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帧中继Frame Relay.docx

1、帧中继Frame RelayPacket Tracer 5.0实验帧中继Frame Relay帧中继是一种用于连接计算机系统的面向分组的通信方法。它主要用在公共或专用网上的局域网互联以及广域网连接。大多数公共电信局都提供帧中继服务,把它作为建立高性能的虚拟广域连接的一种途径。帧中继是进入带宽范围从56Kbps到1544Mbps的广域分组交换网的用户接口。帧中继是从综合业务数字网中发展起来的,并在1984年推荐为国际电话电报咨询委员会(CCITT)的一项标准,另外,由美国国家标准协会授权的美国TIS标准委员会也对帧中继做了一些初步工作。数据链路连接标识符(DLCI) 这个信息包含标识号,它标识多

2、路复用到通道的逻辑连结。帧中继交换机将两端的DLCI关联起来,它是帧中继帧格式中地字段的一个重要部分之一,这是个6位标识,表示正在进行的客户和服务器之间的连接,用于RFCOMM 层。 帧中继使用DLCI来标识DTE和服务商交换机之间的虚电路。DLCI字段的长度一般为10bit,但也可扩展为16bit,前者用二字节地址字段,后者是三字节地址字段。23bit用四字节地址字段。DLCI值用于标识永久虚电路(PVC),呼叫控制或管理信息。DLCI只具有本地意义。一、使用Packet Tracer 5.0构建帧中继仿真添加三个2811路由器和一个云图一图二给2811添加一个具有串口的模块图三图四把路由器

3、2811的串口与云的串口相连,路由器的串口为DTE图五实验拓扑图及IP地址、DLCI分配二、配置Frame Relay以Router2为例,其它两个路由器相似,后是人为添加的注释,在实际配置时不存在Routeren进入特权配置模式Router#conf t进入全局配置模式Enter configuration commands, one per line. End with CNTL/Z.Router(config)#no ip domain-lookup取消名称解析Router(config)#hostname Router2配置路由器的名字Router2(config)#int fa0/1

4、进入接口配置模式Router2(config-if)#ip address 172.18.1.1 255.255.255.0配置ip地址Router2(config-if)#no shut激活端口%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to upRouter2(config-if)#int serial0/3/0Router2(config-if)#en

5、capsulation frame-relay对串口serial0/3/0进行frame-relay封装Router2(config-if)#no shut%LINK-5-CHANGED: Interface Serial0/3/0, changed state to upRouter2(config-if)#%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/3/0, changed state to upRouter2(config-if)#interface serial0/3/0.1 point-to-point进入串口的子接

6、口配置模式%LINK-5-CHANGED: Interface Serial0/3/0.1, changed state to up%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/3/0.1, changed state to upRouter2(config-subif)#ip address 192.168.1.1 255.255.255.0 为子接口配置IP地址Router2(config-subif)#description Link Router1 DLCI 30为子接口添加描述Router2(config-subif)

7、#frame-relay interface-dlci 40配置DLCIRouter2(config-subif)#interface serial0/3/0.2 point-to-point%LINK-5-CHANGED: Interface Serial0/3/0.2, changed state to up%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/3/0.2, changed state to upRouter2(config-subif)#ip address 192.168.3.1 255.255.255.0Rou

8、ter2(config-subif)#description link to Router0 DLCI20Router2(config-subif)#frame-relay interface-dlci 41Router2(config-subif)#end%SYS-5-CONFIG_I: Configured from console by consoleRouter2#conf tEnter configuration commands, one per line. End with CNTL/Z.Router2(config)#router eigrp 100在路由器上启用EIGRP路由

9、协议Router2(config-router)#network 172.18.0.0通告与自己直接想连的网段Router2(config-router)#network 192.168.3.0Router2(config-router)#network 192.168.1.0Router2(config-router)#%SYS-5-CONFIG_I: Configured from console by consoleRouter2#copy running-config startup-config保存配置Destination filename startup-config? Buil

10、ding configuration.OKRouter2#路由器Router0的配置:Router0#sh running-configBuilding configuration.Current configuration : 830 bytes!version 12.4no service password-encryption!hostname Router0!ip ssh version 1no ip domain-lookup!interface FastEthernet0/0no ip addressduplex autospeed autoshutdown!interface F

11、astEthernet0/1ip address 172.16.1.1 255.255.255.0duplex autospeed auto!interface Serial0/3/0no ip addressencapsulation frame-relay!interface Serial0/3/0.1 point-to-pointdescription Link to Router 2ip address 192.168.3.2 255.255.255.0frame-relay interface-dlci 20!interface Serial0/3/0.2 point-to-poin

12、tdescription Link to Router1ip address 192.168.2.2 255.255.255.0frame-relay interface-dlci 21!interface Vlan1no ip addressshutdown!router eigrp 100network 172.16.0.0network 192.168.3.0network 192.168.2.0auto-summary!ip classless!line con 0line vty 0 4login!end路由器Router1的配置Router1#sh running-configBu

13、ilding configuration.Current configuration : 843 bytes!version 12.4no service password-encryption!hostname Router1!ip ssh version 1no ip domain-lookup!interface FastEthernet0/0no ip addressduplex autospeed autoshutdown!interface FastEthernet0/1ip address 172.17.1.1 255.255.255.0duplex autospeed auto

