Netgear GSM7352Sv1 7000 Series Managed Switch Administration Guide for Softwar - Page 529
DVMRP, Con DVMRP on a NETGEAR Switch
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NETGEAR Managed Switches Software Administration Manual, Release 8.0 Chapter 31 DVMRP The Distance Vector Multicast Routing Protocol (DVMRP) is used for multicasting over IP networks without routing protocols to support multicast. The DVMRP is based on the RIP protocol but more complicated than RIP. DVRMP maintains a link-state database to keep track of the return paths to the source of multicast packages. The DVMRP protocol operates as follows: • The first message for any source-group pair is forwarded to the entire multicast network, with respect to the time-to-live (TTL) of the packet. • TTL restricts the area to be flooded by the message. • All the leaf routers that do not have members on directly attached subnetworks send back prune messages to the upstream router. • The branch that transmitted a prune message is deleted from the delivery tree. • The delivery tree, which is spanning to all the members in the multicast group, is constructed. Configure DVMRP on a NETGEAR Switch In this example, DVMRP is running on the switch A,B and C. IGMP is also running on the Switch C which is connected to the host directly. After host sends a IGMP report to switch C. Multicast streams will be sent from multicast resource to the host along the path built by DVMRP. DVMRP v1.0, October 2009 31-1
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