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1、实验十广域网协议的封装【实验名称】广域网协议的封装【实验目的】掌握广域网协议的封装类型和封装方法【背景描述】你是公司的网络管理员，两个分公司之间希望能够申请一条广域网专线进行连接。公司现有锐捷路由器两台，希望你了解该设备的广域网接口所支持的协议，以确定选择哪一种广域网链路。【技术原理】常见广域网专线技术有，DDN专线、PSTN/ISDN专线、帧中继专线、X.25专线等。数据链路层提供各种专线技术的协议，主要有PPP、HDLC、X.25、Frame-relay以及ATM等。【实现功能】查看路由器广域网接口支持的数据链路层协议，并进行正确的封装。【实验设备】R1762路由器（1台）【实验拓扑】00
2、14.JPG (6.31 KB)2008-11-5 17:28图 22【实验步骤】步骤6. 查看广域网接口默认的封装类型。Router1# show interface serial 1/2serial 1/2 is UP, line protocol is UP!查看接口的状态，是否为UPHardware is PQ2 SCC HDLC CONTROLLER serialInterface address is: 1.1.1.2/24 !查看接口IP地址的配置MTU 1500 bytes, BW 512 Kbit !查看接口的带宽为512KEncapsulation protocol is
3、HDLC, loopback not set!默认的封装协议是HDLCKeepalive interval is 10 sec , setCarrier delay is 2 secRXload is 1 ,Txload is 1Queueing strategy: WFQ5 minutes input rate 17 bits/sec, 0 packets/sec5 minutes output rate 17 bits/sec, 0 packets/sec 511 packets input, 11242 bytes, 0 no buffer Received 511 broadcasts
4、, 0 runts, 0 giants 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 abort 511 packets output, 11242 bytes, 0 underruns 0 output errors, 0 collisions, 1 interface resets 1 carrier transitions V35 DTE cable !该接口为DTE端DCD=upDSR=upDTR=upRTS=upCTS=up步骤7. 查看广域网接口支持的封装类型。RouterA(config)#interface serial 1/2Rou
5、terA(config-if)#encapsulation ?!encapsulation是封装数据链路层协议的命令frame-relay Frame Relay networks !帧中继协议hdlc serial HDLC synchronous !高级数据链路控制协议lapb LAPB(X.25 Level 2) !X.25的二层协议ppp Point-to-Point protocol !PPP点到点协议x25 X.25 !X.25协议步骤8. 更改广域网接口的封装类型。 PPP封装RRouterA(config)#interface serial 1/2 !进行serial 1/2R
6、outerA(config-if)#encapsulation ppp !将接口协议封装为PPPRouterA(config-if)#endRouterA#show interfaceserial 1/2 !查看接口的封装协议serial 1/2 is UP, line protocol is DOWNHardware is PQ2 SCC HDLC CONTROLLER serialInterface address is: 192.168.1.1/24MTU 1500 bytes, BW 2000 KbitEncapsulation protocol is PPP, loopback no
7、t setKeepalive interval is 10 sec , setCarrier delay is 2 secRXload is 1 ,Txload is 1LCP Reqsent !PPP协议相关参数Closed: ipcpQueueing strategy: FIFO Output queue 0/40, 0 drops; Input queue 0/75, 0 drops5 minutes input rate 14 bits/sec, 0 packets/sec5 minutes output rate 36 bits/sec, 0 packets/sec 403 pack
8、ets input, 8866 bytes, 0 no buffer Received 246 broadcasts, 0 runts, 0 giants 15 input errors, 0 CRC, 15 frame, 0 overrun, 0 abort 1011 packets output, 29156 bytes, 0 underruns 0 output errors, 0 collisions, 59 interface resets 1 carrier transitions V35 DCE cable DCD=upDSR=upDTR=upRTS=upCTS=up R Fra
9、me-Relay封装RouterA(config)#interface serial 1/2 !进行serial 1/2RouterA(config-if)#encapsulation frame-relay !将接口协议封装为帧中继RouterA(config-if)#endRouterA#show interfaceserial 1/2 !查看接口的封装协议 serial 1/2 is UP, line protocol is UPHardware is PQ2 SCC HDLC CONTROLLER serialInterface address is: 192.168.1.1/24MT
10、U 1500 bytes, BW 2000 KbitEncapsulation protocol is FRAME RELAY, loopback not set!封装协议Keepalive interval is 10 sec , setCarrier delay is 2 secRXload is 1 ,Txload is 1LMI enq sent1, LMI status recvd 0, LMI update recvd 0, DTE LMI upLMI enq recvd 0, LMI status sent0, LMI update sent0LMI DLCI 0LMI type
11、 is CCITT, frame relay DTEinterface broadcasts 0 !帧中继协议相关参数Queueing strategy: FIFO Output queue 0/40, 0 drops; Input queue 0/75, 0 drops5 minutes input rate 15 bits/sec, 0 packets/sec5 minutes output rate 36 bits/sec, 0 packets/sec 405 packets input, 8910 bytes, 0 no buffer Received 246 broadcasts,
12、0 runts, 0 giants 15 input errors, 0 CRC, 15 frame, 0 overrun, 0 abort 1017 packets output, 29239 bytes, 0 underruns 0 output errors, 0 collisions, 61 interface resets 1 carrier transitions V35 DCE cableDCD=upDSR=upDTR=upRTS=upCTS=up R X.25封装RouterA(config)#interface serial 1/2 !进行serial 1/2RouterA(
13、config-if)#encapsulation X25 !将接口协议封装为X.25RouterA(config-if)#endRouterA#show interfaceserial 1/2 !查看接口的封装协议serial 1/2 is UP, line protocol is DOWNHardware is PQ2 SCC HDLC CONTROLLER serialInterface address is: 192.168.1.1/24MTU 1500 bytes, BW 2000 KbitEncapsulation protocol is X.25, loopback not set !查看封装协议Keepalive interval is 0 sec , no setCarrier delay is 2 secRXload is 1 ,Txload is 1LAPB DTE, modulo 8, k 7, N1 12056, N2 20 T1 3000, interface outage (partial T3) 0, T4 0 State SABMSENT, VS 0, VR 0, Remote VR 0, Retransmissions 2 Queues: U/S frames 0, I frames 0, unack. 0, reTx 0