14、!interface Serial0/3/0no ip addressencapsulation frame-relay!interface Serial0/3/0.1 point-to-pointdescription link to Router2 DLCI40ip address 192.168.1.2 255.255.255.0frame-relay interface-dlci 30!interface Serial0/3/0.2 point-to-pointdescription link to router0 DLCI21ip address 192.168.2.1 255.25

15、5.255.0frame-relay interface-dlci 31!interface Vlan1no ip addressshutdown!router eigrp 100network 192.168.1.0network 192.168.2.0network 172.17.0.0auto-summary!ip classless!line con 0line vty 0 4login!end路由器Router2的配置Router2#sh running-configBuilding configuration.Current configuration : 841 bytes!ve

16、rsion 12.4no service password-encryption!hostname Router2!ip ssh version 1no ip domain-lookup!interface FastEthernet0/0no ip addressduplex autospeed autoshutdown!interface FastEthernet0/1ip address 172.18.1.1 255.255.255.0duplex autospeed auto!interface Serial0/3/0no ip addressencapsulation frame-re

17、lay!interface Serial0/3/0.1 point-to-pointdescription Link Router1 DLCI 30ip address 192.168.1.1 255.255.255.0frame-relay interface-dlci 40!interface Serial0/3/0.2 point-to-pointdescription link to Router0 DLCI20ip address 192.168.3.1 255.255.255.0frame-relay interface-dlci 41!interface Vlan1no ip a

18、ddressshutdown!router eigrp 100network 172.18.0.0network 192.168.3.0network 192.168.1.0auto-summary!ip classless!line con 0line vty 0 4login!end路由器配置完毕后,还需要配置Cloud0。图六根据路由器的相关配置,给Cloud0的serial0配置DLCI及LMI类型图七根据路由器的相关配置,给Cloud0的serial1配置DLCI及LMI类型图八根据路由器的相关配置,给Cloud0的serial2配置DLCI及LMI类型图九根据路由器的相关配置,配置

19、Cloud0的Frame Relay三、配置各个计算机,并使用ping命令校验网络的连通性pc0PCipconfigIP Address.: 172.16.1.2Subnet Mask.: 255.255.255.0Default Gateway.: 172.16.1.1PCping 192.168.1.1Pinging 192.168.1.1 with 32 bytes of data:Reply from 192.168.1.1: bytes=32 time=141ms TTL=254Reply from 192.168.1.1: bytes=32 time=110ms TTL=254Re

20、ply from 192.168.1.1: bytes=32 time=143ms TTL=254Reply from 192.168.1.1: bytes=32 time=110ms TTL=254Ping statistics for 192.168.1.1: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),Approximate round trip times in milli-seconds: Minimum = 110ms, Maximum = 143ms, Average = 126msPCping 192.168.2.2P

21、inging 192.168.2.2 with 32 bytes of data:Reply from 192.168.2.2: bytes=32 time=62ms TTL=255Reply from 192.168.2.2: bytes=32 time=62ms TTL=255Reply from 192.168.2.2: bytes=32 time=47ms TTL=255Reply from 192.168.2.2: bytes=32 time=63ms TTL=255Ping statistics for 192.168.2.2: Packets: Sent = 4, Receive

22、d = 4, Lost = 0 (0% loss),Approximate round trip times in milli-seconds: Minimum = 47ms, Maximum = 63ms, Average = 58msPCping 192.168.3.1Pinging 192.168.3.1 with 32 bytes of data:Reply from 192.168.3.1: bytes=32 time=109ms TTL=254Reply from 192.168.3.1: bytes=32 time=125ms TTL=254Reply from 192.168.

23、3.1: bytes=32 time=93ms TTL=254Reply from 192.168.3.1: bytes=32 time=94ms TTL=254Ping statistics for 192.168.3.1: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),Approximate round trip times in milli-seconds: Minimum = 93ms, Maximum = 125ms, Average = 105msPCping 172.17.1.1Pinging 172.17.1.1 wit

24、h 32 bytes of data:Reply from 172.17.1.1: bytes=32 time=110ms TTL=254Reply from 172.17.1.1: bytes=32 time=112ms TTL=254Reply from 172.17.1.1: bytes=32 time=123ms TTL=254Reply from 172.17.1.1: bytes=32 time=110ms TTL=254Ping statistics for 172.17.1.1: Packets: Sent = 4, Received = 4, Lost = 0 (0% los

25、s),Approximate round trip times in milli-seconds: Minimum = 110ms, Maximum = 123ms, Average = 113msPCping 172.18.1.1Pinging 172.18.1.1 with 32 bytes of data:Reply from 172.18.1.1: bytes=32 time=140ms TTL=254Reply from 172.18.1.1: bytes=32 time=109ms TTL=254Reply from 172.18.1.1: bytes=32 time=110ms TTL=254Reply from 172.18.1.1: bytes=32 time=125ms TTL=254Ping statistics for 172.18.1.1: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),Approximate round trip times in milli-seconds: Minimum = 109ms, Maximum = 140ms, Average = 121ms

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