hc120111001 理解ospf邻居与邻接关系

1、理解OSPF邻居与邻接关系Copyright 2012Huawei Technologies Co., Ltd. All rights reserved.前言本课程介绍OSPF邻居和邻接的概念。为了交换链路状态信息以及路由信息，OSPF路由器之间首先要建立邻接关系。Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page1培训目标学完本课程后，您应该能： 理解OSPF邻居和邻接的概念 理解OSPF中DR和BDR的概念 理解DR和BDR的选举Copyright 2012 Huawei T

2、echnologies Co., Ltd. All rights reserved.Page2邻居（Neighbor）和邻接（Adjacency）我有三个邻居RTAEthernetCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page3OSPF支持的网络类型点到点和广播类型PPPEthernet点到点网络广播型网络Copyright 2012 Huawe

3、i Technologies Co., Ltd. All rights reserved.Page4OSPF支持的网络类型NBMA类型VPI/VCI=0/102VPI/VCI=0/103全连接ATM网络ATM非广播网络非广播多路访问（NBMA）Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page5OSPF支持的网络类型点到多点类型DLCI = 102DLCI = 103不完全连接的帧中继网络FR非广播网络点到多点（Point-to-MultiPoint）Copyright 2012 Huawe

4、i Technologies Co., Ltd. All rights reserved.Page6常见链路层协议对应的默认网络类型Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page7网络类型常见链路层协议Point-to-pointPPP链路；LAPB链路；HDLC链路Broadcast以太网链路NBMA帧中继链路；ATM链路虚连接（Virtual Link）Area 1Area 0Area 2RTBRTA配置虚连接以使RTB 连接到骨干区域Copyright 2012 Huawei Te

5、chnologies Co., Ltd. All rights reserved.Page8端口状态变换点到点、点到多点网段和虚连接UnloopIndDownLoopbackInterfaceUpP-to-PCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page9Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page10DR和BDR我有三个邻居，但是只有两个邻接RTAEthernet10.1.1.

6、3BDRDRCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page11选举DR和BDRRouter Priority最大的路由器不一定是DR/BDR120Ethernet90100 DRBDR图中数字表示该端口的Router PriorityCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page12配置Router PriorityRTC120图中数

7、字表示该端口的Router PriorityEthernet90100RTABDRDRRTBCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page13RTBinterface Ethernet 0/0RTB-Ethernet0/0ospf dr-priority 100RTB-Ethernet0/0quit RTB端口状态变换广播型网段和NBMA网段UnloopIndDownLoopbackInterfaceUpWaitingWaitTimerBackupSeenBackup?D

8、ROtherNeighbor ChangeNeighbor ChangeNeighbor ChangeDRCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page14Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page15是否和邻居建立邻接关系Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page16网络类型是否和邻居建立邻接关系Point-to

9、-point总是和邻居建立邻接关系Point-to-MultiPoint总是和邻居建立邻接关系Virtual link总是和邻居建立邻接关系Broadcast NBMADR总是和其他所有路由器包括BDR建立邻接关系；BDR总是和其他所有路由器包括DR建立邻接关系； 处于DROther状态的路由器只与DR和BDR建立邻接关系配置NBMA网络RTArouter id RTAospfRTA-ospf-1peer RTA-ospf-1peer RTA-ospf-1area 1RTA-ospf-1-area-network RTA-ospf-

10、1-area-network RTA-ospf-1-area-returnLoopback0/32DLCI = 10 55RTADLCI = 102Area 1FR-SWLoopback0/32Loopback0/32RTBRTCCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page17/24S1/0配置NBMA网络Loopback0 /32DLCI

11、= 103RTADLCI = 102Area 1FR-SWLoopback0 /32Loopback0/32 RTBRTBrouter id RTBospfRTB-ospf-1peer RTB-ospf-1peer RTB-ospf-1area 1RTB-ospf-1-area-network RTB-ospf-1-area-network 55 RTB-ospf-1-area-returnRTCCopyright

12、2012 Huawei Technologies Co., Ltd. All rights reserved.Page18/24S1/0配置NBMA网络 Loopback0 /32DLCI = 103RTADLCI = 102Area 1FR-SWLoopback0/32Loopback0/32 RTCRTCrouter id RTCospfRTC-ospf-1peer RTC-ospf-1peer RTC-ospf-1area 1RTC-ospf-1-area-networ

13、k RTC-ospf-1-area-network 55 RTC-ospf-1-area-returnRTBCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page19/24S1/0配置NBMA网络验证路由表RTAdisplay ip routing-tableRouting Table: public netDestination/Mask/3/3/3210.1

14、.1.0/24/3/3/32/8/32Protocol DIRECT OSPF OSPF DIRECT DIRECT DIRECT DIRECT DIRECTDIRECTPre01010000000Cost015631563000000NexthopInterface InLoopBack0 Serial1/0 Serial1/0 Serial1/0 InL

