十二章应用帧中继实现广域网的连接ppt课件

1、 1999, Cisco Systems, Inc. 14-1第十二章第十二章运用帧中继实现运用帧中继实现广域网衔接广域网衔接 1999, Cisco Systems, Inc. ICND14-2经过本章的学习，您应该掌握以下内容：经过本章的学习，您应该掌握以下内容：了解了解 Frame Relay 任务过程任务过程配置配置 Frame Relay配置配置 Frame Relay 的子端口的子端口查看查看 Frame Relay 信息信息本章目的本章目的 1999, Cisco Systems, Inc. ICND14-3Frame Relay 概述概述 运用虚电路进展衔接 提供面向对象的效力

2、Frame Relay works here.DCE or FrameRelay SwitchCSU/DSU 1999, Cisco Systems, Inc. ICND14-4Frame Relay 栈栈OSI 参考模型参考模型Frame RelayPhysicalPresentationSessionTransportNetworkData LinkApplicationEIA/TIA-232, EIA/TIA-449, V.35, X.21, EIA/TIA-530Frame RelayIP/IPX/AppleTalk, etc. 1999, Cisco Systems, Inc. IC

3、ND14-5Frame Relay 术语术语LocalAccessLoop=T1Local AccessLoop=64 kbpsLocal AccessLoop=64 kbpsDLCI: 400PVCDLCI: 500LMI100=Active400=ActiveDLCI: 200DLCI: 100PVC 1999, Cisco Systems, Inc. ICND14-6CSU/DSUFrame Relay 地址映射地址映射 从提供商那里得到本地的DLCI号 建立目的地址和本地DLCI之间的映射关系DLCI: 500PVC10.1.1.1Inverse ARP orFrame Relay m

4、apIP(10.1.1.1)FrameRelayDLCI (500) 1999, Cisco Systems, Inc. ICND14-7Frame Relay 信号信号Cisco 路由器支持三种 LMI 规范:CiscoANSI T1.617 Annex DITU-T Q.933 Annex ADLCI: 400PVCKeepaliveCSU/DSUDLCI: 500PVC10.1.1.1xLMI500=Active400=Inactive 1999, Cisco Systems, Inc. ICND14-8Frame Relay 的反转的反转 ARP 协议协议和和 LMI 任务任务Fram

5、e RelayCloud1DLCI=100DLCI=400172.168.5.5172.168.5.7 1999, Cisco Systems, Inc. ICND14-9Frame Relay 的反转的反转 ARP 协议协议和和 LMI 任务任务2Status Inquiry2Status InquiryFrame RelayCloud1DLCI=100DLCI=400172.168.5.5172.168.5.7 1999, Cisco Systems, Inc. ICND14-10Frame Relay 的反转的反转 ARP 协议协议和和 LMI 任务任务3Local DLCI 100=A

6、ctive4Local DLCI 400=Active2Status Inquiry2Status InquiryFrame RelayCloud1DLCI=100DLCI=4003172.168.5.5172.168.5.7 1999, Cisco Systems, Inc. ICND14-11Frame Relay 的反转的反转 ARP 协议协议和和 LMI 任务任务4Hello, I am 172.168.5.5.3Local DLCI 100=Active4Local DLCI 400=Active2Status Inquiry2Status InquiryFrame RelayClo

7、ud1DLCI=100DLCI=4003172.168.5.5172.168.5.7 1999, Cisco Systems, Inc. ICND14-12Frame Relay 的反转的反转 ARP 协议协议和和 LMI 任务任务Hello, I am 172.168.5.7.45Frame Relay Map172.168.5.5 DLCI 400 ActiveFrame RelayCloudDLCI=100DLCI=400Frame Relay Map172.168.5.7 DLCI 100 Active5172.168.5.5172.168.5.7 1999, Cisco System

8、s, Inc. ICND14-13Frame Relay 的反转的反转 ARP 协议协议和和 LMI 任务任务Hello, I am 172.168.5.7.45Frame Relay Map172.168.5.5 DLCI 400 ActiveFrame RelayCloudDLCI=100DLCI=400Frame Relay Map172.168.5.7 DLCI 100 Active5Hello, I am 172.168.5.5.6172.168.5.5172.168.5.7 1999, Cisco Systems, Inc. ICND14-14Frame Relay 的反转的反转

9、ARP 协议协议和和 LMI 任务任务KeepalivesKeepalivesHello, I am 172.168.5.7.45Frame Relay Map172.168.5.5 DLCI 400 ActiveFrame RelayCloudDLCI=100DLCI=400Frame Relay Map172.168.5.7 DLCI 100 Active5Hello, I am 172.168.5.5.677172.168.5.5172.168.5.7 1999, Cisco Systems, Inc. ICND14-15 Rel. 11.2 RouterRel. 10.3 Router

10、interface Serial1 ip address 10.16.0.1 255.255.255.0 encapsulation frame-relay bandwidth 64interface Serial1 ip address 10.16.0.2 255.255.255.0 encapsulation frame-relay bandwidth 64 frame-relay lmi-type ansiHQBranch配置配置 Frame Relay 1999, Cisco Systems, Inc. ICND14-16反转反转 ARP缺省情况下是激活的缺省情况下是激活的在配置输出信

11、息中看不出来在配置输出信息中看不出来Rel. 11.2 RouterRel. 10.3 RouterHQ interface Serial1 ip address 10.16.0.1 255.255.255.0 encapsulation frame-relay bandwidth 64interface Serial1 ip address 10.16.0.2 255.255.255.0 encapsulation frame-relay bandwidth 64 frame-relay lmi-type ansiBranch配置配置 Frame Relay 1999, Cisco Syst

