广域网协议的封装

1、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

2、验拓扑】【实验步骤】 步骤一查看广域网接口默认的封装类型：Routerl# show in terface 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 serial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 HDLC, loopback not set/ 默认的圭寸装协议是HDLCKeepalive in terval is

3、 10 sec , setCarrier delay is 2 secRXload is 1 ,Txload is 1Queue ing strategy: WFQ5 minu tes in put rate 17 bits/sec, 0 packets/sec5 minu tes output rate 17 bits/sec, 0 packets/sec511 packets in put, 11242 bytes, 0 no bufferReceived 511 broadcasts, 0 run ts, 0 gia nts0 in put errors, 0 CRC, 0 frame,

4、 0 overr un, 0 abort511 packets output, 11242 bytes, 0 underruns0 output errors, 0 collisi on s, 1 in terface resets1 carrier tran siti onsV35 DTE cable/ 该接口为 DTE 端DCD=up DSR=up DTR=up RTS=up CTS=up步骤二查看广域网接口支持的封装类型:RouterA(c on fig)#i nterface serial 1/2RouterA(c on fig-if)#e ncapsulati on ?en caps

5、ulation是圭寸装数据链路层协议的命令frame-relayFrame Relay n etworks/帧中继协议hdlcserial HDLC synchronous/高级数据链路控制协议lapbLAPB(X.25 Level 2)/X.25的二层协议pppPoin t-to-Po int protocol/PPP点到点协议x25X.25/X.25 协议步骤三更改广域网接口的封装类型：PPP封装/ 进行 serial 1/2/将接口协议封装为 PPPRouterA(c on fig)#i nterface serial 1/2RouterA(config-if)#encapsulatio

6、n pppRouterA(c on fig-if)#e ndRouterA#show in terface serial 1/2/ 查看接口的圭寸装协议serial 1/2 is UP , line protocol is DOWNHardware is PQ2 SCC HDLC CONTROLLER serialMTU 1500 bytes, BW 2000 KbitEn capsulati on protocol is PPP, loopback not setKeepalive in terval is 10 sec , setCarrier delay is 2 secRXload i

7、s 1 ,Txload is 1LCP Reqse nt/PPP 协议相关参数Closed: ipcpQueueing strategy: FIFOOutput queue 0/40, 0 drops;In put queue 0/75, 0 drops5 minu tes in put rate 14 bits/sec, 0 packets/sec5 minu tes output rate 36 bits/sec, 0 packets/sec403 packets in put, 8866 bytes, 0 no bufferReceived 246 broadcasts, 0 run t

8、s, 0 gia nts15 in put errors, 0 CRC, 15 frame, 0 overru n, 0 abort1011 packets output, 29156 bytes, 0 un derru ns0 output errors, 0 collisi ons, 59 in terface resets1 carrier tran siti onsV35 DCE cableDCD=up DSR=up DTR=up RTS=up CTS=upFrame-Relay 圭寸装RouterA(config)#interface serial 1/2/ 进行 serial 1/

9、2RouterA(config-if)#encapsulation frame-relay/ 将接口协议圭寸装为帧中继RouterA(c on fig-if)#e ndRouterA#show in terface serial 1/2/ 查看接口的圭寸装协议serial 1/2 is UP , line protocol is UPHardware is PQ2 SCC HDLC CONTROLLER serialMTU 1500 bytes, BW 2000 KbitEncapsulation protocol is FRAME RELAY, loopback not set/ 圭寸装协议

10、Keepalive in terval is 10 sec , setCarrier delay is 2 secRXload is 1 ,Txload is 1LMI enq sent 1, LMI status recvd 0, LMI update recvd 0, DTE LMI upLMI enq recvd 0, LMI status sent 0, LMI update sent 0LMI DLCI 0 LMI type is CCITT, frame relay DTE in terface broadcasts 0/帧中继协议相关参数Queueing strategy: FI

11、FOOutput queue 0/40, 0 drops;In put queue 0/75, 0 drops5 minu tes in put rate 15 bits/sec, 0 packets/sec5 minu tes output rate 36 bits/sec, 0 packets/sec405 packets in put, 8910 bytes, 0 no bufferReceived 246 broadcasts, 0 run ts, 0 gia nts15 in put errors, 0 CRC, 15 frame, 0 overru n, 0 abort1017 p

12、ackets output, 29239 bytes, 0 un derru ns0 output errors, 0 collisi ons, 61 in terface resets1 carrier tran siti onsV35 DCE cableDCD=up DSR=up DTR=up RTS=up CTS=upX.25封装RouterA(c on fig)#i nterface serial 1/2/ 进行 serial 1/2RouterA(c on fig-if)#e ncapsulatio n X25/将接口协议封装为X.25RouterA(c on fig-if)#e n

13、dRouterA#show in terface serial 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 serialMTU 1500 bytes, BW 2000 Kbit/查看封装协议En capsulati on protocol is X.25, loopback not setKeepalive in terval is 0 sec , no setCarrier delay is 2 secRXIoad is 1 ,Txload is 1LAPB

14、DTE, modulo 8, k 7, N1 12056, N2 20T1 3000, interface outage (partial T3) 0, T4 0State SABMSENT, VS 0, VR 0, Remote VR 0, Retra nsmissio ns 2Queues: U/S frames 0, I frames 0, un ack. 0, reTx 0IFRAMEs 0/0 RNRs 0/0 REJs 0/0 SABM/Es 2/0 FRMRs 0/0 DISCs 0/0X25 DTE, address , state R1, modulo 8Defaults:

15、DEF en capsulati on, idle 0, nvc 3in put/output window sizes 2/2, packet sizes 128/128Timers: T20 180, T21 200, T22 180, T23 180, TH 0Chann els: Incoming-only none, Two-way 1-1024,Outgo ing-onlynoneRESTARTs 0/0 CALLs 0+0/0+0/0+0 DIAGs 0/0/X.25 协议相关参数Queueing strategy: FIFOOutput queue 0/40, 0 drops;In put queue 0/75, 0 drops5 minu tes in put rate 16 bits/sec, 0 packets/sec5 minu tes output rate 32 bits/sec, 0 packets/sec407 packets in put, 8954 bytes, 0 no bufferReceived 246 broadcasts, 0 run ts, 0 gia nts15 in put errors, 0