rpf检测失败导致组播不可达的经验案例

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1、RPF检测失败导致组播不可达的经验案例一、组网：实际组网如下图，三台MSR路由器启用OSPF，保证全网连通。RouterA与Router分别连接组播源和组播接收PC，希望PC能够正常接收组播数据。二、问题描述：如上图组网后，保证路由状态正常，发现并没有出现想要的结果：接收组播的PC并不能收到组播源的组播报文。三、过程分析：三台路由器上的简略配置和单播路由表如下：RouterA配置sysnameH3C#interfaceSerial3/0link-protocolpppipaddress10.0.0.1255.0.0.0ospfcost1#int

2、erfaceGigabitEthernet0/0portlink-moderouteipaddress20.0.0.1255.0.0.0pimdm#interfaceGigabitEthernet0/1portlink-moderouteipaddress1.0.0.1255.0.0.0pimdm#ospf1area0.0.0.0network1.0.0.00.0.0.255network20.0.0.00.0.0.255network10.0.0.00.0.0.255#disiprouRoutingTables:PublicDest

3、inations:11Routes:12Destination/MaskProtoPreCostNextHopInterface1.0.0.0/8Direct001.0.0.1GE0/11.0.0.1/32Direct00127.0.0.1InLoop02.0.0.0/8OSPF10210.0.0.2S3/010.0.0.0/8Direct0010.0.0.1S3/010.0.0.1/32Direct00127.0.0.1InLoop010.0.0.2/32Direct0010.0.0.2S3/020.0.0.0/8Direct0020.0.0

4、.1GE0/020.0.0.1/32Direct00127.0.0.1InLoop030.0.0.0/8OSPF10220.0.0.3GE0/0OSPF10210.0.0.2S3/0127.0.0.0/8Direct00127.0.0.1InLoop0127.0.0.1/32Direct00127.0.0.1InLoop0RouterB配置sysnameH3C#interfaceEthernet0/0portlink-moderouteipaddress30.0.0.2255.0.0.0pimdm#interfaceEthernet0/1por

5、tlink-moderouteipaddress2.0.0.2255.0.0.0igmpenable#interfaceSerial3/0fe1clockmasterlink-protocolpppipaddress10.0.0.2255.0.0.0ospfcost1#ospf1import-routedirectarea0.0.0.0network2.0.0.00.0.0.255network10.0.0.00.0.0.255network30.0.0.00.0.0.255#disiprouRoutingTables:PublicD

6、estinations:11Routes:12Destination/MaskProtoPreCostNextHopInterface1.0.0.0/8OSPF10210.0.0.1S3/02.0.0.0/8Direct002.0.0.2Eth0/12.0.0.2/32Direct00127.0.0.1InLoop010.0.0.0/8Direct0010.0.0.2S3/010.0.0.1/32Direct0010.0.0.1S3/010.0.0.2/32Direct00127.0.0.1InLoop020.0.0.0/8OSPF10230.

7、0.0.3Eth0/0OSPF10210.0.0.1S3/030.0.0.0/8Direct0030.0.0.2Eth0/030.0.0.2/32Direct00127.0.0.1InLoop0127.0.0.0/8Direct00127.0.0.1InLoop0127.0.0.1/32Direct00127.0.0.1InLoop0RouterC配置sysnameH3C#interfaceEthernet0/0portlink-moderouteipaddress30.0.0.3255.0.0.0pimdm#interfaceEthernet

8、0/1portlink-moderouteipaddress20.0.0.3255.0.0.0pimdm#interfaceNULL0#ospf1ar