,System image file is flash:c2500-js-l_120-3.bin,(output omitted),-More-,Configuration register is 0x2102,查看配置情况,控制台,IOS,Setup utility,show,startup-config,show,running-config,将配置参数保存到,NVRAM,中,Config,Config,RAM,NVRAM,show running,和,show startup,命令,wg_ro_c#show,startup-config,Using 1359 out of 32762 bytes,!,version 12.0,!,- More -,wg_ro_c#show,running-config,Building configuration.Current configuration:!version 12.0,!,- More -,保存在,NVRAM,中,保存在,RAM,中,显示当前运行的和保存的配置情况,路由器模式一览,Router(config)#,Routerenable,Router#config term,Exit,Ctrl-Z (end),用户模式,特权模式,全局配置模式,配置模式,模式提示,InterfaceRouter(config-if)#,Subinterface Router(config-subif)#,Controller Router(config-controller)#,LineRouter(config-line)#,RouterRouter(config-router)#,IPX router Router(config-ipx-router)#,保存配置,wg_ro_c#,wg_ro_c#,copy running-config startup-config,Destination filename startup-config?,Building configuration,wg_ro_c#,将当前运行的配置复制到,NVRAM,中,配置路由器的各种标识,为路由器或其端口设置标识或信息,路由器名,Router(config)#,hostname agan,agan(config)#,开机时的固定显示信息,Agan(config)#,banner motd #,Accounting Department,You have entered a secured,system. Authorized access,only!,#,配置路由器的各种标识,为路由器或其端口设置标识或信息,路由器名,Router(config)#,hostname agan,agan(config)#,开机时的固定显示信息,agan(config)#,banner motd #,Accounting Department,You have entered a secured,system. Authorized access,only!,#,端口描述,agan(config)#,interface ethernet 0,agan(config-if)#,description Engineering LAN, Bldg. 18,Router(config)#,line console 0,Router(config-line)#,login,Router(config-line)#,password cisco,控制台密码,虚拟终端密码,Router(config)#,line vty 0 4,Router(config-line)#,login,Router(config-line)#,password richagan,路由器密码配置,Router(config)#,line console 0,Router(config-line)#,login,Router(config-line)#,password cisco,控制台密码,虚拟终端密码,Router(config)#,line vty 0 4,Router(config-line)#,login,Router(config-line)#,password richagan,特权模式明文密码,Router(config)#,enable password cisco,特权模式加密密码,Router(config)#,enable secret sanfran,路由器密码配置,Router(config)#,interface,type number,Router(config-if)#,端口配置,type,包括,serial, ethernet, token ring, fddi, hssi, loopback, dialer, null, async, atm, bri, and tunnel,number,用来识别具体的单个端口,Router(config-if)#,exit,从当前端口配置模式退出,Router(config)#,interface,type slot/port,Router(config-if)#,模块化端口的表示法,配置串口,进入全局配置模式,Router(config)#,interface serial 0,Router(config-if)#,Router#,configure term,Router(config)#,指定某个端口,配置串口,进入全局配置模式,Router(config-if)#,clock rate 64000,Router(config-if)#,Router(config)#,interface serial 0,Router(config-if)#,Router#,configure term,Router(config)#,Router(config-if)#,bandwidth 64,Router(config-if)#,exit,Router(config)#,exit,Router#,指定某个端口,设置时钟频率,(,只在,DCE,端,),调协波特率,(,建议),Router#,show interface serial 0,Serial0 is up, line protocol is up,Hardware is HD64570,Internet address is 10.140.4.2/24,MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, rely 255/255, load 1/255,Encapsulation HDLC, loopback not set, keepalive set (10 sec),Last input 00:00:09, output 00:00:04, output hang never,Last clearing of show interface counters never,Input queue: 0/75/0 (size/max/drops); Total output drops: 0,Queueing strategy: weighted fair,Output queue: 0/1000/64/0 (size/max total/threshold/drops),Conversations 0/1/256 (active/max active/max total),Reserved Conversations 0/0 (allocated/max allocated),5 minute input rate 0 bits/sec, 0 packets/sec,5 minute output rate 0 bits/sec, 0 packets/sec,(,output omitted),确认参数修改情况,开启或关闭端口,Router#,configure term,Router(config)#,interface serial 0,Router(config-if)#,no shutdown,%LINK-3-UPDOWN: Interface Seria0, changed state to up,%LINEPROTO-5-UPDOWN: Line Protocol on Interface Serial0, changed state to up,开启已经关闭的端口,Router#,configure term,Router(config)#,interface serial 0,Router(config-if)#,shutdown,%LINK-5-CHANGED: