组播的配置和验证.ppt

* IGMP State in “rtr-a”: Group 224.1.1.1 is active on Ethernet 0 and Has been active on this interface for six days and 17 hours. It expires (and will be deleted) in two minutes and 31 seconds if an IGMP Host Membership report for this group is not heard in that time. The last Host to report membership was 1.1.1.11 (H2). Group 224.0.1.40 (Auto-RP) is automatically joined by Cisco routers and thus its expiration shows never. * Use the show multicast group command to display the multicast group configuration. Use the show multicast router command to display the information about dynamically learned and manually configured multicast router ports. IGMP keyword specifies to display only the configuration information learned through IGMP. * In the example above we have IGMP enabled multicast router with the IP address 10.0.0.1 and a multicast receiver with the IP address 10.0.0.2 connected to the router via switch that has IGMP Snooping enabled over ports 4/1 and 4/2 respectively. Both ports are in a vlan 10. The IGMP router with the MAC address 00-10-11-7e-74-8d is a member of multicast group 224.0.1.40 and the multicast receiver with the MAC address 00-90-5f-69-a0-21 is receiving mulicast traffic from multicast group 224.1.2.3. * The output of show igmp statistics shows sample statistics for VLAN 10. The number of Group Specific Queries and General Queries is shown along with the number of Host Memebrship Report and Group Leave messages. The statistics are split into Receive and Transmit parts. * The show multicast router command displays the information about IGMP router port and VLAN configuration on a switch. The show multicast group igmp command list the information about the VLAN, multicast group and ports that are joined to that multicast group on a switch. * * 实现多播传输 多播的配置和验证 PIM-SM 配置命令 ip multicast-routing router(config)# 启用多播路由. ip pim { sparse-mode | sparse-dense-mode } router(config-if)# 在接口上启用PIM稀疏模式，sparse-dense-mode选项允许稀疏密集模式的组播. ip pim send-rp-ann