思科配置帧中继详悉

Slide Title,Body Text,Second Level,Third Level,Fourth Level,Fifth Level,ICND v2.07-,30,构建,Frame Relay,连接,本章目标,通过本章的学习，您应该掌握以下内容,：,Frame Relay,的基本概念和操作,配置,Frame Relay,3,Frame Relay,概述,Frame Relay,的基本概念,使用虚拟电路（,VC）,实现连接,提供面向连接的服务,Frame Relay,协议栈,OSI Reference Model,Frame Relay,Physical,Presentation,Session,Transport,Network,Data-Link,Application,EIA/TIA-232, EIA/TIA-449, V.35, X.21, EIA/TIA-530,Frame Relay,IP/IPX/AppleTalk, etc.,Frame Relay,术语,Frame Relay,缺省操作: 非广播, 多路访问,(NBMA),选择,Frame Relay,拓扑,路由更新的发送问题,问题:,广播数据流必须在每条链路上传递,水平分割限制在一个接口接收的路由更新再次从这一接口转发出去,解决路由更新发送问题,子接口（,Subinterfaces,）,可以解决水平分割带来的问题,一个物理接口被模拟成多个逻辑的子接口.,Frame Relay,地址映射,通过,LMI,从,Frame Relay,交换机获取本地意义的电路状态信息,使用,Inverse ARP,来映射本地的电路号到远程路由器的网络层地址,Frame Relay,信号标准,Cisco,支持三种,LMI,标准,:,Cisco,ANSI T1.617 Annex D,ITU-T Q.933 Annex A,Frame Relay Inverse ARP,和,LMI,操作,Frame Relay Inverse ARP,和,LMI,操作,服务提供商如何映射,Frame Relay,电路号：从服务提供商的角度观察,服务提供商如何映射,Frame Relay,电路号：,从企业用户的角度观察,FRF.5,互连服务,Frame Relay,到,ATM,互连,FRF.5,互连服务,: 实现两个帧中继终端用户通过,ATM,互连,FRF.8,互连服务,Frame Relay,到,ATM,互连,FRF.8,互连服务,: 实现帧中继终端用户到,ATM,终端用户的互连,18,配置,Frame Relay,配置,Frame Relay,配置静态的,Frame Relay,映射,配置子接口,点到点子接口：,象专线一样操作，运行一条电路,每一个点到点子接口要求单独的,IP,子网,主要使用在,STAR,拓朴的帧中继网络,多点子接口：,象,NBMA,网络一样操作，运行多条电路，存在水平分割问题,使用一个,IP,子网，节省地址空间.,主要使用在,partial mesh,和,full mesh,拓朴的帧中继网络,配置点到点子接口,配置多点子接口,校验,Frame Relay,操作,Router#clear frame-relay-,inarp,显示使用,Inverse ARP,建立的动态,Frame Relay,映射,Router#show interfaces,type number,显示,Frame Relay,DLCIs,和,LMI,信息,Router#show frame-relay,lmi,type number,显示,LMI,状态,Router#show frame-relay map,显示当前的,Frame Relay,映射进程,Router#show frame-relay,pvc,type number,dlci,显示,PVC,状态,Router#show frame-relay traffic,显示,Frame Relay,数据流状态,show interfaces,举例,显示,line, protocol, DLCI, and LMI,信息,Router#show interfaces s0,Serial0 is up, line protocol is up,Hardware is HD64570,Internet address is 10.140.1.2/24,MTU 1500 bytes, BW 1544,Kbit, DLY 20000,usec, rely 255/255, load 1/255,Encapsulation FRAME-RELAY,loopback,not set,keepalive,set (10 sec),LMI,enq,sent 19, LMI stat,recvd,20, LMI,upd recvd,0, DTE LMI up,LMI,enq recvd,0, LMI stat sent 0, LMI,upd,sent 0,LMI DLCI 1023 LMI type is CISCO frame relay DTE,FR SVC disabled, LAPF state down,Broadcast queue 0/64, broadcasts sent/dropped 8/0, interface broadcasts 5,Last input 00:00:02, output 00:00:02, 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,显示,LMI,信息,Router#show frame-relay,lmi,LMI Statistics for interface Serial0 (Frame Relay DTE) LMI TYPE = CISCO,Invalid Unnumbered info 0 Invalid Prot Disc 0,Invalid dummy Call Ref 0 Invalid,Msg,Type 0,Invalid Status Message 0 Invalid Lock Shift 0,Invalid Information ID 0 Invalid Report IE Len 0,Invalid Report Request 0 Invalid Keep IE Len 0,Num Status,Enq,. Sent 113100 Num Status,msgs,Rcvd 113100,Num Update Status Rcvd 0 Num Status Timeouts 0,show frame-relay,lmi,举例,显示,PVC,数据流状态,show frame-relay,pvc,举例,Router#show frame-relay,pvc,100,PVC Statistics for interface Serial0 (Frame Relay DTE),DLCI = 100, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0,input,pkts,28 output,pkts,10 in bytes 8398,out bytes 1198 dropped,pkts,0 in FECN,pkts,0,in BECN,pkts,0 out FECN,pkts,0 out BECN,pkts,0,in DE,pkts,0 out DE,pkts,0,out,bcast pkts,10 out,bcast,bytes 1198,pvc,create time 00:03:46, last time,pvc,status changed 00:03:47,显示当前的,Frame Relay,映射进程，包括动态和静态映射,Router#show frame-relay map,Serial0 (up):,ip,10.140.1.1,dlci,100(0x64,0x1840), dynamic,broadcast, status defined, active,show frame-relay map,举例,清空动态建立的,Frame Relay,映射,清理,frame-relay-,inarp,举例,Router#show frame-relay map,Serial0 (up):,ip,10.140.1.1,dlci,100(0x64,0x1840), dynamic,broadcast, status defined, active,Router#clear frame-relay-,inarp,Router#show frame map,Router#,基本的排错操作,显示,LMI debug,信息,Router#debug frame-relay,lmi,Frame Relay LMI debugging is on,Displaying all Frame Relay LMI data,Router#,1w2d: Serial0(out):,StEnq,myseq,140,yourseen,139, DTE up,1w2d:,datagramstart,= 0xE008EC,datagramsize,= 13,1w2d: FR,encap,= 0xFCF10309,1w2d: 00 75 01 01 01 03 02 8C 8B,1w2d:,1w2d: Serial0(in): Status,myseq,140,1w2d: RT IE 1, length 1, type 1,1w2d: KA IE 3, length 2,yourseq,140,myseq,140,1w2d: Serial0(out):,StEnq,myseq,141,yourseen,140, DTE up,1w2d:,datagramstart,= 0xE008EC,datagramsize,= 13,1w2d: FR,encap,= 0xFCF10309,1w2d: 00 75 01 01 01 03 02 8D 8C,1w2d:,1w2d: Serial0(in): Status,myseq,142,1w2d: RT IE 1, length 1, type 0,1w2d: KA IE 3, length 2,yourseq,142,myseq,142,1w2d: PVC IE 0x7 , length 0x6 ,dlci,100, status 0x2 ,bw,0,