12、ems, Inc. ICND14-17DLCI=110IP address=10.16.0.1/24 p1r1DLCI=100IP address=10.16.0.2/24 interface Serial1ip address 10.16.0.1 255.255.255.0encapsulation frame-relaybandwidth 64frame-relay map ip 10.16.0.2 110 broadcastHQBranch配置静态的配置静态的 Frame Relay 映射映射 1999, Cisco Systems, Inc. ICND14-18查看查看 Frame R

13、elay 信息信息显示协议、DLCI、和 LMI 的相关信息Router#show interface s0Serial0 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, L

14、MI 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

15、never Last clearing of show interface counters never Queueing strategy: fifo Output queue 0/40, 0 drops; input queue 0/75, 0 drops 1999, Cisco Systems, Inc. ICND14-19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

16、 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 T

17、imeouts 0 1999, Cisco Systems, Inc. ICND14-20显示 PVC 数据通讯信息Router#show frame-relay pvc 100PVC 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 pkt

18、s 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 1999, Cisco Systems, Inc. ICND14-21显示路由信息Router#show frame-relay mapSerial0 (up): ip 10.140.1.1 dlci 100(0 x64,0 x1840)

19、, dynamic, broadcast, status defined, active 1999, Cisco Systems, Inc. ICND14-22去除动态的去除动态的Frame Relay 映射关系映射关系查看查看 Frame Relay 信息信息Router#show frame-relay mapSerial0 (up): ip 10.140.1.1 dlci 100(0 x64,0 x1840), dynamic, broadcast, status defined, activeRouter#clear frame-relay-inarpRouter#sh frame m

20、apRouter# 1999, Cisco Systems, Inc. ICND14-23显示显示 LMI 的调试信息的调试信息查看查看 Frame Relay 信息信息Router#debug Frame lmiFrame Relay LMI debugging is onDisplaying all Frame Relay LMI dataRouter#1w2d: Serial0(out): StEnq, myseq 140, yourseen , DTE up1w2d: datagramstart = 0 xE008EC, datagramsize = 131w2d: FR encap

21、= 0 xFCF103091w2d: 00 75 01 01 01 03 02 8C 8B1w2d:1w2d: Serial0(in): Status, myseq 1401w2d: RT IE 1, length 1, type 11w2d: KA IE 3, length 2, yourseq 140, myseq 1401w2d: Serial0(out): StEnq, myseq 141, yourseen 140, DTE up1w2d: datagramstart = 0 xE008EC, datagramsize = 131w2d: FR encap = 0 xFCF10309

22、1w2d: 00 75 01 01 01 03 02 8D 8C1w2d:1w2d: Serial0(in): Status, myseq 1421w2d: RT IE 1, length 1, type 01w2d: KA IE 3, length 2, yourseq 142, myseq 1421w2d: PVC IE 0 x7 , length 0 x6 , dlci 100, status 0 x2 , bw 0 1999, Cisco Systems, Inc. ICND14-24Star (Hub and Spoke)Full MeshPartial MeshFrame Rela

23、y default: nonbroadcast, multiaccess (NBMA)选择选择 Frame Relay 拓扑构造拓扑构造 1999, Cisco Systems, Inc. ICND14-25问题:广播帧必需复制给其它曾经建立的衔接RoutingUpdateACB231路由信息的可达性路由信息的可达性BCDA 1999, Cisco Systems, Inc. ICND14-26实现路由信息的可达性实现路由信息的可达性处理方法:在NBMA环境的网络中运用程度分割能够呵斥一些问题划分子端口可以处理程度分割呵斥的问题一个物理端口可以被划分成多个逻辑意义上的子端口Subnet ASu

24、bnet BSubnet CS0PhysicalInterfaceS0.1S0.2S0.3Logical Interface 1999, Cisco Systems, Inc. ICND14-27子端口的配置子端口的配置 点到点点到点 子端口看作是专线子端口看作是专线 没一个点到点衔接的子端口要求由本人的子网没一个点到点衔接的子端口要求由本人的子网 适用于星型拓扑构造适用于星型拓扑构造 多点多点 子端口运用在子端口运用在 NBMA 网络，因此它们无法处理网络，因此它们无法处理程度分割所带来的问题程度分割所带来的问题 由于运用的是单独的子网可以保管地址空间由于运用的是单独的子网可以保管地址空间

25、适用于适用于 partial-mesh 和和 full-mesh 拓扑构造中拓扑构造中 1999, Cisco Systems, Inc. ICND14-28A10.17.0.1s0.2B配置点到点的子端口配置点到点的子端口interface Serial0 no ip address encapsulation frame-relay!interface Serial0.2 point-to-point ip address 10.17.0.1 255.255.255.0 bandwidth 64 frame-relay interface-dlci 110!interface Serial

26、0.3 point-to-point ip address 10.18.0.1 255.255.255.0 bandwidth 64 frame-relay interface-dlci 120!s0.310.18.0.1C10.17.0.210.18.0.2DLCI=110DLCI=120 1999, Cisco Systems, Inc. ICND14-29 interface Serial2 no ip address encapsulation frame-relay!interface Serial2.2 multipoint ip address 10.17.0.1 255.255.255.0 bandwidth 64 frame-relay map ip 10.17.0.2 120 broadcast frame-relay map ip 10.17.0.3 130 broadcast frame-relay map ip 10.17.0.4 140 broadcasts2.1=10.17.0.2/24s2.2=10.17.0.1/24s2.1=10.17.0.4