Interface Serial0, changed state to administratively down,%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state to down,人工关闭端口,路由器的,show interfaces,命令,Router#,show interfaces,Ethernet0 is up, line protocol is up,Hardware is Lance, address is 00e0.1e5d.ae2f (bia 00e0.1e5d.ae2f),Internet address is 10.1.1.11/24,MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, rely 255/255, load 1/255,Encapsulation ARPA, loopback not set, keepalive set (10 sec),ARP type: ARPA, ARP Timeout 04:00:00,Last input 00:00:07, output 00:00:08, output hang never,Last clearing of show interface counters never,Queueing strategy: fifo,Output queue 0/40, 0 drops; input queue 0/75, 0 drops,5 minute input rate 0 bits/sec, 0 packets/sec,5 minute output rate 0 bits/sec, 0 packets/sec,81833 packets input, 27556491 bytes, 0 no buffer,Received 42308 broadcasts, 0 runts, 0 giants, 0 throttles,1 input errors, 0 CRC, 0 frame, 0 overrun, 1 ignored, 0 abort,0 input packets with dribble condition detected,55794 packets output, 3929696 bytes, 0 underruns,0 output errors, 0 collisions, 1 interface resets,0 babbles, 0 late collision, 4 deferred,0 lost carrier, 0 no carrier,0 output buffer failures, 0 output buffers swapped out,Router#,show interfaces serial 1,Serial1 is up, line protocol is up,Hardware is HD64570,Description: 64Kb Line to San Jose,: : : : : : : : :,Operational.,Connection problem.,Interface problem.,Disabled .,Serial1 is up, line protocol is up,Serial1 is up, line protocol is down,Serial1 is down, line protocol is down,Serial1 is administratively down, line protocol is down,存活信息,载波监测,解读端口状态,串口上用,show controller,命令,Router#show controller serial 0,HD unit 0, idb = 0x121C04, driver structure at 0x127078,buffer size 1524 HD unit 0,V.35 DTE cable,.,.,.,显示串口线的线缆类型,课程内容,配接,CISCO,设备的线缆及接法,CISCO,IOS,及路由器的配置,CISCO,配置文件,CISCO CDP,协议简介,加载配置文件,控制台,IOS,Setup utility,show,startup-config,show,running-config,从,NVRAM,中加载并运行配置文件,如果,NVRAM,中没有配置文件, 进入,setup,模式,Config,Config,RAM,NVRAM,使用,show running,和,show startup,命令,wg_ro_c#,show startup-config,Using 1359 out of 32762 bytes,!,version 12.0,!,- More -,wg_ro_c,#,show running-config,Building configuration.Current configuration:!version 12.0,!,- More -,存在,NVRAM,中,存在,RAM,中,显示当前运行的和保存的配置情况,配置参数的来源,Config,Config,RAM,NVRAM,NVRAM,copy running startup,copy startup running (,合并),配置参数的来源,Config,Config,RAM,NVRAM,NVRAM,Terminal,copy running startup,copy startup running (,合并,),config term,(,合并,),Config,Config,Console,RAM,NVRAM,NVRAM,Terminal,TFTP,服务器,copy running startup,copy startup running (,合并,),TFTP,服务器,copy start tftp,copy tftp start,copy run tftp,copy tftp run,(,合并,),config term,(,合并,),配置参数的来源,配置参数的来源,Config,Config,Console,RAM,NVRAM,NVRAM,Terminal,TFTP server,删除启动配置文件,copy running startup,copy startup running (,合并,),TFTP,服务器,Blank,000000,000000,erasestart,config term,(,合并,),copy tftp run,(,合并,),copy tftp start,copy start tftp,copy run tftp,使用,copy run tftp,和,copy tftp run,命令,wg_ro_a#,copy running-config tftp,Address or name of remote host ? 10.1.1.1,Destination filename running-config? wgroa.cfg,.!,1684 bytes copied in 13.300 secs (129 bytes/sec),wg_ro_a#,copy tftp running-config,Address or name of remote host ? 10.1.1.1,Source filename ? wgroa.cfg,Destination filename running-config?,Accessing tftp:/10.1.1.1/wgroa.cfg.,Loading wgroa.cfg from 10.1.1.1 (via Ethernet0): !,OK - 1684/3072 bytes,1684 bytes copied in 17.692 secs (99 bytes/sec),wg_ro_a#,show flash,System flash directory:,File Length Name/status,1 10084696 c2500-js-l_120-3.bin,10084760 bytes used, 6692456 available, 16777216 total,16384K bytes of processor board System flash (Read ONLY),确认存贮空间并解析文件名,确认,Flash,中有足够空间来存放,IOS,映象文件,wg_ro_a#,copy flash tftp,Source filename ? c2500-js-l_120-3.bin,Address or name of remote host ? 