15、oopBack0 Serial1/0 Serial1/0 InLoopBack0InLoopBack0Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page20配置NBMA网络验证OSPF端口信息RTAdisplay ospf interface Serial 1/0OSPF Process 1 with Router IDInterfacesInterface: (Serial1/0)Cost: 1562 State: DROther Priority: 1Designated

16、 Router: Type: NBMABackup Designated Router: Timers: Hello 30, Dead 120, Poll 120, Retransmit5, TransmitDelay 1Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page21配置点到多点网络RTALoopback0/32DLCI = 103DLCI = 102Area 1FR-SWLoopback0 /32Loopback0/32RT

17、BRTCCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page2/24S1/0RTArouter id RTAospfRTA-ospf-1area 1RTA-ospf-1-area-network RTA-ospf-1-area-network 55 RTAinterface Serial 1/0RTA-Serial1/0ospf network-type p2mpRTA-Serial1/0

18、return配置点到多点网络Loopback0RTA/32DLCI = 103DLCI = 102Area 1FR-SWLoopback0 /32Loopback0/32RTBRTCCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page23/24S1/0RTBrouter id RTBospfRTB-ospf-1area 1RTB-ospf-1-area-network RTB-ospf-1-a

19、rea-network 55 RTBinterface Serial 1/0RTB-Serial1/0ospf network-type p2mpRTB-Serial1/0return配置点到多点网络Loopback0RTA/32DLCI = 103DLCI = 102Area 1FR-SWLoopback0 /32Loopback0/32RTBRTCCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page24

20、/24S1/0RTCrouter id RTCospfRTC-ospf-1area 1RTC-ospf-1-area-network RTC-ospf-1-area-network 55 RTCinterface Serial 1/0RTC-Serial1/0ospf network-type p2mpRTC-Serial1/0return配置点到多点网络验证路由表RTCdisplay ip routing-tableRouting Table: public netDestination

21、/Mask/3/3/3/24/3/3/32/8/32Protocol OSPF OSPF DIRECT DIRECT DIRECT OSPF DIRECT DIRECTDIRECTPre101000010000Cost156331250003124000NexthopInterface Seri

22、al1/0 Serial1/0 InLoopBack0 Serial1/0 Serial1/0 Serial1/0 InLoopBack0 InLoopBack0InLoopBack0Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page25配置点到多点网络验证OSPF端口信息RTCdisplay ospf interface Serial 1/0OSPF Process 1 with Router ID InterfacesInterface: Cost: 1562 State:

23、Priority: 1Timers: Hello 30,(Serial1/0)PtoPType: PointToMultiPointDead120, Poll 120, Retransmit 5,Transmit Delay1Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page26配置虚连接RTBRTCArea 1Loopback0Loopback0E0/1.1E0/.2/3//32Area 2Area 0Loopback0Loopback0/

24、3/32RTARTDCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page27E0/1E0/0 ./24 .2E0/0E0/0.1 /24.2RTArouter id RTAospfRTA-ospf-1area 0RTA-ospf-1-area-network RTA-ospf-1-area-network 55 RTA-ospf-1-area-0.0.0.

25、0return配置虚连接RTBRTCArea 1Loopback0Loopback0E0/1.1E0/.2/3//32Area 2Area 0Loopback0Loopback0RTARTD/3/32Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page28E0/1E0/0 ./24 .2E0/0E0/.0/24.2RTBrouter id RTBospfRTB-ospf-1ar

26、ea 0RTB-ospf-1-area-network RTB-ospf-1-area-network 55RTB-ospf-1area 1RTB-ospf-1-area-network 55RTB-ospf-1-area-vlink-peer RTB-ospf-1-area-return配置虚连接RTBRTCArea 1Loopback0Loopback0E0/1.1E0/.2/3/

27、/32Area 2Area 0Loopback0Loopback0RTARTD/3/32Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved.Page29E0/1E0/0 ./24 .2E0/0E0/.0/24.2RTCrouter id RTCospfRTC-ospf-1area 1RTC-ospf-1-area-network 55RTC-ospf-1-area-0.0.

28、0.1vlink-peer RTC-ospf-1area 2RTC-ospf-1-area-network RTC-ospf-1-area-network 55RTC-ospf-1-area-return配置虚连接RTBRTCArea 1Loopback0Loopback0E0/1.1E0/.2/3//32Area 2Area 0Loopback0Loopback0RTARTD/3/32Copyr

29、ight 2012 Huawei Technologies Co., Ltd. All rights reserved.Page30E0/1E0/0 ./24 .2E0/0E0/0.1 /24.2RTDrouter id RTDospfRTD-ospf-1area 2RTD-ospf-1-area-network RTD-ospf-1-area-network 55 RTD-ospf-1-area-return配置虚连接验证路由表RTDdisplay ip routing-tableRouting Table: public netDestination/Mask/3/3/3/3/24/24/24/32/8127