ZyXEL MM-7201 User Guide - Page 260
DVMRP Terminology
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Chapter 35 DVMRP 4 The final multicast ("M") after pruning and grafting is shown in the next figure. Figure 117 How DVMRP Works 35.2.1 DVMRP Terminology DVMRP probes are used to discover other DVMRP Neighbors on a network. DVMRP reports are used to exchange DVMRP source routing information. These packets are used to build the DVMRP multicast routing table that is used to build source trees and also perform Reverse Path Forwarding (RPF) checks on incoming multicast packets. RPF checks prevent duplicate packets being filtered when loops exist in the network topology. DVMRP prunes trim the multicast delivery tree(s). DVMRP grafts attach a branch back onto the multicast delivery tree. 35.3 DVMRP Use this screen to configure DVMRP on the switch when you wish it to act as a multicast router ("mrouter"). To open this screen, click IP Application > DVMRP. Figure 118 DVMRP 260 MS-7206 User's Guide