dalin_mcast_cciesg.ppt

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2017-03-25 发布于江苏
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dalin_mcast_cciesg.ppt

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dalin_mcast_cciesg

Configuring TroubleshootingIP Multicast Rube Goldberg (1883-1970) Objectives IP Multicast Routing Overview IP Multicast Routing Overview:IP Addressing IP Multicast Routing Overview:IP Addressing IP Multicast Routing Overview:IP Addressing IP Multicast Routing Overview:IP Addressing IP Multicast Routing Overview:Distribution Tree(s) Anatomy of Mroute Table IP Multicast Routing Overview:Multicast Forwarding Multicast Routing is backwards from Unicast Routing Unicast Routing is concerned about where the packet is going. Multicast Routing is concerned about where the packet came from. Multicast Routing uses “Reverse Path Forwarding” IP Multicast Routing Overview:Multicast Forwarding IP Multicast Routing Overview:Multicast Forwarding IP Multicast Routing Overview:Multicast Forwarding IP Multicast Routing Overview:Multicast Forwarding IP Multicast Routing Overview:Types of Multicast Protocols Dense-mode Uses “Push” Model Traffic Flooded throughout network Pruned back where it is unwanted Flood Prune behavior Sparse-mode Uses “Pull” Model Traffic sent only to where it is requested Explicit Join behavior IP Multicast Routing Overview:Types of Multicast Protocols IP Multicast Routing Overview:PIM Dense Mode Protocol Independent Supports all underlying unicast routing protocols including: static, RIP, IGRP, EIGRP, IS-IS, BGP, and OSPF Uses Reverse Path Forwarding Floods network and prunes back based on multicast group membership Assert mechanism used to prune off redundant flows Appropriate for... Testing, pilot networks Auto-RP IP Multicast Routing Overview:PIM Dense Mode IP Multicast Routing Overview:PIM Dense Mode IP Multicast Routing Overview:PIM Dense Mode IP Multicast Routing Overview:PIM Sparse Mode Supports both source and shared trees Assumes no hosts want multicast traffic unless they specifically ask for it Uses a Rendezvous Point (RP) Senders and Receivers “rendezvous” at this point to learn of each others existence. Senders are “register