10.1.1.1,Destination filename c2500-js-l_120-3.bin?,!,10084696 bytes copied in 709.228 secs (14223 bytes/sec),wg_ro_a#,作映象文件的备份,在升级,IOS,前备份当前的映象文件,网络,服务器,FLASH,copy flash tftp,wg_ro_a#,copy tftp flash,Address or name of remote host 10.1.1.1?,Source filename ? c2500-js-l_120-3.bin,Destination filename c2500-js-l_120-3.bin?,Accessing tftp:/10.1.1.1/c2500-js-l_120-3.bin.,Erase flash: before copying? confirm,Erasing the flash filesystem will remove all files! Continue? confirm,Erasing device. eeeee,(output omitted),.erased,Erase of flash: complete,Loading c2500-js-l_120-3.bin from 10.1.1.1 (via Ethernet0): !,(output omitted),OK - 10084696/20168704 bytes,Verifying checksum. OK (0x9AA0),10084696 bytes copied in 309.108 secs (32636 bytes/sec),wg_ro_a#,从网络升级,IOS,加载新的映象文件前对,Flash,作适当的文件删除,注意关于映象文件已经存在的提示信息,网络,服务器,FLASH,课程内容,配接,CISCO,设备的线缆及接法,CISCO,IOS,及路由器的配置,CISCO,配置文件,CISCO CDP,协议简介,CDP,协议,Cisco Discovery Protocol,是一个提供关于直接相连的交换机、路由器和其它,Cisco,设备的综合信息的专有工具,CDP,能够发现直接相邻的设备而不管这些设备所运行的是什么协议栈,物理介质必须能够支持,Subnetwork Access Protocol (SNAP),上层地址,Cisco,专有的链路层协议,介质必须能够支持,SNAP,TCP/IP,Novell IPX,CDP,能 发现并显示关于直接相连的,Cisco,设备的信息,ATM,Others,LANs,帧中继,AppleTalk,Others,CDP,运行在使用,10.3,或更新版,Cisco IOS,的路由器以及,Cisco,交换机和集线器上,能获取的信息包括,:,设备名,对应各协议的地址,端口名,角色特征,平台,CDP,show cdp,CDP,CDP,用,CDP,发现直接相邻的设备,使用,CDP,交换机,B,路由器,A,路由器,B,交换机,A,10.3.3.2,10.3.3.1,10.1.1.1,10.1.1.2,10.2.2.1,10.2.2.2,S0,S1,RouterA#sh cdp ?,entry Information for specific neighbor entry,interface CDP interface status and configuration,neighbors CDP neighbor entries,traffic CDP statistics,RouterA(config)#no cdp run,RouterA(config)#interface serial0,RouterA(config-if)#no cdp enable,交换机,A,同时也显示其,Mac,地址,使用,show cdp neighbor,命令,RouterA#sh cdp neighbors,Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge,S - Switch, H - Host, I - IGMP, r - Repeater,Device ID Local Intrfce Holdtme Capability Platform Port ID,RouterB Ser 0 148 R 2522 Ser 1,SwitchA0050BD855780 Eth 0 167 T S 1900 2,10.3.3.2,10.3.3.1,10.1.1.1,10.1.1.2,10.2.2.1,10.2.2.2,S0,S1,交换机,B,路由器,A,路由器,B,交换机,A,使用,show cdp entry,命令,RouterA#sh cdp entry *,-,Device ID: RouterB,Entry address(es):,IP address: 10.1.1.2,Platform: cisco 2522, Capabilities: Router,Interface: Serial0, Port ID (outgoing port): Serial1,Holdtime : 168 sec,Version :,Cisco Internetwork Operating System Software,IOS (tm) 2500 Software (C2500-JS-L), Version 12.0(3), RELEASE SOFTWARE (fci),Copyright (c) 1986-1999 by cisco Systems, Inc.,Compiled Mon 08-Feb-99 18:18 by phanguye,10.3.3.2,10.3.3.1,10.1.1.1,10.1.1.2,10.2.2.1,10.2.2.2,S0,S1,交换机,B,路由器,A,路由器,B,交换机,A,用,Telnet,连接到远端设备,远端设备,10.3.3.2,10.3.3.1,10.1.1.1,10.1.1.2,10.2.2.1,10.2.2.2,S0,S1,RouterA#telnet 10.2.2.2,Trying 10.2.2.2 . Open,-,Catalyst 1900 Management Console,Copyright (c) Cisco Systems, Inc. 1993-1998,All rights reserved.,Enterprise Edition Software,Ethernet Address: 00-90-86-73-33-40,PCA Number: 73-2239-06,PCA Serial Number: FAA02359H8K,Model Number: WS-C1924-EN,System Serial Number: FAA0237X0FQ,.,.,SwitchB,交换机,B,路由器,A,路由器,B,交换机,A,查看,Telnet,连接,10.3.3.2,10.3.3.1,10.1.1.1,10.1.1.2,10.2.2.1,10.2.2.2,S0,S1,RouterA#sh session,Conn Host Address Byte Idle Conn Name,1 10.1.1.2 10.1.1.2 0 1 10.1.1.2,* 2 10.3.3.2 10.3.3.2 0 0 10.3.3.2,RouterA#sh user,Line User Host(s) Idle Location,* 0 con 0 10.1.1.2 3,10.3.3.2 2,11 vty 0 idle 1 10.1.1.2,交换机,B,路由器,A,路由器,B,交换机,A,挂起一个,Telnet,会话,10.3.3.2,10.3.3.1,10.1.1.1,10.1.1.2,10.2.2.1,10.2.2.2,S0,S1,RouterB#x,RouterA#sh session,Conn Host Address Byte Idle Conn Name,1 10.1.1.2 10.1.1.2 0 1 10.1.1.2,RouterA#resume 1,RouterB#,交换机,B,路由器,A,路由器,B,交换机,A,RouterA#disconnect,Closing connection to 10.3.